import type Database from "bun:sqlite";

import { describe, expect, mock, test } from "bun:test";

import type { Provider, ProviderOption, RuntimeMode } from "../../../src/shared/api";

import { createModel } from "../../../src/server/db/models";
import { createProvider } from "../../../src/server/db/providers";
import { createNoopLogger } from "../../../src/server/logger";
import { createMigratedMemoryTestDatabase } from "../../helpers";

const MODE: RuntimeMode = "test";
const LOG = createNoopLogger();

void mock.module("ai", () => ({
  createProviderRegistry: () => ({
    languageModel: () => ({}),
  }),
}));

async function createProviderViaHandler(req: Request, db: Database): Promise<Response> {
  const { handleCreateProvider: h } = await import("../../../src/server/routes/providers/create");
  return h(req, db, MODE, LOG);
}

function createTestProvider(db: Database, name = "测试供应商", baseUrl = "https://api.test.com/v1"): Provider {
  const result = createProvider(
    db,
    {
      apiKey: "sk-test",
      baseUrl,
      name,
      type: "openai",
    },
    LOG,
  );
  if ("error" in result) throw new Error(result.error);
  return result.provider;
}

async function deleteProviderViaHandler(req: Request, db: Database): Promise<Response> {
  const { handleDeleteProvider: h } = await import("../../../src/server/routes/providers/delete");
  return h(req, db, MODE, LOG);
}

async function getProviderViaHandler(req: Request, db: Database): Promise<Response> {
  const { handleGetProvider: h } = await import("../../../src/server/routes/providers/get");
  return h(req, db, MODE, LOG);
}

async function listProviderOptionsViaHandler(_req: Request, db: Database): Promise<Response> {
  const { handleListProviderOptions: h } = await import("../../../src/server/routes/providers/options");
  return h(db, MODE, LOG);
}

async function listProvidersViaHandler(req: Request, db: Database): Promise<Response> {
  const { handleListProviders: h } = await import("../../../src/server/routes/providers/list");
  return h(req, db, MODE, LOG);
}

async function testProviderConfigViaHandler(req: Request, db: Database): Promise<Response> {
  const { handleTestProviderConfig: h } = await import("../../../src/server/routes/providers/test");
  return h(req, db, MODE, LOG);
}

async function updateProviderViaHandler(req: Request, db: Database): Promise<Response> {
  const { handleUpdateProvider: h } = await import("../../../src/server/routes/providers/update");
  return h(req, db, MODE, LOG);
}

async function withProviderServer(
  modelsResponse: Response,
  callback: (baseUrl: string) => Promise<void>,
): Promise<void> {
  const server = Bun.serve({
    fetch(request) {
      if (request.method === "HEAD") return new Response(null, { status: 200 });
      return modelsResponse;
    },
    port: 0,
  });
  try {
    await callback(`http://127.0.0.1:${server.port}/v1`);
  } finally {
    await server.stop(true);
  }
}

async function withRouteDb(callback: (db: Database) => Promise<void>): Promise<void> {
  const handle = createMigratedMemoryTestDatabase("route-provider-test");
  try {
    await callback(handle.db);
    handle.close();
  } finally {
    handle.cleanup();
  }
}

describe("供应商 API 路由", () => {
  test("POST /api/providers 创建供应商", async () => {
    await withRouteDb(async (db) => {
      const req = new Request("http://localhost/api/providers", {
        body: JSON.stringify({
          apiKey: "sk-test",
          baseUrl: "https://api.openai.com/v1",
          name: "OpenAI",
          type: "openai",
        }),
        headers: { "Content-Type": "application/json" },
        method: "POST",
      });
      const res = await createProviderViaHandler(req, db);
      expect(res.status).toBe(201);
      const body = (await res.json()) as { provider: Provider };
      expect(body.provider.name).toBe("OpenAI");
      expect(body.provider.type).toBe("openai");
    });
  });

  test("GET /api/providers 列表查询", async () => {
    await withRouteDb(async (db) => {
      createTestProvider(db, "A供应商");
      createTestProvider(db, "B供应商");

      const req = new Request("http://localhost/api/providers?page=1&pageSize=20");
      const res = await listProvidersViaHandler(req, db);
      expect(res.status).toBe(200);
      const body = (await res.json()) as { items: Provider[]; total: number };
      expect(body.total).toBe(2);
      expect(body.items.length).toBe(2);
    });
  });

  test("GET /api/providers/options 返回最小字段", async () => {
    await withRouteDb(async (db) => {
      createTestProvider(db, "选项供应商");

      const req = new Request("http://localhost/api/providers/options");
      const res = await listProviderOptionsViaHandler(req, db);
      expect(res.status).toBe(200);
      const body = (await res.json()) as { items: ProviderOption[] };
      expect(body.items).toHaveLength(1);
      expect(typeof body.items[0]?.id).toBe("string");
      expect(body.items[0]).toMatchObject({ name: "选项供应商", type: "openai" });
      expect(body.items[0]).not.toHaveProperty("apiKey");
      expect(body.items[0]).not.toHaveProperty("enabled");
    });
  });

  test("GET /api/providers/:id 获取详情", async () => {
    await withRouteDb(async (db) => {
      const provider = createTestProvider(db, "详情路由");

      const req = new Request(`http://localhost/api/providers/${provider.id}`);
      const res = await getProviderViaHandler(req, db);
      expect(res.status).toBe(200);
      const body = (await res.json()) as { provider: Provider };
      expect(body.provider.name).toBe("详情路由");
    });
  });

  test("PATCH /api/providers/:id 更新供应商", async () => {
    await withRouteDb(async (db) => {
      const provider = createTestProvider(db, "更新路由");

      const req = new Request(`http://localhost/api/providers/${provider.id}`, {
        body: JSON.stringify({ name: "已更新" }),
        headers: { "Content-Type": "application/json" },
        method: "PATCH",
      });
      const res = await updateProviderViaHandler(req, db);
      expect(res.status).toBe(200);
      const body = (await res.json()) as { provider: Provider };
      expect(body.provider.name).toBe("已更新");
    });
  });

  test("DELETE /api/providers/:id 删除供应商", async () => {
    await withRouteDb(async (db) => {
      const provider = createTestProvider(db, "删除路由");

      const req = new Request(`http://localhost/api/providers/${provider.id}`, { method: "DELETE" });
      const res = await deleteProviderViaHandler(req, db);
      expect(res.status).toBe(204);
    });
  });

  test("DELETE /api/providers/:id 存在关联模型时返回 409", async () => {
    await withRouteDb(async (db) => {
      const provider = createTestProvider(db, "有关联模型");
      const modelResult = createModel(
        db,
        {
          capabilities: ["text"],
          modelId: "gpt-4o",
          name: "GPT-4o",
          providerId: provider.id,
        },
        LOG,
      );
      if ("error" in modelResult) throw new Error(modelResult.error);

      const req = new Request(`http://localhost/api/providers/${provider.id}`, { method: "DELETE" });
      const res = await deleteProviderViaHandler(req, db);
      expect(res.status).toBe(409);
      const body = (await res.json()) as { error: string };
      expect(body.error).toContain("存在模型");
    });
  });

  test("POST /api/providers/test 使用表单配置测试连通性", async () => {
    await withRouteDb(async (db) => {
      await withProviderServer(Response.json({ data: [{ id: "gpt-4o" }] }), async (baseUrl) => {
        const req = new Request("http://localhost/api/providers/test", {
          body: JSON.stringify({
            apiKey: "sk-test",
            baseUrl,
            name: "OpenAI",
            type: "openai",
          }),
          headers: { "Content-Type": "application/json" },
          method: "POST",
        });
        const res = await testProviderConfigViaHandler(req, db);
        expect(res.status).toBe(200);
        const body = (await res.json()) as { providerTestResponse: { message: string; ok: boolean } };
        expect(body.providerTestResponse.ok).toBe(true);
        expect(body.providerTestResponse.message).toContain("/models 返回 1 个模型");
      });
    });
  });

  test("创建同名供应商返回 409", async () => {
    await withRouteDb(async (db) => {
      const req1 = new Request("http://localhost/api/providers", {
        body: JSON.stringify({
          apiKey: "sk-a",
          baseUrl: "https://a.com",
          name: "重复名",
          type: "openai",
        }),
        headers: { "Content-Type": "application/json" },
        method: "POST",
      });
      await createProviderViaHandler(req1, db);

      const req2 = new Request("http://localhost/api/providers", {
        body: JSON.stringify({
          apiKey: "sk-b",
          baseUrl: "https://b.com",
          name: "重复名",
          type: "openai",
        }),
        headers: { "Content-Type": "application/json" },
        method: "POST",
      });
      const res = await createProviderViaHandler(req2, db);
      expect(res.status).toBe(409);
    });
  });
});