{% extends "base.html" %}
{% load static %}

{% block title %}Чат{% endblock %}

{% block extra_css %}{% endblock %}

{% block content %}
<div class="container chat-root">
  <div class="row gx-0"> 
    <div class="col-12 chat-col">

      <!-- Заголовок -->
      <div class="section-header">
        {% if chat.type == 'global' %}
          <i class="bi-globe fs-2 text-primary"></i>
          <h2 class="title mb-0">Глобальный чат</h2>
        {% elif chat.type == 'department' %}
          <i class="bi-diagram-3 fs-2 text-primary"></i>
          <h2 class="title mb-0">Чат отдела: {{ chat.department.name }}</h2>
        {% elif chat.type == 'announcement' %}
          <i class="bi-megaphone fs-2 text-warning"></i>
          <h2 class="title mb-0">{{ chat.name|default:"Объявление" }}</h2>
          {% if chat.is_blocked %}
            <span class="badge bg-danger ms-2">
              <i class="bi-lock-fill"></i> Заблокировано
            </span>
          {% endif %}
          {% if not is_announcement_creator %}
            <span class="badge bg-info ms-2">
              <i class="bi-eye"></i> Только просмотр
            </span>
          {% endif %}
        {% else %}
          <i class="bi-person fs-2 text-primary"></i>
          <h2 class="title mb-0">
            {% for u in chat.participants.all %}
              {% if u != user %}
                {% if not forloop.first %}, {% endif %}
                <a href="{% url 'employees:employee_detail' u.pk %}" class="text-decoration-none">
                  {{ u.get_full_name|default:u.username }}
                </a>
              {% endif %}
            {% endfor %}
          </h2>
        {% endif %}
        <div class="ms-auto d-flex gap-2">
          {% if chat.type == 'announcement' and user.is_staff %}
            {% if chat.is_blocked %}
              <button type="button" class="btn btn-success btn-sm" onclick="unblockAnnouncement({{ chat.id }})">
                <i class="bi-unlock"></i> Разблокировать
              </button>
            {% else %}
              <button type="button" class="btn btn-danger btn-sm" onclick="blockAnnouncement({{ chat.id }})">
                <i class="bi-lock"></i> Заблокировать
              </button>
            {% endif %}
          {% endif %}
          <a href="{% url 'communications:chat_list' %}" class="btn btn-ghost">
            <i class="bi-arrow-left"></i> К чатам
          </a>
        </div>
      </div>

      <!-- Корпус чата -->
      <article class="card chat-box">

        <!-- Предупреждение о блокировке -->
        {% if chat.is_blocked %}
          <div class="alert alert-danger m-3 mb-0" role="alert">
            <div class="d-flex align-items-center">
              <i class="bi-lock-fill fs-4 me-2"></i>
              <div>
                <strong>Это объявление заблокировано администратором</strong>
                <br>
                <small>
                  Заблокировано: {{ chat.blocked_at|date:"d.m.Y в H:i" }}
                  {% if chat.blocked_by %}
                    пользователем <strong>{{ chat.blocked_by.get_full_name|default:chat.blocked_by.username }}</strong>
                  {% endif %}
                </small>
              </div>
            </div>
          </div>
        {% endif %}

        <!-- Информация об объявлении -->
        {% if chat.type == 'announcement' and not is_announcement_creator %}
          <div class="alert alert-light border m-3 mb-0 py-2" role="alert">
            <small class="text-secondary">
              <i class="bi-info-circle me-1"></i>
              Объявление от <strong>{{ chat.created_by.get_full_name|default:chat.created_by.username }}</strong>
            </small>
          </div>
        {% endif %}

        <!-- Кнопка «вниз» -->
        <button id="scrollBtn" class="scroll-to-bottom" type="button" aria-label="Прокрутить вниз">
          <i class="bi-arrow-down"></i>
        </button>

        <!-- Лента сообщений -->
        <div id="chatScroll"
             class="chat-scroll"
             data-me-id="{{ user.id }}"
             data-me-avatar="{% if user.avatar %}{{ user.avatar.url }}{% endif %}"
             data-profile-url="{% url 'employees:profile' %}"
             data-detail-url-template="{% url 'employees:employee_detail' 0 %}"
             data-chat-id="{{ chat.id }}"
             data-fetch-url="{% url 'api:v1:chat_messages' chat.pk %}"
             data-page-size="{{ messages_page_size }}"
             data-oldest-id="{{ messages_oldest_id }}"
             data-oldest-ts="{{ messages_oldest_ts }}"
             data-has-more="{% if messages_has_more %}1{% else %}0{% endif %}"
             data-last-read-ts="{% if last_read_at %}{{ last_read_at|date:'U' }}000{% endif %}">
          <div class="history-loader d-none" data-history-loader>
            <div class="spinner-border spinner-border-sm text-secondary" role="status" aria-hidden="true"></div>
            <span class="small">Загружаем ранние сообщения…</span>
          </div>
          {% if messages %}
            {% for message in messages %}
              {% ifchanged message.created_at|date:"d.m.Y" %}
                <div class="day-divider"><span>{{ message.created_at|date:"d.m.Y" }}</span></div>
              {% endifchanged %}

              <!-- сообщение -->
              <div class="d-flex mb-3 msg {% if message.author_id == user.id %}justify-content-end{% else %}justify-content-start{% endif %}"
                   data-id="{{ message.id }}"
                   data-ts="{{ message.created_at|date:'U' }}000"
                   data-author-id="{{ message.author_id }}">
                {% if message.author_id != user.id %}
                  <a class="me-2 text-decoration-none" href="{% url 'employees:employee_detail' message.author.pk %}">
                    <span class="mini-ava border">
                      {% if message.author.avatar %}<img src="{{ message.author.avatar.url }}" alt="" loading="lazy">
                      {% else %}<i class="bi-person"></i>{% endif %}
                    </span>
                  </a>
                {% endif %}

                <div class="d-flex flex-column" style="max-width:80%;">
                  <div class="small text-secondary {% if message.author_id == user.id %}text-end{% endif %}">
                    {% if message.author_id == user.id %}
                      <a href="{% url 'employees:profile' %}" class="text-decoration-none">Вы</a>
                    {% else %}
                      <a href="{% url 'employees:employee_detail' message.author.pk %}" class="text-decoration-none fw-semibold">
                        {{ message.author.get_full_name|default:message.author.username }}
                      </a>
                    {% endif %}
                    · <time datetime="{{ message.created_at|date:'c' }}">{{ message.created_at|date:"H:i" }}</time>
                  </div>
                  <div class="mt-1 bubble {% if message.author_id == user.id %}bubble-me{% else %}bubble-other{% endif %}">
                    {% if message.content %}
                      {{ message.content|linebreaksbr }}
                    {% endif %}
                    
                    {% if message.has_attachments %}
                      <div class="message-attachments mt-2">
                        {% for attachment in message.attachments.all %}
                          <div class="attachment-item mb-2">
                            {% if attachment.file_type == 'image' %}
                              <a href="{{ attachment.file.url }}" target="_blank" class="d-inline-block">
                                <img src="{{ attachment.file.url }}"
                                     alt="{{ attachment.file_name }}"
                                     loading="lazy"
                                     class="chat-media chat-media--image">
                              </a>
                            {% elif attachment.file_type == 'audio' %}
                              <audio controls class="w-100">
                                <source src="{{ attachment.file.url }}" type="{{ attachment.mime_type }}">
                              </audio>
                              <div class="small text-secondary">{{ attachment.file_name }}</div>
                            {% elif attachment.file_type == 'video' %}
                              <video controls preload="metadata" playsinline class="chat-media chat-media--video">
                                <source src="{{ attachment.file.url }}" type="{{ attachment.mime_type }}">
                                Ваш браузер не поддерживает видео.
                              </video>
                              <div class="small text-secondary">{{ attachment.file_name }}</div>
                            {% else %}
                              <a href="{{ attachment.file.url }}" 
                                 class="d-flex align-items-center text-decoration-none p-2 border rounded"
                                 download="{{ attachment.file_name }}">
                                <i class="bi-file-earmark fs-3 text-primary me-2"></i>
                                <div>
                                  <div class="fw-semibold">{{ attachment.file_name }}</div>
                                  <div class="small text-secondary">{{ attachment.file_size|filesizeformat }}</div>
                                </div>
                              </a>
                            {% endif %}
                          </div>
                        {% endfor %}
                      </div>
                    {% endif %}
                  </div>
                </div>

                {% if message.author_id == user.id %}
                  <a class="ms-2 text-decoration-none" href="{% url 'employees:profile' %}">
                    <span class="mini-ava border">
                      {% if user.avatar %}<img src="{{ user.avatar.url }}" alt="" loading="lazy">
                      {% else %}<i class="bi-person"></i>{% endif %}
                    </span>
                  </a>
                {% endif %}
              </div>
            {% endfor %}
          {% else %}
            <div class="text-center text-secondary py-5">Пока нет сообщений.</div>
          {% endif %}
        </div>

        <!-- Композер -->
        <div class="chat-composer">
          {% if can_send_messages %}
          <div id="typing" class="small text-secondary ps-1 pt-1 d-none">Собеседник печатает…</div>
      <form id="chatForm"
                class="composer-wrap"
                method="post"
                action="{% url 'communications:chat_detail' chat.pk %}"
                enctype="multipart/form-data"
                data-chat-composer="1"
                data-chat-id="{{ chat.id }}"
        data-upload-url="{% url 'api:v1:upload_message' %}"
        data-me-id="{{ user.id }}"
        data-me-name="{{ user.get_full_name|default:user.username }}"
        data-me-avatar="{% if user.avatar %}{{ user.avatar.url }}{% endif %}"
                data-profile-url="{% url 'employees:profile' %}"
                data-detail-url-template="{% url 'employees:employee_detail' 0 %}">
            {% csrf_token %}
            <div class="message-field">
              <!-- Кнопка вложений с выпадающим меню -->
              <div class="dropdown message-attach">
                <button type="button" class="btn btn-ghost btn-attachment message-icon-btn" 
                        id="attachmentDropdown" 
                        data-bs-toggle="dropdown" 
                        aria-expanded="false"
                        title="Прикрепить файл">
                  <i class="bi-paperclip"></i>
                </button>
                <ul class="dropdown-menu dropdown-menu-start" aria-labelledby="attachmentDropdown">
                  <li>
                    <a class="dropdown-item" href="#" id="attachDocument">
                      <i class="bi-file-earmark text-primary me-2"></i>
                      Документ
                    </a>
                  </li>
                  <li>
                    <a class="dropdown-item" href="#" id="attachImage">
                      <i class="bi-image text-success me-2"></i>
                      Фото или видео
                    </a>
                  </li>
                  <li>
                    <a class="dropdown-item" href="#" id="attachCamera">
                      <i class="bi-camera text-info me-2"></i>
                      Камера
                    </a>
                  </li>
                  <li>
                    <a class="dropdown-item" href="#" id="attachAudio">
                      <i class="bi-mic text-danger me-2"></i>
                      Аудио
                    </a>
                  </li>
                </ul>
              </div>

              <!-- Кнопка выбора эмодзи -->
              <div class="dropdown message-emoji">
                <button type="button" class="btn btn-ghost btn-emoji message-icon-btn"
                        id="emojiDropdown"
                        data-bs-toggle="dropdown"
                        data-emoji-toggle="1"
                        aria-expanded="false"
                        title="Вставить смайлик">
                  <i class="bi-emoji-smile"></i>
                </button>
                <div class="dropdown-menu dropdown-menu-start message-emoji-menu" aria-labelledby="emojiDropdown">
                  <emoji-picker data-emoji-picker class="chat-emoji-picker"></emoji-picker>
                </div>
              </div>

              <!-- Поле ввода текста -->
              <textarea name="content" 
                        id="id_content" 
                        class="form-control composer-textarea message-input" 
                        rows="1" 
                        placeholder="Напишите сообщение…"></textarea>

              <!-- Кнопка отправки -->
              <button type="submit" class="btn btn-primary btn-send message-send" title="Отправить">
                <i class="bi-send-fill"></i>
              </button>
            </div>

            <!-- Скрытые input для файлов -->
            <input type="file" id="documentInput" class="d-none" accept=".pdf,.doc,.docx,.xls,.xlsx,.txt,.zip,.rar">
            <input type="file" id="imageInput" class="d-none" accept="image/*,video/*" multiple>
            <input type="file" id="cameraInput" class="d-none" accept="image/*" capture="environment">
            <input type="file" id="audioInput" class="d-none" accept="audio/*">
            
            <!-- Превью прикрепленных файлов -->
            <div id="attachmentPreview" class="attachment-preview d-none"></div>
          </form>
          {% else %}
          <div class="text-center text-secondary py-3">
            <i class="bi-lock fs-4"></i>
            <p class="mb-0 mt-2">
              {% if chat.type == 'announcement' %}
                Только автор объявления может публиковать сообщения
              {% else %}
                У вас нет прав для отправки сообщений в этот чат
              {% endif %}
            </p>
          </div>
          {% endif %}
        </div>
      </article>

    </div>
  </div>
</div>

{% endblock %}

{% block extra_js %}
  {{ block.super }}
  <script type="module" src="https://cdn.jsdelivr.net/npm/emoji-picker-element@^1/index.js"></script>
  <script type="module" src="{% static 'js/components/chatComposer.js' %}"></script>
  <script type="module" src="{% static 'js/components/chatHistoryLoader.js' %}"></script>
  
  <script>
    // Блокировка объявления
    async function blockAnnouncement(chatId) {
      if (!confirm('Вы уверены, что хотите заблокировать это объявление? Оно исчезнет из списка чатов всех пользователей.')) {
        return;
      }
      
      try {
        const response = await fetch(`/communications/api/announcement/${chatId}/block/`, {
          method: 'POST',
          headers: {
            'Content-Type': 'application/json',
            'X-CSRFToken': document.querySelector('[name=csrfmiddlewaretoken]').value
          }
        });
        
        const data = await response.json();
        
        if (response.ok) {
          location.reload();
        } else {
          alert(data.error || 'Ошибка блокировки');
        }
      } catch (error) {
        console.error('Error blocking announcement:', error);
        alert('Ошибка при блокировке объявления');
      }
    }
    
    // Разблокировка объявления
    async function unblockAnnouncement(chatId) {
      try {
        const response = await fetch(`/communications/api/announcement/${chatId}/unblock/`, {
          method: 'POST',
          headers: {
            'Content-Type': 'application/json',
            'X-CSRFToken': document.querySelector('[name=csrfmiddlewaretoken]').value
          }
        });
        
        const data = await response.json();
        
        if (response.ok) {
          location.reload();
        } else {
          alert(data.error || 'Ошибка разблокировки');
        }
      } catch (error) {
        console.error('Error unblocking announcement:', error);
        alert('Ошибка при разблокировке объявления');
      }
    }
  </script>
{% endblock %}