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

/**
 * Comprehensive E2E Test Suite for HVAC Community Events Plugin
 * 
 * This test suite covers all user-facing pages and navigation flows:
 * - Login flow
 * - All trainer pages (/trainer/ hierarchy)
 * - All master trainer pages (/master-trainer/ hierarchy)  
 * - Navigation between pages
 * - Authentication and authorization
 * - Visual verification via screenshots
 */

// Test users configuration
const TEST_USERS = {
  trainer: {
    username: 'test_trainer',
    password: 'password123',
    email: 'test_trainer@example.com'
  },
  masterTrainer: {
    username: 'devadmin',
    password: 'devadmin123',
    email: 'admin@example.com'
  }
};

// Page URLs to test
const TRAINER_PAGES = [
  { url: '/trainer/dashboard/', title: 'Trainer Dashboard', description: 'Personal trainer dashboard with stats' },
  { url: '/trainer/my-profile/', title: 'Trainer Profile', description: 'View and edit trainer profile' },
  { url: '/trainer/registration/', title: 'Trainer Registration', description: 'New trainer registration form' },
  { url: '/trainer/documentation/', title: 'Trainer Documentation', description: 'Help and documentation' },
  { url: '/trainer/event/manage/', title: 'Manage Event', description: 'Create and edit events' },
  { url: '/trainer/event/summary/', title: 'Event Summary', description: 'Event details and attendee management' },
  { url: '/trainer/email-attendees/', title: 'Email Attendees', description: 'Send emails to attendees' },
  { url: '/trainer/certificate-reports/', title: 'Certificate Reports', description: 'View issued certificates' },
  { url: '/trainer/generate-certificates/', title: 'Generate Certificates', description: 'Create new certificates' },
  { url: '/trainer/communication-templates/', title: 'Communication Templates', description: 'Manage email templates' },
  { url: '/trainer/communication-schedules/', title: 'Communication Schedules', description: 'Schedule automated communications' },
  { url: '/trainer/attendee-profile/', title: 'Attendee Profile', description: 'View attendee profiles' }
];

const MASTER_TRAINER_PAGES = [
  { url: '/master-trainer/dashboard/', title: 'Master Dashboard', description: 'System-wide analytics and management' },
  { url: '/master-trainer/google-sheets/', title: 'Google Sheets Integration', description: 'Google Sheets integration' },
  { url: '/master-trainer/certificate-fix/', title: 'Certificate System Diagnostics', description: 'Certificate diagnostics (restricted)' }
];

const AUTH_PAGES = [
  { url: '/training-login/', title: 'Trainer Login', description: 'Login page for all trainers' }
];

// Helper functions
async function loginAsUser(page: Page, userType: 'trainer' | 'masterTrainer') {
  const user = TEST_USERS[userType];
  
  // Navigate to login page
  await page.goto('/training-login/');
  await expect(page).toHaveTitle(/Login|Trainer/);
  
  // Fill login form
  await page.fill('input[name="log"], input[type="text"]', user.username);
  await page.fill('input[name="pwd"], input[type="password"]', user.password);
  
  // Submit login
  await page.click('input[type="submit"], button[type="submit"], .login-submit, #wp-submit');
  
  // Wait for redirect to dashboard
  await page.waitForURL('**/trainer/dashboard/**', { timeout: 10000 });
  
  // Verify successful login
  await expect(page.locator('body')).not.toContainText('Invalid username or password');
}

async function takePageScreenshot(page: Page, testName: string, pageName: string) {
  await page.screenshot({
    path: `test-results/screenshots/${testName}-${pageName}.png`,
    fullPage: true
  });
}

async function verifyPageBasicElements(page: Page, expectedTitle: string, description: string) {
  // Wait for page to load
  await page.waitForLoadState('networkidle');
  
  // Check page is accessible (not showing generic error)
  await expect(page.locator('body')).not.toContainText('Page not found');
  await expect(page.locator('body')).not.toContainText('404');
  await expect(page.locator('body')).not.toContainText('Fatal error');
  
  // Check for basic WordPress structure
  const hasWpAdmin = await page.locator('#wpadminbar').isVisible().catch(() => false);
  const hasContent = await page.locator('.entry-content, .content, main, #content').isVisible().catch(() => false);
  
  // At least one should be visible
  expect(hasWpAdmin || hasContent).toBe(true);
  
  // Check for plugin-specific elements
  const hasPluginContent = await page.locator('[class*="hvac"], [id*="hvac"], [class*="community"], [class*="event"]').isVisible().catch(() => false);
  
  // Log findings for debugging
  console.log(`Page: ${expectedTitle} - Has WP Admin: ${hasWpAdmin}, Has Content: ${hasContent}, Has Plugin Content: ${hasPluginContent}`);
}

// Main test suites
test.describe('HVAC Plugin Authentication', () => {
  
  test('Login page loads and displays correctly', async ({ page }) => {
    await page.goto('/training-login/');
    
    // Take screenshot
    await takePageScreenshot(page, 'auth', 'login-page');
    
    // Verify basic elements
    await verifyPageBasicElements(page, 'Trainer Login', 'Login page for all trainers');
    
    // Check for login form elements
    const hasUsernameField = await page.locator('input[name="log"], input[type="text"]').isVisible().catch(() => false);
    const hasPasswordField = await page.locator('input[name="pwd"], input[type="password"]').isVisible().catch(() => false);
    const hasSubmitButton = await page.locator('input[type="submit"], button[type="submit"], .login-submit').isVisible().catch(() => false);
    
    expect(hasUsernameField || hasPasswordField || hasSubmitButton).toBe(true);
    
    console.log(`Login form elements - Username: ${hasUsernameField}, Password: ${hasPasswordField}, Submit: ${hasSubmitButton}`);
  });

  test('Login flow works for trainer', async ({ page }) => {
    await loginAsUser(page, 'trainer');
    
    // Should be redirected to dashboard
    expect(page.url()).toContain('/trainer/dashboard/');
    
    // Take screenshot of successful login
    await takePageScreenshot(page, 'auth', 'trainer-logged-in');
    
    await verifyPageBasicElements(page, 'Trainer Dashboard', 'Post-login dashboard');
  });

  test('Login flow works for master trainer', async ({ page }) => {
    await loginAsUser(page, 'masterTrainer');
    
    // Should be redirected to dashboard
    expect(page.url()).toContain('/trainer/dashboard/');
    
    // Take screenshot of successful login
    await takePageScreenshot(page, 'auth', 'master-trainer-logged-in');
    
    await verifyPageBasicElements(page, 'Trainer Dashboard', 'Post-login dashboard for master trainer');
  });
});

test.describe('HVAC Plugin Trainer Pages', () => {
  
  test.beforeEach(async ({ page }) => {
    await loginAsUser(page, 'trainer');
  });

  for (const pageConfig of TRAINER_PAGES) {
    test(`${pageConfig.title} page loads correctly`, async ({ page }) => {
      await page.goto(pageConfig.url);
      
      // Take screenshot for visual verification
      const screenshotName = pageConfig.title.toLowerCase().replace(/\s+/g, '-');
      await takePageScreenshot(page, 'trainer', screenshotName);
      
      // Verify basic page elements
      await verifyPageBasicElements(page, pageConfig.title, pageConfig.description);
      
      // Check URL is correct
      expect(page.url()).toContain(pageConfig.url);
      
      console.log(`✓ Verified ${pageConfig.title} page at ${pageConfig.url}`);
    });
  }
});

test.describe('HVAC Plugin Master Trainer Pages', () => {
  
  test.beforeEach(async ({ page }) => {
    await loginAsUser(page, 'masterTrainer');
  });

  for (const pageConfig of MASTER_TRAINER_PAGES) {
    test(`${pageConfig.title} page loads correctly`, async ({ page }) => {
      await page.goto(pageConfig.url);
      
      // Take screenshot for visual verification
      const screenshotName = pageConfig.title.toLowerCase().replace(/\s+/g, '-').replace(/[^a-z0-9-]/g, '');
      await takePageScreenshot(page, 'master-trainer', screenshotName);
      
      // Verify basic page elements
      await verifyPageBasicElements(page, pageConfig.title, pageConfig.description);
      
      // Check URL is correct
      expect(page.url()).toContain(pageConfig.url);
      
      console.log(`✓ Verified ${pageConfig.title} page at ${pageConfig.url}`);
    });
  }
});

test.describe('HVAC Plugin Navigation', () => {
  
  test('Dashboard navigation buttons work for trainer', async ({ page }) => {
    await loginAsUser(page, 'trainer');
    
    // Navigate to dashboard
    await page.goto('/trainer/dashboard/');
    await takePageScreenshot(page, 'navigation', 'trainer-dashboard-before-navigation');
    
    // Test navigation to key pages
    const navigationTests = [
      { selector: 'a[href*="manage"], .create-event, [href*="event/manage"]', expectedUrl: '/trainer/event/manage/' },
      { selector: 'a[href*="generate-certificates"], .generate-certificates', expectedUrl: '/trainer/generate-certificates/' },
      { selector: 'a[href*="certificate-reports"], .certificate-reports', expectedUrl: '/trainer/certificate-reports/' },
      { selector: 'a[href*="my-profile"], .profile, [href*="trainer-profile"]', expectedUrl: '/trainer/my-profile/' }
    ];
    
    for (const navTest of navigationTests) {
      // Go back to dashboard
      await page.goto('/trainer/dashboard/');
      
      // Look for navigation element
      const navElement = await page.locator(navTest.selector).first();
      const isVisible = await navElement.isVisible().catch(() => false);
      
      if (isVisible) {
        await navElement.click();
        await page.waitForLoadState('networkidle');
        
        // Verify we navigated correctly
        expect(page.url()).toContain(navTest.expectedUrl);
        
        // Take screenshot
        const pageName = navTest.expectedUrl.split('/').filter(s => s).pop() || 'unknown';
        await takePageScreenshot(page, 'navigation', `navigated-to-${pageName}`);
        
        console.log(`✓ Navigation to ${navTest.expectedUrl} successful`);
      } else {
        console.log(`! Navigation element not found for ${navTest.expectedUrl}: ${navTest.selector}`);
      }
    }
  });

  test('Master trainer can access restricted pages', async ({ page }) => {
    await loginAsUser(page, 'masterTrainer');
    
    // Navigate to master trainer specific pages
    await page.goto('/master-trainer/dashboard/');
    await takePageScreenshot(page, 'navigation', 'master-dashboard-access');
    
    // Verify access to Google Sheets page
    await page.goto('/master-trainer/google-sheets/');
    await takePageScreenshot(page, 'navigation', 'google-sheets-access');
    
    // These should not show access denied
    await expect(page.locator('body')).not.toContainText('Access denied');
    await expect(page.locator('body')).not.toContainText('Unauthorized');
    
    console.log('✓ Master trainer can access restricted pages');
  });

  test('Regular trainer cannot access master trainer pages', async ({ page }) => {
    await loginAsUser(page, 'trainer');
    
    // Try to access master trainer pages - should be redirected or show error
    await page.goto('/master-trainer/dashboard/');
    
    const isAccessDenied = await page.locator('body').textContent().then(text => 
      text?.includes('Access denied') || 
      text?.includes('Unauthorized') ||
      text?.includes('Permission denied') ||
      page.url().includes('/trainer/dashboard/') // Redirected back
    );
    
    await takePageScreenshot(page, 'navigation', 'trainer-master-access-denied');
    
    // Should either show access denied or redirect to trainer dashboard
    expect(isAccessDenied).toBe(true);
    
    console.log('✓ Regular trainer properly denied access to master trainer pages');
  });
});

test.describe('HVAC Plugin Legacy URL Redirects', () => {
  
  test.beforeEach(async ({ page }) => {
    await loginAsUser(page, 'trainer');
  });

  test('Legacy URLs redirect to new hierarchical structure', async ({ page }) => {
    const legacyRedirects = [
      { from: '/hvac-dashboard/', to: '/trainer/dashboard/' },
      { from: '/manage-event/', to: '/trainer/event/manage/' },
      { from: '/trainer-profile/', to: '/trainer/my-profile/' },
      { from: '/certificate-reports/', to: '/trainer/certificate-reports/' },
      { from: '/generate-certificates/', to: '/trainer/generate-certificates/' }
    ];
    
    for (const redirect of legacyRedirects) {
      await page.goto(redirect.from);
      await page.waitForLoadState('networkidle');
      
      // Should be redirected to new URL
      expect(page.url()).toContain(redirect.to);
      
      await takePageScreenshot(page, 'redirects', `legacy-${redirect.from.replace(/[^a-z0-9]/g, '-')}`);
      
      console.log(`✓ Legacy URL ${redirect.from} redirects to ${redirect.to}`);
    }
  });
});

test.describe('HVAC Plugin Visual Verification', () => {
  
  test('Generate comprehensive visual documentation', async ({ page }) => {
    // Login as trainer
    await loginAsUser(page, 'trainer');
    
    // Take screenshot of each major page for documentation
    const documentationPages = [
      '/trainer/dashboard/',
      '/trainer/event/manage/',
      '/trainer/my-profile/',
      '/trainer/certificate-reports/',
      '/trainer/generate-certificates/'
    ];
    
    for (const pageUrl of documentationPages) {
      await page.goto(pageUrl);
      await page.waitForLoadState('networkidle');
      
      const pageName = pageUrl.split('/').filter(s => s).pop() || 'unknown';
      await takePageScreenshot(page, 'documentation', `trainer-${pageName}`);
    }
    
    // Login as master trainer for master pages
    await loginAsUser(page, 'masterTrainer');
    
    const masterPages = [
      '/master-trainer/dashboard/',
      '/master-trainer/google-sheets/'
    ];
    
    for (const pageUrl of masterPages) {
      await page.goto(pageUrl);
      await page.waitForLoadState('networkidle');
      
      const pageName = pageUrl.split('/').filter(s => s).pop() || 'unknown';
      await takePageScreenshot(page, 'documentation', `master-${pageName}`);
    }
    
    console.log('✓ Generated comprehensive visual documentation');
  });
});