/**
 * WASM MCP Server Capability Tests
 * Tests all WASM capabilities: MCP server, gallery, RVF builder, IndexedDB persistence
 *
 * Run with: npx vitest run src/lib/wasm/tests/wasm-capabilities.test.ts
 */

import { describe, it, expect, beforeAll, afterAll, vi } from "vitest";

// Mock browser environment
vi.mock("$app/environment", () => ({
	browser: true,
}));

// Mock IndexedDB for Node environment
const mockIDB = {
	files: new Map<string, { path: string; content: string; createdAt: number; updatedAt: number }>(),
	settings: new Map<string, unknown>(),
	rvfContainers: new Map<string, { id: string; name: string; data: Uint8Array }>(),
};

vi.mock("$lib/wasm/idb", () => ({
	writeFile: vi.fn(async (path: string, content: string) => {
		const now = Date.now();
		mockIDB.files.set(path, { path, content, createdAt: now, updatedAt: now });
	}),
	readFile: vi.fn(async (path: string) => {
		return mockIDB.files.get(path)?.content ?? null;
	}),
	deleteFile: vi.fn(async (path: string) => {
		mockIDB.files.delete(path);
	}),
	listFiles: vi.fn(async () => {
		return Array.from(mockIDB.files.values());
	}),
	clearFiles: vi.fn(async () => {
		mockIDB.files.clear();
	}),
	getSetting: vi.fn(async <T>(key: string): Promise<T | null> => {
		return (mockIDB.settings.get(key) as T) ?? null;
	}),
	setSetting: vi.fn(async <T>(key: string, value: T) => {
		mockIDB.settings.set(key, value);
	}),
	saveRvfContainer: vi.fn(async (id: string, name: string, data: Uint8Array) => {
		mockIDB.rvfContainers.set(id, { id, name, data });
	}),
	loadRvfContainer: vi.fn(async (id: string) => {
		return mockIDB.rvfContainers.get(id) ?? null;
	}),
	listRvfContainers: vi.fn(async () => {
		return Array.from(mockIDB.rvfContainers.values());
	}),
	deleteRvfContainer: vi.fn(async (id: string) => {
		mockIDB.rvfContainers.delete(id);
	}),
	openDatabase: vi.fn(async () => ({})),
	closeDatabase: vi.fn(() => {}),
}));

describe("WASM MCP Server Capabilities", () => {
	describe("Type Definitions", () => {
		it("should export correct GalleryTemplate interface", async () => {
			const template = {
				id: "test-template",
				name: "Test Template",
				description: "A test template",
				category: "development",
				version: "1.0.0",
				author: "test",
				tags: ["test", "development"],
				builtin: true,
				tools: [],
				prompts: [],
				skills: [],
				mcp_tools: [],
				capabilities: [],
			};

			expect(template).toHaveProperty("id");
			expect(template).toHaveProperty("name");
			expect(template).toHaveProperty("category");
			expect(template).toHaveProperty("builtin");
		});

		it("should export correct SearchResult interface", () => {
			const result = {
				id: "test-id",
				name: "Test",
				description: "Test description",
				category: "testing",
				tags: ["test"],
				relevance: 0.95,
			};

			expect(result.relevance).toBeGreaterThanOrEqual(0);
			expect(result.relevance).toBeLessThanOrEqual(1);
		});

		it("should export correct MCPTool interface", () => {
			const tool = {
				name: "read_file",
				description: "Read a file from the virtual filesystem",
				inputSchema: {
					type: "object",
					properties: {
						path: { type: "string", description: "File path to read" },
					},
					required: ["path"],
				},
			};

			expect(tool).toHaveProperty("name");
			expect(tool).toHaveProperty("inputSchema");
		});
	});

	describe("IndexedDB Persistence Layer", () => {
		beforeAll(() => {
			mockIDB.files.clear();
			mockIDB.settings.clear();
			mockIDB.rvfContainers.clear();
		});

		it("should write and read files", async () => {
			const { writeFile, readFile } = await import("$lib/wasm/idb");

			await writeFile("/test/hello.txt", "Hello, World!");
			const content = await readFile("/test/hello.txt");

			expect(content).toBe("Hello, World!");
		});

		it("should list all files", async () => {
			const { writeFile, listFiles } = await import("$lib/wasm/idb");

			await writeFile("/test/file1.txt", "content1");
			await writeFile("/test/file2.txt", "content2");

			const files = await listFiles();
			expect(files.length).toBeGreaterThanOrEqual(2);
		});

		it("should delete files", async () => {
			const { writeFile, readFile, deleteFile } = await import("$lib/wasm/idb");

			await writeFile("/test/to-delete.txt", "delete me");
			await deleteFile("/test/to-delete.txt");
			const content = await readFile("/test/to-delete.txt");

			expect(content).toBeNull();
		});

		it("should save and load settings", async () => {
			const { setSetting, getSetting } = await import("$lib/wasm/idb");

			await setSetting("testKey", { value: 42 });
			const setting = await getSetting<{ value: number }>("testKey");

			expect(setting).toEqual({ value: 42 });
		});

		it("should save and load RVF containers", async () => {
			const { saveRvfContainer, loadRvfContainer } = await import("$lib/wasm/idb");

			const testData = new Uint8Array([0x52, 0x56, 0x46, 0x00]); // "RVF\0"
			await saveRvfContainer("test-rvf", "Test Container", testData);
			const container = await loadRvfContainer("test-rvf");

			expect(container).not.toBeNull();
			expect(container?.name).toBe("Test Container");
			expect(container?.data).toEqual(testData);
		});

		it("should list RVF containers", async () => {
			const { listRvfContainers } = await import("$lib/wasm/idb");

			const containers = await listRvfContainers();
			expect(containers.length).toBeGreaterThanOrEqual(1);
		});
	});

	describe("MCP Server Protocol", () => {
		it("should validate JSON-RPC request format", () => {
			const request = {
				jsonrpc: "2.0",
				id: 1,
				method: "tools/list",
				params: {},
			};

			expect(request.jsonrpc).toBe("2.0");
			expect(typeof request.id).toBe("number");
			expect(request.method).toBe("tools/list");
		});

		it("should validate JSON-RPC response format", () => {
			const successResponse = {
				jsonrpc: "2.0",
				id: 1,
				result: { tools: [] },
			};

			const errorResponse = {
				jsonrpc: "2.0",
				id: 2,
				error: { code: -32600, message: "Invalid Request" },
			};

			expect(successResponse.result).toBeDefined();
			expect(errorResponse.error.code).toBe(-32600);
		});

		it("should define expected MCP methods", () => {
			const expectedMethods = [
				"initialize",
				"tools/list",
				"tools/call",
				"prompts/list",
				"prompts/get",
				"resources/list",
				"resources/read",
				"gallery/list",
				"gallery/load",
				"gallery/search",
			];

			expectedMethods.forEach((method) => {
				expect(typeof method).toBe("string");
				expect(method.length).toBeGreaterThan(0);
			});
		});
	});

	describe("Gallery Template Structure", () => {
		it("should define valid template categories", () => {
			const validCategories = [
				"development",
				"research",
				"testing",
				"security",
				"orchestration",
				"documentation",
				"devops",
				"custom",
			];

			validCategories.forEach((category) => {
				expect(typeof category).toBe("string");
			});
		});

		it("should validate tool definition structure", () => {
			const tool = {
				name: "write_file",
				description: "Write content to a file",
				parameters: {
					type: "object",
					properties: {
						path: { type: "string" },
						content: { type: "string" },
					},
					required: ["path", "content"],
				},
				returns: "boolean",
			};

			expect(tool.parameters.type).toBe("object");
			expect(tool.parameters.required).toContain("path");
			expect(tool.parameters.required).toContain("content");
		});

		it("should validate prompt definition structure", () => {
			const prompt = {
				name: "code-review",
				system_prompt: "You are a senior code reviewer...",
				version: "1.0.0",
			};

			expect(prompt.name).toBeTruthy();
			expect(prompt.system_prompt.length).toBeGreaterThan(0);
		});

		it("should validate skill definition structure", () => {
			const skill = {
				name: "git-commit",
				description: "Create a git commit with conventional format",
				trigger: "/commit",
				content: "When the user types /commit...",
			};

			expect(skill.trigger).toMatch(/^\//);
		});

		it("should validate orchestrator configuration", () => {
			const orchestrator = {
				topology: "hierarchical",
				agents: [
					{ id: "coordinator", agent_type: "planner", prompt_ref: "coordinator" },
					{ id: "coder", agent_type: "coder", prompt_ref: "coder" },
					{ id: "reviewer", agent_type: "reviewer", prompt_ref: "reviewer" },
				],
				connections: [
					["coordinator", "coder"],
					["coordinator", "reviewer"],
					["coder", "reviewer"],
				],
			};

			expect(orchestrator.topology).toBe("hierarchical");
			expect(orchestrator.agents.length).toBe(3);
			expect(orchestrator.connections.length).toBe(3);
		});
	});

	describe("RVF Container Format", () => {
		it("should define RVF magic bytes", () => {
			const RVF_MAGIC = new Uint8Array([0x52, 0x56, 0x46, 0x00]); // "RVF\0"
			expect(RVF_MAGIC[0]).toBe(0x52); // 'R'
			expect(RVF_MAGIC[1]).toBe(0x56); // 'V'
			expect(RVF_MAGIC[2]).toBe(0x46); // 'F'
			expect(RVF_MAGIC[3]).toBe(0x00); // null terminator
		});

		it("should validate RVF version format", () => {
			const versions = ["1.0.0", "1.1.0", "2.0.0"];
			const versionRegex = /^\d+\.\d+\.\d+$/;

			versions.forEach((version) => {
				expect(version).toMatch(versionRegex);
			});
		});

		it("should define RVF section types", () => {
			const sectionTypes = {
				METADATA: 0x01,
				TOOLS: 0x02,
				PROMPTS: 0x03,
				SKILLS: 0x04,
				MCP_TOOLS: 0x05,
				CAPABILITIES: 0x06,
				ORCHESTRATOR: 0x07,
				CHECKSUM: 0xff,
			};

			expect(Object.keys(sectionTypes).length).toBe(8);
			expect(sectionTypes.METADATA).toBe(0x01);
			expect(sectionTypes.CHECKSUM).toBe(0xff);
		});
	});

	describe("MCP Server Type Extension", () => {
		it("should support wasm server type", () => {
			type ServerType = "base" | "custom" | "wasm";

			const serverTypes: ServerType[] = ["base", "custom", "wasm"];
			expect(serverTypes).toContain("wasm");
		});

		it("should define WASM server properties", () => {
			const wasmServer = {
				id: "wasm-rvagent",
				name: "RVAgent Local (WASM)",
				url: "wasm://local",
				type: "wasm" as const,
				status: "connected" as const,
				isLocked: false,
				tools: [],
				wasmTemplateId: "development-agent",
				wasmTemplateName: "Development Agent",
			};

			expect(wasmServer.type).toBe("wasm");
			expect(wasmServer.url).toBe("wasm://local");
			expect(wasmServer.wasmTemplateId).toBeDefined();
		});
	});

	describe("Browser Integration", () => {
		it("should detect browser environment", async () => {
			const { browser } = await import("$app/environment");
			expect(browser).toBe(true);
		});

		it("should handle IndexedDB availability", () => {
			// In test environment, IndexedDB is mocked
			const hasIndexedDB = typeof indexedDB !== "undefined" || true; // mocked
			expect(hasIndexedDB).toBe(true);
		});

		it("should validate crypto.randomUUID availability", () => {
			// crypto.randomUUID should be available in modern browsers
			const uuid = crypto.randomUUID();
			expect(uuid).toMatch(/^[0-9a-f]{8}-[0-9a-f]{4}-4[0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/i);
		});
	});

	describe("Error Handling", () => {
		it("should define MCP error codes", () => {
			const errorCodes = {
				PARSE_ERROR: -32700,
				INVALID_REQUEST: -32600,
				METHOD_NOT_FOUND: -32601,
				INVALID_PARAMS: -32602,
				INTERNAL_ERROR: -32603,
				SERVER_ERROR_START: -32099,
				SERVER_ERROR_END: -32000,
			};

			expect(errorCodes.PARSE_ERROR).toBe(-32700);
			expect(errorCodes.INTERNAL_ERROR).toBe(-32603);
		});

		it("should format error responses correctly", () => {
			const errorResponse = {
				jsonrpc: "2.0",
				id: null,
				error: {
					code: -32603,
					message: "WASM MCP server not initialized",
					data: { reason: "Module failed to load" },
				},
			};

			expect(errorResponse.error.code).toBeLessThan(0);
			expect(errorResponse.error.message).toBeTruthy();
		});
	});
});

describe("WASM Gallery Operations", () => {
	it("should define gallery list operation", () => {
		const listRequest = {
			jsonrpc: "2.0",
			id: 1,
			method: "gallery/list",
		};

		expect(listRequest.method).toBe("gallery/list");
	});

	it("should define gallery search operation", () => {
		const searchRequest = {
			jsonrpc: "2.0",
			id: 2,
			method: "gallery/search",
			params: { query: "development" },
		};

		expect(searchRequest.params.query).toBe("development");
	});

	it("should define gallery load operation", () => {
		const loadRequest = {
			jsonrpc: "2.0",
			id: 3,
			method: "gallery/load",
			params: { id: "development-agent" },
		};

		expect(loadRequest.params.id).toBe("development-agent");
	});

	it("should define gallery categories operation", () => {
		const categoriesRequest = {
			jsonrpc: "2.0",
			id: 4,
			method: "gallery/categories",
		};

		expect(categoriesRequest.method).toBe("gallery/categories");
	});
});

describe("Tool Execution", () => {
	it("should define read_file tool schema", () => {
		const readFileTool = {
			name: "read_file",
			description: "Read content from a file in the virtual filesystem",
			inputSchema: {
				type: "object",
				properties: {
					path: {
						type: "string",
						description: "Absolute path to the file",
					},
				},
				required: ["path"],
			},
		};

		expect(readFileTool.inputSchema.required).toContain("path");
	});

	it("should define write_file tool schema", () => {
		const writeFileTool = {
			name: "write_file",
			description: "Write content to a file in the virtual filesystem",
			inputSchema: {
				type: "object",
				properties: {
					path: {
						type: "string",
						description: "Absolute path to the file",
					},
					content: {
						type: "string",
						description: "Content to write",
					},
				},
				required: ["path", "content"],
			},
		};

		expect(writeFileTool.inputSchema.required).toContain("path");
		expect(writeFileTool.inputSchema.required).toContain("content");
	});

	it("should define list_files tool schema", () => {
		const listFilesTool = {
			name: "list_files",
			description: "List all files in the virtual filesystem",
			inputSchema: {
				type: "object",
				properties: {},
			},
		};

		expect(listFilesTool.name).toBe("list_files");
	});

	it("should define edit_file tool schema", () => {
		const editFileTool = {
			name: "edit_file",
			description: "Edit a file by replacing old content with new content",
			inputSchema: {
				type: "object",
				properties: {
					path: { type: "string" },
					old_content: { type: "string" },
					new_content: { type: "string" },
				},
				required: ["path", "old_content", "new_content"],
			},
		};

		expect(editFileTool.inputSchema.required.length).toBe(3);
	});

	it("should define delete_file tool schema", () => {
		const deleteFileTool = {
			name: "delete_file",
			description: "Delete a file from the virtual filesystem",
			inputSchema: {
				type: "object",
				properties: {
					path: { type: "string" },
				},
				required: ["path"],
			},
		};

		expect(deleteFileTool.name).toBe("delete_file");
	});
});
