<template>
	<view class="navigationBarView">
		<view class="back-btn" @click="back">
			<image class="arrow-bg" :src="require('../static/images/icon-back-bg.png')"></image>
			<!-- <text>返回</text> -->
		</view>
		<view class="countdown" v-if="maxTimer">{{timer}}s</view>
	</view>
</template>

<script>
	export default {
		props: {
			maxTimer: {
				type: Number
			}
		},
		data() {
			return {
				timer: 60,
				navTimer: ''
			};
		},

		created() {
			console.log(1)
			if (this.maxTimer) {
				this.timer = this.maxTimer;
				this.countdown()
			}
		},

		beforeDestroy() {
			clearInterval(this.navTimer)
		},

		methods: {
			countdown() {
				const $this = this;
				clearInterval(this.navTimer);
				this.navTimer = setInterval(function() {
					// console.log($this.timer)
					$this.timer = $this.timer - 1;
					if ($this.timer == 0) {
						clearInterval($this.navTimer);
						uni.navigateBack();
						return;
					}
				}, 1000)
			},
			back() {
				uni.navigateBack();
			},

			clearTimer() {
				clearInterval(this.navTimer);
			}
		}
	}
</script>

<style lang="scss">
	.navigationBarView {
		position: relative;
		display: flex;
		align-items: center;
		justify-content: space-between;
		width: 100vw;
		padding-top: 5.4vw;
		z-index: 1;

		.back-btn {
			position: relative;
			display: flex;
			align-items: center;
			// justify-content: center;
			width: 39.8vw;
			height: 12.5vw;
			border-radius: 0 12.5vw 12.5vw 0;
			
			
			.arrow-bg {
				position: absolute;
				top: 0;
				left: 0;
				width: 39.8vw;
				height: 12.5vw;
			}

			.arrow {
				width: 2.5vw;
				height: 4.2vw;
				margin-right: 1.7vw;
			}
			
			text {
				position: relative;
				margin-left: 10.4vw;
				color: #FFFFFF;
				font-size: 5vw;
			}
		}

		.countdown {
			color: #1994D7;
			margin-right: 3.3vw;
			font-size: 5vw;
			font-weight: 600;
		}
	}
</style>
