<template>
  <div class="template_details">
    <div
      v-if="isData && CourseData.is_release === 'true' && CourseData.is_deleted === 'false'"
      v-loading="loading"
      class="details_container"
    >
      <header class="title">{{ CourseData.name }}</header>
      <main class="main">
        <div v-for="(item, i) in CourseData.cs_item_list" :key="i" class="course-list">
          <div class="courseOne">
            <div class="title">
              <div>
                <span>{{ i + 1 }}.</span>
                <span>{{ item.name }}</span>
              </div>
              <div class="courseOne-time">{{ item.begin_time }} ~ {{ item.end_time }}</div>
            </div>
          </div>
          <div class="course-content">
            <el-collapse @change="handleChange(item.id)">
              <el-collapse-item :name="item.id">
                <div slot="title" class="Coursetasks">
                  {{ $t('Key392') }}
                  <img
                    class="arrow"
                    :src="
                      openList.includes(item.id)
                        ? require('../../assets/course_details/open1.png')
                        : require('../../assets/course_details/open2.png')
                    "
                  />
                </div>
                <div class="courseContent">
                  <template v-for="li in courseContentList">
                    <div v-if="item[li.id].length > 0" :key="li.id" class="tasks">
                      <div class="title">
                        <span class="red-circle" /><span>{{ $t(li.name) }}</span>
                      </div>
                      <div class="content">
                        <el-collapse-item v-for="(it, it_i) in item[li.id]" :key="it_i" :name="it.id">
                          <div slot="title" :class="openList.includes(it.id) ? 'contenttitle2' : 'contenttitle'">
                            <span :title="it.name">{{ it.name }}</span>
                            <!-- <span class="content-image">
                              <el-image :src="require('@/assets/course_details/people.png')" />
                            </span> -->
                            <span>
                              <span class="gray">{{ it.begin_time }} ~ {{ it.end_time }}</span>
                              <span class="gray">···</span>
                            </span>
                          </div>
                          <div class="detail">
                            <div>
                              <span>{{ $t('Key393') }}</span>
                              <p>
                                {{ it.content }}
                              </p>
                            </div>
                            <div v-if="it.courseware_list.length > 0">
                              <span>{{ $t('Key309') }}</span>
                              <div>
                                <div
                                  v-for="(courseware, courseware_i) in it.courseware_list"
                                  :key="courseware_i"
                                  class="btn"
                                >
                                  <img src="../../assets/course_details/file.png" alt="" />
                                  <span> {{ courseware.courseware_name }} </span>
                                </div>
                              </div>
                            </div>
                            <div v-if="it.accessory_list.length > 0">
                              <span>{{ $t('Key394') }}</span>
                              <div>
                                <div
                                  v-for="(accessory, accessory_i) in it.accessory_list"
                                  :key="accessory_i"
                                  class="btn"
                                >
                                  <img src="../../assets/course_details/fileType1.png" alt="" />
                                  <span> {{ accessory.file_name }} </span>
                                </div>
                              </div>
                            </div>
                          </div>
                        </el-collapse-item>
                      </div>
                    </div>
                  </template>
                </div>
              </el-collapse-item>
            </el-collapse>
          </div>
        </div>
      </main>
    </div>

    <div v-else-if="!loading" class="non-existent">
      {{
        CourseData.is_deleted === 'true'
          ? '无法查看，课程已删除'
          : CourseData.is_release === 'false'
          ? '无法查看，课程已下架'
          : '课程不存在'
      }}
    </div>
  </div>
</template>

<script>
import { GetCourseInfoBox } from '@/api/course';

export default {
  data() {
    const query = this.$route.query;

    return {
      id: query.id,
      CourseData: null,
      isData: false,
      loading: true,
      openList: [],
      courseContentList: [
        { id: 'pre_task_list', name: 'Key353' },
        { id: 'mid_task_list', name: 'Key354' },
        { id: 'after_task_list', name: 'Key355' }
      ]
    };
  },
  created() {
    GetCourseInfoBox({ id: this.id })
      .then(res => {
        this.CourseData = res;
        this.isData = 'id' in res;
        this.loading = false;
      })
      .catch(() => {
        this.loading = false;
      });
  },
  methods: {
    // 课程任务的打开和关闭
    handleChange(val) {
      this.openList.includes(val) ? this.openList.splice(this.openList.indexOf(val), 1) : this.openList.push(val);
    }
  }
};
</script>

<style lang="scss" scoped>
.template_details {
  min-height: 100%;
  padding: 52px 0 20px;
  background: #e5e5e5;

  .details_container {
    display: flex;
    flex-direction: column;
    row-gap: 24px;
    width: 1200px;
    min-height: calc(100vh - 168px);
    margin: 0 auto;
  }

  header.title {
    font-size: 20px;
    font-weight: 700;

    &::before {
      display: inline-block;
      width: 4px;
      height: 13px;
      margin-right: 16px;
      content: '';
      background-color: $basic-color;
    }
  }

  .main {
    flex: 1;
    width: 100%;
    padding: 40px;
    background-color: #fff;
    border-radius: 8px;

    .course-list {
      font-size: 18px;
      background: #fff;

      & + .course-list {
        margin-top: 30px;
      }

      > :not(.courseOne) {
        padding-left: 40px;
        margin-top: 16px;
      }

      .courseOne {
        .title {
          display: flex;
          justify-content: space-between;

          > div:nth-child(1) {
            font-size: 20px;
            font-weight: bold;

            span {
              margin-right: 24px;
            }
          }
        }

        &-time {
          color: #737373;
        }
      }

      .course-content {
        width: 670px;
      }

      .Coursetasks {
        display: flex;
        align-items: center;
        font-size: 16px;
        cursor: pointer;

        .arrow {
          width: 24px;
          margin-left: 8px;
        }
      }

      .courseContent {
        .tasks {
          padding-left: 10px;

          .title {
            font-size: 16px;
            color: #2c2c2c;

            .red-circle {
              position: relative;
              right: 3px;
              display: inline-block;
              width: 8px;
              height: 8px;
              margin-right: 16px;
              background: #fe6d68;
              border-radius: 50%;
            }
          }

          .content {
            padding-bottom: 10px;
            padding-left: 20px;
            margin-top: 16px;
            border-left: 1px solid #fe6d68;

            %contenttitle,
            .contenttitle {
              display: flex;
              align-items: center;
              justify-content: space-between;
              width: 670px;
              padding: 0 10px;
              font-size: 16px;
              cursor: pointer;
              background: #fff;
              border: 1px solid #e6e6e6;
              border-radius: 8px;

              img {
                width: 16px;
                margin-left: 8px;
              }

              .content-image {
                .el-image {
                  width: 16px;
                  height: 16px;
                  vertical-align: middle;
                }
              }

              span {
                margin-left: 16px;
              }

              > span:first-child {
                width: 180px;
                overflow: hidden;
                text-overflow: ellipsis;
                white-space: nowrap;
              }

              .gray {
                opacity: 0.5;
              }
            }

            .contenttitle2 {
              @extend %contenttitle;

              background: #f9f9f9;
              border-bottom-right-radius: 0;
              border-bottom-left-radius: 0;
            }

            .detail {
              width: 100%;
              padding-bottom: 24px;
              background: #fff;
              border: 1px solid #e7e7e7;
              border-bottom-right-radius: 8px;
              border-bottom-left-radius: 8px;
              box-shadow: 0 2px 8px rgba(0, 0, 0, 10%);

              > div {
                display: flex;
                align-items: center;
                margin-top: 24px;

                > :nth-child(1) {
                  width: 78px;
                  min-width: 78px;
                  margin-left: 24px;
                  font-size: 16px;
                  color: #000;
                }

                > :nth-child(2) {
                  margin-left: 16px;

                  img {
                    width: 24px;
                  }

                  .btn {
                    display: flex;
                    align-items: center;
                    width: 270px;
                    height: 40px;
                    cursor: pointer;
                    background: #fff;
                    border: 1px solid #dbdbdb;
                    border-radius: 4px;

                    img {
                      margin-right: 8px;
                      margin-left: 16px;
                    }
                  }

                  .btn:not(:nth-child(1)) {
                    margin-top: 8px;
                  }
                }
              }
            }
          }
        }
      }
    }
  }
}
</style>

<style lang="scss">
.el-collapse {
  width: 670px;
  border-style: none;

  &-item + &-item {
    margin-top: 12px;
  }

  .el-collapse-item__header {
    border-style: none;

    .l-collapse-item__arrow,
    .el-icon-arrow-right {
      display: none;
    }
  }

  .el-collapse-item__wrap {
    border-style: none;
  }

  .el-collapse-item__content {
    padding-bottom: 0;
  }
}
</style>
