<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] && 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: 60rpx;
		justify-content: flex-start;
		background: rgba(0, 0, 0, 0.2);
		box-sizing: box-sizing;
		overflow: hidden;
		z-index: 10;
	}

	.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>
