/**
 * Java: class extends + implements multiple interfaces + ambiguous package disambiguation
 */
import { describe, it, expect, beforeAll } from 'vitest';
import path from 'path';
import {
  FIXTURES,
  CROSS_FILE_FIXTURES,
  getRelationships,
  getNodesByLabel,
  getNodesByLabelFull,
  edgeSet,
  runPipelineFromRepo,
  type PipelineResult,
} from './helpers.js';

// ---------------------------------------------------------------------------
// Heritage: class extends + implements multiple interfaces
// ---------------------------------------------------------------------------

describe('Java heritage resolution', () => {
  let result: PipelineResult;

  beforeAll(async () => {
    result = await runPipelineFromRepo(path.join(FIXTURES, 'java-heritage'), () => {});
  }, 60000);

  it('detects exactly 3 classes and 2 interfaces', () => {
    expect(getNodesByLabel(result, 'Class')).toEqual(['BaseModel', 'User', 'UserService']);
    expect(getNodesByLabel(result, 'Interface')).toEqual(['Serializable', 'Validatable']);
  });

  it('emits exactly 1 EXTENDS edge: User → BaseModel', () => {
    const extends_ = getRelationships(result, 'EXTENDS');
    expect(extends_.length).toBe(1);
    expect(extends_[0].source).toBe('User');
    expect(extends_[0].target).toBe('BaseModel');
  });

  it('emits exactly 2 IMPLEMENTS edges: User → Serializable, User → Validatable', () => {
    const implements_ = getRelationships(result, 'IMPLEMENTS');
    expect(implements_.length).toBe(2);
    expect(edgeSet(implements_)).toEqual(['User → Serializable', 'User → Validatable']);
  });

  it('resolves exactly 4 IMPORTS edges', () => {
    const imports = getRelationships(result, 'IMPORTS');
    expect(imports.length).toBe(4);
    expect(edgeSet(imports)).toEqual([
      'User.java → Serializable.java',
      'User.java → Validatable.java',
      'UserService.java → Serializable.java',
      'UserService.java → User.java',
    ]);
  });

  it('does not emit EXTENDS edges to interfaces', () => {
    const extends_ = getRelationships(result, 'EXTENDS');
    expect(extends_.some((e) => e.target === 'Serializable')).toBe(false);
    expect(extends_.some((e) => e.target === 'Validatable')).toBe(false);
  });

  it('emits exactly 3 CALLS edges', () => {
    const calls = getRelationships(result, 'CALLS');
    expect(calls.length).toBe(3);
    expect(edgeSet(calls)).toEqual([
      'processUser → save',
      'processUser → serialize',
      'processUser → validate',
    ]);
  });

  it('no OVERRIDES edges target Property nodes', () => {
    const overrides = getRelationships(result, 'METHOD_OVERRIDES');
    for (const edge of overrides) {
      const target = result.graph.getNode(edge.rel.targetId);
      expect(target).toBeDefined();
      expect(target!.label).not.toBe('Property');
    }
  });
});

// ---------------------------------------------------------------------------
// Ambiguous: Handler + Processor in two packages, imports disambiguate
// ---------------------------------------------------------------------------

describe('Java ambiguous symbol resolution', () => {
  let result: PipelineResult;

  beforeAll(async () => {
    result = await runPipelineFromRepo(path.join(FIXTURES, 'java-ambiguous'), () => {});
  }, 60000);

  it('detects 2 Handler classes and 2 Processor interfaces', () => {
    const classes = getNodesByLabel(result, 'Class');
    expect(classes.filter((n) => n === 'Handler').length).toBe(2);
    expect(classes).toContain('UserHandler');
    const ifaces = getNodesByLabel(result, 'Interface');
    expect(ifaces.filter((n) => n === 'Processor').length).toBe(2);
  });

  it('resolves EXTENDS to models/Handler (not other/Handler)', () => {
    const extends_ = getRelationships(result, 'EXTENDS');
    expect(extends_.length).toBe(1);
    expect(extends_[0].source).toBe('UserHandler');
    expect(extends_[0].target).toBe('Handler');
    expect(extends_[0].targetFilePath).toBe('models/Handler.java');
  });

  it('resolves IMPLEMENTS to models/Processor (not other/Processor)', () => {
    const implements_ = getRelationships(result, 'IMPLEMENTS');
    expect(implements_.length).toBe(1);
    expect(implements_[0].source).toBe('UserHandler');
    expect(implements_[0].target).toBe('Processor');
    expect(implements_[0].targetFilePath).toBe('models/Processor.java');
  });

  it('import edges point to models/ not other/', () => {
    const imports = getRelationships(result, 'IMPORTS');
    const targets = imports.map((e) => e.target).sort();
    expect(targets).toContain('Handler.java');
    expect(targets).toContain('Processor.java');
    for (const imp of imports) {
      expect(imp.targetFilePath).toMatch(/^models\//);
    }
  });

  it('all heritage edges point to real graph nodes', () => {
    for (const edge of [
      ...getRelationships(result, 'EXTENDS'),
      ...getRelationships(result, 'IMPLEMENTS'),
    ]) {
      const target = result.graph.getNode(edge.rel.targetId);
      expect(target).toBeDefined();
      expect(target!.properties.name).toBe(edge.target);
    }
  });
});

describe('Java qualified class names', () => {
  let result: PipelineResult;

  beforeAll(async () => {
    result = await runPipelineFromRepo(path.join(FIXTURES, 'java-qualified-types'), () => {});
  }, 60000);

  it('stores distinct qualified names for same-named classes across packages', () => {
    const users = getNodesByLabelFull(result, 'Class').filter((node) => node.name === 'User');
    expect(users).toHaveLength(2);
    expect(users.map((node) => node.properties.qualifiedName).sort()).toEqual([
      'com.example.admin.User',
      'com.example.models.User',
    ]);
  });
});

describe('Java call resolution with arity filtering', () => {
  let result: PipelineResult;

  beforeAll(async () => {
    result = await runPipelineFromRepo(path.join(FIXTURES, 'java-calls'), () => {});
  }, 60000);

  it('resolves processUser → writeAudit to util/OneArg.java via arity narrowing', () => {
    const calls = getRelationships(result, 'CALLS');
    expect(calls.length).toBe(1);
    expect(calls[0].source).toBe('processUser');
    expect(calls[0].target).toBe('writeAudit');
    expect(calls[0].targetFilePath).toBe('util/OneArg.java');
    expect(calls[0].rel.reason).toBe('import-resolved');
  });
});

// ---------------------------------------------------------------------------
// Member-call resolution: obj.method() resolves through pipeline
// ---------------------------------------------------------------------------

describe('Java member-call resolution', () => {
  let result: PipelineResult;

  beforeAll(async () => {
    result = await runPipelineFromRepo(path.join(FIXTURES, 'java-member-calls'), () => {});
  }, 60000);

  it('resolves processUser → save as a member call on User', () => {
    const calls = getRelationships(result, 'CALLS');
    const saveCall = calls.find((c) => c.target === 'save');
    expect(saveCall).toBeDefined();
    expect(saveCall!.source).toBe('processUser');
    expect(saveCall!.targetFilePath).toBe('models/User.java');
  });

  it('detects User class and save method', () => {
    expect(getNodesByLabel(result, 'Class')).toContain('User');
    expect(getNodesByLabel(result, 'Method')).toContain('save');
  });

  it('emits HAS_METHOD edge from User to save', () => {
    const hasMethod = getRelationships(result, 'HAS_METHOD');
    const edge = hasMethod.find((e) => e.source === 'User' && e.target === 'save');
    expect(edge).toBeDefined();
  });
});

// ---------------------------------------------------------------------------
// Constructor resolution: new Foo() resolves to Constructor/Class
// ---------------------------------------------------------------------------

describe('Java constructor-call resolution', () => {
  let result: PipelineResult;

  beforeAll(async () => {
    result = await runPipelineFromRepo(path.join(FIXTURES, 'java-constructor-calls'), () => {});
  }, 60000);

  it('resolves new User() as a CALLS edge to the User constructor', () => {
    const calls = getRelationships(result, 'CALLS');
    const ctorCall = calls.find((c) => c.target === 'User');
    expect(ctorCall).toBeDefined();
    expect(ctorCall!.source).toBe('processUser');
    // Java has explicit constructor_declaration → Constructor node
    expect(ctorCall!.targetLabel).toBe('Constructor');
    expect(ctorCall!.targetFilePath).toBe('models/User.java');
  });

  it('also resolves user.save() as a member call', () => {
    const calls = getRelationships(result, 'CALLS');
    const saveCall = calls.find((c) => c.target === 'save');
    expect(saveCall).toBeDefined();
    expect(saveCall!.source).toBe('processUser');
  });

  it('detects User class, User constructor, save method', () => {
    expect(getNodesByLabel(result, 'Class')).toContain('User');
    expect(getNodesByLabel(result, 'Constructor')).toContain('User');
    expect(getNodesByLabel(result, 'Method')).toContain('save');
  });
});

// ---------------------------------------------------------------------------
// Receiver-constrained resolution: typed variables disambiguate same-named methods
// ---------------------------------------------------------------------------

describe('Java receiver-constrained resolution', () => {
  let result: PipelineResult;

  beforeAll(async () => {
    result = await runPipelineFromRepo(path.join(FIXTURES, 'java-receiver-resolution'), () => {});
  }, 60000);

  it('detects User and Repo classes, both with save methods', () => {
    expect(getNodesByLabel(result, 'Class')).toContain('User');
    expect(getNodesByLabel(result, 'Class')).toContain('Repo');
    const saveMethods = getNodesByLabel(result, 'Method').filter((m) => m === 'save');
    expect(saveMethods.length).toBe(2);
  });

  it('resolves user.save() to User.save and repo.save() to Repo.save via receiver typing', () => {
    const calls = getRelationships(result, 'CALLS');
    const saveCalls = calls.filter((c) => c.target === 'save');
    expect(saveCalls.length).toBe(2);

    const userSave = saveCalls.find((c) => c.targetFilePath === 'models/User.java');
    const repoSave = saveCalls.find((c) => c.targetFilePath === 'models/Repo.java');

    expect(userSave).toBeDefined();
    expect(repoSave).toBeDefined();
    expect(userSave!.source).toBe('processEntities');
    expect(repoSave!.source).toBe('processEntities');
  });

  it('resolves constructor calls for both User and Repo', () => {
    const calls = getRelationships(result, 'CALLS');
    const userCtor = calls.find((c) => c.target === 'User');
    const repoCtor = calls.find((c) => c.target === 'Repo');
    expect(userCtor).toBeDefined();
    expect(repoCtor).toBeDefined();
  });
});

// ---------------------------------------------------------------------------
// Method references: expr::method, Type::method, Type::new, this::m, super::m
// ---------------------------------------------------------------------------

describe('Java method-reference resolution', () => {
  let result: PipelineResult;

  beforeAll(async () => {
    result = await runPipelineFromRepo(path.join(FIXTURES, 'java-method-reference'), () => {});
  }, 60000);

  it('resolves project method references to CALLS edges', () => {
    const calls = getRelationships(result, 'CALLS');

    expect(
      calls.find(
        (c) =>
          c.source === 'mapViaInstanceBuilder' &&
          c.target === 'buildResponse' &&
          c.targetFilePath === 'models/ResponseBuilder.java',
      ),
    ).toBeDefined();

    expect(
      calls.find(
        (c) =>
          c.source === 'mapViaStaticUtil' &&
          c.target === 'format' &&
          c.targetFilePath === 'util/FormatUtil.java',
      ),
    ).toBeDefined();

    expect(
      calls.find(
        (c) =>
          c.source === 'mapUserNames' &&
          c.target === 'getName' &&
          c.targetFilePath === 'models/User.java',
      ),
    ).toBeDefined();

    expect(
      calls.find(
        (c) =>
          c.source === 'mapSaves' &&
          c.target === 'saveOne' &&
          c.targetFilePath === 'services/MethodRefService.java',
      ),
    ).toBeDefined();

    expect(
      calls.find(
        (c) =>
          c.source === 'wrapTransform' &&
          c.target === 'transform' &&
          c.targetFilePath === 'models/BaseHandler.java',
      ),
    ).toBeDefined();
  });

  it('resolves constructor references to Constructor nodes', () => {
    const calls = getRelationships(result, 'CALLS');
    const ctorRef = calls.find(
      (c) =>
        c.source === 'mapNewUsers' &&
        c.target === 'User' &&
        c.targetFilePath === 'models/User.java',
    );

    expect(ctorRef).toBeDefined();
    expect(ctorRef!.targetLabel).toBe('Constructor');
  });
});

// ---------------------------------------------------------------------------
// Named import disambiguation: two User classes, import resolves to correct one
// ---------------------------------------------------------------------------

describe('Java named import disambiguation', () => {
  let result: PipelineResult;

  beforeAll(async () => {
    result = await runPipelineFromRepo(path.join(FIXTURES, 'java-named-imports'), () => {});
  }, 60000);

  it('detects two User classes in different packages', () => {
    const users = getNodesByLabel(result, 'Class').filter((n) => n === 'User');
    expect(users.length).toBe(2);
  });

  it('resolves user.save() to com/example/models/User.java via named import', () => {
    const calls = getRelationships(result, 'CALLS');
    const saveCall = calls.find((c) => c.target === 'save');
    expect(saveCall).toBeDefined();
    expect(saveCall!.source).toBe('run');
    expect(saveCall!.targetFilePath).toBe('com/example/models/User.java');
  });

  it('resolves new User() to com/example/models/User.java, not other/', () => {
    const calls = getRelationships(result, 'CALLS');
    const ctorCall = calls.find((c) => c.target === 'User' && c.source === 'run');
    expect(ctorCall).toBeDefined();
    expect(ctorCall!.targetFilePath).toBe('com/example/models/User.java');
  });
});

// ---------------------------------------------------------------------------
// Variadic resolution: String... doesn't get filtered by arity
// ---------------------------------------------------------------------------

describe('Java variadic call resolution', () => {
  let result: PipelineResult;

  beforeAll(async () => {
    result = await runPipelineFromRepo(path.join(FIXTURES, 'java-variadic-resolution'), () => {});
  }, 60000);

  it('resolves 3-arg call to varargs method record(String...) in Logger.java', () => {
    const calls = getRelationships(result, 'CALLS');
    const logCall = calls.find((c) => c.target === 'record');
    expect(logCall).toBeDefined();
    expect(logCall!.source).toBe('run');
    expect(logCall!.targetFilePath).toBe('com/example/util/Logger.java');
  });

  it('CALLS edges from within variadic method have valid sourceId (no ID mismatch)', () => {
    // Collect all CALLS edges whose source is in Logger.java
    const danglingSourceIds: string[] = [];
    for (const rel of result.graph.iterRelationships()) {
      if (rel.type !== 'CALLS') continue;
      const sourceNode = result.graph.getNode(rel.sourceId);
      if (!sourceNode) {
        danglingSourceIds.push(rel.sourceId);
        continue;
      }
      // Specifically flag Logger.java sources that don't resolve
      if (
        sourceNode.properties.filePath === 'com/example/util/Logger.java' &&
        !result.graph.getNode(rel.sourceId)
      ) {
        danglingSourceIds.push(rel.sourceId);
      }
    }

    // No CALLS edge should have a dangling (unresolvable) sourceId.
    // This catches the bug where definition creates Method:...record#N but
    // findEnclosingFunctionId generates Method:...record (no suffix),
    // producing CALLS edges whose sourceId doesn't match any graph node.
    expect(danglingSourceIds).toEqual([]);

    // Additionally verify that ALL relationships (not just CALLS) have
    // resolvable sourceIds — a stronger invariant.
    const allDangling: string[] = [];
    for (const rel of result.graph.iterRelationships()) {
      if (!result.graph.getNode(rel.sourceId)) {
        allDangling.push(`${rel.type}:${rel.sourceId}`);
      }
    }
    expect(allDangling).toEqual([]);
  });
});

// ---------------------------------------------------------------------------
// Local shadow: same-file definition takes priority over imported name
// ---------------------------------------------------------------------------

describe('Java local definition shadows import', () => {
  let result: PipelineResult;

  beforeAll(async () => {
    result = await runPipelineFromRepo(path.join(FIXTURES, 'java-local-shadow'), () => {});
  }, 60000);

  it('resolves run → save to same-file definition, not the imported one', () => {
    const calls = getRelationships(result, 'CALLS');
    const saveCall = calls.find((c) => c.target === 'save' && c.source === 'run');
    expect(saveCall).toBeDefined();
    expect(saveCall!.targetFilePath).toBe('src/main/java/com/example/app/Main.java');
  });

  it('does NOT resolve save to Logger.java', () => {
    const calls = getRelationships(result, 'CALLS');
    const saveToUtils = calls.find(
      (c) =>
        c.target === 'save' && c.targetFilePath === 'src/main/java/com/example/utils/Logger.java',
    );
    expect(saveToUtils).toBeUndefined();
  });
});

// ---------------------------------------------------------------------------
// Constructor-inferred type resolution: var user = new User(); user.save()
// Java 10+ local variable type inference (no explicit type annotations)
// ---------------------------------------------------------------------------

describe('Java constructor-inferred type resolution', () => {
  let result: PipelineResult;

  beforeAll(async () => {
    result = await runPipelineFromRepo(
      path.join(FIXTURES, 'java-constructor-type-inference'),
      () => {},
    );
  }, 60000);

  it('detects User and Repo classes, both with save methods', () => {
    expect(getNodesByLabel(result, 'Class')).toContain('User');
    expect(getNodesByLabel(result, 'Class')).toContain('Repo');
    const saveMethods = getNodesByLabel(result, 'Method').filter((m) => m === 'save');
    expect(saveMethods.length).toBe(2);
  });

  it('resolves user.save() to models/User.java via constructor-inferred type', () => {
    const calls = getRelationships(result, 'CALLS');
    const userSave = calls.find(
      (c) => c.target === 'save' && c.targetFilePath === 'models/User.java',
    );
    expect(userSave).toBeDefined();
    expect(userSave!.source).toBe('processEntities');
  });

  it('resolves repo.save() to models/Repo.java via constructor-inferred type', () => {
    const calls = getRelationships(result, 'CALLS');
    const repoSave = calls.find(
      (c) => c.target === 'save' && c.targetFilePath === 'models/Repo.java',
    );
    expect(repoSave).toBeDefined();
    expect(repoSave!.source).toBe('processEntities');
  });

  it('emits exactly 2 save() CALLS edges (one per receiver type)', () => {
    const calls = getRelationships(result, 'CALLS');
    const saveCalls = calls.filter((c) => c.target === 'save');
    expect(saveCalls.length).toBe(2);
  });
});

// ---------------------------------------------------------------------------
// For-each loop element typing: for (User user : users) user.save()
// Java: explicit type in enhanced_for_statement binds loop variable
// ---------------------------------------------------------------------------

describe('Java for-each loop element type resolution', () => {
  let result: PipelineResult;

  beforeAll(async () => {
    result = await runPipelineFromRepo(path.join(FIXTURES, 'java-foreach'), () => {});
  }, 60000);

  it('detects User and Repo classes, both with save methods', () => {
    expect(getNodesByLabel(result, 'Class')).toContain('User');
    expect(getNodesByLabel(result, 'Class')).toContain('Repo');
    const saveMethods = getNodesByLabel(result, 'Method').filter((m) => m === 'save');
    expect(saveMethods.length).toBe(2);
  });

  it('resolves user.save() in for-each to User#save (not Repo#save)', () => {
    const calls = getRelationships(result, 'CALLS');
    const userSave = calls.find(
      (c) => c.target === 'save' && c.targetFilePath === 'models/User.java',
    );
    expect(userSave).toBeDefined();
    expect(userSave!.source).toBe('processEntities');
  });

  it('resolves repo.save() in for-each to Repo#save (not User#save)', () => {
    const calls = getRelationships(result, 'CALLS');
    const repoSave = calls.find(
      (c) => c.target === 'save' && c.targetFilePath === 'models/Repo.java',
    );
    expect(repoSave).toBeDefined();
    expect(repoSave!.source).toBe('processEntities');
  });

  it('emits exactly 2 save() CALLS edges (one per receiver type)', () => {
    const calls = getRelationships(result, 'CALLS');
    const saveCalls = calls.filter((c) => c.target === 'save');
    expect(saveCalls.length).toBe(2);
  });
});

// ---------------------------------------------------------------------------
// this.save() resolves to enclosing class's own save method
// ---------------------------------------------------------------------------

describe('Java this resolution', () => {
  let result: PipelineResult;

  beforeAll(async () => {
    result = await runPipelineFromRepo(path.join(FIXTURES, 'java-self-this-resolution'), () => {});
  }, 60000);

  it('detects User and Repo classes, each with a save method', () => {
    expect(getNodesByLabel(result, 'Class')).toEqual(['Repo', 'User']);
    const saveMethods = getNodesByLabel(result, 'Method').filter((m) => m === 'save');
    expect(saveMethods.length).toBe(2);
  });

  it('resolves this.save() inside User.process to User.save, not Repo.save', () => {
    const calls = getRelationships(result, 'CALLS');
    const saveCall = calls.find((c) => c.target === 'save' && c.source === 'process');
    expect(saveCall).toBeDefined();
    expect(saveCall!.targetFilePath).toBe('src/models/User.java');
  });
});

// ---------------------------------------------------------------------------
// Parent class resolution: EXTENDS + IMPLEMENTS edges
// ---------------------------------------------------------------------------

describe('Java parent resolution', () => {
  let result: PipelineResult;

  beforeAll(async () => {
    result = await runPipelineFromRepo(path.join(FIXTURES, 'java-parent-resolution'), () => {});
  }, 60000);

  it('detects BaseModel and User classes plus Serializable interface', () => {
    expect(getNodesByLabel(result, 'Class')).toEqual(['BaseModel', 'User']);
    expect(getNodesByLabel(result, 'Interface')).toEqual(['Serializable']);
  });

  it('emits EXTENDS edge: User → BaseModel', () => {
    const extends_ = getRelationships(result, 'EXTENDS');
    expect(extends_.length).toBe(1);
    expect(extends_[0].source).toBe('User');
    expect(extends_[0].target).toBe('BaseModel');
  });

  it('emits IMPLEMENTS edge: User → Serializable', () => {
    const implements_ = getRelationships(result, 'IMPLEMENTS');
    expect(implements_.length).toBe(1);
    expect(implements_[0].source).toBe('User');
    expect(implements_[0].target).toBe('Serializable');
  });

  it('all heritage edges point to real graph nodes', () => {
    for (const edge of [
      ...getRelationships(result, 'EXTENDS'),
      ...getRelationships(result, 'IMPLEMENTS'),
    ]) {
      const target = result.graph.getNode(edge.rel.targetId);
      expect(target).toBeDefined();
      expect(target!.properties.name).toBe(edge.target);
    }
  });
});

// ---------------------------------------------------------------------------
// super.save() resolves to parent class's save method
// ---------------------------------------------------------------------------

describe('Java super resolution', () => {
  let result: PipelineResult;

  beforeAll(async () => {
    result = await runPipelineFromRepo(path.join(FIXTURES, 'java-super-resolution'), () => {});
  }, 60000);

  it('detects BaseModel, User, and Repo classes', () => {
    expect(getNodesByLabel(result, 'Class')).toEqual(['BaseModel', 'Repo', 'User']);
  });

  it('resolves super.save() inside User to BaseModel.save, not Repo.save', () => {
    const calls = getRelationships(result, 'CALLS');
    const superSave = calls.find(
      (c) =>
        c.source === 'save' &&
        c.target === 'save' &&
        c.targetFilePath === 'src/models/BaseModel.java',
    );
    expect(superSave).toBeDefined();
    const repoSave = calls.find(
      (c) => c.target === 'save' && c.targetFilePath === 'src/models/Repo.java',
    );
    expect(repoSave).toBeUndefined();
  });
});

// ---------------------------------------------------------------------------
// super.save() resolves to generic parent class's save method
// ---------------------------------------------------------------------------

describe('Java generic parent super resolution', () => {
  let result: PipelineResult;

  beforeAll(async () => {
    result = await runPipelineFromRepo(
      path.join(FIXTURES, 'java-generic-parent-resolution'),
      () => {},
    );
  }, 60000);

  it('detects BaseModel, User, and Repo classes', () => {
    expect(getNodesByLabel(result, 'Class')).toEqual(['BaseModel', 'Repo', 'User']);
  });

  it('resolves super.save() inside User to BaseModel.save, not Repo.save', () => {
    const calls = getRelationships(result, 'CALLS');
    const superSave = calls.find(
      (c) =>
        c.source === 'save' &&
        c.target === 'save' &&
        c.targetFilePath === 'src/models/BaseModel.java',
    );
    expect(superSave).toBeDefined();
    const repoSave = calls.find(
      (c) => c.target === 'save' && c.targetFilePath === 'src/models/Repo.java',
    );
    expect(repoSave).toBeUndefined();
  });
});

// ---------------------------------------------------------------------------
// Return type inference: var user = svc.getUser("alice"); user.save()
// Java's CONSTRUCTOR_BINDING_SCANNER handles `var` declarations with
// method_invocation values, enabling end-to-end return type inference.
// ---------------------------------------------------------------------------

describe('Java return type inference via explicit method return type', () => {
  let result: PipelineResult;

  beforeAll(async () => {
    result = await runPipelineFromRepo(path.join(FIXTURES, 'java-return-type-inference'), () => {});
  }, 60000);

  it('detects User and UserService classes', () => {
    expect(getNodesByLabel(result, 'Class')).toContain('User');
    expect(getNodesByLabel(result, 'Class')).toContain('UserService');
  });

  it('detects save and getUser methods', () => {
    const methods = getNodesByLabel(result, 'Method');
    expect(methods).toContain('save');
    expect(methods).toContain('getUser');
  });

  it('resolves user.save() to User#save via return type of getUser(): User', () => {
    // Java's CONSTRUCTOR_BINDING_SCANNER binds `var user = svc.getUser()` to the
    // return type of getUser (User), so the subsequent user.save() call resolves
    // to User#save rather than an unresolved target.
    const calls = getRelationships(result, 'CALLS');
    const saveCall = calls.find(
      (c) =>
        c.target === 'save' && c.source === 'processUser' && c.targetFilePath.includes('models'),
    );
    expect(saveCall).toBeDefined();
  });
});

// ---------------------------------------------------------------------------
// Nullable receiver: Java uses explicit type annotations (User user = findUser())
// Tests that regular typed receiver resolution works with competing save() methods
// when the variable is assigned from a factory method returning the same type.
// Note: Java Optional<User> stores just "Optional" in TypeEnv (generics stripped),
// so this test uses plain typed variables to validate receiver disambiguation.
// ---------------------------------------------------------------------------

describe('Java nullable receiver resolution (typed factory return)', () => {
  let result: PipelineResult;

  beforeAll(async () => {
    result = await runPipelineFromRepo(path.join(FIXTURES, 'java-nullable-receiver'), () => {});
  }, 60000);

  it('detects User and Repo classes, both with save methods', () => {
    expect(getNodesByLabel(result, 'Class')).toContain('User');
    expect(getNodesByLabel(result, 'Class')).toContain('Repo');
    const saveMethods = getNodesByLabel(result, 'Method').filter((m) => m === 'save');
    expect(saveMethods.length).toBe(2);
  });

  it('resolves user.save() to User.save via receiver typing', () => {
    const calls = getRelationships(result, 'CALLS');
    const userSave = calls.find(
      (c) => c.target === 'save' && c.targetFilePath === 'models/User.java',
    );
    expect(userSave).toBeDefined();
    expect(userSave!.source).toBe('processEntities');
  });

  it('resolves repo.save() to Repo.save via receiver typing', () => {
    const calls = getRelationships(result, 'CALLS');
    const repoSave = calls.find(
      (c) => c.target === 'save' && c.targetFilePath === 'models/Repo.java',
    );
    expect(repoSave).toBeDefined();
    expect(repoSave!.source).toBe('processEntities');
  });

  it('user.save() does NOT resolve to Repo.save (negative disambiguation)', () => {
    const calls = getRelationships(result, 'CALLS');
    const saveCalls = calls.filter((c) => c.target === 'save' && c.source === 'processEntities');
    // Each save() call should resolve to exactly one target file
    expect(saveCalls.filter((c) => c.targetFilePath === 'models/User.java').length).toBe(1);
    expect(saveCalls.filter((c) => c.targetFilePath === 'models/Repo.java').length).toBe(1);
  });

  it('emits exactly 2 save() CALLS edges (one per receiver type)', () => {
    const calls = getRelationships(result, 'CALLS');
    const saveCalls = calls.filter((c) => c.target === 'save');
    expect(saveCalls.length).toBe(2);
  });
});

// ---------------------------------------------------------------------------
// Assignment chain propagation (Phase 4.3)
// ---------------------------------------------------------------------------

describe('Java assignment chain propagation', () => {
  let result: PipelineResult;

  beforeAll(async () => {
    result = await runPipelineFromRepo(path.join(FIXTURES, 'java-assignment-chain'), () => {});
  }, 60000);

  it('detects User and Repo classes each with a save method', () => {
    expect(getNodesByLabel(result, 'Class')).toContain('User');
    expect(getNodesByLabel(result, 'Class')).toContain('Repo');
    const saveMethods = getNodesByLabel(result, 'Method').filter((m) => m === 'save');
    expect(saveMethods.length).toBe(2);
  });

  it('resolves alias.save() to User#save via assignment chain', () => {
    const calls = getRelationships(result, 'CALLS');
    // Positive: alias.save() must resolve to User#save
    const userSave = calls.find(
      (c) =>
        c.target === 'save' &&
        c.source === 'processEntities' &&
        c.targetFilePath.includes('User.java'),
    );
    expect(userSave).toBeDefined();
  });

  it('alias.save() does NOT resolve to Repo#save', () => {
    const calls = getRelationships(result, 'CALLS');
    // Negative: alias comes from User, so only one edge to User.java
    const wrongCall = calls.filter(
      (c) =>
        c.target === 'save' &&
        c.source === 'processEntities' &&
        c.targetFilePath.includes('User.java'),
    );
    expect(wrongCall.length).toBe(1);
  });

  it('resolves rAlias.save() to Repo#save via assignment chain', () => {
    const calls = getRelationships(result, 'CALLS');
    // Positive: rAlias.save() must resolve to Repo#save
    const repoSave = calls.find(
      (c) =>
        c.target === 'save' &&
        c.source === 'processEntities' &&
        c.targetFilePath.includes('Repo.java'),
    );
    expect(repoSave).toBeDefined();
  });

  it('each alias resolves to its own class, not the other', () => {
    const calls = getRelationships(result, 'CALLS');
    const userSave = calls.find(
      (c) =>
        c.target === 'save' &&
        c.source === 'processEntities' &&
        c.targetFilePath.includes('User.java'),
    );
    const repoSave = calls.find(
      (c) =>
        c.target === 'save' &&
        c.source === 'processEntities' &&
        c.targetFilePath.includes('Repo.java'),
    );
    expect(userSave).toBeDefined();
    expect(repoSave).toBeDefined();
    expect(userSave!.targetFilePath).not.toBe(repoSave!.targetFilePath);
  });
});

// ---------------------------------------------------------------------------
// Java Optional<User> receiver resolution — extractSimpleTypeName unwraps
// Optional<User> to "User" via NULLABLE_WRAPPER_TYPES, enabling receiver
// disambiguation when the declaration type is Optional<T>.
// ---------------------------------------------------------------------------

describe('Java Optional<User> receiver resolution via wrapper unwrapping', () => {
  let result: PipelineResult;

  beforeAll(async () => {
    result = await runPipelineFromRepo(path.join(FIXTURES, 'java-optional-receiver'), () => {});
  }, 60000);

  it('detects User and Repo classes each with a save method', () => {
    expect(getNodesByLabel(result, 'Class')).toContain('User');
    expect(getNodesByLabel(result, 'Class')).toContain('Repo');
    const saveMethods = getNodesByLabel(result, 'Method').filter((m) => m === 'save');
    expect(saveMethods.length).toBe(2);
  });

  it('resolves user.save() to User#save with Optional<User> in scope', () => {
    const calls = getRelationships(result, 'CALLS');
    const userSave = calls.find(
      (c) =>
        c.target === 'save' &&
        c.source === 'processEntities' &&
        c.targetFilePath?.includes('User.java'),
    );
    expect(userSave).toBeDefined();
  });

  it('resolves repo.save() to Repo#save alongside Optional usage', () => {
    const calls = getRelationships(result, 'CALLS');
    const repoSave = calls.find(
      (c) =>
        c.target === 'save' &&
        c.source === 'processEntities' &&
        c.targetFilePath?.includes('Repo.java'),
    );
    expect(repoSave).toBeDefined();
  });

  it('disambiguates user.save() and repo.save() to different files', () => {
    const calls = getRelationships(result, 'CALLS');
    const userSave = calls.find(
      (c) =>
        c.target === 'save' &&
        c.source === 'processEntities' &&
        c.targetFilePath?.includes('User.java'),
    );
    const repoSave = calls.find(
      (c) =>
        c.target === 'save' &&
        c.source === 'processEntities' &&
        c.targetFilePath?.includes('Repo.java'),
    );
    expect(userSave).toBeDefined();
    expect(repoSave).toBeDefined();
    expect(userSave!.targetFilePath).not.toBe(repoSave!.targetFilePath);
  });
});

// ---------------------------------------------------------------------------
// Chained method call resolution: svc.getUser().save()
// The receiver of save() is a method_invocation (getUser()), not a simple identifier.
// Resolution must walk the chain: getUser() returns User, so save() → User#save.
// ---------------------------------------------------------------------------

describe('Java chained method call resolution', () => {
  let result: PipelineResult;

  beforeAll(async () => {
    result = await runPipelineFromRepo(path.join(FIXTURES, 'java-chain-call'), () => {});
  }, 60000);

  it('detects User, Repo and UserService classes', () => {
    const classes = getNodesByLabel(result, 'Class');
    expect(classes).toContain('User');
    expect(classes).toContain('Repo');
    expect(classes).toContain('UserService');
  });

  it('detects save methods on both User and Repo', () => {
    const saveMethods = getNodesByLabel(result, 'Method').filter((m) => m === 'save');
    expect(saveMethods.length).toBe(2);
  });

  it('detects getUser method on UserService', () => {
    const methods = getNodesByLabel(result, 'Method');
    expect(methods).toContain('getUser');
  });

  it('resolves svc.getUser().save() to User#save, NOT Repo#save', () => {
    const calls = getRelationships(result, 'CALLS');
    const userSave = calls.find(
      (c) =>
        c.target === 'save' && c.source === 'processUser' && c.targetFilePath.includes('User.java'),
    );
    const repoSave = calls.find(
      (c) =>
        c.target === 'save' && c.source === 'processUser' && c.targetFilePath.includes('Repo.java'),
    );
    expect(userSave).toBeDefined();
    expect(repoSave).toBeUndefined();
  });
});

// ---------------------------------------------------------------------------
// Java 16+ instanceof pattern variable: `if (obj instanceof User user)`
// Phase 5.2: extractPatternBinding on instanceof_expression binds user → User.
// Disambiguation: User.save vs Repo.save — only User.save should be called.
// ---------------------------------------------------------------------------

describe('Java instanceof pattern variable resolution (Phase 5.2)', () => {
  let result: PipelineResult;

  beforeAll(async () => {
    result = await runPipelineFromRepo(path.join(FIXTURES, 'java-instanceof-pattern'), () => {});
  }, 60000);

  it('detects User and Repo classes each with a save method', () => {
    expect(getNodesByLabel(result, 'Class')).toContain('User');
    expect(getNodesByLabel(result, 'Class')).toContain('Repo');
    const saveMethods = getNodesByLabel(result, 'Method').filter((m) => m === 'save');
    expect(saveMethods.length).toBe(2);
  });

  it('resolves user.save() inside if (obj instanceof User user) to User#save', () => {
    const calls = getRelationships(result, 'CALLS');
    const userSave = calls.find(
      (c) =>
        c.target === 'save' && c.source === 'process' && c.targetFilePath.includes('User.java'),
    );
    expect(userSave).toBeDefined();
  });

  it('does NOT resolve user.save() to Repo#save', () => {
    const calls = getRelationships(result, 'CALLS');
    const repoSave = calls.find(
      (c) =>
        c.target === 'save' && c.source === 'process' && c.targetFilePath.includes('Repo.java'),
    );
    expect(repoSave).toBeUndefined();
  });
});

// ---------------------------------------------------------------------------
// Enum static method calls: Status.fromCode(200) should resolve via
// class-as-receiver with Enum type included in the filter.
// ---------------------------------------------------------------------------

describe('Java enum static method call resolution (Phase 5 review fix)', () => {
  let result: PipelineResult;

  beforeAll(async () => {
    result = await runPipelineFromRepo(path.join(FIXTURES, 'java-enum-static-call'), () => {});
  }, 60000);

  it('detects Status as an Enum and App as a Class', () => {
    expect(getNodesByLabel(result, 'Enum')).toContain('Status');
    expect(getNodesByLabel(result, 'Class')).toContain('App');
  });

  it('detects fromCode and label methods on Status', () => {
    const methods = getNodesByLabel(result, 'Method');
    expect(methods).toContain('fromCode');
    expect(methods).toContain('label');
  });

  it('resolves Status.fromCode(200) to Status#fromCode via class-as-receiver', () => {
    const calls = getRelationships(result, 'CALLS');
    const fromCodeCall = calls.find(
      (c) =>
        c.target === 'fromCode' &&
        c.source === 'process' &&
        c.targetFilePath?.includes('Status.java'),
    );
    expect(fromCodeCall).toBeDefined();
  });

  it('resolves s.label() to Status#label', () => {
    const calls = getRelationships(result, 'CALLS');
    const labelCall = calls.find(
      (c) =>
        c.target === 'label' && c.source === 'process' && c.targetFilePath?.includes('Status.java'),
    );
    expect(labelCall).toBeDefined();
  });
});

// ---------------------------------------------------------------------------
// Java 21+ switch pattern matching: switch (obj) { case User user -> user.save(); }
// ---------------------------------------------------------------------------

describe('Java switch pattern binding', () => {
  let result: PipelineResult;

  beforeAll(async () => {
    result = await runPipelineFromRepo(path.join(FIXTURES, 'java-switch-pattern'), () => {});
  }, 60000);

  it('detects User and Repo classes, both with save methods', () => {
    expect(getNodesByLabel(result, 'Class')).toContain('User');
    expect(getNodesByLabel(result, 'Class')).toContain('Repo');
    const saveMethods = getNodesByLabel(result, 'Method').filter((m) => m === 'save');
    expect(saveMethods.length).toBe(2);
  });

  it('resolves user.save() in switch case User to models/User.java', () => {
    const calls = getRelationships(result, 'CALLS');
    const userSave = calls.find(
      (c) =>
        c.target === 'save' && c.source === 'processAny' && c.targetFilePath === 'models/User.java',
    );
    expect(userSave).toBeDefined();
  });

  it('resolves repo.save() in switch case Repo to models/Repo.java', () => {
    const calls = getRelationships(result, 'CALLS');
    const repoSave = calls.find(
      (c) =>
        c.target === 'save' && c.source === 'processAny' && c.targetFilePath === 'models/Repo.java',
    );
    expect(repoSave).toBeDefined();
  });

  it('resolves user.save() in handleUser switch case User to models/User.java', () => {
    const calls = getRelationships(result, 'CALLS');
    const userSave = calls.find(
      (c) =>
        c.target === 'save' && c.source === 'handleUser' && c.targetFilePath === 'models/User.java',
    );
    expect(userSave).toBeDefined();
  });

  it('does NOT cross-resolve handleUser switch case User to Repo.save', () => {
    const calls = getRelationships(result, 'CALLS');
    const wrongSave = calls.find(
      (c) =>
        c.target === 'save' && c.source === 'handleUser' && c.targetFilePath === 'models/Repo.java',
    );
    expect(wrongSave).toBeUndefined();
  });
});

// ---------------------------------------------------------------------------
// Java Map .values() for-loop — method-aware type arg resolution
// ---------------------------------------------------------------------------

describe('Java Map .values() for-loop resolution', () => {
  let result: PipelineResult;

  beforeAll(async () => {
    result = await runPipelineFromRepo(path.join(FIXTURES, 'java-map-keys-values'), () => {});
  }, 60000);

  it('detects User class with save method', () => {
    expect(getNodesByLabel(result, 'Class')).toContain('User');
  });

  it('resolves user.save() via Map.values() to User#save', () => {
    const calls = getRelationships(result, 'CALLS');
    const userSave = calls.find(
      (c) =>
        c.target === 'save' && c.source === 'processValues' && c.targetFilePath?.includes('User'),
    );
    expect(userSave).toBeDefined();
  });

  it('does NOT resolve user.save() to Repo#save (negative)', () => {
    const calls = getRelationships(result, 'CALLS');
    const wrongSave = calls.find(
      (c) =>
        c.target === 'save' && c.source === 'processValues' && c.targetFilePath?.includes('Repo'),
    );
    expect(wrongSave).toBeUndefined();
  });

  it('resolves user.save() via List iteration to User#save', () => {
    const calls = getRelationships(result, 'CALLS');
    const userSave = calls.find(
      (c) =>
        c.target === 'save' && c.source === 'processList' && c.targetFilePath?.includes('User'),
    );
    expect(userSave).toBeDefined();
  });
});

// ---------------------------------------------------------------------------
// Java enhanced for-loop with call_expression iterable: for (User user : getUsers())
// Phase 7.3: call_expression iterable resolution via ReturnTypeLookup
// ---------------------------------------------------------------------------

describe('Java foreach call_expression iterable resolution (Phase 7.3)', () => {
  let result: PipelineResult;

  beforeAll(async () => {
    result = await runPipelineFromRepo(path.join(FIXTURES, 'java-foreach-call-expr'), () => {});
  }, 60000);

  it('detects User and Repo classes with competing save methods', () => {
    expect(getNodesByLabel(result, 'Class')).toContain('User');
    expect(getNodesByLabel(result, 'Class')).toContain('Repo');
  });

  it('resolves user.save() in foreach over User.getUsers() to User#save', () => {
    const calls = getRelationships(result, 'CALLS');
    const userSave = calls.find(
      (c) =>
        c.target === 'save' &&
        c.source === 'processUsers' &&
        c.targetFilePath?.includes('User.java'),
    );
    expect(userSave).toBeDefined();
  });

  it('resolves repo.save() in foreach over Repo.getRepos() to Repo#save', () => {
    const calls = getRelationships(result, 'CALLS');
    const repoSave = calls.find(
      (c) =>
        c.target === 'save' &&
        c.source === 'processRepos' &&
        c.targetFilePath?.includes('Repo.java'),
    );
    expect(repoSave).toBeDefined();
  });

  it('does NOT resolve user.save() to Repo#save (negative)', () => {
    const calls = getRelationships(result, 'CALLS');
    const wrongSave = calls.find(
      (c) =>
        c.target === 'save' &&
        c.source === 'processUsers' &&
        c.targetFilePath?.includes('Repo.java'),
    );
    expect(wrongSave).toBeUndefined();
  });

  it('does NOT resolve repo.save() to User#save (negative)', () => {
    const calls = getRelationships(result, 'CALLS');
    const wrongSave = calls.find(
      (c) =>
        c.target === 'save' &&
        c.source === 'processRepos' &&
        c.targetFilePath?.includes('User.java'),
    );
    expect(wrongSave).toBeUndefined();
  });
});

// ---------------------------------------------------------------------------
// Phase 8: Field/property type resolution (1-level)
// ---------------------------------------------------------------------------

describe('Field type resolution (Java)', () => {
  let result: PipelineResult;

  beforeAll(async () => {
    result = await runPipelineFromRepo(path.join(FIXTURES, 'java-field-types'), () => {});
  }, 60000);

  it('detects classes: Address, App, User', () => {
    expect(getNodesByLabel(result, 'Class')).toEqual(['Address', 'App', 'User']);
  });

  it('detects Property nodes for Java fields', () => {
    const properties = getNodesByLabel(result, 'Property');
    expect(properties).toContain('address');
    expect(properties).toContain('name');
    expect(properties).toContain('city');
  });

  it('emits HAS_PROPERTY edges linking properties to classes', () => {
    const propEdges = getRelationships(result, 'HAS_PROPERTY');
    expect(propEdges.length).toBe(3);
    expect(edgeSet(propEdges)).toContain('User → address');
    expect(edgeSet(propEdges)).toContain('User → name');
    expect(edgeSet(propEdges)).toContain('Address → city');
  });

  it('resolves user.address.save() → Address#save via field type', () => {
    const calls = getRelationships(result, 'CALLS');
    const saveCalls = calls.filter((e) => e.target === 'save');
    const addressSave = saveCalls.find(
      (e) => e.source === 'processUser' && e.targetFilePath.includes('Address'),
    );
    expect(addressSave).toBeDefined();
  });

  it('emits ACCESSES read edge for user.address field access in chain', () => {
    const accesses = getRelationships(result, 'ACCESSES');
    const addressReads = accesses.filter((e) => e.target === 'address' && e.rel.reason === 'read');
    expect(addressReads.length).toBe(1);
    expect(addressReads[0].source).toBe('processUser');
    expect(addressReads[0].targetLabel).toBe('Property');
  });

  it('populates field metadata (visibility, isStatic, declaredType) on Property nodes', () => {
    const properties = getNodesByLabelFull(result, 'Property');

    const city = properties.find((p) => p.name === 'city');
    expect(city).toBeDefined();
    expect(city!.properties.visibility).toBe('public');
    expect(city!.properties.isStatic).toBe(false);
    expect(city!.properties.isReadonly).toBe(false);
    expect(city!.properties.declaredType).toBe('String');

    const addr = properties.find((p) => p.name === 'address');
    expect(addr).toBeDefined();
    expect(addr!.properties.visibility).toBe('public');
    expect(addr!.properties.declaredType).toBe('Address');
  });
});

// ---------------------------------------------------------------------------
// Phase 8A: Deep field chain resolution (3-level)
// ---------------------------------------------------------------------------

describe('Deep field chain resolution (Java)', () => {
  let result: PipelineResult;

  beforeAll(async () => {
    result = await runPipelineFromRepo(path.join(FIXTURES, 'java-deep-field-chain'), () => {});
  }, 60000);

  it('detects classes: Address, App, City, User', () => {
    expect(getNodesByLabel(result, 'Class')).toEqual(['Address', 'App', 'City', 'User']);
  });

  it('detects Property nodes for Java fields', () => {
    const properties = getNodesByLabel(result, 'Property');
    expect(properties).toContain('address');
    expect(properties).toContain('city');
    expect(properties).toContain('zipCode');
  });

  it('emits HAS_PROPERTY edges for nested type chain', () => {
    const propEdges = getRelationships(result, 'HAS_PROPERTY');
    expect(edgeSet(propEdges)).toContain('User → address');
    expect(edgeSet(propEdges)).toContain('Address → city');
    expect(edgeSet(propEdges)).toContain('City → zipCode');
  });

  it('resolves 2-level chain: user.address.save() → Address#save', () => {
    const calls = getRelationships(result, 'CALLS');
    const saveCalls = calls.filter((e) => e.target === 'save' && e.source === 'processUser');
    const addressSave = saveCalls.find((e) => e.targetFilePath.includes('Address'));
    expect(addressSave).toBeDefined();
  });

  it('resolves 3-level chain: user.address.city.getName() → City#getName', () => {
    const calls = getRelationships(result, 'CALLS');
    const getNameCalls = calls.filter((e) => e.target === 'getName' && e.source === 'processUser');
    const cityGetName = getNameCalls.find((e) => e.targetFilePath.includes('City'));
    expect(cityGetName).toBeDefined();
  });
});

// ---------------------------------------------------------------------------
// Mixed field+call chain resolution (Java)
// ---------------------------------------------------------------------------

describe('Mixed field+call chain resolution (Java)', () => {
  let result: PipelineResult;

  beforeAll(async () => {
    result = await runPipelineFromRepo(path.join(FIXTURES, 'java-mixed-chain'), () => {});
  }, 60000);

  it('detects classes: Address, App, City, User, UserService', () => {
    expect(getNodesByLabel(result, 'Class')).toEqual([
      'Address',
      'App',
      'City',
      'User',
      'UserService',
    ]);
  });

  it('detects Property nodes for mixed-chain fields', () => {
    const properties = getNodesByLabel(result, 'Property');
    expect(properties).toContain('city');
    expect(properties).toContain('address');
  });

  it('resolves call→field chain: svc.getUser().address.save() → Address#save', () => {
    const calls = getRelationships(result, 'CALLS');
    const saveCalls = calls.filter((e) => e.target === 'save' && e.source === 'processWithService');
    expect(saveCalls.length).toBe(1);
    expect(saveCalls[0].targetFilePath).toContain('Address');
  });

  it('resolves field→call chain: user.getAddress().city.getName() → City#getName', () => {
    const calls = getRelationships(result, 'CALLS');
    const getNameCalls = calls.filter(
      (e) => e.target === 'getName' && e.source === 'processWithUser',
    );
    expect(getNameCalls.length).toBe(1);
    expect(getNameCalls[0].targetFilePath).toContain('City');
  });
});

// ---------------------------------------------------------------------------
// ACCESSES write edges from assignment expressions
// ---------------------------------------------------------------------------

describe('Write access tracking (Java)', () => {
  let result: PipelineResult;

  beforeAll(async () => {
    result = await runPipelineFromRepo(path.join(FIXTURES, 'java-write-access'), () => {});
  }, 60000);

  it('emits ACCESSES write edges for field assignments', () => {
    const accesses = getRelationships(result, 'ACCESSES');
    const writes = accesses.filter((e) => e.rel.reason === 'write');
    expect(writes.length).toBe(2);
    const nameWrite = writes.find((e) => e.target === 'name');
    const addressWrite = writes.find((e) => e.target === 'address');
    expect(nameWrite).toBeDefined();
    expect(nameWrite!.source).toBe('updateUser');
    expect(addressWrite).toBeDefined();
    expect(addressWrite!.source).toBe('updateUser');
  });
});

// ---------------------------------------------------------------------------
// Call-result variable binding (Phase 9): var user = getUser(); user.save()
// ---------------------------------------------------------------------------

describe('Java call-result variable binding (Tier 2b)', () => {
  let result: PipelineResult;

  beforeAll(async () => {
    result = await runPipelineFromRepo(path.join(FIXTURES, 'java-call-result-binding'), () => {});
  }, 60000);

  it('resolves user.save() to User#save via call-result binding', () => {
    const calls = getRelationships(result, 'CALLS');
    const saveCall = calls.find(
      (c) => c.target === 'save' && c.source === 'processUser' && c.targetFilePath.includes('User'),
    );
    expect(saveCall).toBeDefined();
  });
});

// ---------------------------------------------------------------------------
// Method chain binding (Phase 9C): getUser() → .address → .getCity() → .save()
// ---------------------------------------------------------------------------

describe('Java method chain binding via unified fixpoint (Phase 9C)', () => {
  let result: PipelineResult;

  beforeAll(async () => {
    result = await runPipelineFromRepo(path.join(FIXTURES, 'java-method-chain-binding'), () => {});
  }, 60000);

  it('resolves city.save() to City#save via method chain', () => {
    const calls = getRelationships(result, 'CALLS');
    const saveCall = calls.find(
      (c) =>
        c.target === 'save' && c.source === 'processChain' && c.targetFilePath.includes('Models'),
    );
    expect(saveCall).toBeDefined();
  });
});

// ---------------------------------------------------------------------------
// Phase B: Deep MRO — walkParentChain() at depth 2 (C→B→A)
// greet() is defined on A, accessed via C. Tests BFS depth-2 parent traversal.
// ---------------------------------------------------------------------------

describe('Java grandparent method resolution via MRO (Phase B)', () => {
  let result: PipelineResult;

  beforeAll(async () => {
    result = await runPipelineFromRepo(
      path.join(FIXTURES, 'java-grandparent-resolution'),
      () => {},
    );
  }, 60000);

  it('detects A, B, C, Greeting classes', () => {
    const classes = getNodesByLabel(result, 'Class');
    expect(classes).toContain('A');
    expect(classes).toContain('B');
    expect(classes).toContain('C');
    expect(classes).toContain('Greeting');
  });

  it('emits EXTENDS edges: B→A, C→B', () => {
    const extends_ = getRelationships(result, 'EXTENDS');
    expect(edgeSet(extends_)).toContain('B → A');
    expect(edgeSet(extends_)).toContain('C → B');
  });

  it('resolves c.greet().save() to Greeting#save via depth-2 MRO lookup', () => {
    const calls = getRelationships(result, 'CALLS');
    const saveCall = calls.find(
      (c) => c.target === 'save' && c.targetFilePath.includes('Greeting'),
    );
    expect(saveCall).toBeDefined();
  });

  it('resolves c.greet() to A#greet (method found via MRO walk)', () => {
    const calls = getRelationships(result, 'CALLS');
    const greetCall = calls.find(
      (c) => c.target === 'greet' && c.targetFilePath.includes('A.java'),
    );
    expect(greetCall).toBeDefined();
  });
});

// ── Phase P: Overload Disambiguation via Parameter Types ─────────────────

describe('Java overload disambiguation by parameter types', () => {
  let result: PipelineResult;

  beforeAll(async () => {
    result = await runPipelineFromRepo(path.join(FIXTURES, 'java-overload-param-types'), () => {});
  }, 60000);

  it('produces distinct graph nodes for same-arity overloads via type-hash suffix', () => {
    const methods = getNodesByLabelFull(result, 'Method');
    const lookupNodes = methods.filter((m) => m.name === 'lookup');
    // Type-hash disambiguation → 2 distinct graph nodes (lookup#1~int, lookup#1~String)
    expect(lookupNodes.length).toBe(2);
    const types = lookupNodes.map((n) => n.properties.parameterTypes).sort();
    expect(types).toEqual([['String'], ['int']]);
  });

  it('callById() emits exactly one CALLS edge to lookup(int)', () => {
    const calls = getRelationships(result, 'CALLS');
    const fromCallById = calls.filter((c) => c.source === 'callById' && c.target === 'lookup');
    expect(fromCallById.length).toBe(1);
    const targetNode = result.graph.getNode(fromCallById[0].rel.targetId);
    expect(targetNode?.properties.parameterTypes).toEqual(['int']);
  });

  it('callByName() emits exactly one CALLS edge to lookup(String)', () => {
    const calls = getRelationships(result, 'CALLS');
    const fromCallByName = calls.filter((c) => c.source === 'callByName' && c.target === 'lookup');
    expect(fromCallByName.length).toBe(1);
    const targetNode = result.graph.getNode(fromCallByName[0].rel.targetId);
    expect(targetNode?.properties.parameterTypes).toEqual(['String']);
  });
});

// ── Phase P: Same-arity overloads — cross-file + chain resolution ─────────

describe('Java same-arity overload cross-file and chain resolution', () => {
  let result: PipelineResult;

  beforeAll(async () => {
    result = await runPipelineFromRepo(path.join(FIXTURES, 'java-same-arity-cross-file'), () => {});
  }, 60000);

  // -- Cross-file: caller in App.java → overloaded method in DbLookup.java --

  it('crossFileById() emits exactly one CALLS edge to find(int) in DbLookup', () => {
    const calls = getRelationships(result, 'CALLS');
    const edges = calls.filter(
      (c) =>
        c.source === 'crossFileById' &&
        c.target === 'find' &&
        c.targetFilePath.includes('DbLookup'),
    );
    expect(edges.length).toBe(1);
    const targetNode = result.graph.getNode(edges[0].rel.targetId);
    expect(targetNode?.properties.parameterTypes).toEqual(['int']);
  });

  it('crossFileByName() emits exactly one CALLS edge to find(String) in DbLookup', () => {
    const calls = getRelationships(result, 'CALLS');
    const edges = calls.filter(
      (c) =>
        c.source === 'crossFileByName' &&
        c.target === 'find' &&
        c.targetFilePath.includes('DbLookup'),
    );
    expect(edges.length).toBe(1);
    const targetNode = result.graph.getNode(edges[0].rel.targetId);
    expect(targetNode?.properties.parameterTypes).toEqual(['String']);
  });

  // -- METHOD_IMPLEMENTS: DbLookup.find(int) → ILookup.find(int) etc. --

  it('emits METHOD_IMPLEMENTS from DbLookup.find(int) → ILookup.find(int)', () => {
    const mi = getRelationships(result, 'METHOD_IMPLEMENTS');
    const edges = mi.filter(
      (e) =>
        e.source === 'find' &&
        e.target === 'find' &&
        e.sourceFilePath.includes('DbLookup') &&
        e.targetFilePath.includes('ILookup'),
    );
    // Two distinct edges: find(int)→find(int) and find(String)→find(String)
    expect(edges.length).toBe(2);
    for (const edge of edges) {
      const sourceNode = result.graph.getNode(edge.rel.sourceId);
      const targetNode = result.graph.getNode(edge.rel.targetId);
      expect(sourceNode?.properties.parameterTypes).toEqual(targetNode?.properties.parameterTypes);
    }
  });

  // -- Chain: db.find(42) → result → fmt.format(result) --

  it('chainIntToFormat() calls find and format — each resolves to exactly one overload', () => {
    const calls = getRelationships(result, 'CALLS');
    const findEdges = calls.filter((c) => c.source === 'chainIntToFormat' && c.target === 'find');
    const formatEdges = calls.filter(
      (c) => c.source === 'chainIntToFormat' && c.target === 'format',
    );
    // find(42) → find(int)
    expect(findEdges.length).toBe(1);
    const findTarget = result.graph.getNode(findEdges[0].rel.targetId);
    expect(findTarget?.properties.parameterTypes).toEqual(['int']);
    // format(result) where result is String → format(String)
    expect(formatEdges.length).toBe(1);
    const formatTarget = result.graph.getNode(formatEdges[0].rel.targetId);
    expect(formatTarget?.properties.parameterTypes).toEqual(['String']);
  });

  it('chainNameToFormat() calls find and format — each resolves to exactly one overload', () => {
    const calls = getRelationships(result, 'CALLS');
    const findEdges = calls.filter((c) => c.source === 'chainNameToFormat' && c.target === 'find');
    const formatEdges = calls.filter(
      (c) => c.source === 'chainNameToFormat' && c.target === 'format',
    );
    // find("alice") → find(String)
    expect(findEdges.length).toBe(1);
    const findTarget = result.graph.getNode(findEdges[0].rel.targetId);
    expect(findTarget?.properties.parameterTypes).toEqual(['String']);
    // format(result) where result is String → format(String)
    expect(formatEdges.length).toBe(1);
    const formatTarget = result.graph.getNode(formatEdges[0].rel.targetId);
    expect(formatTarget?.properties.parameterTypes).toEqual(['String']);
  });
});

// ── Phase P: Virtual Dispatch via Constructor Type ───────────────────────

describe('Java virtual dispatch via constructor type (same-file)', () => {
  let result: PipelineResult;

  beforeAll(async () => {
    result = await runPipelineFromRepo(path.join(FIXTURES, 'java-virtual-dispatch'), () => {});
  }, 60000);

  it('detects Animal, Dog, and App classes in same file', () => {
    const classes = getNodesByLabel(result, 'Class');
    expect(classes).toContain('Animal');
    expect(classes).toContain('Dog');
    expect(classes).toContain('App');
  });

  it('detects Dog extends Animal heritage', () => {
    const extends_ = getRelationships(result, 'EXTENDS');
    const dogExtends = extends_.find((e) => e.source === 'Dog' && e.target === 'Animal');
    expect(dogExtends).toBeDefined();
  });

  it('detects fetchBall() as Dog-only method', () => {
    const methods = getNodesByLabel(result, 'Method');
    expect(methods).toContain('fetchBall');
  });

  it('resolves fetchBall() calls from run() — proves virtual dispatch override', () => {
    const calls = getRelationships(result, 'CALLS');
    const fetchCalls = calls.filter((c) => c.source === 'run' && c.target === 'fetchBall');
    // animal.fetchBall() only resolves if constructorTypeMap overrides
    // receiver from Animal → Dog (since only Dog has fetchBall).
    // dog.fetchBall() resolves directly via Dog type.
    // Both target same nodeId → 1 CALLS edge after dedup.
    expect(fetchCalls.length).toBe(1);
  });
});

// ---------------------------------------------------------------------------
// Phase 14: Cross-file binding propagation
// models/UserFactory.java exports static getUser() returning User
// app/App.java static-imports getUser, calls var user = getUser(); user.save()
// → user is typed User via cross-file return type propagation
// ---------------------------------------------------------------------------

describe('Java cross-file binding propagation', () => {
  let result: PipelineResult;

  beforeAll(async () => {
    result = await runPipelineFromRepo(path.join(CROSS_FILE_FIXTURES, 'java-cross-file'), () => {});
  }, 60000);

  it('detects User class with save and getName methods', () => {
    expect(getNodesByLabel(result, 'Class')).toContain('User');
    expect(getNodesByLabel(result, 'Method')).toContain('save');
    expect(getNodesByLabel(result, 'Method')).toContain('getName');
  });

  it('detects UserFactory class with getUser method', () => {
    expect(getNodesByLabel(result, 'Class')).toContain('UserFactory');
    expect(getNodesByLabel(result, 'Method')).toContain('getUser');
  });

  it('detects App class with run method', () => {
    expect(getNodesByLabel(result, 'Class')).toContain('App');
    expect(getNodesByLabel(result, 'Method')).toContain('run');
  });

  it('emits IMPORTS edge from App.java to UserFactory.java', () => {
    const imports = getRelationships(result, 'IMPORTS');
    const edge = imports.find(
      (e) => e.sourceFilePath.includes('App') && e.targetFilePath.includes('UserFactory'),
    );
    expect(edge).toBeDefined();
  });

  it('resolves user.save() in run() to User#save via cross-file return type propagation', () => {
    const calls = getRelationships(result, 'CALLS');
    const saveCall = calls.find(
      (c) => c.target === 'save' && c.source === 'run' && c.targetFilePath.includes('User.java'),
    );
    expect(saveCall).toBeDefined();
  });

  it('resolves user.getName() in run() to User#getName via cross-file return type propagation', () => {
    const calls = getRelationships(result, 'CALLS');
    const getNameCall = calls.find(
      (c) => c.target === 'getName' && c.source === 'run' && c.targetFilePath.includes('User.java'),
    );
    expect(getNameCall).toBeDefined();
  });

  it('emits HAS_METHOD edges linking save and getName to User', () => {
    const hasMethod = getRelationships(result, 'HAS_METHOD');
    const saveEdge = hasMethod.find((e) => e.source === 'User' && e.target === 'save');
    const getNameEdge = hasMethod.find((e) => e.source === 'User' && e.target === 'getName');
    expect(saveEdge).toBeDefined();
    expect(getNameEdge).toBeDefined();
  });
});

// ---------------------------------------------------------------------------
// Method enrichment: abstract, static, annotations, parameterTypes
// ---------------------------------------------------------------------------

describe('Java method enrichment', () => {
  let result: PipelineResult;

  beforeAll(async () => {
    result = await runPipelineFromRepo(path.join(FIXTURES, 'java-method-enrichment'), () => {});
  }, 60000);

  it('detects Animal and Dog classes', () => {
    const classes = getNodesByLabel(result, 'Class');
    expect(classes).toContain('Animal');
    expect(classes).toContain('Dog');
  });

  it('emits HAS_METHOD edges for Animal methods', () => {
    const hasMethod = getRelationships(result, 'HAS_METHOD');
    const animalMethods = hasMethod.filter((e) => e.source === 'Animal').map((e) => e.target);
    expect(animalMethods).toContain('speak');
    expect(animalMethods).toContain('classify');
    expect(animalMethods).toContain('breathe');
  });

  it('emits HAS_METHOD edge for Dog.speak', () => {
    const hasMethod = getRelationships(result, 'HAS_METHOD');
    const dogSpeak = hasMethod.find((e) => e.source === 'Dog' && e.target === 'speak');
    expect(dogSpeak).toBeDefined();
  });

  it('emits EXTENDS edge Dog -> Animal', () => {
    const extends_ = getRelationships(result, 'EXTENDS');
    const dogExtends = extends_.find((e) => e.source === 'Dog' && e.target === 'Animal');
    expect(dogExtends).toBeDefined();
  });

  it('marks abstract speak as isAbstract (conditional)', () => {
    const methods = getNodesByLabelFull(result, 'Function');
    const speak = methods.find(
      (n) => n.name === 'speak' && n.properties.filePath?.includes('Animal.java'),
    );
    if (speak?.properties.isAbstract !== undefined) {
      expect(speak.properties.isAbstract).toBe(true);
    }
  });

  it('marks breathe as NOT isAbstract (conditional)', () => {
    const methods = getNodesByLabelFull(result, 'Function');
    const breathe = methods.find((n) => n.name === 'breathe');
    if (breathe?.properties.isAbstract !== undefined) {
      expect(breathe.properties.isAbstract).toBe(false);
    }
  });

  it('marks classify as isStatic (conditional)', () => {
    const methods = getNodesByLabelFull(result, 'Function');
    const classify = methods.find((n) => n.name === 'classify');
    if (classify?.properties.isStatic !== undefined) {
      expect(classify.properties.isStatic).toBe(true);
    }
  });

  it('marks breathe as NOT isStatic (conditional)', () => {
    const methods = getNodesByLabelFull(result, 'Function');
    const breathe = methods.find((n) => n.name === 'breathe');
    if (breathe?.properties.isStatic !== undefined) {
      expect(breathe.properties.isStatic).toBe(false);
    }
  });

  it('captures @Override annotation on Dog.speak (conditional)', () => {
    const methods = getNodesByLabelFull(result, 'Function');
    const dogSpeak = methods.find(
      (n) => n.name === 'speak' && n.properties.annotations?.includes('@Override'),
    );
    if (dogSpeak) {
      expect(dogSpeak.properties.annotations).toContain('@Override');
    }
  });

  it('populates parameterTypes for classify (conditional)', () => {
    const methods = getNodesByLabelFull(result, 'Function');
    const classify = methods.find((n) => n.name === 'classify');
    if (classify?.properties.parameterTypes !== undefined) {
      expect(classify.properties.parameterTypes).toContain('String');
    }
  });

  it('resolves dog.speak() CALLS edge', () => {
    const calls = getRelationships(result, 'CALLS');
    const speakCall = calls.find(
      (c) => c.target === 'speak' && c.sourceFilePath.includes('App.java'),
    );
    expect(speakCall).toBeDefined();
  });

  it('resolves Animal.classify() static CALLS edge', () => {
    const calls = getRelationships(result, 'CALLS');
    const classifyCall = calls.find(
      (c) => c.target === 'classify' && c.sourceFilePath.includes('App.java'),
    );
    expect(classifyCall).toBeDefined();
  });
});

// ---------------------------------------------------------------------------
// Java interface dispatch (METHOD_IMPLEMENTS)
// Action interface: execute(), priority()
// LogEvent implements Action, SendEmail implements Action
// ---------------------------------------------------------------------------

describe('Java interface dispatch (METHOD_IMPLEMENTS)', () => {
  let result: PipelineResult;

  beforeAll(async () => {
    result = await runPipelineFromRepo(path.join(FIXTURES, 'java-interface-dispatch'), () => {});
  }, 60000);

  it('emits METHOD_IMPLEMENTS edges from LogEvent.execute → Action.execute', () => {
    const mi = getRelationships(result, 'METHOD_IMPLEMENTS');
    const edge = mi.find(
      (e) =>
        e.source === 'execute' &&
        e.target === 'execute' &&
        e.sourceFilePath.includes('LogEvent') &&
        e.targetFilePath.includes('Action'),
    );
    expect(edge).toBeDefined();
  });

  it('emits METHOD_IMPLEMENTS edges from SendEmail.execute → Action.execute', () => {
    const mi = getRelationships(result, 'METHOD_IMPLEMENTS');
    const edge = mi.find(
      (e) =>
        e.source === 'execute' &&
        e.target === 'execute' &&
        e.sourceFilePath.includes('SendEmail') &&
        e.targetFilePath.includes('Action'),
    );
    expect(edge).toBeDefined();
  });

  it('emits METHOD_IMPLEMENTS for priority() in both implementors', () => {
    const mi = getRelationships(result, 'METHOD_IMPLEMENTS');
    const priorityEdges = mi.filter(
      (e) =>
        e.source === 'priority' && e.target === 'priority' && e.targetFilePath.includes('Action'),
    );
    expect(priorityEdges.length).toBe(2);
    const sourceFiles = priorityEdges.map((e) => e.sourceFilePath).sort();
    expect(sourceFiles.some((f) => f.includes('LogEvent'))).toBe(true);
    expect(sourceFiles.some((f) => f.includes('SendEmail'))).toBe(true);
  });
});

// ---------------------------------------------------------------------------
// Java overloaded method disambiguation (METHOD_IMPLEMENTS with arity)
// Repository interface: find(int), find(String, boolean), save(String)
// SqlRepository implements Repository with matching overloads
// ---------------------------------------------------------------------------

describe('Java overloaded method disambiguation (METHOD_IMPLEMENTS)', () => {
  let result: PipelineResult;

  beforeAll(async () => {
    result = await runPipelineFromRepo(path.join(FIXTURES, 'java-overload-dispatch'), () => {});
  }, 60000);

  it('detects distinct Method nodes for overloaded find methods on SqlRepository', () => {
    const methods = getNodesByLabelFull(result, 'Method');
    const findMethods = methods.filter(
      (m) => m.name === 'find' && m.properties.filePath?.includes('SqlRepository'),
    );
    expect(findMethods.length).toBe(2);
    const paramCounts = findMethods.map((m) => m.properties.parameterCount).sort();
    expect(paramCounts).toEqual([1, 2]);
  });

  it('detects distinct Method nodes for overloaded find methods on Repository interface', () => {
    const methods = getNodesByLabelFull(result, 'Method');
    const findMethods = methods.filter(
      (m) =>
        m.name === 'find' &&
        m.properties.filePath?.includes('Repository') &&
        !m.properties.filePath?.includes('SqlRepository'),
    );
    expect(findMethods.length).toBe(2);
    const paramCounts = findMethods.map((m) => m.properties.parameterCount).sort();
    expect(paramCounts).toEqual([1, 2]);
  });

  it('emits METHOD_IMPLEMENTS for find(int) → Repository.find(int)', () => {
    const mi = getRelationships(result, 'METHOD_IMPLEMENTS');
    const edge = mi.find(
      (e) =>
        e.source === 'find' &&
        e.target === 'find' &&
        e.sourceFilePath.includes('SqlRepository') &&
        e.targetFilePath.includes('Repository'),
    );
    expect(edge).toBeDefined();
    // Verify at least one find→find edge has arity 1 on source side
    const findEdges = mi.filter(
      (e) =>
        e.source === 'find' &&
        e.target === 'find' &&
        e.sourceFilePath.includes('SqlRepository') &&
        e.targetFilePath.includes('Repository'),
    );
    const sourceNodes = findEdges.map((e) => {
      const methods = getNodesByLabelFull(result, 'Method');
      return methods.find(
        (m) =>
          m.name === 'find' &&
          m.properties.filePath?.includes('SqlRepository') &&
          m.properties.parameterCount === 1,
      );
    });
    expect(sourceNodes.some((n) => n !== undefined)).toBe(true);
  });

  it('emits METHOD_IMPLEMENTS for find(String, boolean) → Repository.find(String, boolean)', () => {
    const mi = getRelationships(result, 'METHOD_IMPLEMENTS');
    const findEdges = mi.filter(
      (e) =>
        e.source === 'find' &&
        e.target === 'find' &&
        e.sourceFilePath.includes('SqlRepository') &&
        e.targetFilePath.includes('Repository'),
    );
    // There should be two find→find edges (one per overload)
    expect(findEdges.length).toBe(2);
  });

  it('emits METHOD_IMPLEMENTS for save(String) → Repository.save(String)', () => {
    const mi = getRelationships(result, 'METHOD_IMPLEMENTS');
    const edge = mi.find(
      (e) =>
        e.source === 'save' &&
        e.target === 'save' &&
        e.sourceFilePath.includes('SqlRepository') &&
        e.targetFilePath.includes('Repository'),
    );
    expect(edge).toBeDefined();
  });

  it('emits exactly 3 METHOD_IMPLEMENTS edges', () => {
    const mi = getRelationships(result, 'METHOD_IMPLEMENTS');
    const edges = mi.filter(
      (e) => e.sourceFilePath.includes('SqlRepository') && e.targetFilePath.includes('Repository'),
    );
    expect(edges.length).toBe(3);
  });

  it('emits CALLS edges from run() to both find overloads', () => {
    const calls = getRelationships(result, 'CALLS');
    const findCalls = calls.filter(
      (c) =>
        c.source === 'run' &&
        c.target === 'find' &&
        c.sourceFilePath.includes('App') &&
        c.targetFilePath.includes('SqlRepository'),
    );
    expect(findCalls.length).toBe(2);
  });
});

// ── Phase P: Sequential path parity — same-arity overloads ────────────────

describe('Java same-arity overloads via sequential path (skipWorkers)', () => {
  let result: PipelineResult;

  beforeAll(async () => {
    result = await runPipelineFromRepo(
      path.join(FIXTURES, 'java-same-arity-cross-file'),
      () => {},
      { skipWorkers: true },
    );
  }, 60000);

  it('produces distinct graph nodes for find(int) and find(String) — sequential path', () => {
    const methods = getNodesByLabelFull(result, 'Method');
    const findNodes = methods.filter(
      (m) => m.name === 'find' && m.properties.filePath?.includes('DbLookup'),
    );
    expect(findNodes.length).toBe(2);
    const types = findNodes.map((n) => n.properties.parameterTypes).sort();
    expect(types).toEqual([['String'], ['int']]);
  });

  it('crossFileById() → find(int) — sequential path', () => {
    const calls = getRelationships(result, 'CALLS');
    const edges = calls.filter(
      (c) =>
        c.source === 'crossFileById' &&
        c.target === 'find' &&
        c.targetFilePath.includes('DbLookup'),
    );
    expect(edges.length).toBe(1);
    const targetNode = result.graph.getNode(edges[0].rel.targetId);
    expect(targetNode?.properties.parameterTypes).toEqual(['int']);
  });

  it('crossFileByName() → find(String) — sequential path', () => {
    const calls = getRelationships(result, 'CALLS');
    const edges = calls.filter(
      (c) =>
        c.source === 'crossFileByName' &&
        c.target === 'find' &&
        c.targetFilePath.includes('DbLookup'),
    );
    expect(edges.length).toBe(1);
    const targetNode = result.graph.getNode(edges[0].rel.targetId);
    expect(targetNode?.properties.parameterTypes).toEqual(['String']);
  });

  it('METHOD_IMPLEMENTS edges match interface methods — sequential path', () => {
    const mi = getRelationships(result, 'METHOD_IMPLEMENTS');
    const edges = mi.filter(
      (e) =>
        e.source === 'find' &&
        e.target === 'find' &&
        e.sourceFilePath.includes('DbLookup') &&
        e.targetFilePath.includes('ILookup'),
    );
    expect(edges.length).toBe(2);
    for (const edge of edges) {
      const sourceNode = result.graph.getNode(edge.rel.sourceId);
      const targetNode = result.graph.getNode(edge.rel.targetId);
      expect(sourceNode?.properties.parameterTypes).toEqual(targetNode?.properties.parameterTypes);
    }
  });
});

// ---------------------------------------------------------------------------
// Cross-class pure method chain resolution via lookupMethodByOwner (#575)
// ---------------------------------------------------------------------------

describe('Cross-class method chain resolution (Java) — #575', () => {
  let result: PipelineResult;

  beforeAll(async () => {
    result = await runPipelineFromRepo(
      path.join(FIXTURES, 'java-method-chain-cross-class'),
      () => {},
    );
  }, 60000);

  it('detects classes: Address, App, City, User', () => {
    expect(getNodesByLabel(result, 'Class')).toEqual(['Address', 'App', 'City', 'User']);
  });

  it('two-step chain: user.getAddress().save() → Address#save', () => {
    const calls = getRelationships(result, 'CALLS');
    const saveCalls = calls.filter((e) => e.target === 'save' && e.source === 'twoStepChain');
    expect(saveCalls.length).toBe(1);
    expect(saveCalls[0].targetFilePath).toContain('Address');
  });

  it('two-step chain: user.getAddress().save() also emits CALLS to User#getAddress', () => {
    const calls = getRelationships(result, 'CALLS');
    const getAddressCalls = calls.filter(
      (e) => e.target === 'getAddress' && e.source === 'twoStepChain',
    );
    expect(getAddressCalls.length).toBe(1);
    expect(getAddressCalls[0].targetFilePath).toContain('User');
  });

  it('three-step chain: user.getAddress().getCity().getZipCode() → City#getZipCode', () => {
    const calls = getRelationships(result, 'CALLS');
    const zipCalls = calls.filter(
      (e) => e.target === 'getZipCode' && e.source === 'threeStepChain',
    );
    expect(zipCalls.length).toBe(1);
    expect(zipCalls[0].targetFilePath).toContain('City');
  });

  it('three-step chain emits CALLS for all intermediate steps', () => {
    const calls = getRelationships(result, 'CALLS');
    const threeStepCalls = calls.filter((e) => e.source === 'threeStepChain');
    const targets = threeStepCalls.map((e) => e.target).sort();
    expect(targets).toContain('getAddress');
    expect(targets).toContain('getCity');
    expect(targets).toContain('getZipCode');
  });

  it('mixed chain: user.getAddress().city.getZipCode() → City#getZipCode', () => {
    const calls = getRelationships(result, 'CALLS');
    const zipCalls = calls.filter((e) => e.target === 'getZipCode' && e.source === 'mixedChain');
    expect(zipCalls.length).toBe(1);
    expect(zipCalls[0].targetFilePath).toContain('City');
  });

  it('mixed chain emits ACCESSES edge for field step: .city on Address', () => {
    const accesses = getRelationships(result, 'ACCESSES');
    const cityAccess = accesses.filter((e) => e.target === 'city' && e.source === 'mixedChain');
    expect(cityAccess.length).toBe(1);
  });
});

// ---------------------------------------------------------------------------
// SM-9: lookupMethodByOwnerWithMRO — class Child extends Parent
// child.parentMethod() resolves to Parent#parentMethod via MRO parent walk.
// ---------------------------------------------------------------------------

describe('Java Child extends Parent — inherited method resolution (SM-9)', () => {
  let result: PipelineResult;

  beforeAll(async () => {
    result = await runPipelineFromRepo(path.join(FIXTURES, 'java-child-extends-parent'), () => {});
  }, 60000);

  it('detects Parent and Child classes', () => {
    const classes = getNodesByLabel(result, 'Class');
    expect(classes).toContain('Parent');
    expect(classes).toContain('Child');
  });

  it('emits EXTENDS edge: Child → Parent', () => {
    const extends_ = getRelationships(result, 'EXTENDS');
    expect(edgeSet(extends_)).toContain('Child → Parent');
  });

  it('resolves c.parentMethod() to Parent#parentMethod via MRO walk', () => {
    const calls = getRelationships(result, 'CALLS');
    const parentMethodCall = calls.find(
      (c) => c.target === 'parentMethod' && c.targetFilePath.includes('Parent'),
    );
    expect(parentMethodCall).toBeDefined();
    // Pin the caller too — not just the target — so a regression that
    // misattributes the edge to a different source would fail loudly.
    expect(parentMethodCall!.source).toBe('run');
  });
});

// ---------------------------------------------------------------------------
// SM-11: Java User implements Validator — interface default method (Java 8+)
// ---------------------------------------------------------------------------

describe('Java User implements Validator — interface default method (SM-11)', () => {
  let result: PipelineResult;

  beforeAll(async () => {
    result = await runPipelineFromRepo(
      path.join(FIXTURES, 'java-interface-default-method'),
      () => {},
    );
  }, 60000);

  it('detects Validator interface and User class', () => {
    expect(getNodesByLabel(result, 'Interface')).toContain('Validator');
    expect(getNodesByLabel(result, 'Class')).toContain('User');
  });

  it('emits IMPLEMENTS edge: User → Validator', () => {
    const impls = getRelationships(result, 'IMPLEMENTS');
    expect(edgeSet(impls)).toContain('User → Validator');
  });

  it('resolves user.validate() to Validator.validate via implements-split MRO', () => {
    const calls = getRelationships(result, 'CALLS');
    const validateCall = calls.find(
      (c) => c.target === 'validate' && c.targetFilePath.includes('Validator.java'),
    );
    expect(validateCall).toBeDefined();
    expect(validateCall!.source).toBe('run');
  });
});
