/**
 * Brightwheel Exporter - Content Script
 * Injected on https://schools.mybrightwheel.com/*
 */

(function () {
  console.log('[Brightwheel Exporter] Content script initialized.');

  // Extract student ID from URL if present
  function detectCurrentStudentId() {
    const match = window.location.pathname.match(/\/students\/([a-zA-Z0-9-]+)/);
    if (match && match[1]) {
      chrome.storage.local.set({ lastActiveStudentId: match[1] });
      return match[1];
    }
    return null;
  }

  detectCurrentStudentId();

  // Watch for SPA URL changes
  let lastUrl = location.href;
  new MutationObserver(() => {
    const url = location.href;
    if (url !== lastUrl) {
      lastUrl = url;
      detectCurrentStudentId();
    }
  }).observe(document, { subtree: true, childList: true });

  // Listen for messages from extension popup or dashboard
  chrome.runtime.onMessage.addListener((message, sender, sendResponse) => {
    if (message.action === 'GET_PAGE_CONTEXT') {
      const studentId = detectCurrentStudentId();
      sendResponse({
        url: window.location.href,
        studentId: studentId,
        cookiesPresent: document.cookie.includes('_brightwheel_v2')
      });
      return true;
    }

    if (message.action === 'SCRAPE_DOM_FEED') {
      try {
        const domActivities = scrapeDomFeedCards();
        sendResponse({ success: true, activities: domActivities, htmlSample: document.body.innerHTML.substring(0, 5000) });
      } catch (err) {
        sendResponse({ success: false, error: err.message });
      }
      return true;
    }

    if (message.action === 'FETCH_WITH_CREDENTIALS') {
      fetch(message.url, {
        method: message.method || 'GET',
        headers: {
          'Accept': 'application/json',
          ...(message.headers || {})
        },
        credentials: 'include'
      })
        .then(async (res) => {
          if (!res.ok) {
            const errorText = await res.text().catch(() => '');
            return sendResponse({ success: false, status: res.status, statusText: res.statusText, body: errorText });
          }
          const json = await res.json();
          sendResponse({ success: true, status: res.status, data: json });
        })
        .catch((err) => {
          sendResponse({ success: false, error: err.message });
        });
      return true; // async
    }
  });

  // DOM Scraper for Brightwheel Web Feed
  function scrapeDomFeedCards() {
    const results = [];
    // Broad selector covering common Brightwheel feed cards
    const cardSelectors = [
      '[data-testid*="activity"]',
      '[data-testid*="feed"]',
      '.activity-item',
      '.feed-item',
      '.timeline-item',
      'article',
      '[class*="ActivityCard"]',
      '[class*="feed-card"]',
      '[class*="FeedItem"]',
      '[class*="TimelineItem"]'
    ];

    let cards = document.querySelectorAll(cardSelectors.join(','));
    if (!cards || cards.length === 0) {
      // Fallback: look for cards by common structure
      cards = document.querySelectorAll('div[class*="card"], div[class*="Card"]');
    }

    cards.forEach((card, index) => {
      const text = card.innerText || '';
      if (!text.trim()) return;

      const cardId = card.getAttribute('data-id') || card.getAttribute('data-activity-id') || card.id || `dom_${index}`;
      const img = card.querySelector('img[src*="cdn"], img[src*="brightwheel"], img[src*="cloudfront"], img[src*="s3"]');
      const video = card.querySelector('video, source, a[href*=".mp4"], a[href*="video"]');

      const videoUrl = video?.src || video?.getAttribute('src') || video?.getAttribute('href') || null;
      const imageUrl = img?.src || null;

      results.push({
        dom_id: cardId,
        raw_text: text,
        image_url: imageUrl,
        video_url: videoUrl,
        class_name: card.className,
        html_snippet: card.outerHTML.substring(0, 800)
      });
    });

    return results;
  }

  // Inject a discreet floating button on Brightwheel page
  function injectExporterButton() {
    if (document.getElementById('bw-exporter-floating-btn')) return;

    const btn = document.createElement('button');
    btn.id = 'bw-exporter-floating-btn';
    btn.innerHTML = `
      <svg width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2.5" stroke-linecap="round" stroke-linejoin="round" style="margin-right: 6px;">
        <path d="M21 15v4a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2v-4"></path>
        <polyline points="7 10 12 15 17 10"></polyline>
        <line x1="12" y1="15" x2="12" y2="3"></line>
      </svg>
      Export Brightwheel Data
    `;

    Object.assign(btn.style, {
      position: 'fixed',
      bottom: '24px',
      right: '24px',
      zIndex: '999999',
      display: 'inline-flex',
      alignItems: 'center',
      padding: '10px 18px',
      background: 'linear-gradient(135deg, #FF6B35 0%, #FF8E53 100%)',
      color: '#FFFFFF',
      fontFamily: '-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif',
      fontSize: '14px',
      fontWeight: '600',
      border: 'none',
      borderRadius: '30px',
      boxShadow: '0 4px 16px rgba(255, 107, 53, 0.4), 0 2px 6px rgba(0, 0, 0, 0.1)',
      cursor: 'pointer',
      transition: 'all 0.25s ease',
    });

    btn.addEventListener('mouseenter', () => {
      btn.style.transform = 'translateY(-2px) scale(1.03)';
      btn.style.boxShadow = '0 6px 20px rgba(255, 107, 53, 0.5), 0 3px 8px rgba(0, 0, 0, 0.15)';
    });

    btn.addEventListener('mouseleave', () => {
      btn.style.transform = 'translateY(0) scale(1)';
      btn.style.boxShadow = '0 4px 16px rgba(255, 107, 53, 0.4), 0 2px 6px rgba(0, 0, 0, 0.1)';
    });

    btn.addEventListener('click', () => {
      chrome.runtime.sendMessage({ action: 'OPEN_DASHBOARD' });
    });

    document.body.appendChild(btn);
  }

  // Inject when DOM is ready
  if (document.readyState === 'loading') {
    document.addEventListener('DOMContentLoaded', injectExporterButton);
  } else {
    injectExporterButton();
  }
})();