<template>
	<view class="uni-countdown">
		<view
			v-if="showDay && d > 0"
			:style="{ borderColor: borderColor, color: color, background: backgroundColor }"
			class="uni-countdown__number "
			:class="[backgroundColorClass, colorClass, borderColorClass]"
		>
			{{ d }}
		</view>
		<view v-if="showDay && d > 0" :style="{ color: splitorColor }" class="uni-countdown__splitor day" :class="splitorColorClass">{{ showColon ? '天' : '天' }}</view>
		<view
			:style="{ borderColor: borderColor, color: color, background: backgroundColor }"
			class="uni-countdown__number "
			:class="[backgroundColorClass, colorClass, borderColorClass]"
		>
			{{ h }}
		</view>
		<view :style="{ color: splitorColor }" class="uni-countdown__splitor" :class="splitorColorClass">{{ showColon ? ':' : '时' }}</view>
		<view
			:style="{ borderColor: borderColor, color: color, background: backgroundColor }"
			class="uni-countdown__number "
			:class="[backgroundColorClass, colorClass, borderColorClass]"
		>
			{{ i }}
		</view>
		<view :style="{ color: splitorColor }" class="uni-countdown__splitor" :class="splitorColorClass">{{ showColon ? ':' : '分' }}</view>
		<view
			:style="{ borderColor: borderColor, color: color, background: backgroundColor }"
			class="uni-countdown__number "
			:class="[backgroundColorClass, colorClass, borderColorClass]"
		>
			{{ s }}
		</view>
		<view v-if="!showColon" :style="{ color: splitorColor }" class="uni-countdown__splitor" :class="splitorColorClass">秒</view>
	</view>
</template>
<script>
export default {
	name: 'UniCountDown',
	props: {
		showDay: {
			type: Boolean,
			default: true
		},
		showColon: {
			type: Boolean,
			default: true
		},
		backgroundColor: {
			type: String,
			default: '#FFFFFF'
		},
		backgroundColorClass: {
			type: String,
			default: ''
		},
		borderColor: {
			type: String,
			default: '#000000'
		},
		borderColorClass: {
			type: String,
			default: ''
		},
		color: {
			type: String,
			default: '#000000'
		},
		colorClass: {
			type: String,
			default: ''
		},
		splitorColor: {
			type: String,
			default: '#000000'
		},
		splitorColorClass: {
			type: String,
			default: ''
		},
		day: {
			type: [Number, String],
			default: 0
		},
		hour: {
			type: [Number, String],
			default: 0
		},
		minute: {
			type: [Number, String],
			default: 0
		},
		second: {
			type: [Number, String],
			default: 0
		}
	},
	data() {
		return {
			timer: null,
			d: '00',
			h: '00',
			i: '00',
			s: '00',
			leftTime: 0,
			seconds: 0
		};
	},
	mounted: function(e) {
		this.seconds = this.toSeconds(this.day, this.hour, this.minute, this.second);
		this.countDown();
		this.timer = setInterval(() => {
			this.seconds--;
			if (this.seconds < 0) {
				this.timeUp();
				return;
			}
			this.countDown();
		}, 1000);
	},
	watch: {
		day: function(newVal) {
			this.timeUp();
			this.seconds = this.toSeconds(this.day, this.hour, this.minute, this.second);
			this.countDown();
			this.timer = setInterval(() => {
				this.seconds--;
				if (this.seconds < 0) {
					this.timeUp();
					return;
				}
				this.countDown();
			}, 1000);
		},
		hour: function(newVal) {
			this.timeUp();
			this.seconds = this.toSeconds(this.day, this.hour, this.minute, this.second);
			this.countDown();
			this.timer = setInterval(() => {
				this.seconds--;
				if (this.seconds < 0) {
					this.timeUp();
					return;
				}
				this.countDown();
			}, 1000);
		},
		minute: function(newVal) {
			this.timeUp();
			this.seconds = this.toSeconds(this.day, this.hour, this.minute, this.second);
			this.countDown();
			this.timer = setInterval(() => {
				this.seconds--;
				if (this.seconds < 0) {
					this.timeUp();
					return;
				}
				this.countDown();
			}, 1000);
		},
		second: function(newVal) {
			this.timeUp();
			this.seconds = this.toSeconds(this.day, this.hour, this.minute, this.second);
			this.countDown();
			this.timer = setInterval(() => {
				this.seconds--;
				if (this.seconds < 0) {
					this.timeUp();
					return;
				}
				this.countDown();
			}, 1000);
		}
	},

	beforeDestroy() {
		clearInterval(this.timer);
	},
	methods: {
		toSeconds(day, hours, minutes, seconds) {
			day = Number(day);
			hours = Number(hours);
			minutes = Number(minutes);
			seconds = Number(seconds);
			return day * 60 * 60 * 24 + hours * 60 * 60 + minutes * 60 + seconds;
		},
		timeUp() {
			clearInterval(this.timer);
			this.$emit('timeup');
		},
		countDown() {
			let seconds = this.seconds;
			let [day, hour, minute, second] = [0, 0, 0, 0];
			if (seconds > 0) {
				day = Math.floor(seconds / (60 * 60 * 24));
				hour = Math.floor(seconds / (60 * 60)) - day * 24;
				minute = Math.floor(seconds / 60) - day * 24 * 60 - hour * 60;
				second = Math.floor(seconds) - day * 24 * 60 * 60 - hour * 60 * 60 - minute * 60;
			} else {
				this.timeUp();
			}
			if (day < 10) {
				day = '0' + day;
			}
			if (hour < 10) {
				hour = '0' + hour;
			}
			if (minute < 10) {
				minute = '0' + minute;
			}
			if (second < 10) {
				second = '0' + second;
			}
			this.d = day;
			this.h = hour;
			this.i = minute;
			this.s = second;
		}
	}
};
</script>
<style lang="scss">

.uni-countdown {
	padding: 2rpx 0;
	display: inline-flex;
	flex-wrap: nowrap;
	justify-content: center;
}

.uni-countdown__splitor {
	justify-content: center;
	line-height: 44rpx;
	padding: 0 5rpx;
	font-size: 24rpx;
}
.uni-countdown__splitor.day {
	line-height: 50rpx;
}

.uni-countdown__number {
	line-height: 44rpx;
	justify-content: center;
	height: 44rpx;
	border-radius: 6rpx;
	margin: 0 5rpx;
	border: 2rpx solid #000;
	font-size: 24rpx;
	padding: 0 10rpx;
}
</style>
