import type { IncomingHttpHeaders } from "node:http";
import {
  isProviderApiKeyOptional,
  RouteId,
  type SupportedProvider,
  SupportedProvidersSchema,
} from "@shared";
import type { FastifyPluginAsyncZod } from "fastify-type-provider-zod";
import { capitalize } from "lodash-es";
import { z } from "zod";
import { hasPermission, userHasPermission } from "@/auth";
import { isAzureOpenAiEntraIdEnabled } from "@/clients/azure-openai-credentials";
import {
  type BedrockSigV4Credentials,
  encodeBedrockSigV4Marker,
} from "@/clients/bedrock-credentials";
import { isVertexAiEnabled } from "@/clients/gemini-client";
import logger from "@/logging";
import {
  LlmOauthClientModel,
  LlmProviderApiKeyModel,
  LlmProviderApiKeyModelLinkModel,
  ModelModel,
  OrganizationModel,
  TeamModel,
  VirtualApiKeyModel,
} from "@/models";
import { testProviderApiKey } from "@/routes/chat/model-fetchers/registry";
import {
  assertByosEnabled,
  getSecretValueForLlmProviderApiKey,
  isByosEnabled,
  secretManager,
} from "@/secrets-manager";
import { modelSyncService } from "@/services/model-sync";
import {
  ApiError,
  constructResponseSchema,
  type LlmProviderApiKey,
  LlmProviderApiKeyWithScopeInfoSchema,
  type ResourceVisibilityScope,
  ResourceVisibilityScopeSchema,
  SelectLlmProviderApiKeySchema,
  type SelectSecret,
} from "@/types";

async function testApiKeyOrThrow(
  provider: SupportedProvider,
  apiKey: string,
  baseUrl?: string | null,
  extraHeaders?: Record<string, string> | null,
): Promise<void> {
  try {
    await testProviderApiKey(provider, apiKey, baseUrl, extraHeaders);
  } catch (error) {
    throw new ApiError(
      400,
      `Invalid API key: Failed to connect to ${capitalize(provider)}: ${error instanceof Error ? error.message : String(error)}`,
    );
  }
}

async function testKeylessAzureEntraOrThrow(
  context: "discovery" | "runtime",
  baseUrl?: string | null,
  extraHeaders?: Record<string, string> | null,
): Promise<void> {
  try {
    await testProviderApiKey("azure", "", baseUrl, extraHeaders);
  } catch (error) {
    const errorMessage = error instanceof Error ? error.message : String(error);
    const contextMessage =
      context === "discovery"
        ? "Archestra could not discover any Azure model deployments. Confirm the Base URL points to an Azure OpenAI resource or Foundry v1 endpoint, and that the Azure identity has permission to read deployments on that resource."
        : "Archestra could not connect to the Azure inference endpoint. Confirm the Inference URL is reachable and the Azure identity can use models on that endpoint.";
    const validationLabel =
      context === "discovery"
        ? "Azure Entra ID validation"
        : "Azure Entra ID runtime validation";
    throw new ApiError(
      400,
      `${validationLabel} failed: ${contextMessage} Provider error: ${errorMessage}`,
    );
  }
}

function resolveRuntimeTestBaseUrl(params: {
  body: {
    baseUrl?: string | null;
    inferenceBaseUrl?: string | null;
  };
  apiKey: Pick<LlmProviderApiKey, "baseUrl" | "inferenceBaseUrl">;
}): string | null {
  const { body, apiKey } = params;
  const effectiveInferenceBaseUrl =
    body.inferenceBaseUrl !== undefined
      ? body.inferenceBaseUrl
      : apiKey.inferenceBaseUrl;
  const effectiveBaseUrl =
    body.baseUrl !== undefined ? body.baseUrl : apiKey.baseUrl;
  return effectiveInferenceBaseUrl ?? effectiveBaseUrl;
}

const llmProviderApiKeyRoutes: FastifyPluginAsyncZod = async (fastify) => {
  // List all visible LLM provider API keys for the user
  fastify.get(
    "/api/llm-provider-api-keys",
    {
      schema: {
        operationId: RouteId.GetLlmProviderApiKeys,
        description:
          "Get all LLM provider API keys visible to the current user based on scope access",
        tags: ["LLM Provider API Keys"],
        querystring: z.object({
          search: z.string().trim().min(1).optional(),
          provider: SupportedProvidersSchema.optional(),
        }),
        response: constructResponseSchema(
          z.array(LlmProviderApiKeyWithScopeInfoSchema),
        ),
      },
    },
    async ({ organizationId, user, query }, reply) => {
      // Get user's team IDs
      const userTeamIds = await TeamModel.getUserTeamIds(user.id);

      const isLlmProviderApiKeyAdmin = await userHasPermission(
        user.id,
        organizationId,
        "llmProviderApiKey",
        "admin",
      );

      const apiKeys = await LlmProviderApiKeyModel.getVisibleKeys(
        organizationId,
        user.id,
        userTeamIds,
        isLlmProviderApiKeyAdmin,
        {
          search: query.search,
          provider: query.provider,
        },
      );
      return reply.send(apiKeys);
    },
  );

  // Get available API keys for LLM-powered features
  fastify.get(
    "/api/llm-provider-api-keys/available",
    {
      schema: {
        operationId: RouteId.GetAvailableLlmProviderApiKeys,
        description:
          "Get LLM provider API keys available for the current user to use",
        tags: ["LLM Provider API Keys"],
        querystring: z.object({
          provider: SupportedProvidersSchema.optional(),
          /** Include a specific key by ID even if user doesn't have direct access (e.g. agent's configured key) */
          includeKeyId: z.string().uuid().optional(),
        }),
        response: constructResponseSchema(
          z.array(LlmProviderApiKeyWithScopeInfoSchema),
        ),
      },
    },
    async ({ organizationId, user, query }, reply) => {
      const userTeamIds = await TeamModel.getUserTeamIds(user.id);

      const apiKeys = await LlmProviderApiKeyModel.getAvailableKeysForUser(
        organizationId,
        user.id,
        userTeamIds,
        query.provider,
      );

      // If includeKeyId is provided and not already in results, fetch it separately
      if (
        query.includeKeyId &&
        !apiKeys.some((k) => k.id === query.includeKeyId)
      ) {
        const agentKey = await LlmProviderApiKeyModel.findById(
          query.includeKeyId,
        );
        if (agentKey && agentKey.organizationId === organizationId) {
          apiKeys.push({
            ...agentKey,
            teamName: null,
            userName: null,
            isAgentKey: true,
          });
        }
      }

      const bestModelsByApiKeyId =
        await LlmProviderApiKeyModelLinkModel.getBestModelsForApiKeys(
          apiKeys.map((key) => key.id),
        );

      const apiKeysWithBestModel = apiKeys.map((key) => ({
        ...key,
        bestModelId: bestModelsByApiKeyId.get(key.id)?.id ?? null,
      }));

      return reply.send(apiKeysWithBestModel);
    },
  );

  // Create a new LLM provider API key
  fastify.post(
    "/api/llm-provider-api-keys",
    {
      schema: {
        operationId: RouteId.CreateLlmProviderApiKey,
        description:
          "Create a new LLM provider API key with specified visibility",
        tags: ["LLM Provider API Keys"],
        body: z
          .object({
            name: z.string().min(1, "Name is required"),
            provider: SupportedProvidersSchema,
            apiKey: z.string().min(1).optional(),
            baseUrl: z.string().url().nullable().optional(),
            inferenceBaseUrl: z.string().url().nullable().optional(),
            extraHeaders: z
              .record(z.string(), z.string())
              .nullable()
              .optional(),
            scope: ResourceVisibilityScopeSchema.default("personal"),
            teamId: z.string().optional(),
            isPrimary: z.boolean().optional(),
            vaultSecretPath: z.string().min(1).optional(),
            vaultSecretKey: z.string().min(1).optional(),
            /** Bedrock-only: AWS access key ID for SigV4 auth */
            awsAccessKeyId: z.string().min(1).optional(),
            /** Bedrock-only: AWS secret access key for SigV4 auth */
            awsSecretAccessKey: z.string().min(1).optional(),
            /** Bedrock-only: optional AWS session token for STS/temporary creds */
            awsSessionToken: z.string().min(1).optional(),
          })
          .refine(
            (data) => {
              const hasSigV4 = data.awsAccessKeyId && data.awsSecretAccessKey;
              if (hasSigV4) return data.provider === "bedrock";
              if (isByosEnabled()) {
                return data.vaultSecretPath && data.vaultSecretKey;
              }
              return (
                isProviderApiKeyOptional({
                  provider: data.provider,
                  azureEntraIdEnabled: isAzureOpenAiEntraIdEnabled(),
                }) || data.apiKey
              );
            },
            {
              message:
                "Either apiKey, both vaultSecretPath and vaultSecretKey, or AWS SigV4 credentials (Bedrock only) must be provided",
            },
          ),
        response: constructResponseSchema(SelectLlmProviderApiKeySchema),
      },
    },
    async ({ body, organizationId, user, headers }, reply) => {
      // Prevent creating Gemini API keys when Vertex AI is enabled
      validateProviderAllowed(body.provider);

      // Validate scope/teamId combination and authorization
      await validateScopeAndAuthorization({
        scope: body.scope,
        teamId: body.teamId,
        userId: user.id,
        organizationId,
        headers,
      });

      let secret: SelectSecret | null = null;
      let actualApiKeyValue: string | null = null;
      const runtimeTestBaseUrl = body.inferenceBaseUrl ?? body.baseUrl;

      // Bedrock SigV4: store credentials as JSON in the secret payload, then
      // test using the marker-encoded form.
      if (body.awsAccessKeyId && body.awsSecretAccessKey) {
        if (body.provider !== "bedrock") {
          throw new ApiError(
            400,
            "AWS SigV4 credentials are only supported for the Bedrock provider",
          );
        }
        const sigV4: BedrockSigV4Credentials = {
          accessKeyId: body.awsAccessKeyId,
          secretAccessKey: body.awsSecretAccessKey,
          sessionToken: body.awsSessionToken,
        };
        actualApiKeyValue = encodeBedrockSigV4Marker(sigV4);
        await testApiKeyOrThrow(
          body.provider,
          actualApiKeyValue,
          runtimeTestBaseUrl,
          body.extraHeaders,
        );
        secret = await secretManager().createSecret(
          {
            accessKeyId: sigV4.accessKeyId,
            secretAccessKey: sigV4.secretAccessKey,
            ...(sigV4.sessionToken ? { sessionToken: sigV4.sessionToken } : {}),
          },
          getChatApiKeySecretName({
            scope: body.scope,
            teamId: body.teamId ?? null,
            userId: user.id,
          }),
        );
      } else if (isByosEnabled()) {
        if (!body.vaultSecretPath || !body.vaultSecretKey) {
          throw new ApiError(400, "Vault secret path and key are required");
        }
        const vaultReference = `${body.vaultSecretPath}#${body.vaultSecretKey}`;
        // first, get secret from vault path and key
        const manager = assertByosEnabled();
        const vaultData = await manager.getSecretFromPath(body.vaultSecretPath);
        actualApiKeyValue = vaultData[body.vaultSecretKey];

        if (!actualApiKeyValue) {
          throw new ApiError(
            400,
            `API key not found in Vault secret at path "${body.vaultSecretPath}" with key "${body.vaultSecretKey}"`,
          );
        }
        // then test the API key
        await testApiKeyOrThrow(
          body.provider,
          actualApiKeyValue,
          runtimeTestBaseUrl,
          body.extraHeaders,
        );
        // then create the secret
        secret = await secretManager().createSecret(
          { apiKey: vaultReference },
          getChatApiKeySecretName({
            scope: body.scope,
            teamId: body.teamId ?? null,
            userId: user.id,
          }),
        );
      } else if (body.apiKey) {
        // When readonly_vault is disabled
        actualApiKeyValue = body.apiKey;
        // Test the API key before saving
        await testApiKeyOrThrow(
          body.provider,
          actualApiKeyValue,
          runtimeTestBaseUrl,
          body.extraHeaders,
        );

        secret = await secretManager().createSecret(
          { apiKey: actualApiKeyValue },
          getChatApiKeySecretName({
            scope: body.scope,
            teamId: body.teamId ?? null,
            userId: user.id,
          }),
        );
      }

      if (
        body.provider === "azure" &&
        !actualApiKeyValue &&
        isAzureOpenAiEntraIdEnabled()
      ) {
        await testKeylessAzureEntraOrThrow(
          "discovery",
          body.baseUrl,
          body.extraHeaders,
        );
        if (body.inferenceBaseUrl && body.inferenceBaseUrl !== body.baseUrl) {
          await testKeylessAzureEntraOrThrow(
            "runtime",
            body.inferenceBaseUrl,
            body.extraHeaders,
          );
        }
      }

      if (
        !secret &&
        !isProviderApiKeyOptional({
          provider: body.provider,
          azureEntraIdEnabled: isAzureOpenAiEntraIdEnabled(),
        })
      ) {
        throw new ApiError(
          400,
          "Secret creation failed, cannot create API key",
        );
      }

      // Create the API key record
      const createdApiKey = await LlmProviderApiKeyModel.create({
        organizationId,
        name: body.name,
        provider: body.provider,
        secretId: secret?.id ?? null,
        baseUrl: body.baseUrl ?? null,
        inferenceBaseUrl: body.inferenceBaseUrl ?? null,
        extraHeaders: body.extraHeaders ?? null,
        scope: body.scope,
        userId: body.scope === "personal" ? user.id : null,
        teamId: body.scope === "team" ? body.teamId : null,
        isPrimary: body.isPrimary ?? false,
      });

      // Sync models for the new API key before returning so the frontend
      // can immediately show available models after creation.
      // For optional-key providers (Ollama, vLLM), sync even without an API key value.
      const canSync =
        actualApiKeyValue ||
        isProviderApiKeyOptional({
          provider: body.provider,
          azureEntraIdEnabled: isAzureOpenAiEntraIdEnabled(),
        });
      if (canSync) {
        try {
          await modelSyncService.syncModelsForApiKey({
            apiKeyId: createdApiKey.id,
            provider: body.provider,
            apiKeyValue: actualApiKeyValue ?? "",
            // Model sync uses the discovery endpoint; runtime calls use inferenceBaseUrl.
            baseUrl: body.baseUrl,
            extraHeaders: body.extraHeaders ?? null,
          });
        } catch (error) {
          // Model sync failure shouldn't block API key creation
          logger.error(
            {
              apiKeyId: createdApiKey.id,
              provider: body.provider,
              errorMessage:
                error instanceof Error ? error.message : String(error),
            },
            "Failed to sync models for new API key",
          );
        }

        try {
          await modelSyncService.maybeAutoSetOrgDefaultModel({
            organizationId,
            apiKeyId: createdApiKey.id,
            provider: body.provider,
          });
        } catch (error) {
          // Auto-default selection is best-effort; never block key creation.
          logger.error(
            {
              apiKeyId: createdApiKey.id,
              provider: body.provider,
              errorMessage:
                error instanceof Error ? error.message : String(error),
            },
            "Failed to auto-select org default model for new API key",
          );
        }
      }

      return reply.send(createdApiKey);
    },
  );

  // Get a single LLM provider API key
  fastify.get(
    "/api/llm-provider-api-keys/:id",
    {
      schema: {
        operationId: RouteId.GetLlmProviderApiKey,
        description: "Get a specific LLM provider API key",
        tags: ["LLM Provider API Keys"],
        params: z.object({
          id: z.string().uuid(),
        }),
        response: constructResponseSchema(LlmProviderApiKeyWithScopeInfoSchema),
      },
    },
    async ({ params, organizationId, user }, reply) => {
      const apiKey = await LlmProviderApiKeyModel.findById(params.id);

      if (!apiKey || apiKey.organizationId !== organizationId) {
        throw new ApiError(404, "LLM provider API key not found");
      }

      // Check visibility based on scope
      const userTeamIds = await TeamModel.getUserTeamIds(user.id);
      const isLlmProviderApiKeyAdmin = await userHasPermission(
        user.id,
        organizationId,
        "llmProviderApiKey",
        "admin",
      );

      // Personal keys: only visible to owner
      if (apiKey.scope === "personal" && apiKey.userId !== user.id) {
        throw new ApiError(404, "LLM provider API key not found");
      }

      // Team keys: visible to team members or admins
      if (apiKey.scope === "team" && !isLlmProviderApiKeyAdmin) {
        if (!apiKey.teamId || !userTeamIds.includes(apiKey.teamId)) {
          throw new ApiError(404, "LLM provider API key not found");
        }
      }

      return reply.send(apiKey);
    },
  );

  // Update an LLM provider API key
  fastify.patch(
    "/api/llm-provider-api-keys/:id",
    {
      schema: {
        operationId: RouteId.UpdateLlmProviderApiKey,
        description:
          "Update an LLM provider API key (name, API key value, visibility, or team)",
        tags: ["LLM Provider API Keys"],
        params: z.object({
          id: z.string().uuid(),
        }),
        body: z
          .object({
            name: z.string().min(1).optional(),
            apiKey: z.string().min(1).optional(),
            baseUrl: z.string().url().nullable().optional(),
            inferenceBaseUrl: z.string().url().nullable().optional(),
            extraHeaders: z
              .record(z.string(), z.string())
              .nullable()
              .optional(),
            scope: ResourceVisibilityScopeSchema.optional(),
            teamId: z.string().uuid().nullable().optional(),
            isPrimary: z.boolean().optional(),
            vaultSecretPath: z.string().min(1).optional(),
            vaultSecretKey: z.string().min(1).optional(),
            /** Bedrock-only: AWS access key ID for SigV4 auth */
            awsAccessKeyId: z.string().min(1).optional(),
            /** Bedrock-only: AWS secret access key for SigV4 auth */
            awsSecretAccessKey: z.string().min(1).optional(),
            /** Bedrock-only: optional AWS session token for STS/temporary creds */
            awsSessionToken: z.string().min(1).optional(),
          })
          .refine(
            (data) => {
              const hasSigV4 = data.awsAccessKeyId && data.awsSecretAccessKey;
              if (hasSigV4) return true;
              // If no key-related fields are provided, that's fine (updating other fields)
              if (
                !data.apiKey &&
                !data.vaultSecretPath &&
                !data.vaultSecretKey
              ) {
                return true;
              }
              // If apiKey is provided, that's always valid
              if (data.apiKey) {
                return true;
              }
              // If BYOS is enabled and vault fields are provided, both must be present
              if (isByosEnabled()) {
                return data.vaultSecretPath && data.vaultSecretKey;
              }
              return false;
            },
            {
              message:
                "Either apiKey, both vaultSecretPath and vaultSecretKey, or AWS SigV4 credentials must be provided",
            },
          ),
        response: constructResponseSchema(SelectLlmProviderApiKeySchema),
      },
    },
    async ({ params, body, organizationId, user, headers }, reply) => {
      const apiKeyFromDB = await LlmProviderApiKeyModel.findById(params.id);

      if (!apiKeyFromDB || apiKeyFromDB.organizationId !== organizationId) {
        throw new ApiError(404, "LLM provider API key not found");
      }

      // Check authorization based on current scope
      await authorizeApiKeyAccess({
        apiKey: apiKeyFromDB,
        userId: user.id,
        organizationId,
        headers,
      });

      // If scope is changing, validate the new scope
      const newScope = body.scope ?? apiKeyFromDB.scope;
      const newTeamId =
        body.teamId !== undefined ? body.teamId : apiKeyFromDB.teamId;
      let newSecretId: string | null = null;

      if (body.scope !== undefined || body.teamId !== undefined) {
        await validateScopeAndAuthorization({
          scope: newScope,
          teamId: newTeamId,
          userId: user.id,
          organizationId,
          headers,
        });
      }

      const sigV4FromBody =
        body.awsAccessKeyId && body.awsSecretAccessKey
          ? {
              accessKeyId: body.awsAccessKeyId,
              secretAccessKey: body.awsSecretAccessKey,
              sessionToken: body.awsSessionToken,
            }
          : null;
      const hasSigV4Update = sigV4FromBody !== null;
      if (hasSigV4Update && apiKeyFromDB.provider !== "bedrock") {
        throw new ApiError(
          400,
          "AWS SigV4 credentials are only supported for the Bedrock provider",
        );
      }

      // Update the secret if a new API key is provided (via direct value, vault reference, or SigV4 credentials)
      if (
        body.apiKey ||
        (body.vaultSecretPath && body.vaultSecretKey) ||
        hasSigV4Update
      ) {
        let secretPayload: Record<string, string>;
        let testValue: string;

        if (sigV4FromBody) {
          const sigV4: BedrockSigV4Credentials = sigV4FromBody;
          secretPayload = {
            accessKeyId: sigV4.accessKeyId,
            secretAccessKey: sigV4.secretAccessKey,
            ...(sigV4.sessionToken ? { sessionToken: sigV4.sessionToken } : {}),
          };
          testValue = encodeBedrockSigV4Marker(sigV4);
        } else if (
          isByosEnabled() &&
          body.vaultSecretPath &&
          body.vaultSecretKey
        ) {
          // Get secret from vault
          const manager = assertByosEnabled();
          const vaultData = await manager.getSecretFromPath(
            body.vaultSecretPath,
          );
          const apiKeyValue = vaultData[body.vaultSecretKey];
          if (!apiKeyValue) {
            throw new ApiError(
              400,
              `API key not found in Vault secret at path "${body.vaultSecretPath}" with key "${body.vaultSecretKey}"`,
            );
          }
          const vaultReference = `${body.vaultSecretPath}#${body.vaultSecretKey}`;
          secretPayload = { apiKey: vaultReference };
          testValue = apiKeyValue;
        } else if (body.apiKey) {
          // Use direct API key value
          secretPayload = { apiKey: body.apiKey };
          testValue = body.apiKey;
        } else {
          // This shouldn't happen due to refine, but TypeScript needs this
          throw new ApiError(400, "API key or vault reference is required");
        }

        // Test the API key before saving
        // Use user-provided baseUrl/extraHeaders if present, otherwise fall
        // back to what's stored on the API key record.
        const testBaseUrl = resolveRuntimeTestBaseUrl({
          body,
          apiKey: apiKeyFromDB,
        });
        const testExtraHeaders =
          body.extraHeaders !== undefined
            ? body.extraHeaders
            : apiKeyFromDB.extraHeaders;
        await testApiKeyOrThrow(
          apiKeyFromDB.provider,
          testValue,
          testBaseUrl,
          testExtraHeaders,
        );

        // Update or create the secret
        if (apiKeyFromDB.secretId) {
          await secretManager().updateSecret(
            apiKeyFromDB.secretId,
            secretPayload,
          );
        } else {
          const secret = await secretManager().createSecret(
            secretPayload,
            getChatApiKeySecretName({
              scope: newScope,
              teamId: newTeamId,
              userId: user.id,
            }),
          );
          newSecretId = secret.id;
        }
      } else if (
        body.baseUrl !== undefined ||
        body.inferenceBaseUrl !== undefined ||
        body.extraHeaders !== undefined
      ) {
        // If runtime connection settings are being updated without a new API key,
        // re-test using the existing API key.
        let apiKeyValue: string | undefined;

        if (apiKeyFromDB.secretId) {
          apiKeyValue = await getSecretValueForLlmProviderApiKey(
            apiKeyFromDB.secretId,
          );
        }
        const testBaseUrl = resolveRuntimeTestBaseUrl({
          body,
          apiKey: apiKeyFromDB,
        });
        const testExtraHeaders =
          body.extraHeaders !== undefined
            ? body.extraHeaders
            : apiKeyFromDB.extraHeaders;
        if (apiKeyValue) {
          await testApiKeyOrThrow(
            apiKeyFromDB.provider,
            apiKeyValue,
            testBaseUrl,
            testExtraHeaders,
          );
        } else if (
          apiKeyFromDB.provider === "azure" &&
          isAzureOpenAiEntraIdEnabled()
        ) {
          await testKeylessAzureEntraOrThrow(
            "runtime",
            testBaseUrl,
            testExtraHeaders,
          );
        } else if (
          !isProviderApiKeyOptional({
            provider: apiKeyFromDB.provider,
            azureEntraIdEnabled: isAzureOpenAiEntraIdEnabled(),
          })
        ) {
          throw new ApiError(
            400,
            "Cannot update Base URL, Inference URL, or extra headers without existing API key",
          );
        }
      }

      // Build update object
      const updateData: Partial<{
        name: string;
        baseUrl: string | null;
        inferenceBaseUrl: string | null;
        extraHeaders: Record<string, string> | null;
        scope: ResourceVisibilityScope;
        userId: string | null;
        teamId: string | null;
        secretId: string | null;
        isPrimary: boolean;
      }> = {};

      if (body.name) {
        updateData.name = body.name;
      }

      if (body.baseUrl !== undefined) {
        updateData.baseUrl = body.baseUrl;
      }

      if (body.inferenceBaseUrl !== undefined) {
        updateData.inferenceBaseUrl = body.inferenceBaseUrl;
      }

      if (body.extraHeaders !== undefined) {
        updateData.extraHeaders = body.extraHeaders;
      }

      if (body.isPrimary !== undefined) {
        updateData.isPrimary = body.isPrimary;
      }

      if (newSecretId) {
        updateData.secretId = newSecretId;
      }

      if (body.scope !== undefined) {
        updateData.scope = body.scope;
        // Set userId/teamId based on new scope
        updateData.userId = body.scope === "personal" ? user.id : null;
        updateData.teamId = body.scope === "team" ? newTeamId : null;
      } else if (body.teamId !== undefined && apiKeyFromDB.scope === "team") {
        // Only update teamId if scope is team and not changing
        updateData.teamId = body.teamId;
      }

      if (Object.keys(updateData).length > 0) {
        await LlmProviderApiKeyModel.update(params.id, updateData);
      }

      const updated = await LlmProviderApiKeyModel.findById(params.id);
      if (!updated) {
        throw new ApiError(404, "LLM provider API key not found");
      }
      return reply.send(updated);
    },
  );

  // Delete an LLM provider API key
  fastify.delete(
    "/api/llm-provider-api-keys/:id",
    {
      schema: {
        operationId: RouteId.DeleteLlmProviderApiKey,
        description: "Delete an LLM provider API key",
        tags: ["LLM Provider API Keys"],
        params: z.object({
          id: z.string().uuid(),
        }),
        response: constructResponseSchema(z.object({ success: z.boolean() })),
      },
    },
    async ({ params, organizationId, user, headers }, reply) => {
      const apiKey = await LlmProviderApiKeyModel.findById(params.id);

      if (!apiKey || apiKey.organizationId !== organizationId) {
        throw new ApiError(404, "LLM provider API key not found");
      }

      // Check authorization based on scope
      await authorizeApiKeyAccess({
        apiKey,
        userId: user.id,
        organizationId,
        headers,
      });

      // Prevent deletion if the key is used for knowledge base embedding or reranking
      const org = await OrganizationModel.getById(organizationId);
      if (org) {
        const usages: string[] = [];
        if (org.embeddingChatApiKeyId === params.id) usages.push("embedding");
        if (org.rerankerChatApiKeyId === params.id) usages.push("reranking");
        if (usages.length > 0) {
          throw new ApiError(
            400,
            `This API key is used for knowledge base ${usages.join(" and ")}. Remove it from Settings > Knowledge before deleting.`,
          );
        }
      }

      const virtualKeys = await VirtualApiKeyModel.findByProviderApiKeyId({
        providerApiKeyId: params.id,
        organizationId,
        userId: user.id,
        userTeamIds: await TeamModel.getUserTeamIds(user.id),
        isAdmin: true,
      });
      if (virtualKeys.length > 0) {
        throw new ApiError(
          400,
          "This API key is mapped to one or more virtual API keys. Remove those mappings before deleting it.",
        );
      }

      const oauthClients = await LlmOauthClientModel.findByProviderApiKeyId({
        providerApiKeyId: params.id,
        organizationId,
      });
      if (oauthClients.length > 0) {
        throw new ApiError(
          400,
          "This API key is mapped to one or more OAuth clients. Remove those mappings before deleting it.",
        );
      }

      // Delete the parent key's associated secret
      if (apiKey.secretId) {
        await secretManager().deleteSecret(apiKey.secretId);
      }

      await LlmProviderApiKeyModel.delete(params.id);

      // Clean up orphaned models that lost their last API key link.
      // Models discovered via LLM Proxy are preserved for custom pricing.
      const deletedCount = await ModelModel.deleteOrphanedModels();
      if (deletedCount > 0) {
        logger.info(
          { deletedCount },
          "Cleaned up orphaned models after API key deletion",
        );
      }

      return reply.send({ success: true });
    },
  );
};

/**
 * Validates scope/teamId combination and checks user authorization for the scope.
 * Used for both creating and updating API keys.
 */
async function validateScopeAndAuthorization(params: {
  scope: ResourceVisibilityScope;
  teamId: string | null | undefined;
  userId: string;
  organizationId: string;
  headers: IncomingHttpHeaders;
}): Promise<void> {
  const { scope, teamId, userId, organizationId, headers } = params;

  // Validate scope-specific requirements
  if (scope === "team" && !teamId) {
    throw new ApiError(400, "teamId is required for team-scoped API keys");
  }

  if (scope === "personal" && teamId) {
    throw new ApiError(
      400,
      "teamId should not be provided for personal-scoped API keys",
    );
  }

  if (scope === "org" && teamId) {
    throw new ApiError(
      400,
      "teamId should not be provided for org-wide API keys",
    );
  }

  // For team-scoped keys, verify user has access to the team
  if (scope === "team" && teamId) {
    const { success: isTeamAdmin } = await hasPermission(
      { team: ["admin"] },
      headers,
    );

    if (!isTeamAdmin) {
      const isUserInTeam = await TeamModel.isUserInTeam(teamId, userId);
      if (!isUserInTeam) {
        throw new ApiError(
          403,
          "You must be a member of the team to use this scope",
        );
      }
    }
  }

  // For org-wide keys, require the dedicated API-key admin permission
  if (scope === "org") {
    const isLlmProviderApiKeyAdmin = await userHasPermission(
      userId,
      organizationId,
      "llmProviderApiKey",
      "admin",
    );
    if (!isLlmProviderApiKeyAdmin) {
      throw new ApiError(
        403,
        "Only llmProviderApiKey admins can use organization-wide scope",
      );
    }
  }
}

/**
 * Helper to check if a user is authorized to modify an API key based on scope
 */
async function authorizeApiKeyAccess(params: {
  apiKey: { scope: string; userId: string | null; teamId: string | null };
  userId: string;
  organizationId: string;
  headers: IncomingHttpHeaders;
}): Promise<void> {
  const { apiKey, userId, organizationId, headers } = params;

  // Personal keys: only owner can modify
  if (apiKey.scope === "personal") {
    if (apiKey.userId !== userId) {
      throw new ApiError(403, "You can only modify your own personal API keys");
    }
    return;
  }

  // Team keys: require team membership or team admin
  if (apiKey.scope === "team") {
    const { success: isTeamAdmin } = await hasPermission(
      { team: ["admin"] },
      headers,
    );

    if (!isTeamAdmin && apiKey.teamId) {
      const isUserInTeam = await TeamModel.isUserInTeam(apiKey.teamId, userId);
      if (!isUserInTeam) {
        throw new ApiError(
          403,
          "You can only modify team API keys for teams you are a member of",
        );
      }
    }
    return;
  }

  // Org-wide keys: require the dedicated API-key admin permission
  if (apiKey.scope === "org") {
    const isLlmProviderApiKeyAdmin = await userHasPermission(
      userId,
      organizationId,
      "llmProviderApiKey",
      "admin",
    );
    if (!isLlmProviderApiKeyAdmin) {
      throw new ApiError(
        403,
        "Only llmProviderApiKey admins can modify organization-wide API keys",
      );
    }
    return;
  }
}

function getChatApiKeySecretName({
  scope,
  teamId,
  userId,
}: {
  scope: ResourceVisibilityScope;
  teamId: string | null;
  userId: string | null;
}): string {
  if (scope === "personal") {
    return `chatapikey-personal-${userId}`;
  }
  if (scope === "team") {
    return `chatapikey-team-${teamId}`;
  }
  return `chatapikey-org`;
}

/**
 * Validates that the provider is allowed based on current configuration.
 * Throws ApiError if Gemini provider is requested while Vertex AI is enabled.
 */
export function validateProviderAllowed(provider: SupportedProvider): void {
  if (provider === "gemini" && isVertexAiEnabled()) {
    throw new ApiError(
      400,
      "Cannot create Gemini API key: Vertex AI is configured. Gemini uses Application Default Credentials instead of API keys.",
    );
  }
}

export default llmProviderApiKeyRoutes;
