import { Test, TestingModule } from "@nestjs/testing";
import { INestApplication, ValidationPipe } from "@nestjs/common";
import { AppModule } from "@/src/app.module";

const request = require("supertest");

/**
 * E2E Tests for Session Lifecycle Management
 *
 * Tests cover:
 * - Session creation on login/register
 * - Session validation across multiple requests
 * - Session refresh (TTL extension)
 * - Session invalidation on logout
 * - Multiple concurrent sessions
 * - Session persistence across requests (Redis)
 * - Account lockout after failed attempts
 */
describe("Session Lifecycle (e2e)", () => {
  let app: INestApplication;

  const testUser = {
    email: `session-e2e-${Date.now()}@example.com`,
    username: `sessionuser${Date.now()}`,
    password: "SecureSession123!",
  };

  beforeAll(async () => {
    const moduleFixture: TestingModule = await Test.createTestingModule({
      imports: [AppModule],
    }).compile();

    app = moduleFixture.createNestApplication();
    app.useGlobalPipes(
      new ValidationPipe({
        whitelist: true,
        transform: true,
        forbidNonWhitelisted: true,
      }),
    );
    await app.init();

    // Register test user
    await request(app.getHttpServer())
      .post("/auth/register")
      .send(testUser);
  });

  afterAll(async () => {
    await app.close();
  });

  describe("Session Creation", () => {
    it("should create session on successful registration", async () => {
      const uniqueUser = {
        email: `session-reg-${Date.now()}@example.com`,
        username: `sessionreg${Date.now()}`,
        password: "SecurePass123!",
      };

      const res = await request(app.getHttpServer())
        .post("/auth/register")
        .send(uniqueUser)
        .expect(200);

      expect(res.body.sessionId).toBeDefined();
      expect(res.body.sessionId.length).toBeGreaterThan(10);
      expect(res.body.user).toBeDefined();
      expect(res.body.user.email).toBe(uniqueUser.email);
    });

    it("should create session on successful login", async () => {
      const res = await request(app.getHttpServer())
        .post("/auth/login")
        .send({
          email: testUser.email,
          password: testUser.password,
        })
        .expect(200);

      expect(res.body.sessionId).toBeDefined();
      expect(res.body.user).toBeDefined();
    });
  });

  describe("Multiple Concurrent Sessions", () => {
    it("should support multiple active sessions for same user", async () => {
      // Create two sessions
      const login1 = await request(app.getHttpServer())
        .post("/auth/login")
        .send({ email: testUser.email, password: testUser.password })
        .expect(200);

      const login2 = await request(app.getHttpServer())
        .post("/auth/login")
        .send({ email: testUser.email, password: testUser.password })
        .expect(200);

      const token1 = login1.body.sessionId;
      const token2 = login2.body.sessionId;

      // Both sessions should be different
      expect(token1).not.toBe(token2);

      // Both should be valid
      await request(app.getHttpServer())
        .get("/auth/validate")
        .set("Authorization", `Bearer ${token1}`)
        .expect(200);

      await request(app.getHttpServer())
        .get("/auth/validate")
        .set("Authorization", `Bearer ${token2}`)
        .expect(200);
    });

    it("should only invalidate specific session on logout", async () => {
      const login1 = await request(app.getHttpServer())
        .post("/auth/login")
        .send({ email: testUser.email, password: testUser.password })
        .expect(200);

      const login2 = await request(app.getHttpServer())
        .post("/auth/login")
        .send({ email: testUser.email, password: testUser.password })
        .expect(200);

      const token1 = login1.body.sessionId;
      const token2 = login2.body.sessionId;

      // Logout session 1
      await request(app.getHttpServer())
        .post("/auth/logout")
        .set("Authorization", `Bearer ${token1}`)
        .expect(200);

      // Session 1 should be invalid
      await request(app.getHttpServer())
        .get("/auth/validate")
        .set("Authorization", `Bearer ${token1}`)
        .expect(401);

      // Session 2 should still be valid
      await request(app.getHttpServer())
        .get("/auth/validate")
        .set("Authorization", `Bearer ${token2}`)
        .expect(200);
    });
  });

  describe("Session Refresh", () => {
    it("should refresh session TTL", async () => {
      const loginRes = await request(app.getHttpServer())
        .post("/auth/login")
        .send({ email: testUser.email, password: testUser.password })
        .expect(200);

      const token = loginRes.body.sessionId;

      // Refresh session
      await request(app.getHttpServer())
        .post("/auth/refresh")
        .set("Authorization", `Bearer ${token}`)
        .expect(200)
        .expect((res) => {
          expect(res.body.success).toBe(true);
        });

      // Session should still be valid after refresh
      await request(app.getHttpServer())
        .get("/auth/validate")
        .set("Authorization", `Bearer ${token}`)
        .expect(200);
    });
  });

  describe("Session Data Consistency", () => {
    it("should return consistent user data across /validate and /me", async () => {
      const loginRes = await request(app.getHttpServer())
        .post("/auth/login")
        .send({ email: testUser.email, password: testUser.password })
        .expect(200);

      const token = loginRes.body.sessionId;

      const validateRes = await request(app.getHttpServer())
        .get("/auth/validate")
        .set("Authorization", `Bearer ${token}`)
        .expect(200);

      const meRes = await request(app.getHttpServer())
        .get("/auth/me")
        .set("Authorization", `Bearer ${token}`)
        .expect(200);

      // Both endpoints should return same user data
      expect(validateRes.body.user.email).toBe(meRes.body.user.email);
      expect(validateRes.body.user.username).toBe(meRes.body.user.username);
      expect(validateRes.body.user.id).toBe(meRes.body.user.id);

      // Neither should expose password hash
      expect(validateRes.body.user.passwordHash).toBeUndefined();
      expect(meRes.body.user.passwordHash).toBeUndefined();
    });
  });

  describe("Account Lockout", () => {
    it("should return remaining attempts after failed login", async () => {
      const res = await request(app.getHttpServer())
        .post("/auth/login")
        .send({
          email: testUser.email,
          password: "WrongPassword123!",
        });

      // Should be 401 with remaining attempts info
      expect(res.status).toBe(401);
      if (res.body.remainingAttempts !== undefined) {
        expect(res.body.remainingAttempts).toBeDefined();
      }
    });
  });

  describe("Edge Cases", () => {
    it("should handle empty Authorization header", () => {
      return request(app.getHttpServer())
        .get("/auth/validate")
        .set("Authorization", "")
        .expect(401);
    });

    it("should handle malformed Bearer token", () => {
      return request(app.getHttpServer())
        .get("/auth/validate")
        .set("Authorization", "Bearer ")
        .expect(401);
    });

    it("should handle non-Bearer auth scheme", () => {
      return request(app.getHttpServer())
        .get("/auth/validate")
        .set("Authorization", "Basic dXNlcjpwYXNz")
        .expect(401);
    });
  });
});