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

// Mock heavy deps so we don't need DB
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().mockReturnValue(false),
  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({}),
  getUsageForKey: vi.fn().mockReturnValue({ count: 0, monthKey: "2026-03" }),
  flushDirtyEntries: vi.fn(),
}));

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

describe("Pages integration tests", () => {
  let app: express.Express;

  // Use a fresh import per suite to avoid cross-test pollution
  beforeAll(async () => {
    const { pagesRouter } = await import("../routes/pages.js");
    app = express();
    app.use(pagesRouter);
  });

  describe("GET /favicon.ico", () => {
    it("returns SVG with correct Content-Type and Cache-Control", async () => {
      const res = await request(app).get("/favicon.ico");
      expect(res.status).toBe(200);
      expect(res.headers["content-type"]).toMatch(/image\/svg\+xml/);
      expect(res.headers["cache-control"]).toContain("public");
      expect(res.headers["cache-control"]).toContain("max-age=604800");
    });
  });

  describe("GET /openapi.json", () => {
    it("returns valid JSON with paths", async () => {
      const res = await request(app).get("/openapi.json");
      expect(res.status).toBe(200);
      expect(res.headers["content-type"]).toMatch(/json/);
      expect(res.body.paths).toBeDefined();
      expect(typeof res.body.paths).toBe("object");
    });
  });

  describe("GET /docs", () => {
    it("returns HTML with CSP header", async () => {
      const res = await request(app).get("/docs");
      expect(res.status).toBe(200);
      expect(res.headers["content-type"]).toMatch(/html/);
      expect(res.headers["content-security-policy"]).toBeDefined();
      expect(res.headers["content-security-policy"]).toContain("unsafe-eval");
      expect(res.headers["cache-control"]).toContain("max-age=86400");
    });
  });

  describe("GET /", () => {
    it("returns HTML with Cache-Control", async () => {
      const res = await request(app).get("/");
      expect(res.status).toBe(200);
      expect(res.headers["content-type"]).toMatch(/html/);
      expect(res.headers["cache-control"]).toContain("public");
      expect(res.headers["cache-control"]).toContain("max-age=3600");
    });
  });

  describe("Static pages", () => {
    const pages = ["/impressum", "/privacy", "/terms", "/examples"];

    for (const page of pages) {
      it(`GET ${page} returns 200 with 24h cache`, async () => {
        const res = await request(app).get(page);
        expect(res.status).toBe(200);
        expect(res.headers["cache-control"]).toContain("public");
        expect(res.headers["cache-control"]).toContain("max-age=86400");
      });
    }
  });

  describe("GET /status", () => {
    it("returns 200 with short cache", async () => {
      const res = await request(app).get("/status");
      expect(res.status).toBe(200);
      expect(res.headers["cache-control"]).toContain("max-age=60");
    });
  });

  describe("GET /api", () => {
    it("returns JSON with version and endpoints", async () => {
      const res = await request(app).get("/api");
      expect(res.status).toBe(200);
      expect(res.headers["content-type"]).toMatch(/json/);
      expect(res.body.name).toBe("DocFast API");
      expect(typeof res.body.version).toBe("string");
      expect(Array.isArray(res.body.endpoints)).toBe(true);
      expect(res.body.endpoints.length).toBeGreaterThan(0);
    });
  });
});