import { test, expect, Page, APIRequestContext } from "@playwright/test";

// Helper to generate unique email for each test
function uniqueEmail(): string {
  return `test-${Date.now()}-${Math.random().toString(36).substring(7)}@example.com`;
}

// Helper to clear auth cookies
async function clearAuth(page: Page) {
  await page.context().clearCookies();
}

// Admin credentials from seed data
const ADMIN_EMAIL = "admin@example.com";
const ADMIN_PASSWORD = "admin123";

// Helper to create an invite via the API
const API_BASE = process.env.NEXT_PUBLIC_API_URL || "http://localhost:8000";

async function createInvite(request: APIRequestContext): Promise<string> {
  // Login as admin
  const loginResp = await request.post(`${API_BASE}/api/auth/login`, {
    data: { email: ADMIN_EMAIL, password: ADMIN_PASSWORD },
  });
  const cookies = loginResp.headers()["set-cookie"];

  // Get admin user ID (we'll use admin as godfather for simplicity)
  const meResp = await request.get(`${API_BASE}/api/auth/me`, {
    headers: { Cookie: cookies },
  });
  const admin = await meResp.json();

  // Create invite
  const inviteResp = await request.post(`${API_BASE}/api/admin/invites`, {
    data: { godfather_id: admin.id },
    headers: { Cookie: cookies },
  });
  const invite = await inviteResp.json();
  return invite.identifier;
}

test.describe("Authentication Flow", () => {
  test.beforeEach(async ({ page }) => {
    await clearAuth(page);
  });

  test("redirects to login when not authenticated and auth pages have correct UI", async ({
    page,
  }) => {
    // Test redirect
    await page.goto("/");
    await expect(page).toHaveURL("/login");

    // Test login page UI
    await page.goto("/login");
    await expect(page.locator("h1")).toHaveText("Welcome back");
    await expect(page.locator('input[type="email"]')).toBeVisible();
    await expect(page.locator('input[type="password"]')).toBeVisible();
    await expect(page.locator('button[type="submit"]')).toHaveText("Sign in");
    await expect(page.locator('a[href="/signup"]')).toBeVisible();

    // Test navigation to signup
    await page.click('a[href="/signup"]');
    await expect(page).toHaveURL("/signup");

    // Test signup page UI
    await expect(page.locator("h1")).toHaveText("Join with Invite");
    await expect(page.locator("input#inviteCode")).toBeVisible();
    await expect(page.locator('button[type="submit"]')).toHaveText("Continue");
    await expect(page.locator('a[href="/login"]')).toBeVisible();

    // Test navigation back to login
    await page.click('a[href="/login"]');
    await expect(page).toHaveURL("/login");
  });
});

test.describe("Signup with Invite", () => {
  test.beforeEach(async ({ page }) => {
    await clearAuth(page);
  });

  test("can create account with valid invite via form and direct URL, and logged-in users are redirected", async ({
    page,
    request,
  }) => {
    // Test signup via form
    const email1 = uniqueEmail();
    const inviteCode1 = await createInvite(request);

    await page.goto("/signup");
    await page.fill("input#inviteCode", inviteCode1);
    await page.click('button[type="submit"]');
    await expect(page.locator("h1")).toHaveText("Create account");

    await page.fill("input#email", email1);
    await page.fill("input#password", "password123");
    await page.fill("input#confirmPassword", "password123");
    await page.click('button[type="submit"]');
    await expect(page).toHaveURL("/exchange");
    await expect(page.getByRole("heading", { name: "Exchange Bitcoin" })).toBeVisible();

    // Test logged-in user visiting invite URL - should redirect to exchange
    const anotherInvite = await createInvite(request);
    await page.goto(`/signup/${anotherInvite}`);
    await expect(page).toHaveURL("/exchange");

    // Test logged-in user visiting signup page - should redirect to exchange
    await page.goto("/signup");
    await expect(page).toHaveURL("/exchange");

    // Test signup via direct URL (new session)
    await clearAuth(page);
    const email2 = uniqueEmail();
    const inviteCode2 = await createInvite(request);

    await page.goto(`/signup/${inviteCode2}`);
    await page.waitForURL(/\/signup\?code=/);
    await expect(page.locator("h1")).toHaveText("Create account");

    await page.fill("input#email", email2);
    await page.fill("input#password", "password123");
    await page.fill("input#confirmPassword", "password123");
    await page.click('button[type="submit"]');
    await expect(page).toHaveURL("/exchange");
  });

  test("shows errors for invalid invite code and password validation", async ({
    page,
    request,
  }) => {
    // Test invalid invite code
    await page.goto("/signup");
    await page.fill("input#inviteCode", "fake-code-99");
    await page.click('button[type="submit"]');
    await expect(page.getByText(/not found/i)).toBeVisible();

    // Test password validation with valid invite
    const inviteCode = await createInvite(request);
    await page.goto("/signup");
    await page.fill("input#inviteCode", inviteCode);
    await page.click('button[type="submit"]');
    await expect(page.locator("h1")).toHaveText("Create account");

    // Test password mismatch
    await page.fill("input#email", uniqueEmail());
    await page.fill("input#password", "password123");
    await page.fill("input#confirmPassword", "differentpassword");
    await page.click('button[type="submit"]');
    await expect(page.getByText("Passwords do not match")).toBeVisible();

    // Test short password
    await page.fill("input#email", uniqueEmail());
    await page.fill("input#password", "short");
    await page.fill("input#confirmPassword", "short");
    await page.click('button[type="submit"]');
    await expect(page.getByText("Password must be at least 6 characters")).toBeVisible();
  });
});

test.describe("Login", () => {
  let testEmail: string;
  const testPassword = "testpassword123";

  test.beforeAll(async ({ request }) => {
    // Create a test user with invite
    testEmail = uniqueEmail();
    const inviteCode = await createInvite(request);

    // Register the test user via backend API
    await request.post(`${API_BASE}/api/auth/register`, {
      data: {
        email: testEmail,
        password: testPassword,
        invite_identifier: inviteCode,
      },
    });
  });

  test.beforeEach(async ({ page }) => {
    await clearAuth(page);
  });

  test("can login with valid credentials and shows loading state", async ({ page }) => {
    // Test loading state
    await page.goto("/login");
    await page.fill('input[type="email"]', testEmail);
    await page.fill('input[type="password"]', testPassword);

    const submitPromise = page.click('button[type="submit"]');
    await expect(page.locator('button[type="submit"]')).toHaveText("Signing in...");
    await submitPromise;

    // Regular user redirects to exchange
    await expect(page).toHaveURL("/exchange");
    await expect(page.getByRole("heading", { name: "Exchange Bitcoin" })).toBeVisible();
  });

  test("shows error for wrong password and non-existent user", async ({ page }) => {
    // Test wrong password
    await page.goto("/login");
    await page.fill('input[type="email"]', testEmail);
    await page.fill('input[type="password"]', "wrongpassword");
    await page.click('button[type="submit"]');
    await expect(page.getByText("Incorrect email or password")).toBeVisible();

    // Test non-existent user
    await page.goto("/login");
    await page.fill('input[type="email"]', "nonexistent@example.com");
    await page.fill('input[type="password"]', "password123");
    await page.click('button[type="submit"]');
    await expect(page.getByText("Incorrect email or password")).toBeVisible();
  });
});

test.describe("Logout", () => {
  test("can logout and cannot access protected pages after logout", async ({ page, request }) => {
    const email = uniqueEmail();
    const inviteCode = await createInvite(request);

    // Sign up
    await page.goto("/signup");
    await page.fill("input#inviteCode", inviteCode);
    await page.click('button[type="submit"]');
    await expect(page.locator("h1")).toHaveText("Create account");

    await page.fill("input#email", email);
    await page.fill("input#password", "password123");
    await page.fill("input#confirmPassword", "password123");
    await page.click('button[type="submit"]');
    await expect(page).toHaveURL("/exchange");

    // Click logout
    await page.click("text=Sign out");
    await expect(page).toHaveURL("/login");

    // Try to access exchange (protected page)
    await page.goto("/exchange");
    await expect(page).toHaveURL("/login");
  });
});

test.describe("Session Persistence", () => {
  test("session persists after page reload and cookies are managed correctly", async ({
    page,
    request,
  }) => {
    const email = uniqueEmail();
    const inviteCode = await createInvite(request);

    // Sign up
    await page.goto("/signup");
    await page.fill("input#inviteCode", inviteCode);
    await page.click('button[type="submit"]');
    await expect(page.locator("h1")).toHaveText("Create account");

    await page.fill("input#email", email);
    await page.fill("input#password", "password123");
    await page.fill("input#confirmPassword", "password123");
    await page.click('button[type="submit"]');
    await expect(page).toHaveURL("/exchange");
    await expect(page.getByRole("heading", { name: "Exchange Bitcoin" })).toBeVisible();

    // Check cookies are set after signup
    let cookies = await page.context().cookies();
    let authCookie = cookies.find((c) => c.name === "auth_token");
    expect(authCookie).toBeTruthy();
    expect(authCookie!.httpOnly).toBe(true);

    // Reload page - session should persist
    await page.reload();
    await expect(page).toHaveURL("/exchange");
    await expect(page.getByRole("heading", { name: "Exchange Bitcoin" })).toBeVisible();

    // Logout and verify cookie is cleared
    await page.click("text=Sign out");
    await expect(page).toHaveURL("/login");

    cookies = await page.context().cookies();
    authCookie = cookies.find((c) => c.name === "auth_token");
    expect(!authCookie || authCookie.value === "").toBe(true);
  });
});