<template>
  <div class="song-list">
    <ul>
      <li @click="selectList(item,index)" v-for="(item,index) in songs" :key="index" class="item">
        <div class="rank" v-show="rank">
          <span :class="getRankCls(index)">{{getRankText(index)}}</span>
        </div>
        <div class="content">
          <h2 class="name">{{item.name}}</h2>
          <p class="desc">{{item.singer}}·{{item.album}}</p>
        </div>
      </li>
    </ul>
  </div>
</template>

<script type="text/ecmascript-6">
export default {
  props: {
    songs: {
      type: Array,
      default: []
    },
    rank: {
      type: Boolean,
      default: false
    }
  },
  methods: {
    selectList(item, index) {
      this.$emit("select", item, index);
    },
    //前三名的图标
    getRankCls(index) {
      //判断index小于等于2的时候，就进入icon，否则为text
      if (index <= 2) {
        return `icon icon${index}`;
      } else {
        return "text";
      }
    },
    getRankText(index) {
      //下标大于2 的话 就下标加1
      if (index > 2) index + 1;
    }
  }
};
</script>

<style scoped lang="stylus" rel="stylesheet/stylus">
@import '~style/style/variable';
@import '~style/style/mixin';

.song-list {
  .item {
    display: flex;
    align-items: center;
    box-sizing: border-box;
    text-align: left;
    height: 64px;
    font-size: $font-size-medium;

    .rank {
      flex: 0 0 25px;
      width: 25px;
      height: 100%;
      margin-right: 30px;
      text-align: center;

      .icon {
        display: inline-block;
        width: 25px;
        height: 24px;
        background-size: 25px 24px;
        margin-top: 10px;

        &.icon0 {
          bg-image('first');
        }

        &.icon1 {
          bg-image('second');
        }

        &.icon2 {
          bg-image('third');
        }
      }

      .text {
        color: $color-theme;
        font-size: $font-size-large;
      }
    }

    .content {
      flex: 1;
      line-height: 20px;
      overflow: hidden;
      margin-left: 39px;

      .name {
        no-wrap();
        color: $color-text;
      }

      .desc {
        no-wrap();
        margin-top: 4px;
        color: $color-text-d;
      }
    }
  }
}
</style>