{% extends "base.html" %}
{% block title %}DRM | 后台管理{% endblock %}
{% block head %}
  <link rel="stylesheet" href="{{ url_for('static', filename='v020.css') }}">
{% endblock %}
{% block body %}
  <main class="admin-layout admin-layout-v2" data-admin-page="{{ admin_page }}">
    <section class="admin-hero card-surface">
      <div>
        <p class="section-kicker">后台管理</p>
        {% if admin_page == "schedule" %}
          <h1>时间表设置</h1>
          <p class="admin-copy">通过拖拽上课块和课间块，重新安排整套节次时间。保存后首页与周课表会自动同步。</p>
        {% elif admin_page == "lists" %}
          <h1>清单管理</h1>
          <p class="admin-copy">统一维护首页的 todolist 分类，删除或新建会即时反映到主页与拖拽池。</p>
        {% else %}
          <h1>课程管理</h1>
          <p class="admin-copy">左侧新增或编辑课程，右侧用竖直列表快速检查全周课程配置。</p>
        {% endif %}
      </div>

      <div class="action-group">
        <a class="ghost-link" href="{{ url_for('index') }}">返回主页</a>
      </div>

      <nav class="admin-page-nav" aria-label="后台分页">
        <a class="admin-page-tab {% if admin_page == 'schedule' %}is-active{% endif %}" href="{{ url_for('admin_schedule') }}">时间表设置</a>
        <a class="admin-page-tab {% if admin_page == 'lists' %}is-active{% endif %}" href="{{ url_for('admin_lists') }}">清单管理</a>
        <a class="admin-page-tab {% if admin_page == 'courses' %}is-active{% endif %}" href="{{ url_for('admin_courses') }}">课程管理</a>
      </nav>
    </section>

    {% if admin_page == "schedule" %}
      <section class="admin-section">
        <div class="admin-grid admin-grid-tight admin-schedule-grid">
          <article class="admin-card schedule-form-card">
            <div class="admin-card-head">
              <div>
                <p class="column-label">Basic Settings</p>
                <h2>基础参数</h2>
              </div>
            </div>

            <form id="scheduleSettingsForm" class="modal-form compact">
              <label>
                <span>学期开始日期</span>
                <input id="semesterStartInput" name="semester_start" type="date" value="{{ schedule_settings.semester_start }}">
              </label>
              <label>
                <span>课表显示开始</span>
                <input id="dayStartInput" name="day_start" type="time" value="{{ schedule_settings.day_start }}">
              </label>
              <label>
                <span>课表显示结束</span>
                <input id="dayEndInput" name="day_end" type="time" value="{{ schedule_settings.day_end }}">
              </label>
              <label>
                <span>默认任务时长（分钟）</span>
                <input id="defaultDurationInput" name="default_task_duration_minutes" type="number" min="30" max="240" step="15" value="{{ schedule_settings.default_task_duration_minutes }}">
              </label>
              <div class="form-actions">
                <button class="secondary-button" id="resetTimelineButton" type="button">恢复默认节次</button>
                <button class="primary-button" type="submit">保存时间表设置</button>
              </div>
            </form>
          </article>

          <article class="admin-card schedule-editor-card">
            <div class="admin-card-head">
              <div>
                <p class="column-label">Timeline Editor</p>
                <h2>拖拽块到时间轴上重新排布节次</h2>
              </div>
              <span class="task-count" id="scheduleSegmentCount">0 段</span>
            </div>

            <div class="schedule-palette" id="schedulePalette">
              <div class="schedule-palette-card class" draggable="true" data-palette-kind="class">
                <strong>上课块</strong>
                <span>拖到时间轴末尾追加一节课</span>
              </div>
              <div class="schedule-palette-card break" draggable="true" data-palette-kind="break">
                <strong>课间块</strong>
                <span>拖到时间轴末尾追加一段休息</span>
              </div>
            </div>

            <p class="admin-card-copy">规则：时间段不能重叠，上课后必须是课间，课间后必须是上课。支持拖入新块、删除节次、调整时长。</p>

            <div class="schedule-editor-shell">
              <div class="schedule-editor-axis" id="scheduleEditorAxis"></div>
              <div class="schedule-editor-track" id="scheduleEditorTrack">
                <div class="schedule-editor-dropzone" id="scheduleEditorDropzone">将上课块或课间块拖到这里，追加到时间表末尾</div>
              </div>
            </div>
          </article>
        </div>
      </section>
    {% elif admin_page == "lists" %}
      <section class="admin-section">
        <div class="admin-grid admin-grid-tight admin-lists-grid">
          <article class="admin-card create-card list-create-card">
            <div class="create-icon">+</div>
            <h2>新建一个清单</h2>
            <p class="admin-card-copy">清单会直接同步到首页与第二页的拖拽池。</p>
            <form id="createCategoryForm" class="modal-form compact">
              <label>
                <span>分类名称</span>
                <input id="newCategoryName" name="name" type="text" maxlength="20" placeholder="例如：项目推进">
              </label>
              <button class="primary-button" type="submit">立即创建</button>
            </form>
          </article>

          <section class="admin-stack list-management-stack" id="adminGrid">
            {% for category in categories %}
              <article class="admin-card admin-row-card list-row-card" data-category-id="{{ category.id }}">
                <div class="admin-row-main">
                  <div>
                    <p class="column-label">Category</p>
                    <h2>{{ category.name }}</h2>
                    <p class="admin-card-copy">删除分类会同时移除其下全部任务，请谨慎操作。</p>
                  </div>
                  <div class="admin-row-side">
                    <span class="task-count">{{ category.tasks|length }} 项任务</span>
                    <button class="danger-button" type="button" data-delete-category="{{ category.id }}">删除此清单</button>
                  </div>
                </div>
              </article>
            {% endfor %}
          </section>
        </div>
      </section>
    {% else %}
      <section class="admin-section">
        <div class="admin-grid admin-grid-tight course-management-grid">
          <article class="admin-card course-editor-card">
            <div class="admin-card-head">
              <div>
                <p class="column-label">Course Editor</p>
                <h2 id="courseEditorHeading">新增课程</h2>
              </div>
            </div>
            <p class="admin-card-copy">课程时间按“第几节到第几节”输入，系统会根据当前时间表自动换算为具体时间。</p>

            <form class="modal-form compact" id="courseForm">
              <input id="courseIdInput" name="course_id" type="hidden">
              <label>
                <span>课程名称</span>
                <input id="courseTitleInput" name="title" type="text" maxlength="40" placeholder="例如：高等数学">
              </label>
              <label>
                <span>上课地点</span>
                <input id="courseLocationInput" name="location" type="text" maxlength="40" placeholder="例如：教学楼 A302">
              </label>
              <label>
                <span>星期几</span>
                <select id="courseWeekdayInput" name="day_of_week">
                  <option value="1">星期一</option>
                  <option value="2">星期二</option>
                  <option value="3">星期三</option>
                  <option value="4">星期四</option>
                  <option value="5">星期五</option>
                  <option value="6">星期六</option>
                  <option value="7">星期日</option>
                </select>
              </label>
              <div class="split-fields">
                <label>
                  <span>开始节次</span>
                  <select id="courseStartPeriodInput" name="start_period"></select>
                </label>
                <label>
                  <span>结束节次</span>
                  <select id="courseEndPeriodInput" name="end_period"></select>
                </label>
              </div>
              <div class="split-fields">
                <label>
                  <span>开始周数</span>
                  <input id="courseStartWeekInput" name="start_week" type="number" min="1" max="30" value="1">
                </label>
                <label>
                  <span>结束周数</span>
                  <input id="courseEndWeekInput" name="end_week" type="number" min="1" max="30" value="16">
                </label>
              </div>
              <label>
                <span>单双周</span>
                <select id="courseWeekPatternInput" name="week_pattern">
                  <option value="all">每周</option>
                  <option value="odd">单周</option>
                  <option value="even">双周</option>
                </select>
              </label>
              <div class="form-actions">
                <button class="secondary-button" id="resetCourseEditorButton" type="button">清空表单</button>
                <button class="primary-button" type="submit">保存课程</button>
              </div>
            </form>
          </article>

          <section class="admin-stack course-list" id="courseGrid">
            {% if courses %}
              {% for course in courses %}
                <article class="admin-card admin-row-card course-card" data-course-id="{{ course.id }}">
                  <div class="admin-card-head course-row-head">
                    <div>
                      <p class="column-label">Course</p>
                      <h2>{{ course.title }}</h2>
                    </div>
                    <div class="course-row-actions">
                      <span class="task-count">周{{ ["一","二","三","四","五","六","日"][course.day_of_week - 1] }}</span>
                      <button class="secondary-button" type="button" data-edit-course="{{ course.id }}">编辑课程</button>
                      <button class="danger-button" type="button" data-delete-course="{{ course.id }}">删除课程</button>
                    </div>
                  </div>
                  <p class="admin-card-copy">{{ course.start_time }} - {{ course.end_time }} · 第 {{ course.start_week }}-{{ course.end_week }} 周 · {% if course.week_pattern == "odd" %}单周{% elif course.week_pattern == "even" %}双周{% else %}每周{% endif %}</p>
                  <p class="admin-card-copy">{{ course.location if course.location else "未填写地点" }}</p>
                </article>
              {% endfor %}
            {% else %}
              <article class="admin-card empty-admin-card">
                <h2>还没有固定课程</h2>
                <p class="admin-card-copy">在左侧填写课程信息并保存后，周课表会自动按周显示。</p>
              </article>
            {% endif %}
          </section>
        </div>
      </section>
    {% endif %}

    <div class="toast-stack" id="toastStack"></div>
  </main>
{% endblock %}
{% block scripts %}
  <script>
    window.__ADMIN_BOOTSTRAP__ = {
      adminPage: {{ admin_page|tojson }},
      courses: {{ courses|tojson }},
      categories: {{ categories|tojson }},
      scheduleSettings: {{ schedule_settings|tojson }},
      defaultTimeSlots: {{ default_time_slots|tojson }},
    };
  </script>
  <script src="{{ url_for('static', filename='admin-v020.js') }}"></script>
{% endblock %}