{% extends 'base.html' %}
{% block title %}{{ resource.title }}{% endblock %}

{% block breadcrumb %}
<ol class="breadcrumb mb-0">
  <li class="breadcrumb-item"><a href="{{ url_for('resources.list_resources') }}">我的资源</a></li>
  <li class="breadcrumb-item active text-truncate" style="max-width:200px">{{ resource.title }}</li>
</ol>
{% endblock %}

{% block content %}
<div class="row g-4">

  <!-- ── 左：信息面板 ── -->
  <div class="col-lg-4 col-xl-3">
    <div class="card shadow-sm mb-3">
      <div class="card-body">
        <h5 class="card-title">{{ resource.title }}</h5>
        {% if resource.description %}
        <p class="text-muted small">{{ resource.description }}</p>
        {% endif %}

        <table class="table table-sm table-borderless small mb-0">
          <tr><td class="text-muted">类型</td>
              <td><span class="badge bg-{{ resource.type_badge_color }}">
                {{ resource.resource_type }}</span></td></tr>
          <tr><td class="text-muted">来源</td>
              <td>{{ resource.source_type }}</td></tr>
          {% if resource.original_name %}
          <tr><td class="text-muted">文件名</td>
              <td class="text-truncate" style="max-width:140px"
                  title="{{ resource.original_name }}">
                {{ resource.original_name }}</td></tr>
          {% endif %}
          {% if resource.file_size %}
          <tr><td class="text-muted">大小</td>
              <td>{{ resource.file_size | filesize }}</td></tr>
          {% endif %}
          {% if resource.mime_type %}
          <tr><td class="text-muted">MIME</td>
              <td class="text-truncate" style="max-width:140px">
                {{ resource.mime_type }}</td></tr>
          {% endif %}
          <tr><td class="text-muted">上传时间</td>
              <td>{{ resource.created_at | datetime_fmt }}</td></tr>
        </table>

        {% if resource.tag_list %}
        <div class="mt-2">
          {% for tag in resource.tag_list %}
          <span class="badge bg-light text-dark border me-1">{{ tag }}</span>
          {% endfor %}
        </div>
        {% endif %}
      </div>
      <div class="card-footer d-flex gap-2 flex-wrap">
        {% if resource.file_path and resource.download_status in ('na','done') %}
        <a href="{{ url_for('resources.download', resource_id=resource.id) }}"
           class="btn btn-sm btn-outline-primary">
          <i class="bi bi-download me-1"></i>下载
        </a>
        {% endif %}
        <a href="{{ url_for('resources.edit', resource_id=resource.id) }}"
           class="btn btn-sm btn-outline-secondary">
          <i class="bi bi-pencil me-1"></i>编辑
        </a>
        <form action="{{ url_for('resources.delete', resource_id=resource.id) }}"
              method="POST" class="d-inline"
              onsubmit="return confirm('确认删除此资源？')">
          {{ csrf_token_input() }}
          <button class="btn btn-sm btn-outline-danger">
            <i class="bi bi-trash me-1"></i>删除
          </button>
        </form>
      </div>
    </div>

    <!-- 来源信息 -->
    {% if resource.source_url %}
    <div class="card shadow-sm">
      <div class="card-body small">
        <div class="text-muted mb-1">来源链接</div>
        <div class="text-break" style="word-break:break-all;font-size:0.75rem">
          {{ resource.source_url | truncate_mid(80) }}
        </div>
      </div>
    </div>
    {% endif %}
  </div>

  <!-- ── 右：预览区 ── -->
  <div class="col-lg-8 col-xl-9">
    <div class="card shadow-sm">
      <div class="card-header d-flex justify-content-between align-items-center">
        <span><i class="bi bi-{{ resource.type_icon }} me-2"></i>预览</span>
        {% if resource.download_status in ('pending','downloading') %}
        <span class="badge bg-info" id="statusBadge">
          <i class="bi bi-arrow-down-circle me-1"></i>
          下载中 <span id="progressPct">{{ resource.download_progress }}</span>%
        </span>
        {% elif resource.download_status == 'failed' %}
        <span class="badge bg-danger">
          <i class="bi bi-exclamation-triangle me-1"></i>下载失败
        </span>
        {% endif %}
      </div>
      <div class="card-body p-0 preview-container">

        {% if resource.download_status in ('pending','downloading') %}
        <!-- 下载进度 -->
        <div class="d-flex flex-column align-items-center justify-content-center p-5" id="downloadingView">
          <div class="spinner-border text-primary mb-3"></div>
          <p class="text-muted mb-2">正在下载，请稍候…</p>
          <div class="progress w-50" style="height:8px">
            <div class="progress-bar progress-bar-striped progress-bar-animated"
                 id="progressBar" style="width:{{ resource.download_progress }}%"></div>
          </div>
          <p class="text-muted small mt-2" id="downloadError"></p>
        </div>

        {% elif resource.download_status == 'failed' %}
        <div class="d-flex flex-column align-items-center justify-content-center p-5 text-danger">
          <i class="bi bi-exclamation-triangle fs-1 mb-2"></i>
          <p>下载失败</p>
          {% if resource.download_error %}
          <p class="text-muted small">{{ resource.download_error }}</p>
          {% endif %}
        </div>

        {% elif resource.file_path %}
          {%- set file_url = url_for('static', filename=resource.file_path) -%}

          {% if resource.resource_type == 'image' %}
          <div class="text-center p-3 bg-checkerboard">
            <img src="{{ file_url }}" class="img-fluid rounded" style="max-height:70vh"
                 alt="{{ resource.title }}">
          </div>

          {% elif resource.resource_type == 'audio' %}
          <div class="d-flex flex-column align-items-center justify-content-center p-5">
            <i class="bi bi-music-note-beamed text-warning mb-3" style="font-size:5rem"></i>
            <p class="fw-medium mb-3">{{ resource.original_name or resource.title }}</p>
            <audio controls class="w-100" style="max-width:600px">
              <source src="{{ file_url }}" type="{{ resource.mime_type or 'audio/mpeg' }}">
              您的浏览器不支持 HTML5 音频播放器
            </audio>
          </div>

          {% elif resource.resource_type == 'video' %}
          <div class="ratio ratio-16x9">
            <video controls class="rounded-bottom">
              <source src="{{ file_url }}" type="{{ resource.mime_type or 'video/mp4' }}">
              您的浏览器不支持 HTML5 视频播放器
            </video>
          </div>

          {% elif resource.resource_type == 'text' %}
          {%- set _name = (resource.original_name or resource.filename or '') -%}
          {%- set _ext = _name.rsplit('.', 1)[-1].lower() if '.' in _name else '' -%}
          {%- set _mime = (resource.mime_type or '')|lower -%}
          {%- set _is_word = _ext in ('doc', 'docx')
                or 'wordprocessingml' in _mime
                or _mime == 'application/msword' -%}
          {% if _is_word %}
          <div class="text-preview-toolbar p-2 border-bottom d-flex gap-2 align-items-center">
            <i class="bi bi-file-earmark-word text-primary"></i>
            <span class="small text-muted">Word 文档预览</span>
          </div>
          <div class="word-preview p-4 bg-white" id="textContent"
               style="max-height:75vh;overflow:auto;line-height:1.7">
            <div class="text-center py-4 text-muted">
              <div class="spinner-border spinner-border-sm me-2"></div>加载中…
            </div>
          </div>
          {% else %}
          <div class="text-preview-toolbar p-2 border-bottom d-flex gap-2">
            <button class="btn btn-sm btn-outline-secondary" onclick="changeFont(1)">A+</button>
            <button class="btn btn-sm btn-outline-secondary" onclick="changeFont(-1)">A-</button>
            <button class="btn btn-sm btn-outline-secondary" onclick="toggleWrap()">换行</button>
          </div>
          <div class="text-preview p-4" id="textContent">
            <div class="text-center py-4 text-muted">
              <div class="spinner-border spinner-border-sm me-2"></div>加载中…
            </div>
          </div>
          {% endif %}

          {% else %}
          <div class="d-flex flex-column align-items-center justify-content-center p-5 text-muted">
            <i class="bi bi-file-earmark fs-1 mb-2"></i>
            <p>该文件类型暂不支持在线预览</p>
            <a href="{{ url_for('resources.download', resource_id=resource.id) }}"
               class="btn btn-primary mt-2">
              <i class="bi bi-download me-1"></i>下载文件
            </a>
          </div>
          {% endif %}

        {% else %}
        <div class="d-flex flex-column align-items-center justify-content-center p-5 text-muted">
          <i class="bi bi-hourglass fs-1 mb-2"></i>
          <p>文件尚未就绪</p>
        </div>
        {% endif %}

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

</div>
{% endblock %}

{% block scripts %}
<script>
// ── 文本内容加载 ────────────────────────────────────────────────────────────
{% if resource.resource_type == 'text' and resource.file_path and resource.download_status in ('na','done') %}
{%- set _name = (resource.original_name or resource.filename or '') -%}
{%- set _ext = _name.rsplit('.', 1)[-1].lower() if '.' in _name else '' -%}
{%- set _mime = (resource.mime_type or '')|lower -%}
{%- set _is_word = _ext in ('doc', 'docx')
      or 'wordprocessingml' in _mime
      or _mime == 'application/msword' -%}
{% if _is_word %}
// Word 文档：服务端已转换为 HTML，直接渲染
fetch("{{ url_for('resources.preview', resource_id=resource.id) }}")
  .then(r => r.text())
  .then(html => {
    const container = document.getElementById('textContent');
    container.innerHTML = html;
    // 让文档内的图片自适应宽度
    container.querySelectorAll('img').forEach(img => {
      img.style.maxWidth = '100%';
      img.style.height = 'auto';
    });
    // 表格基础样式
    container.querySelectorAll('table').forEach(t => {
      t.classList.add('table', 'table-bordered');
    });
  })
  .catch(() => {
    document.getElementById('textContent').innerHTML =
      '<div class="text-danger p-3">文档加载失败</div>';
  });
{% else %}
fetch("{{ url_for('resources.preview', resource_id=resource.id) }}")
  .then(r => r.text())
  .then(text => {
    const pre = document.createElement('pre');
    pre.id = 'textPre';
    pre.style.cssText = 'margin:0;font-family:monospace;font-size:14px;white-space:pre-wrap;word-break:break-all';
    pre.textContent = text;
    document.getElementById('textContent').innerHTML = '';
    document.getElementById('textContent').appendChild(pre);
  })
  .catch(() => {
    document.getElementById('textContent').innerHTML =
      '<div class="text-danger p-3">文件加载失败</div>';
  });

let fontSize = 14;
function changeFont(delta) {
  fontSize = Math.max(10, Math.min(24, fontSize + delta));
  const pre = document.getElementById('textPre');
  if (pre) pre.style.fontSize = fontSize + 'px';
}
function toggleWrap() {
  const pre = document.getElementById('textPre');
  if (!pre) return;
  pre.style.whiteSpace = pre.style.whiteSpace === 'pre' ? 'pre-wrap' : 'pre';
}
{% endif %}
{% endif %}

// ── 下载进度轮询 ────────────────────────────────────────────────────────────
{% if resource.download_status in ('pending','downloading') %}
(function poll() {
  fetch("{{ url_for('resources.progress', resource_id=resource.id) }}")
    .then(r => r.json())
    .then(data => {
      const bar = document.getElementById('progressBar');
      const pct = document.getElementById('progressPct');
      if (bar) bar.style.width = data.progress + '%';
      if (pct) pct.textContent = data.progress;

      if (data.status === 'done') {
        location.reload();
      } else if (data.status === 'failed') {
        const errEl = document.getElementById('downloadError');
        if (errEl) errEl.textContent = data.error || '下载失败';
        const badge = document.getElementById('statusBadge');
        if (badge) { badge.className = 'badge bg-danger'; badge.textContent = '下载失败'; }
      } else {
        setTimeout(poll, 2000);
      }
    })
    .catch(() => setTimeout(poll, 3000));
})();
{% endif %}
</script>
{% endblock %}