import { test, expect } from '@playwright/test';

/**
 * E2E Test: Session Persistence Across Browser Restarts
 *
 * User Story: US4 - Session Persistence
 * Task: T011
 *
 * **Purpose**: Verify that authenticated users remain logged in after page reload
 *
 * **Acceptance Criteria**:
 * - AC-1: After login, user reloads page and remains on /dashboard (not redirected to /login)
 * - AC-2: After reload, user name is still visible in navbar
 * - AC-3: After reload, user can still access protected pages
 *
 * **Technical Implementation**:
 * - Tests rely on Pocketbase authStore persistence via localStorage
 * - initAuth() composable function restores session on mount via auth plugin
 * - Auth state is synchronized via pb.authStore.onChange listener
 *
 * **Test Flow**:
 * 1. Navigate to /login
 * 2. Authenticate via OAuth (mock provider)
 * 3. Verify redirect to /dashboard
 * 4. Verify user name visible in navbar
 * 5. Reload page
 * 6. Verify still on /dashboard (no redirect to /login)
 * 7. Verify user name still visible in navbar
 *
 * **Notes**:
 * - Requires Pocketbase OAuth mock provider configured for testing
 * - May need to configure test-specific OAuth provider or use Pocketbase test mode
 * - Session persistence depends on valid auth token not being expired
 */

test.describe('Session Persistence', () => {
  test.beforeEach(async ({ page }) => {
    // Clear any existing auth state before each test
    await page.context().clearCookies();
    await page.evaluate(() => localStorage.clear());
  });

  test('should maintain authentication after page reload', async ({ page }) => {
    // Step 1: Navigate to login page
    await page.goto('/login');
    await expect(page).toHaveURL('/login');

    // Step 2: Authenticate via OAuth
    // NOTE: This requires a mock OAuth provider configured in Pocketbase for testing
    // The actual implementation will depend on the test environment setup
    // For now, this is a placeholder that documents the expected flow

    // TODO: Replace with actual OAuth flow once test provider is configured
    // Example mock implementation:
    // await page.click('[data-testid="oauth-google"]');
    // await page.waitForURL('/dashboard');

    // Placeholder: Simulate successful OAuth by setting auth state directly
    await page.evaluate(() => {
      // Mock Pocketbase authStore for testing
      const mockAuthData = {
        token: 'mock-jwt-token',
        record: {
          id: 'test-user-id',
          email: 'test@example.com',
          name: 'Test User',
          emailVisibility: false,
          verified: true,
          avatar: '',
          created: new Date().toISOString(),
          updated: new Date().toISOString()
        }
      };
      localStorage.setItem('pocketbase_auth', JSON.stringify(mockAuthData));
    });

    // Navigate to dashboard to trigger auth restoration
    await page.goto('/dashboard');
    await expect(page).toHaveURL('/dashboard');

    // Step 3: Verify user is authenticated - check for user name in navbar
    // NOTE: Adjust selector based on actual navbar implementation
    const userNameElement = page.locator('[data-testid="user-name"]').or(
      page.locator('text=Test User')
    );
    await expect(userNameElement).toBeVisible({ timeout: 5000 });

    // Step 4: Reload the page
    await page.reload();

    // Step 5: Verify still on /dashboard (session persisted)
    await expect(page).toHaveURL('/dashboard');

    // Step 6: Verify user name still visible after reload
    await expect(userNameElement).toBeVisible({ timeout: 5000 });
  });

  test('should persist session across browser context restarts', async ({ browser }) => {
    // Create initial context and authenticate
    const context1 = await browser.newContext();
    const page1 = await context1.newPage();

    await page1.goto('/login');

    // Simulate OAuth authentication
    await page1.evaluate(() => {
      const mockAuthData = {
        token: 'mock-jwt-token',
        record: {
          id: 'test-user-id',
          email: 'test@example.com',
          name: 'Test User',
          emailVisibility: false,
          verified: true,
          avatar: '',
          created: new Date().toISOString(),
          updated: new Date().toISOString()
        }
      };
      localStorage.setItem('pocketbase_auth', JSON.stringify(mockAuthData));
    });

    await page1.goto('/dashboard');
    await expect(page1).toHaveURL('/dashboard');

    // Extract storage state to simulate browser restart
    const storageState = await context1.storageState();
    await context1.close();

    // Create new context with stored state (simulates browser restart)
    const context2 = await browser.newContext({ storageState });
    const page2 = await context2.newPage();

    // Navigate directly to dashboard
    await page2.goto('/dashboard');

    // Verify session persisted - should not redirect to /login
    await expect(page2).toHaveURL('/dashboard');

    // Verify user info still available
    const userNameElement = page2.locator('[data-testid="user-name"]').or(
      page2.locator('text=Test User')
    );
    await expect(userNameElement).toBeVisible({ timeout: 5000 });

    await context2.close();
  });

  test('should redirect to login when accessing protected page without session', async ({ page }) => {
    // Ensure no auth state exists
    await page.goto('/');
    await page.evaluate(() => localStorage.clear());

    // Try to access protected page
    await page.goto('/dashboard');

    // Should redirect to login with redirect parameter
    await expect(page).toHaveURL(/\/login\?redirect=.*dashboard/);
  });

  test('should restore session and allow access to other protected pages', async ({ page }) => {
    // Set up authenticated session
    await page.goto('/login');
    await page.evaluate(() => {
      const mockAuthData = {
        token: 'mock-jwt-token',
        record: {
          id: 'test-user-id',
          email: 'test@example.com',
          name: 'Test User',
          emailVisibility: false,
          verified: true,
          avatar: '',
          created: new Date().toISOString(),
          updated: new Date().toISOString()
        }
      };
      localStorage.setItem('pocketbase_auth', JSON.stringify(mockAuthData));
    });

    await page.goto('/dashboard');
    await expect(page).toHaveURL('/dashboard');

    // Reload to test session persistence
    await page.reload();
    await expect(page).toHaveURL('/dashboard');

    // Navigate to other protected pages
    // NOTE: Adjust these based on actual application routes
    // await page.goto('/projects');
    // await expect(page).toHaveURL('/projects');

    // await page.goto('/tasks');
    // await expect(page).toHaveURL('/tasks');
  });
});

/**
 * IMPLEMENTATION NOTES FOR TEST SETUP:
 *
 * 1. **Playwright Configuration Required**:
 *    - Create `playwright.config.ts` in project root
 *    - Configure base URL to match dev server (http://localhost:3000)
 *    - Set up test fixtures for Pocketbase mock
 *
 * 2. **Pocketbase Test Provider Setup**:
 *    Option A: Use Pocketbase test mode with mock OAuth provider
 *    Option B: Create test-specific OAuth provider (e.g., test-provider)
 *    Option C: Mock OAuth at network level using Playwright's route interception
 *
 * 3. **Mock OAuth Flow** (Recommended Approach):
 *    ```typescript
 *    await page.route('**/api/collections/users/auth-with-oauth2', async route => {
 *      await route.fulfill({
 *        status: 200,
 *        body: JSON.stringify({
 *          token: 'mock-jwt',
 *          record: { ... }
 *        })
 *      });
 *    });
 *    ```
 *
 * 4. **Data Test IDs**:
 *    Add the following to components:
 *    - Navbar user name: `data-testid="user-name"`
 *    - OAuth provider buttons: `data-testid="oauth-{provider}"`
 *    - Logout button: `data-testid="logout-button"`
 *
 * 5. **Running Tests**:
 *    - Install Playwright: `pnpm add -D @playwright/test`
 *    - Add to package.json: `"test:e2e": "playwright test"`
 *    - Run: `pnpm test:e2e`
 */