<template>
	<view class="live-camera" :style="{ width: windowWidth, height: windowHeight }">
		<view class="preview" :style="{ width: windowWidth, height: windowHeight - 80 }">
			<live-pusher
				id="livePusher"
				ref="livePusher"
				class="livePusher"
				mode="FHD"
				beauty="0"
				whiteness="0"
				:aspect="aspect"
				min-bitrate="1000"
				audio-quality="16KHz"
				device-position="back"
				:auto-focus="true"
				:muted="true"
				:enable-camera="true"
				:enable-mic="false"
				:zoom="false"
				@statechange="statechange"
				:style="{ width: cameraWidth, height: cameraHeight }"
			></live-pusher>

			<!--提示语-->
			<cover-view class="remind">
				<text class="remind-text" style="">{{ message }}</text>
			</cover-view>

			<!--辅助线-->
			<cover-view class="outline-box" :style="{ width: windowWidth, height: windowHeight - 80 }">
				<cover-image
					class="outline-img"
					:src="dotype == 'idcardface' ? '/static/live-camera/outline/idcardface.png' : '/static/live-camera/outline/idcardbadge.png'"
					style=""
				></cover-image>
			</cover-view>
		</view>

		<view class="menu">
			<!--底部菜单区域背景-->
			<cover-image class="menu-mask" src="/static/live-camera/bar.png"></cover-image>

			<!--返回键-->
			<cover-image class="menu-back" @tap="back" src="/static/live-camera/back.png"></cover-image>

			<!--快门键-->
			<cover-image class="menu-snapshot" @tap="snapshot" src="/static/live-camera/shutter.png"></cover-image>

			<!--反转键-->
			<cover-image class="menu-flip" @tap="flip" src="/static/live-camera/flip.png"></cover-image>
		</view>
	</view>
</template>

<script>
let _this = null;
export default {
	data() {
		return {
			poenCarmeInterval: null, //打开相机的轮询
			dotype: 'face', //操作类型
			message: '', //提示
			aspect: '2:3', //比例
			cameraWidth: '', //相机画面宽度
			cameraHeight: '', //相机画面宽度
			windowWidth: '', //屏幕可用宽度
			windowHeight: '', //屏幕可用高度
			camerastate: false, //相机准备好了
			livePusher: null, //流视频对象
			snapshotsrc: null //快照
		};
	},
	onLoad(e) {
		_this = this;
		this.dotype = e.dotype;
		this.initCamera();
	},
	onReady() {
		this.livePusher = uni.createLivePusherContext('livePusher', this);
		this.startPreview(); //开启预览并设置摄像头
		this.poenCarme();
	},
	methods: {
		//轮询打开
		poenCarme() {
			//#ifdef APP-PLUS
			if (plus.os.name == 'Android') {
				this.poenCarmeInterval = setInterval(function() {
					console.log(_this.camerastate);
					if (!_this.camerastate) _this.startPreview();
				}, 2500);
			}
			//#endif
		},
		//初始化相机
		initCamera() {
			//处理安卓手机异步授权问题
			uni.getSystemInfo({
				success: function(res) {
					_this.windowWidth = res.windowWidth;
					_this.windowHeight = res.windowHeight;
					_this.cameraWidth = res.windowWidth;
					_this.cameraHeight = res.windowWidth * 1.5;
				}
			});
		},

		//开始预览
		startPreview() {
			this.livePusher.startPreview({
				success: a => {
					console.log(a);
				}
			});
		},

		//停止预览
		stopPreview() {
			this.livePusher.stopPreview({
				success: a => {
					_this.camerastate = false; //标记相机未启动
				}
			});
		},

		//状态
		statechange(e) {
			//状态改变
			console.log(e);
			if (e.detail.code == 1007) {
				_this.camerastate = true;
			} else if (e.detail.code == -1301) {
				_this.camerastate = false;
			}
		},

		//返回
		back() {
			uni.navigateBack();
		},

		//抓拍
		snapshot() {
			this.livePusher.snapshot({
				success: e => {
					_this.snapshotsrc = e.message.tempImagePath;
					_this.stopPreview();
					_this.setImage();
					uni.navigateBack();
				}
			});
		},

		//反转
		flip() {
			this.livePusher.switchCamera();
		},

		//设置
		setImage() {
			let pages = getCurrentPages();
			let prevPage = pages[pages.length - 2]; //上一个页面

			//直接调用上一个页面的setImage()方法，把数据存到上一个页面中去
			prevPage.$vm.setImage({ path: _this.snapshotsrc, dotype: this.dotype });
		}
	}
};
</script>

<style lang="scss">
.live-camera {
	.preview {
		justify-content: center;
		align-items: center;
		.outline-box {
			position: absolute;
			top: 0;
			left: 0;
			bottom: 0;
			z-index: 99;
			align-items: center;
			justify-content: center;
			.outline-img {
				width: 750rpx;
				height: 1125rpx;
			}
		}
		.remind {
			position: absolute;
			top: 880rpx;
			width: 750rpx;
			z-index: 100;
			align-items: center;
			justify-content: center;
			.remind-text {
				color: #dddddd;
				font-weight: bold;
			}
		}
	}
	.menu {
		position: absolute;
		left: 0;
		bottom: 0;
		width: 750rpx;
		height: 180rpx;
		z-index: 98;
		align-items: center;
		justify-content: center;
		.menu-mask {
			position: absolute;
			left: 0;
			bottom: 0;
			width: 750rpx;
			height: 180rpx;
			z-index: 98;
		}
		.menu-back {
			position: absolute;
			left: 30rpx;
			bottom: 50rpx;
			width: 80rpx;
			height: 80rpx;
			z-index: 99;
			align-items: center;
			justify-content: center;
		}
		.menu-snapshot {
			width: 130rpx;
			height: 130rpx;
			z-index: 99;
		}
		.menu-flip {
			position: absolute;
			right: 30rpx;
			bottom: 50rpx;
			width: 80rpx;
			height: 80rpx;
			z-index: 99;
			align-items: center;
			justify-content: center;
		}
	}
}
</style>
