<template>
  <view class="uni-swiper__warp">
    <slot/>
    <view
      v-if="mode === 'default'"
      :style="{'bottom':dots.bottom + 'px'}"
      class="uni-swiper__dots-box">
      <view
        v-for="(item,index) in info"
        :style="{
        'width': (index === current? dots.width*2:dots.width ) + 'px','height':dots.width/3 +'px' ,'background-color':index !== current?dots.backgroundColor:dots.selectedBackgroundColor,'border-radius':'0px'}"
        :key="index"
        class="uni-swiper__dots-item uni-swiper__dots-bar"/>
    </view>
    <view
      v-if="mode === 'dot'"
      :style="{'bottom':dots.bottom + 'px'}"
      class="uni-swiper__dots-box">
      <view
        v-for="(item,index) in info"
        :style="{
        'width': dots.width + 'px','height':dots.height +'px' ,'background-color':index !== current?dots.backgroundColor:dots.selectedBackgroundColor,'border':index !==current ? dots.border:dots.selectedBorder}"
        :key="index"
        class="uni-swiper__dots-item"/>
    </view>
		<view v-if="mode === 'round'" :style="{'bottom':dots.bottom + 'px'}" class="uni-swiper__dots-box">
			<view v-for="(item,index) in info" :class="[index === current&&'uni-swiper__dots-long']" :style="{
		    'width':(index === current? dots.width*3:dots.width ) + 'px','height':dots.height +'px' ,'background-color':index !== current?dots.backgroundColor:dots.selectedBackgroundColor,'border':index !==current ? dots.border:dots.selectedBorder}" :key="index" class="uni-swiper__dots-item " />
		</view>
    <view
      v-if="mode === 'nav'"
      :style="{'background-color':dotsStyles.backgroundColor}"
      class="uni-swiper__dots-box uni-swiper__dots-nav">
      <view
        :style="{'color':dotsStyles.color}"
        class="uni-swiper__dots-nav-item">{{ (current+1)+"/"+info.length }}
        {{ info[current][field] }}</view>
    </view>
    <view
      v-if="mode === 'indexes'"
      :style="{'bottom':dots.bottom + 'px'}"
      class="uni-swiper__dots-box">
      <view
        v-for="(item,index) in info"
        :style="{
        'width':dots.width + 'px','height':dots.height +'px' ,'color':index === current?dots.selectedColor:dots.color,'background-color':index !== current?dots.backgroundColor:dots.selectedBackgroundColor,'border':index !==current ? dots.border:dots.selectedBorder}"
        :key="index"
        class="uni-swiper__dots-item uni-swiper__dots-indexes">{{ index+1 }}</view>
    </view>
  </view>
</template>

<script>
export default {
  name: 'UniSwiperDot',
  props: {
    info: {
      type: Array,
      default () {
        return []
      }
    },
    current: {
      type: Number,
      default: 0
    },
    dotsStyles: {
      type: Object,
      default () {
        return {}
      }
    },
    // 类型 ：default(默认) indexes long nav
    mode: {
      type: String,
      default: 'default'
    },
    // 只在 nav 模式下生效，变量名称
    field: {
      type: String,
      default: ''
    }
  },
  data () {
    return {
      dots: {
        width: 8,
        height: 8,
        bottom: 10,
        color: '#fff',
        backgroundColor: 'rgba(0, 0, 0, .3)',
        border: '1px rgba(0, 0, 0, .3) solid',
        selectedBackgroundColor: '#333',
        selectedBorder: '1px rgba(0, 0, 0, .9) solid'
      }
    }
  },
  watch: {
    dotsStyles (newVal) {
      this.dots = Object.assign(this.dots, this.dotsStyles)
    },
    mode (newVal) {
      if (newVal === 'indexes') {
        this.dots.width = 20
        this.dots.height = 20
      } else {
        this.dots.width = 8
        this.dots.height = 8
      }
    }

  },
  created () {
    if (this.mode === 'indexes') {
      this.dots.width = 20
      this.dots.height = 20
    }
    this.dots = Object.assign(this.dots, this.dotsStyles)
  }
}
</script>

<style>
	.uni-swiper__warp {
		position: relative;
		width: 100%;
		box-sizing: border-box;
		overflow: hidden;
	}

	.uni-swiper__dots-box {
		position: absolute;
		bottom: 20rpx;
		display: flex;
		justify-content: center;
		align-items: center;
		box-sizing: box-sizing;
		width: 100%;
	}

	.uni-swiper__dots-item {
		flex-shrink: 0;
		width: 16rpx;
		border-radius: 50%;
		margin-left: 12rpx;
		background: rgba(0, 0, 0, .3);
		transition: all 0.2s linear;
	}

	.uni-swiper__dots-item:first-child {
		margin: 0;
	}

	.uni-swiper__dots-default {
		border-radius: 50%;
	}

	.uni-swiper__dots-long {
		border-radius: 100rpx;
	}

  .uni-swiper__dots-bar {
    border-radius: 100rpx;
  }

	.uni-swiper__dots-nav {
		bottom: 0;
		height: 80rpx;
		justify-content: flex-start;
		background: rgba(0, 0, 0, 0.2);
		box-sizing: box-sizing;
		overflow: hidden;
	}

	.uni-swiper__dots-nav-item {
		overflow: hidden;
		text-overflow: ellipsis;
		white-space: nowrap;
		font-size: 28rpx;
		color: #fff;
		box-sizing: box-sizing;
		margin: 0 30rpx;
	}

	.uni-swiper__dots-indexes {
		display: flex;
		justify-content: center;
		align-items: center;
		color: #fff;
		font-size: 24rpx;
	}
</style>
