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

let app: express.Express;

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

  const { isEmailVerified, createPendingVerification, verifyCode } = await import("../services/verification.js");
  const { sendVerificationEmail } = await import("../services/email.js");
  const { createFreeKey } = await import("../services/keys.js");

  vi.mocked(isEmailVerified).mockResolvedValue(false);
  vi.mocked(createPendingVerification).mockResolvedValue({ email: "test@test.com", code: "123456", createdAt: "", expiresAt: "", attempts: 0 });
  vi.mocked(verifyCode).mockResolvedValue({ status: "ok" });
  vi.mocked(createFreeKey).mockResolvedValue({ key: "free-key-123", tier: "free", email: "test@test.com", createdAt: "" });

  vi.mocked(sendVerificationEmail).mockResolvedValue(true);

  const { signupRouter } = await import("../routes/signup.js");
  app = express();
  app.use(express.json());
  app.use("/signup", signupRouter);
});

describe("POST /signup/free", () => {
  it("returns 400 for missing email", async () => {
    const res = await request(app).post("/signup/free").send({});
    expect(res.status).toBe(400);
  });

  it("returns 400 for invalid email format", async () => {
    const res = await request(app).post("/signup/free").send({ email: "not-email" });
    expect(res.status).toBe(400);
  });

  it("returns 409 for already verified email", async () => {
    const { isEmailVerified } = await import("../services/verification.js");
    vi.mocked(isEmailVerified).mockResolvedValue(true);
    const res = await request(app).post("/signup/free").send({ email: "dup@test.com" });
    expect(res.status).toBe(409);
  });

  it("returns 200 with verification_required for valid email", async () => {
    const res = await request(app).post("/signup/free").send({ email: "new@test.com" });
    expect(res.status).toBe(200);
    expect(res.body.status).toBe("verification_required");
  });

  it("sends verification email asynchronously", async () => {
    const { sendVerificationEmail } = await import("../services/email.js");
    await request(app).post("/signup/free").send({ email: "new@test.com" });
    await new Promise(r => setTimeout(r, 50));
    expect(sendVerificationEmail).toHaveBeenCalledWith("new@test.com", "123456");
  });
});

describe("POST /signup/verify", () => {
  it("returns 400 for missing email/code", async () => {
    const res = await request(app).post("/signup/verify").send({ email: "a@b.com" });
    expect(res.status).toBe(400);
  });

  it("returns 409 for already verified email", async () => {
    const { isEmailVerified } = await import("../services/verification.js");
    vi.mocked(isEmailVerified).mockResolvedValue(true);
    const res = await request(app).post("/signup/verify").send({ email: "dup@test.com", code: "123456" });
    expect(res.status).toBe(409);
  });

  it("returns 410 for expired code", async () => {
    const { verifyCode } = await import("../services/verification.js");
    vi.mocked(verifyCode).mockResolvedValue({ status: "expired" });
    const res = await request(app).post("/signup/verify").send({ email: "a@b.com", code: "123456" });
    expect(res.status).toBe(410);
  });

  it("returns 429 for max attempts", async () => {
    const { verifyCode } = await import("../services/verification.js");
    vi.mocked(verifyCode).mockResolvedValue({ status: "max_attempts" });
    const res = await request(app).post("/signup/verify").send({ email: "a@b.com", code: "123456" });
    expect(res.status).toBe(429);
  });

  it("returns 400 for invalid code", async () => {
    const { verifyCode } = await import("../services/verification.js");
    vi.mocked(verifyCode).mockResolvedValue({ status: "invalid" });
    const res = await request(app).post("/signup/verify").send({ email: "a@b.com", code: "999999" });
    expect(res.status).toBe(400);
  });

  it("returns 200 with apiKey for valid code", async () => {
    const res = await request(app).post("/signup/verify").send({ email: "a@b.com", code: "123456" });
    expect(res.status).toBe(200);
    expect(res.body).toMatchObject({ status: "verified", apiKey: "free-key-123" });
  });
});