<template>
  <view v-if="showPopup" class="uni-popup">
    <!-- 遮罩层结构 -->
    <view
        :class="[ani, animation ? 'ani' : '', !custom ? 'uni-custom' : '']"
        class="uni-popup__mask"
        @click="close(true)"
    />
    <!-- 弹窗主题利用插槽 -->
    <view
        :class="[type, ani, animation ? 'ani' : '', !custom ? 'uni-custom' : '']"
        class="uni-popup__wrapper"
        @click="close(true)"
    >
      <view class="uni-popup__wrapper-box" @click.stop="clear">
        <slot />
      </view>
    </view>
  </view>
</template>
<script>
export default {
  name: 'UniPopup',
  props: {
    // 开启动画
    animation: {
      type: Boolean,
      default: true
    },
    // 弹出层类型，可选值，top: 顶部弹出层；bottom：底部弹出层；center：全屏弹出层
    type: {
      type: String,
      default: 'center'
    },
    // 是否开启自定义
    custom: {
      type: Boolean,
      default: false
    },
    // maskClick
    maskClick: {
      type: Boolean,
      default: true
    },
    show: {
      type: Boolean,
      default: true
    }
  },
  data() {
    return {
      ani: '', // 动画样式类名
      showPopup: false
    }
  },
  watch: {
    show(newValue) {
      if (newValue) {
        this.open()
      } else {
        this.close()
      }
    }
  },
  created() {},
  methods: {
    clear() {},
    open() {
      this.$emit('change', {
        show: true
      })
      this.showPopup = true
      this.$nextTick(() => {
        setTimeout(() => {
          this.ani = 'uni-' + this.type
        }, 30)
      })
    },
    close(type) {
      if (!this.maskClick && type) return
      this.$emit('change', {
        show: false
      })
      this.ani = ''
      this.$nextTick(() => {
        setTimeout(() => {
          this.showPopup = false
        }, 300)
      })
    }
  }
}
</script>
<style>
@charset "UTF-8";

.uni-popup {
  position: fixed;
  top: 0;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 998;
  overflow: hidden
}

.uni-popup__mask {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 998;
  background: rgba(0, 0, 0, .4);
  opacity: 0
}

.uni-popup__mask.ani {
  transition: all .3s
}

.uni-popup__mask.uni-bottom,
.uni-popup__mask.uni-center,
.uni-popup__mask.uni-top {
  opacity: 1
}

.uni-popup__wrapper {
  position: absolute;
  z-index: 999;
  box-sizing: border-box
}

.uni-popup__wrapper.ani {
  transition: all .3s
}

.uni-popup__wrapper.top {
  top: 0;
  left: 0;
  width: 100%;
  transform: translateY(-100%)
}

.uni-popup__wrapper.bottom {
  bottom: 0;
  left: 0;
  width: 100%;
  transform: translateY(100%)
}

.uni-popup__wrapper.center {
  width: 100%;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  transform: scale(1.2);
  opacity: 0
}

.uni-popup__wrapper-box {
  position: relative;
  box-sizing: border-box
}

.uni-popup__wrapper.uni-custom .uni-popup__wrapper-box {
  padding: 30upx;
  background: #fff
}

.uni-popup__wrapper.uni-custom.center .uni-popup__wrapper-box {
  position: relative;
  max-width: 80%;
  max-height: 80%;
  overflow-y: scroll
}

.uni-popup__wrapper.uni-custom.bottom .uni-popup__wrapper-box,
.uni-popup__wrapper.uni-custom.top .uni-popup__wrapper-box {
  width: 100%;
  max-height: 500px;
  overflow-y: scroll
}

.uni-popup__wrapper.uni-bottom,
.uni-popup__wrapper.uni-top {
  transform: translateY(0)
}

.uni-popup__wrapper.uni-center {
  transform: scale(1);
  opacity: 1
}
</style>
