/**
 * TXA Comment Widget - TPHIMX Cinematic Platform
 * Tự động hóa khung bình luận cao cấp.
 */

class TxaComment {
  constructor(containerId) {
    this.container = document.getElementById(containerId);
    if (!this.container) return;

    this.movieSlug = this.container.getAttribute('data-movie-slug');
    this.movieType = this.container.getAttribute('data-movie-type') || null;
    this.episodeName = this.container.getAttribute('data-episode-name') || null;
    this.serverName = this.container.getAttribute('data-server-name') || null;

    const userAttr = this.container.getAttribute('data-user');
    this.user = userAttr ? JSON.parse(userAttr) : null;
    this.comments = [];
    this.bannedUsers = [];

    this.init();
  }

  async init() {
    this.renderSkeleton();
    await this.fetchComments();
    this.renderCommentsList();
    this.setupListeners();
  }

  renderSkeleton() {
    const isLogged = !!this.user;
    
    this.container.innerHTML = `
      <div class="space-y-6 text-left">
         <!-- Heading -->
         <div class="flex items-center gap-3">
            <i class="fas fa-comment-dots text-primary text-xl"></i>
            <h3 class="text-lg font-black text-white">Bình luận (<span id="txac-count">0</span>)</h3>
         </div>

         <!-- Input Area -->
         <div class="glass-sub rounded-3xl p-5 border border-white/5 space-y-4">
            ${isLogged ? `
               <div class="relative">
                  <span class="absolute right-3 top-3 text-[10px] text-gray-500 font-mono" id="txac-char-counter">0 / 1000</span>
                  <textarea 
                     id="txac-textarea" 
                     maxlength="1000" 
                     placeholder="Viết bình luận..." 
                     class="w-full bg-[#12141d] border border-white/5 rounded-2xl px-5 py-4 pt-10 text-sm text-white focus:outline-none focus:border-primary/50 transition-all resize-none min-h-[100px]"
                  ></textarea>
               </div>
               
               <div class="flex items-center justify-between pt-2">
                  <!-- Spoiler Toggle -->
                  <div class="flex items-center gap-3">
                     <label class="relative inline-flex items-center cursor-pointer select-none">
                        <input type="checkbox" id="txac-spoiler" class="sr-only peer" />
                        <div class="w-9 h-5 bg-white/10 peer-focus:outline-none rounded-full peer peer-checked:after:translate-x-full peer-checked:after:border-white after:content-[''] after:absolute after:top-[2px] after:left-[2px] after:bg-gray-300 after:border-gray-300 after:border after:rounded-full after:h-4 after:w-4 after:transition-all peer-checked:bg-primary"></div>
                     </label>
                     <span class="text-xs text-gray-400 font-bold select-none">Tiết lộ?</span>
                  </div>

                  <!-- Send button -->
                  <button id="txac-submit-btn" class="flex items-center gap-2 rounded-xl bg-primary/10 hover:bg-primary text-primary hover:text-dark border border-primary/20 hover:border-primary px-5 py-2.5 text-xs font-black uppercase tracking-widest transition-all active:scale-95 cursor-pointer">
                     Gửi <i class="fas fa-paper-plane text-[10px]"></i>
                  </button>
               </div>
            ` : `
               <div class="py-8 text-center text-xs text-gray-500">
                  Vui lòng <a href="/dang-nhap" class="text-primary font-bold hover:underline">đăng nhập</a> để tham gia bình luận.
               </div>
            `}
         </div>

         <!-- Comments list -->
         <div id="txac-list" class="space-y-4 pt-4 divide-y divide-white/5">
            <div class="text-center text-xs text-gray-500 py-6">Đang tải bình luận...</div>
         </div>
      </div>
    `;
  }

  async fetchComments() {
    try {
      const res = await fetch(`/api/movie/comments?slug=${this.movieSlug}`);
      if (res.ok) {
        const data = await res.json();
        this.comments = data.comments || [];
        this.bannedUsers = data.bannedUsers || [];
        this.userProfiles = data.userProfiles || {};
      }
    } catch (e) {
      console.error('[TxaComment] Error fetching comments:', e);
    }
  }

  renderCommentsList() {
    const listContainer = document.getElementById('txac-list');
    const countSpan = document.getElementById('txac-count');
    
    if (countSpan) {
      const totalCount = this.comments.length;
      countSpan.textContent = window.txaformat ? window.txaformat.twoDigits(totalCount) : (totalCount < 10 ? '0' + totalCount : totalCount);
    }

    if (!listContainer) return;

    if (this.comments.length === 0) {
      listContainer.innerHTML = `
        <div class="text-center text-xs text-gray-500 py-8">
           Chưa có bình luận nào. Hãy là người đầu tiên chia sẻ cảm nghĩ!
        </div>
      `;
      return;
    }

    listContainer.innerHTML = this.comments.map(c => {
      const charCode = c.username ? c.username.charCodeAt(0) : 65;
      const avatarColors = [
        'bg-primary text-dark', 'bg-emerald-500 text-white', 'bg-blue-500 text-white', 
        'bg-pink-500 text-white', 'bg-yellow-500 text-dark', 'bg-purple-500 text-white'
      ];
      const avatarStyle = avatarColors[charCode % avatarColors.length];

      // Spoiler Logic
      const isSpoiler = c.is_spoiler;
      const commentBody = isSpoiler 
        ? `<div class="relative bg-red-500/5 border border-red-500/10 rounded-xl p-3 text-xs text-gray-400 mt-1 cursor-pointer spoiler-blur" onclick="this.classList.remove('spoiler-blur')">
             <span class="block text-[9px] font-black uppercase text-red-400 tracking-wider mb-1"><i class="fas fa-exclamation-triangle"></i> Bình luận có chứa tình tiết phim (Click để xem)</span>
             <span>${c.content}</span>
           </div>`
        : `<p class="text-sm text-gray-300 leading-relaxed mt-1">${c.content}</p>`;

      // Episode Tag (If commented from watch page)
      const episodeTag = (c.episode_name && c.server_name)
        ? `<span class="ml-2 bg-primary/10 text-primary border border-primary/20 text-[9px] font-black uppercase tracking-wider px-2 py-0.5 rounded-lg">${c.episode_name} - ${c.server_name}</span>`
        : '';

      // Likes/Dislikes Arrays
      const likes = c.likes || [];
      const dislikes = c.dislikes || [];
      const hasLiked = this.user && likes.includes(this.user.username);
      const hasDisliked = this.user && dislikes.includes(this.user.username);

      // Actions Check (Delete comment)
      const canDelete = this.user && (c.username === this.user.username || this.user.role === 'admin');
      const deleteButton = canDelete
        ? `<button class="txac-delete-btn text-gray-500 hover:text-red-400 transition-all flex items-center justify-center h-6 w-6 rounded-lg bg-white/5 hover:bg-red-500/10 cursor-pointer select-none ml-2" data-id="${c.id}" data-txatooltip="Xóa bình luận">
             <i class="fas fa-trash-alt text-[10px]"></i>
           </button>`
        : '';

      // Ban Button (For Admin ONLY)
      const isBanned = this.bannedUsers.includes(c.username);
      const showBanBtn = this.user && this.user.role === 'admin' && c.username !== this.user.username;
      const banButton = showBanBtn
        ? (isBanned 
            ? `<button class="txac-ban-btn text-emerald-400 hover:text-emerald-300 transition-all flex items-center justify-center h-6 w-6 rounded-lg bg-white/5 hover:bg-emerald-500/10 cursor-pointer select-none ml-auto animate-pulse" data-username="${c.username}" data-action="unban" data-txatooltip="Bỏ cấm bình luận @${c.username}">
                 <i class="fas fa-user-check text-[10px]"></i>
               </button>`
            : `<button class="txac-ban-btn text-red-500 hover:text-red-400 transition-all flex items-center justify-center h-6 w-6 rounded-lg bg-white/5 hover:bg-red-500/10 cursor-pointer select-none ml-auto" data-username="${c.username}" data-action="ban" data-txatooltip="Cấm bình luận @${c.username} (1 click)">
                 <i class="fas fa-user-slash text-[10px]"></i>
               </button>`
          )
        : '';

      // Lấy thông tin profile phục vụ cho hover popup
      const profile = (this.userProfiles && this.userProfiles[c.username]) || {
        commentsCount: 0,
        likesCount: 0,
        ward: '',
        province: ''
      };

      let locationStr = 'Chưa cập nhật';
      if (profile.ward || profile.province) {
        const parts = [];
        if (profile.ward) parts.push(`xã ${profile.ward}`);
        if (profile.province) parts.push(`tỉnh ${profile.province}`);
        locationStr = parts.join(', ');
        locationStr = locationStr.charAt(0).toUpperCase() + locationStr.slice(1);
      }

      const formattedComments = window.txaformat ? window.txaformat.twoDigits(profile.commentsCount) : (profile.commentsCount < 10 ? '0' + profile.commentsCount : profile.commentsCount);
      const formattedLikes = window.txaformat ? window.txaformat.twoDigits(profile.likesCount) : (profile.likesCount < 10 ? '0' + profile.likesCount : profile.likesCount);

      // Check if user has custom avatar URL
      const hasAvatar = profile && profile.avatar_url;
      const avatarInner = hasAvatar
        ? `<img src="${profile.avatar_url}" class="h-full w-full object-cover" />`
        : (c.username ? c.username[0] : 'U');

      return `
        <div class="pt-5 flex gap-4 items-start group">
           <!-- Avatar -->
           <div class="h-9 w-9 rounded-full overflow-hidden flex-shrink-0 flex items-center justify-center font-black uppercase text-xs ${hasAvatar ? '' : avatarStyle}">
              ${avatarInner}
           </div>
           
           <!-- Content -->
           <div class="flex-1 min-w-0">
              <div class="flex items-center gap-2">
                 <!-- Username với hover popup info -->
                 <div class="relative inline-block group/usercard">
                    <span class="text-xs font-bold text-white hover:text-primary transition-all cursor-pointer">@${c.username}</span>
                    
                    <!-- Hover Card Popup -->
                    <div class="absolute bottom-full left-0 mb-3 w-64 p-4 rounded-2xl bg-[#090b11]/98 border border-white/10 shadow-2xl backdrop-blur-md opacity-0 pointer-events-none group-hover/usercard:opacity-100 group-hover/usercard:pointer-events-auto transition-all duration-200 z-50 transform translate-y-1 group-hover/usercard:translate-y-0 text-left">
                       <div class="absolute -inset-px rounded-2xl bg-gradient-to-r from-primary/10 to-blue-500/10 opacity-40 blur-sm pointer-events-none"></div>
                       <div class="relative space-y-3">
                          <div class="flex items-center gap-3">
                             <div class="h-8 w-8 rounded-full overflow-hidden flex items-center justify-center font-black uppercase text-xs ${hasAvatar ? '' : avatarStyle}">
                                ${avatarInner}
                             </div>
                             <div>
                                <div class="text-xs font-black text-white">@${c.username}</div>
                                <div class="text-[9px] text-gray-500 font-bold uppercase tracking-wider">Thành viên TPhimX</div>
                             </div>
                          </div>
                          <div class="border-t border-white/5 my-1"></div>
                          <div class="space-y-2 text-[11px] text-gray-400">
                             <div class="flex items-center gap-2">
                                <i class="fas fa-comment text-primary w-4 text-center"></i>
                                <span>Số bình luận: <strong class="text-white">${formattedComments}</strong></span>
                             </div>
                             <div class="flex items-center gap-2">
                                <i class="fas fa-heart text-red-500 w-4 text-center"></i>
                                <span>Đã thích: <strong class="text-white">${formattedLikes} phim</strong></span>
                             </div>
                             <div class="flex items-start gap-2">
                                <i class="fas fa-map-marker-alt text-emerald-400 w-4 text-center mt-0.5"></i>
                                <span class="leading-relaxed">Nơi ở: <strong class="text-white">${locationStr}</strong></span>
                             </div>
                          </div>
                       </div>
                    </div>
                 </div>
                 ${episodeTag}
                 <span class="text-[10px] text-gray-500 ml-1">${(window.txaformat && window.txaformat.relativeTime) ? window.txaformat.relativeTime(c.created_at) : this.formatRelativeTime(c.created_at)}</span>
                 ${banButton}
                 ${deleteButton}
              </div>
              ${commentBody}
              
              <!-- Likes & Dislikes Row -->
              <div class="flex items-center gap-4 mt-3 pt-1">
                 <!-- Like -->
                 <button class="txac-reaction-btn flex items-center gap-1.5 transition-all text-xs font-bold select-none cursor-pointer ${hasLiked ? 'text-primary' : 'text-gray-500 hover:text-primary'}" data-id="${c.id}" data-action="like" data-txatooltip="Thích bình luận">
                    <i class="${hasLiked ? 'fas fa-thumbs-up' : 'far fa-thumbs-up'} text-[11px]"></i>
                    <span class="font-mono text-[11px] font-bold">${likes.length}</span>
                 </button>
                 <!-- Dislike -->
                 <button class="txac-reaction-btn flex items-center gap-1.5 transition-all text-xs font-bold select-none cursor-pointer ${hasDisliked ? 'text-red-500' : 'text-gray-500 hover:text-red-500'}" data-id="${c.id}" data-action="dislike" data-txatooltip="Không thích bình luận">
                    <i class="${hasDisliked ? 'fas fa-thumbs-down' : 'far fa-thumbs-down'} text-[11px]"></i>
                    <span class="font-mono text-[11px] font-bold">${dislikes.length}</span>
                 </button>
              </div>
           </div>
        </div>
      `;
    }).join('');

    if (window.initTxaTooltips) {
      setTimeout(() => window.initTxaTooltips(), 50);
    }
  }

  setupListeners() {
    const textarea = document.getElementById('txac-textarea');
    const counter = document.getElementById('txac-char-counter');
    const submitBtn = document.getElementById('txac-submit-btn');
    const spoiler = document.getElementById('txac-spoiler');

    // Char count update
    if (textarea && counter) {
      textarea.addEventListener('input', () => {
        const len = textarea.value.length;
        counter.textContent = `${len} / 1000`;
      });
    }

    // Submit new comment
    if (submitBtn && textarea) {
      submitBtn.addEventListener('click', async (e) => {
        e.preventDefault();
        const content = textarea.value.trim();
        if (!content) {
          if (window.txatoast) window.txatoast.warning('Nội dung bình luận không được để trống!', 3000, 'bottom-right');
          return;
        }

        submitBtn.disabled = true;
        
        try {
          const res = await fetch('/api/movie/comments', {
            method: 'POST',
            headers: { 'Content-Type': 'application/json' },
            body: JSON.stringify({
              movieSlug: this.movieSlug,
              content: content,
              isSpoiler: spoiler ? spoiler.checked : false,
              episodeName: this.episodeName,
              serverName: this.serverName,
              movieType: this.movieType
            })
          });

          const data = await res.json();
          if (res.ok) {
            if (window.txatoast) window.txatoast.success(data.message, 3000, 'bottom-right');
            textarea.value = '';
            if (counter) counter.textContent = '0 / 1000';
            if (spoiler) spoiler.checked = false;
            
            // Reload comments
            await this.fetchComments();
            this.renderCommentsList();
          } else {
            if (window.txatoast) window.txatoast.error(data.error, 3000, 'bottom-right');
          }
        } catch (err) {
          if (window.txatoast) window.txatoast.error('Lỗi gửi bình luận!', 3000, 'bottom-right');
        } finally {
          submitBtn.disabled = false;
        }
      });
    }

    // Event delegation for Likes, Dislikes, Delete, Ban buttons
    const listContainer = document.getElementById('txac-list');
    if (listContainer) {
      listContainer.addEventListener('click', async (e) => {
        // Find reaction button (Like / Dislike)
        const reactBtn = e.target.closest('.txac-reaction-btn');
        if (reactBtn) {
          e.preventDefault();
          const commentId = reactBtn.getAttribute('data-id');
          const action = reactBtn.getAttribute('data-action');
          await this.handleReaction(commentId, action);
          return;
        }

        // Find delete button
        const deleteBtn = e.target.closest('.txac-delete-btn');
        if (deleteBtn) {
          e.preventDefault();
          const commentId = deleteBtn.getAttribute('data-id');
          this.handleDelete(commentId);
          return;
        }

        // Find ban button
        const banBtn = e.target.closest('.txac-ban-btn');
        if (banBtn) {
          e.preventDefault();
          const targetUsername = banBtn.getAttribute('data-username');
          const action = banBtn.getAttribute('data-action');
          this.handleBan(targetUsername, action);
          return;
        }
      });
    }
  }

  async handleReaction(commentId, action) {
    if (!this.user) {
      if (window.txatoast) window.txatoast.warning('Vui lòng đăng nhập để bình chọn bình luận!', 3000, 'bottom-right');
      return;
    }

    try {
      const res = await fetch('/api/movie/comments', {
        method: 'PUT',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({ commentId, action })
      });
      const data = await res.json();
      if (res.ok) {
        // Cập nhật mảng trực tiếp cho comment hiện tại và re-render để hiển thị thay đổi lập tức
        const comment = this.comments.find(c => c.id === commentId);
        if (comment) {
          comment.likes = data.likes || [];
          comment.dislikes = data.dislikes || [];
          this.renderCommentsList();
        }
      } else {
        if (window.txatoast) window.txatoast.error(data.error, 3000, 'bottom-right');
      }
    } catch (err) {
      console.error('[TxaComment] Lỗi tương tác:', err);
    }
  }

  handleDelete(commentId) {
    if (!window.txamodal) {
      if (confirm('Bạn có chắc chắn muốn xóa bình luận này không?')) {
        this.executeDelete(commentId);
      }
      return;
    }

    window.txamodal.show({
      title: 'Xóa bình luận',
      message: 'Bạn có chắc chắn muốn xóa vĩnh viễn bình luận này? Hành động này không thể hoàn tác.',
      type: 'danger',
      confirmText: 'Xóa ngay',
      onConfirm: async () => {
        await this.executeDelete(commentId);
        return true;
      }
    });
  }

  async executeDelete(commentId) {
    try {
      const res = await fetch('/api/movie/comments', {
        method: 'DELETE',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({ commentId })
      });
      const data = await res.json();
      if (res.ok) {
        if (window.txatoast) window.txatoast.success(data.message, 3000, 'bottom-right');
        this.comments = this.comments.filter(c => c.id !== commentId);
        this.renderCommentsList();
      } else {
        if (window.txatoast) window.txatoast.error(data.error, 3000, 'bottom-right');
      }
    } catch (err) {
      if (window.txatoast) window.txatoast.error('Lỗi khi xóa bình luận!', 3000, 'bottom-right');
    }
  }

  handleBan(targetUsername, action) {
    // Chặn 1-click siêu tốc không cần xác nhận
    this.executeBan(targetUsername, action);
  }

  async executeBan(targetUsername, action) {
    try {
      const res = await fetch('/api/movie/comments', {
        method: 'PUT',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({ action, targetUsername })
      });
      const data = await res.json();
      if (res.ok) {
        if (window.txatoast) window.txatoast.success(data.message, 3000, 'bottom-right');
        this.bannedUsers = data.bannedUsers || [];
        this.renderCommentsList();
      } else {
        if (window.txatoast) window.txatoast.error(data.error, 3000, 'bottom-right');
      }
    } catch (err) {
      if (window.txatoast) window.txatoast.error('Lỗi khi thực thi yêu cầu chặn!', 3000, 'bottom-right');
    }
  }

  formatRelativeTime(isoString) {
    if (!isoString) return '';
    const date = new Date(isoString);
    const now = new Date();
    const diffMs = now.getTime() - date.getTime();
    
    if (isNaN(date.getTime()) || diffMs < 0) return 'Vừa xong';
    
    const diffSec = Math.floor(diffMs / 1000);
    if (diffSec < 60) return 'Vừa xong';
    
    const diffMin = Math.floor(diffSec / 60);
    if (diffMin < 60) return `${diffMin} phút trước`;
    
    const diffHour = Math.floor(diffMin / 60);
    if (diffHour < 24) return `${diffHour} giờ trước`;
    
    // Vượt quá 1 ngày (24 giờ): Chuyển sang định dạng ngày cụ thể "ngày/tháng/năm" chuẩn Việt Nam
    const day = date.getDate();
    const month = date.getMonth() + 1;
    const year = date.getFullYear();
    return `${day}/${month}/${year}`;
  }
}

// Auto instantiate on load
function initTxaCommentWidget() {
  if (document.getElementById('txa-comment-container')) {
     window.txacomment = new TxaComment('txa-comment-container');
  }
}
document.addEventListener('DOMContentLoaded', initTxaCommentWidget);
document.addEventListener('astro:page-load', initTxaCommentWidget);