<template>
  <div class="spinner-box" v-show="loading">
    <div class="spinner-inner" :style="{color: color}">
      <div class="la-ball-beat">
        <div :style="spinnerStyle"></div>
        <div :style="spinnerStyle"></div>
        <div :style="spinnerStyle"></div>
      </div>
      <slot></slot>
    </div>
  </div>
</template>

<script>
  export default {
    name: 'Loader',
    props: {
      loading: {
        type: Boolean,
        default: true
      },
      color: {
        type: String,
        default: 'rgba(197, 197, 197, 0.4)'
      },
      height: {
        type: String,
        default: '15px'
      },
      width: {
        type: String,
        default: '15px'
      },
      margin: {
        type: String,
        default: '5px'
      }
    },
    data () {
      return {
        spinnerStyle: {
          backgroundColor: this.color,
          height: this.height,
          width: this.width,
          margin: this.margin
        }
      }
    }
  }
</script>

<style lang="scss" scoped>
  @import '~assets/scss/mixins';
  @import '~assets/scss/variables';
  .spinner-box {
    position: relative;
    width: 100%;
    min-height: 50px;
    height: 100%;
    > .spinner-inner {
      width: 80px;
      height: 30px;
      position: absolute;
      top: 50%;
      left: 50%;
      margin-left: -40px;
      margin-top: -15px;
      text-align: center;
      > .la-ball-beat {
        display: block;
        position: relative;
        box-sizing: border-box;
        font-size: 0;
        color: #fff;
        width: 80px;
        height: 30px;
        > div {
          position: relative;
          box-sizing: border-box;
          display: inline-block;
          float: none;
          border: none;
          width: 15px;
          height: 15px;
          margin: 5px;
          background-color: $module-hover-bg;
          @include css3-prefix(animation, ball-beat 0.7s -0.15s infinite linear);
          &:nth-child(2n-1) {
            @include css3-prefix(animation-delay, -.5s);
          }
        }
        &.la-sm {
          width: 26px;
          height: 8px;
          > div {
            width: 8px;
            height: 8px;
            margin: 3px;
          }
        }
        &.la-2x {
          width: 108px;
          height: 36px;
          > div {
            width: 20px;
            height: 20px;
            margin: 8px;
          }
        }
        &.la-3x {
          width: 162px;
          height: 54px;
          > div {
            width: 30px;
            height: 30px;
            margin: 12px
          }
        }
      }
    }
  }
  @include keyframes(ball-beat) {
    50% {
      opacity: .2;
      @include css3-prefix(transform, scale(0.75));
    }
    100% {
      opacity: 1;
      @include css3-prefix(transform, scale(1));
    }
  }
</style>
