import { describe, it, expect, vi, beforeEach, afterEach } from "vitest";
import express from "express";
import request from "supertest";

// Mock all heavy dependencies
vi.mock("../services/browser.js", () => ({
  renderPdf: vi.fn(),
  renderUrlPdf: vi.fn(),
  initBrowser: vi.fn(),
  closeBrowser: vi.fn(),
}));

vi.mock("../services/keys.js", () => ({
  loadKeys: vi.fn(),
  getAllKeys: vi.fn().mockReturnValue([]),
  isValidKey: vi.fn(),
  getKeyInfo: vi.fn(),
  isProKey: vi.fn(),
  keyStore: new Map(),
}));

vi.mock("../services/db.js", () => ({
  initDatabase: vi.fn(),
  pool: { query: vi.fn(), end: vi.fn() },
  queryWithRetry: vi.fn(),
  connectWithRetry: vi.fn(),
  cleanupStaleData: vi.fn(),
}));

vi.mock("../services/verification.js", () => ({
  verifyToken: vi.fn(),
  loadVerifications: vi.fn(),
}));

vi.mock("../middleware/usage.js", () => ({
  usageMiddleware: (_req: any, _res: any, next: any) => next(),
  loadUsageData: vi.fn(),
  getUsageStats: vi.fn().mockReturnValue({ "test-key": { count: 42, month: "2026-03" } }),
  getUsageForKey: vi.fn().mockReturnValue({ count: 10, monthKey: "2026-03" }),
  flushDirtyEntries: vi.fn(),
}));

vi.mock("../middleware/pdfRateLimit.js", () => ({
  pdfRateLimitMiddleware: (_req: any, _res: any, next: any) => next(),
  getConcurrencyStats: vi.fn().mockReturnValue({ active: 2, queued: 0, maxConcurrent: 10 }),
}));

const TEST_KEY = "test-key-123";
const ADMIN_KEY = "admin-key-456";

describe("Admin integration tests", () => {
  let app: express.Express;
  let originalAdminKey: string | undefined;

  beforeEach(async () => {
    vi.clearAllMocks();
    vi.resetModules();

    originalAdminKey = process.env.ADMIN_API_KEY;
    process.env.ADMIN_API_KEY = ADMIN_KEY;

    // Set up key mocks
    const keys = await import("../services/keys.js");
    vi.mocked(keys.isValidKey).mockImplementation((k: string) => k === TEST_KEY || k === ADMIN_KEY);
    vi.mocked(keys.getKeyInfo).mockImplementation((k: string) => {
      if (k === TEST_KEY) return { key: TEST_KEY, tier: "free" as const, email: "test@test.com", createdAt: "2026-01-01" };
      if (k === ADMIN_KEY) return { key: ADMIN_KEY, tier: "pro" as const, email: "admin@test.com", createdAt: "2026-01-01" };
      return undefined;
    });
    vi.mocked(keys.isProKey).mockImplementation((k: string) => k === ADMIN_KEY);

    const { adminRouter } = await import("../routes/admin.js");
    app = express();
    app.use(express.json());
    app.use(adminRouter);
  });

  afterEach(() => {
    if (originalAdminKey !== undefined) {
      process.env.ADMIN_API_KEY = originalAdminKey;
    } else {
      delete process.env.ADMIN_API_KEY;
    }
  });

  describe("GET /v1/usage/me", () => {
    it("returns 401 without auth", async () => {
      const res = await request(app).get("/v1/usage/me");
      expect(res.status).toBe(401);
    });

    it("returns 403 with invalid key", async () => {
      const res = await request(app).get("/v1/usage/me").set("X-API-Key", "bad-key");
      expect(res.status).toBe(403);
    });

    it("returns usage stats with Bearer auth", async () => {
      const res = await request(app).get("/v1/usage/me").set("Authorization", `Bearer ${TEST_KEY}`);
      expect(res.status).toBe(200);
      expect(res.body).toMatchObject({
        used: 10,
        limit: 100,
        plan: "demo",
        month: "2026-03",
      });
    });

    it("returns usage stats with X-API-Key auth", async () => {
      const res = await request(app).get("/v1/usage/me").set("X-API-Key", TEST_KEY);
      expect(res.status).toBe(200);
      expect(res.body.plan).toBe("demo");
    });

    it("returns pro plan for pro key", async () => {
      const res = await request(app).get("/v1/usage/me").set("X-API-Key", ADMIN_KEY);
      expect(res.status).toBe(200);
      expect(res.body).toMatchObject({
        plan: "pro",
        limit: 5000,
      });
    });
  });

  describe("GET /v1/usage (admin)", () => {
    it("returns 401 without auth", async () => {
      const res = await request(app).get("/v1/usage");
      expect(res.status).toBe(401);
    });

    it("returns 403 with non-admin key", async () => {
      const res = await request(app).get("/v1/usage").set("X-API-Key", TEST_KEY);
      expect(res.status).toBe(403);
      expect(res.body.error).toBe("Admin access required");
    });

    it("returns usage stats with admin key", async () => {
      const res = await request(app).get("/v1/usage").set("X-API-Key", ADMIN_KEY);
      expect(res.status).toBe(200);
      expect(res.body).toHaveProperty("test-key");
    });

    it("returns 503 when ADMIN_API_KEY not set", async () => {
      delete process.env.ADMIN_API_KEY;
      const res = await request(app).get("/v1/usage").set("X-API-Key", ADMIN_KEY);
      expect(res.status).toBe(503);
      expect(res.body.error).toBe("Admin access not configured");
    });
  });

  describe("GET /v1/concurrency (admin)", () => {
    it("returns 403 with non-admin key", async () => {
      const res = await request(app).get("/v1/concurrency").set("X-API-Key", TEST_KEY);
      expect(res.status).toBe(403);
    });

    it("returns concurrency stats with admin key", async () => {
      const res = await request(app).get("/v1/concurrency").set("X-API-Key", ADMIN_KEY);
      expect(res.status).toBe(200);
      expect(res.body).toMatchObject({ active: 2, queued: 0, maxConcurrent: 10 });
    });
  });

  describe("POST /admin/cleanup (admin)", () => {
    it("returns 403 with non-admin key", async () => {
      const res = await request(app).post("/admin/cleanup").set("X-API-Key", TEST_KEY);
      expect(res.status).toBe(403);
    });

    it("returns cleanup results with admin key", async () => {
      const { cleanupStaleData } = await import("../services/db.js");
      vi.mocked(cleanupStaleData).mockResolvedValue({ deletedRows: 5 } as any);

      const res = await request(app).post("/admin/cleanup").set("X-API-Key", ADMIN_KEY);
      expect(res.status).toBe(200);
      expect(res.body).toMatchObject({ status: "ok", cleaned: { deletedRows: 5 } });
    });

    it("returns 500 when cleanup fails", async () => {
      const { cleanupStaleData } = await import("../services/db.js");
      vi.mocked(cleanupStaleData).mockRejectedValue(new Error("DB error"));

      const res = await request(app).post("/admin/cleanup").set("X-API-Key", ADMIN_KEY);
      expect(res.status).toBe(500);
      expect(res.body.error).toBe("Cleanup failed");
    });
  });
});