import {
  fetchTicket, fetchComments, fetchHistory,
  createComment,
  formatDateTime, formatMinutes, getHistoryIcon
} from './ticket-shared.js';

document.addEventListener('DOMContentLoaded', () => {
  document.body.classList.add('user-view');

  const ticketId = new URLSearchParams(window.location.search).get('id');
  if (!ticketId) return window.location.href = '/';

  // DOM elements
  const ticketTitle = document.getElementById('ticket-title-text');
  const ticketIdElem = document.getElementById('ticket-id-val');
  const ticketStatus = document.getElementById('ticket-status-badge');
  const ticketPriority = document.getElementById('priority-text');
  const ticketDescription = document.getElementById('ticket-description-text');
  const ticketRequester = document.getElementById('ticket-requester');
  const ticketCreated = document.getElementById('ticket-created');
  const ticketUpdated = document.getElementById('ticket-updated');
  const ticketCategory = document.getElementById('ticket-category');
  const commentsContainer = document.getElementById('comments-container');
  const historyContainer = document.getElementById('history-container');
  const commentForm = document.getElementById('comment-form');
  const tabBtns = document.querySelectorAll('.tab-btn');
  const totalTimeDisplay = document.getElementById('total-time');

  let webhookConfig = null;

  // Fetch Webhook Configuration
  async function loadWebhookConfig() {
    try {
      const response = await fetch('/api/webhooks');
      if (response.ok) {
        webhookConfig = await response.json();
        console.log('Webhook configuration loaded:', webhookConfig.configured);
      } else {
        console.warn('Failed to load webhook configuration');
        webhookConfig = { admin: null, user: null, configured: { admin: false, user: false } };
      }
    } catch (error) {
      console.error('Error loading webhook configuration:', error);
      webhookConfig = { admin: null, user: null, configured: { admin: false, user: false } };
    }
  }

  // Send Webhook Notification
  async function sendAdminWebhook(message) {
    if (!webhookConfig?.admin) {
      console.log('Admin webhook not configured, skipping notification');
      return;
    }

    try {
      const res = await fetch(webhookConfig.admin, {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({ content: message })
      });

      if (!res.ok) {
        console.error('Admin webhook failed:', res.statusText);
      }
    } catch (err) {
      console.error('Error sending admin webhook:', err);
    }
  }

  // Links automatically convert to clickable
  function linkify(text) {
    const urlPattern = /(\bhttps?:\/\/[^\s<]+)/g;
    return text.replace(urlPattern, '<a href="$1" target="_blank" rel="noopener noreferrer">$1</a>');
  }

  let originalStatus = '';
  let originalPriority = '';

  async function loadTicketDetails() {
    const ticket = await fetchTicket(ticketId);
    if (!ticket) return alert('Ticket not found');

    ticketTitle.textContent = ticket.title;
    ticketIdElem.textContent = ticket.id;
    ticketStatus.textContent = ticket.status;
    ticketDescription.innerHTML = linkify(ticket.description || '');
    ticketRequester.textContent = ticket.requester;
    ticketCreated.textContent = formatDateTime(ticket.created_at);
    ticketUpdated.textContent = formatDateTime(ticket.updated_at);
    ticketPriority.textContent = ticket.priority;

    if (ticketCategory) {
      ticketCategory.textContent = ticket.category || '—';
    }

    ticketStatus.className = `ticket-status status-${ticket.status.replace(/ /g, '-')}`;

    const totalTimeDisplay = document.getElementById('total-time');
    if (totalTimeDisplay) {
      totalTimeDisplay.textContent = formatMinutes(ticket.total_time || 0);
    }

    originalStatus = ticket.status;
    originalPriority = ticket.priority;
  }

  async function loadComments() {
    const comments = await fetchComments(ticketId);
    commentsContainer.innerHTML = comments.map(comment => {
      const role = comment.role ? comment.role.toLowerCase() : 'user';
      let avatarUrl = '/assets/user.jpg';
      if (role === 'admin') avatarUrl = '/assets/admin.jpg';
      else if (role === 'moderator') avatarUrl = '/assets/moderator.jpg';

      // Comment content is linkified
      const linkedContent = linkify(comment.content || '');

      return `
        <div class="comment">
          <img class="comment-avatar" src="${avatarUrl}" alt="${role.charAt(0).toUpperCase() + role.slice(1)} Avatar">
          <div class="comment-content">
            <div class="comment-header">
              <span class="comment-author">${comment.author}</span>
              <span class="comment-date">${formatDateTime(comment.date)}</span>
            </div>
            <div class="comment-text">${linkedContent}</div>
          </div>
        </div>
      `;
    }).join('');
  }

  async function loadHistory() {
    const history = await fetchHistory(ticketId);
    historyContainer.innerHTML = history.map(h => `
      <div class="history-item">
        <div class="history-icon"><i class="fas fa-${getHistoryIcon(h.action)}"></i></div>
        <div class="history-content">
          <div class="history-action">${h.action}</div>
          <div class="history-details">${h.message || h.details || ''}</div>
          <div class="history-meta">
            <span class="history-actor">By ${h.author || h.actor || 'unknown'}</span>
            <span class="history-date">${formatDateTime(h.date)}</span>
          </div>
        </div>
      </div>
    `).join('');
  }

  if (commentForm) {
    commentForm.addEventListener('submit', async (e) => {
      e.preventDefault();
      const author = document.getElementById('comment-author')?.value || 'Unknown';
      const content = document.getElementById('comment-content')?.value;
      if (!content?.trim()) return alert('Please enter a comment');

      const timestamp = new Date().toISOString();

      try {
        await createComment(ticketId, { author, content, timestamp });
        document.getElementById('comment-content').value = '';
        await loadComments();
        await loadHistory();
        await sendAdminWebhook(`New comment added by ${author}: "${content}" on ticket #${ticketId}`);
      } catch (err) {
        console.error('Failed to create comment:', err);
        alert('Failed to submit comment. Please try again.');
      }
    });
  }

  async function checkForChanges() {
    const ticket = await fetchTicket(ticketId);
    if (!ticket) return;

    // Update UI if status or priority changes server-side
    if (ticket.status !== originalStatus) {
      originalStatus = ticket.status;
      ticketStatus.textContent = ticket.status;
      ticketStatus.className = `ticket-status status-${ticket.status.replace(/ /g, '-')}`;
    }

    if (ticket.priority !== originalPriority) {
      originalPriority = ticket.priority;
      ticketPriority.textContent = ticket.priority;
    }

    // Check and update category if necessary
    if (ticketCategory && ticket.category !== ticketCategory.textContent) {
      ticketCategory.textContent = ticket.category || '—';
    }
  }

  tabBtns.forEach(btn => btn.addEventListener('click', () => {
    tabBtns.forEach(b => b.classList.remove('active'));
    btn.classList.add('active');
    document.querySelectorAll('.tab-content').forEach(el => el.classList.remove('active'));
    document.getElementById(`${btn.dataset.tab}-tab`).classList.add('active');
  }));

  // Initial load
  loadWebhookConfig().then(() => {
    loadTicketDetails();
    loadComments();
    loadHistory();
  });

  // Periodic updates
  setInterval(checkForChanges, 30000);
});