/**
 * login.spec.ts — Phase 19 AUTH-LOCAL-12/15/16
 *
 * Real-login-form e2e tests covering the PWA login gate + form interaction.
 *
 * Strategy (Option C):
 *   The global-setup seeds 'devuser'/'devpass' into local_credentials and the API's
 *   devSessionCookieMiddleware issues a local-session cookie on every /api/* request
 *   under DEV_AUTH_BYPASS=true. The OTHER specs (layout, calendar, lists) rely on that
 *   cookie being present and do NOT clear it — they still reach the authed app unchanged.
 *
 *   This spec runs in a SEPARATE browser context that clears the local-session cookie
 *   (via storageState:'' and explicit cookie-clear) so the real login gate fires. After
 *   verifying the form, it logs in as devuser/devpass to confirm the full round-trip.
 *
 * Specs covered:
 *   1. Navigating to the app while unauthenticated → redirected to /login, brand + form visible
 *   2. Wrong password → single "Incorrect username or password." error message
 *   3. Correct devuser/devpass → navigates into the app (out of /login)
 *
 * Only runs on the desktop/chromium project (Chromium handles local-session cookies
 * consistently; WebKit PWA restrictions are irrelevant here since the login form is
 * a normal web page, not a Home Screen PWA). Other profiles inherit the bypass cookie.
 *
 * Run:
 *   pnpm --filter @familysync/pwa test:e2e --grep "login"
 *   pnpm --filter @familysync/pwa exec playwright test --project=desktop login.spec.ts
 */
import { test, expect, type BrowserContext } from '@playwright/test';

// Selectors derived from 19-UI-SPEC.md Surfaces 3-7 (locked by plan 04 implementation)
const SELECTORS = {
  usernameInput: '#login-username',
  // password input has id="login-password" (UI-SPEC Surface 5)
  passwordInput: '#login-password',
  // Primary submit: role=button with name "Sign in" (UI-SPEC Surface 7)
  submitBtn: 'button[type="submit"]',
  // Error message is in a role="status" element (UI-SPEC Surface 6)
  errorMessage: '[role="status"]',
};

/**
 * Build an unauthenticated browser context by clearing all cookies and storage.
 * The devSessionCookieMiddleware issues a new local-session cookie on each API
 * request, so we need to clear the cookie from the BROWSER side. Navigating to
 * a page that clears the cookie header is the reliable approach in Playwright.
 */
async function makeUnauthContext(
  context: BrowserContext,
  baseURL: string,
): Promise<void> {
  // Clear all cookies (removes the local-session cookie set by prior API calls)
  await context.clearCookies();
  // Also clear localStorage/sessionStorage to avoid any cached auth state
  const page = await context.newPage();
  try {
    // Navigate somewhere to gain origin access, then clear storage
    await page.goto(baseURL, { waitUntil: 'domcontentloaded', timeout: 10_000 }).catch(() => {});
    await page.evaluate(() => {
      try { localStorage.clear(); } catch { /* cross-origin or unavailable */ }
      try { sessionStorage.clear(); } catch { /* cross-origin or unavailable */ }
    });
  } finally {
    await page.close();
  }
}

// Only run these specs on the desktop profile. The login form is a standard web
// page (not PWA-specific) and Chromium handles cookies most consistently for this test.
// iphone/pixel still reach the authed app via the bypass-issued cookie (unchanged behavior).
test.describe('Login form — real auth round-trip (desktop/Chromium only)', () => {
  test.skip(
    ({ browserName }) => browserName !== 'chromium',
    'Login form tests only run on Chromium (desktop profile) — other profiles use the bypass cookie',
  );

  test('unauthenticated navigation → /login gate: brand slot and form visible', async ({
    page,
    context,
    baseURL,
  }) => {
    // Start from a clean state — no local-session cookie
    await context.clearCookies();

    // Navigate to the app root; the PWA login gate should redirect to /login
    await page.goto(baseURL ?? 'http://localhost:5173', { waitUntil: 'networkidle' });

    // Assert we are on the /login route
    await expect(page).toHaveURL(/\/login/);

    // Brand slot: "FamilySync" text should be visible (UI-SPEC Surface 2)
    await expect(page.getByText('FamilySync', { exact: true })).toBeVisible();

    // Login card heading "Sign in" (UI-SPEC Surface 3)
    await expect(page.getByRole('heading', { name: 'Sign in' })).toBeVisible();

    // Username field (UI-SPEC Surface 4)
    await expect(page.locator(SELECTORS.usernameInput)).toBeVisible();

    // Password field (UI-SPEC Surface 5)
    await expect(page.locator(SELECTORS.passwordInput)).toBeVisible();

    // Submit button (UI-SPEC Surface 7)
    await expect(page.getByRole('button', { name: 'Sign in' })).toBeVisible();
  });

  test('wrong password shows single "Incorrect username or password." error', async ({
    page,
    context,
  }) => {
    await context.clearCookies();

    await page.goto('/login', { waitUntil: 'domcontentloaded' });

    // Fill in wrong credentials
    await page.locator(SELECTORS.usernameInput).fill('devuser');
    await page.locator(SELECTORS.passwordInput).fill('wrongpassword');
    await page.getByRole('button', { name: 'Sign in' }).click();

    // Error message appears (UI-SPEC Surface 6 — "Incorrect username or password.")
    const errorEl = page.locator(SELECTORS.errorMessage);
    await expect(errorEl).toBeVisible({ timeout: 5_000 });
    await expect(errorEl).toContainText('Incorrect username or password.');

    // Still on /login
    await expect(page).toHaveURL(/\/login/);
  });

  test('correct devuser/devpass logs in and navigates out of /login', async ({
    page,
    context,
  }) => {
    await context.clearCookies();

    await page.goto('/login', { waitUntil: 'domcontentloaded' });

    // Fill in the seeded dev credentials (global-setup seeds devuser/devpass)
    await page.locator(SELECTORS.usernameInput).fill('devuser');
    await page.locator(SELECTORS.passwordInput).fill('devpass');
    await page.getByRole('button', { name: 'Sign in' }).click();

    // After login, the page navigates away from /login (to / or /calendar)
    await expect(page).not.toHaveURL(/\/login/, { timeout: 10_000 });
  });
});