<!--课程预览-->
<template>
  <div class="coursePreview">
    <p class="reset-button-one" style="margin:20px 0 0 20px;font-weight:700;" @click="backPage"><i class="el-icon-arrow-left"></i>返回</p>
    <div class="course-info">
      <div class="name-p">{{exerciseData.title}}</div>
      <!--<div class="item-p">{{exerciseData.title}}</div>-->
      <div class="title-p">时长：{{exerciseData.durationStr}}</div>
      <p class="num-p"></p>
    </div>
    <div class="center-info-components-max-box scrollbar-box" v-if="loading">
      <!--图片-->
      <img
        style="display: block;margin:0 auto;max-width:900px;"
        v-if="exerciseData.postfix == 'png' || exerciseData.postfix == 'jpeg' || exerciseData.postfix == 'gif'"
        :src="exerciseData.chapterData">
      <!--视频-->
      <!--<video-player-->
        <!--class="video-player vjs-custom-skin"-->
        <!--v-if="exerciseData.postfix == 'mp4' || exerciseData.postfix == 'webm'"-->
        <!--@pause="demo($event)"-->
        <!--:playsinline="true"-->
        <!--:options="playerOptions">-->
      <!--</video-player>-->
      <!--poster="@/assets/ZDimages/video_logo.jpg"-->
      <video class="video-player vjs-custom-skin"
             style="width:910px;height:512px;"
             autoplay="autoplay"
             :poster="videoCover"
             v-if="exerciseData.chapterData && exerciseData.postfix == 'mp4'">
        <source :src="exerciseData.chapterData" type="video/mp4">
      </video>
      <!--word-->
      <iframe
        class="iframe"
        v-if="exerciseData.postfix == 'pdf' || exerciseData.postfix == 'doc' || exerciseData.postfix == 'docx' || exerciseData.postfix == 'ppt' || exerciseData.postfix == 'pptx'"
        :src="exerciseData.iframeSrc" scrolling="auto" frameborder="0">
      </iframe>
      <!--富文本-->
      <div v-if="exerciseData.type == 5" v-html="exerciseData.chapterData"></div>
    </div>
  </div>
</template>

<script>
  import { videoPlayer } from 'vue-video-player'
  export default {
    name: 'coursePreview',
    props:{
      exerciseData:{},
    },
    components:{
      videoPlayer
    },
    data() {
      return {
        videoCover:window.location.href.split('://')[0]+'://' + process.env.VUE_APP_BASE_API + localStorage.getItem('videoCover'),
        loading:false,
        playerOptions: {
          playbackRates: [0.5, 1.0, 1.5, 2.0], // 可选的播放速度
          autoplay: false, // 如果为true,浏览器准备好时开始回放。
          muted: false, // 默认情况下将会消除任何音频。
          loop: false, // 是否视频一结束就重新开始。
          preload: 'auto', // 建议浏览器在<video>加载元素后是否应该开始下载视频数据。auto浏览器选择最佳行为,立即开始加载视频（如果浏览器支持）
          language: 'zh-CN',
          aspectRatio: '16:9', // 将播放器置于流畅模式，并在计算播放器的动态大小时使用该值。值应该代表一个比例 - 用冒号分隔的两个数字（例如"16:9"或"4:3"）
          fluid: true, // 当true时，Video.js player将拥有流体大小。换句话说，它将按比例缩放以适应其容器。
          sources: [],
          poster: '', // 封面地址
          notSupportedMessage: '此视频暂无法播放，请稍后再试', // 允许覆盖Video.js无法播放媒体源时显示的默认信息。
          controlBar: {
            timeDivider: true, // 当前时间和持续时间的分隔符
            durationDisplay: true, // 显示持续时间
            remainingTimeDisplay: false, // 是否显示剩余时间功能
            fullscreenToggle: true // 是否显示全屏按钮
          }
        },
      }
    },
    created() {

    },
    mounted() {
      let self = this;
      setTimeout(function(){
        self.judgeFunction();
      },500);
    },
    methods: {
      //返回
      backPage(){
        this.$parent.goPage(1);
      },
      judgeFunction(){
        if(this.exerciseData.postfix == "mp4"){
          console.log("视频")
          // this.getVideo();
          this.loading = true;
        }else if(this.exerciseData.postfix == "pdf" || this.exerciseData.postfix == "doc" || this.exerciseData.postfix == "docx"||this.exerciseData.postfix == "ppt" || this.exerciseData.postfix == "pptx"){
          console.log("文档")
          this.getWord();
        }else if(this.exerciseData.type == 5){
          console.log("富文本")
          this.getRichText();
        }
      },
      //富文本处理
      getRichText(){
        this.exerciseData.chapterData = unescape(this.exerciseData.chapterData)
        this.loading = true;
      },
      //视频处理
      getVideo(){
        let list = [];
        let obj = {
          type:'video/'+this.exerciseData.postfix,
          src:this.exerciseData.chapterData,
        };
        list.push(obj);
        this.playerOptions.sources = list;
        this.loading = true;
      },
      //word处理
      async getWord(){
        this.exerciseData.iframeSrc = this.urlJudge(this.exerciseData.chapterData)
        this.loading = true;
      },
    }
  }
</script>

<style scoped lang="scss">
  .coursePreview{
    flex:1;
    display: flex;
    flex-direction: column;
    overflow-y: scroll;
    *{
      margin:0;
      padding:0;
      font-weight:500;
      color:#333;
    }
    .course-info{
      .name-p{
        color:#333;
        font-size:18px;
        line-height:30px;
        font-weight:700;
        margin:10px 40px 0;
      }
      .item-p{
        color:#333;
        font-size:18px;
        line-height:30px;
        margin:0 40px;
      }
      .title-p{
        color:#333;
        font-size:18px;
        line-height:30px;
        margin:0 40px 10px;
      }
      .num-p{
        border-bottom:3px dashed #dedede;
      }
    }
    .center-info-components-max-box{
      margin:20px;
      overflow-y: scroll;
      flex:1;
      display: flex;
      flex-direction: column;
      position: relative;
      .video-player{
        position: absolute;
        top:50%;
        left:50%;
        margin-top:-315px;
        margin-left:-560px;
        height:630px;
        width: 1120px;
      }
      iframe{
        flex:1;
      }
    }
  }
</style>
