export { SCANNING_PHOTO_RESULT, SCANNING_PHOTO_RESULT_BOUND, Call_BACK, AUTH_CALL_BACK_TYPE } from '../interface.uts';
import Zxing from "./zxing.js"
var qre;
var resultQr = ""
var cid
// https://www.npmjs.com/package/qr-scanner/v/1.4.2?activeTab=readme
export function closeCamera() {
	let parentView = document.getElementById("xScannigDiv")
	if (parentView) {
		parentView.remove()
	}
	if (qre) {
		qre.getTracks().forEach(function (track) {
			track.stop();
		});
	}
	resultQr = ""
	
}
// @ts-ignore
export function openCameraApi(callback : Call_BACK,onlyCameras:boolean) {
	qre = null;
	resultQr = ""
	let onleyCamrae = onlyCameras
	scanning()

	function scanning() {
		closeCamera();
		let parenView : HTMLElement = document.createElement("div")
		parenView.id = 'xScannigDiv';
		parenView.style.position = "fixed"
		parenView.style.left = "0px"
		parenView.style.top = "0px"
		parenView.style.width = "100%"
		parenView.style.height = "100%"
		parenView.style.zIndex = "888"
		parenView.style.backgroundColor = "#000"
		parenView.style.display = "flex"
		parenView.style.flexDirection = "column"
		parenView.style.transitionDuration = '0.25s'
		parenView.style.transitionProperty = 'transform'
		parenView.style.transitionTimingFunction = 'linear'
		parenView.style.transform = 'scale(0)'

		let backText = document.createElement("div")
		backText.innerText = "返回"
		backText.style.fontSize = "16px"
		backText.style.height = "50px"
		backText.style.lineHeight = "50px"
		backText.style.padding = "0px 20px"
		backText.style.color = "white"
		backText.onclick = function () {
			closeCamera()
		}

		let video : HTMLVideoElement = document.createElement("video")
		video.style.flex = "1"
		video.style.backgroundColor = '#111'
		video.style.width = '100%'
		video.style.objectFit = 'cover'
		
		video.playsInline = true;
		video.muted = true;
		video.autoplay = true;
		video.controls = false;
		// 针对微信的x5内核
		video.setAttribute('playsinline',true)
		video.setAttribute('webkit-playsinline',true)
		video.setAttribute('x5-playsinline',true)
		video.setAttribute('x5-video-player-type','h5')
		video.setAttribute('x5-video-player-fullscreen','false')
		
		
		let bottomView = document.createElement("div")
		bottomView.style.height = "100px"
		bottomView.style.display = "flex"
		bottomView.style.flexDirection = "row"
		bottomView.style.justifyContent = "space-between"

		let photo = document.createElement("div")
		photo.innerText = onleyCamrae?"":"相册选取"
		photo.style.fontSize = "16px"
		photo.style.height = "50px"
		photo.style.lineHeight = "50px"
		photo.style.padding = "0px 20px"
		photo.style.color = "white"
		let scan = document.createElement("div")
		scan.innerText = "扫一扫"
		scan.style.fontSize = "16px"
		scan.style.height = "50px"
		scan.style.lineHeight = "50px"
		scan.style.padding = "0px 20px"
		scan.style.color = "white"
		photo.onclick = function () {
			if(onleyCamrae) return;
			uni.chooseImage({
				sourceType:["album"],
				success(res) {
					if (res.tempFilePaths.length > 0) {
						
						let img = new Image()
						img.src = res.tempFilePaths[0];
						img.onload = function () {
							closeCamera();
							var newWidth = 600;
							// @ts-ignore
							var newHeight =  newWidth*img.width / img.height;
							var canvas = document.createElement('canvas');
							canvas.width = 600;
							canvas.height = 600;
							var ctx = canvas.getContext('2d');
							ctx.clearRect(0, 0, newWidth, newHeight)
							ctx.drawImage(img, 0, 0, newWidth, newHeight)
							var imageData = ctx.getImageData(0, 0, 600, 600);
							let code = new Zxing(imageData.data,600,600,{inversionAttempts:true})
							if(code&&code?.data){
								callback(code.data)
								resultQr = ""
							}
						}
						
						
						
						
					}

				}
			})
		}

		bottomView.appendChild(photo)
		bottomView.appendChild(scan)

		parenView.appendChild(backText)
		parenView.appendChild(video)
		parenView.appendChild(bottomView)
		document.body.appendChild(parenView)
		
	
		
		const canvas = document.createElement('canvas');
		const ctx = canvas.getContext('2d')!;
		var constraints = {
			audio: false, 
			video: {
				width: 800, 
				height: 800,
				facingMode:"environment"
			}
		};
		navigator.mediaDevices.getUserMedia(constraints)
			.then(stream => {
				video.srcObject = stream;
				qre = stream
				video.play();
				var newWidth = 800;
				var newHeight =  newWidth*video.offsetWidth / video.offsetHeight;
				
				canvas.width = newWidth
				canvas.height = newHeight
				function readFrame() {
					ctx.clearRect(0,0,newWidth,newWidth)
					ctx.drawImage(video, 0, 0, newWidth, newHeight);
					const frameData = ctx.getImageData(0, 0, newWidth, newWidth);
					
					let code = Zxing(frameData.data,newWidth,newWidth,{inversionAttempts:true})
					if(code&&code?.data&&resultQr==''){
						resultQr = code.data
						callback(code.data)
						cancelAnimationFrame(cid)
						closeCamera()
					}
				
					cid = requestAnimationFrame(readFrame);
				}
				// 开始读取帧
				readFrame();
			})
			.catch(error => {
				console.error('Error accessing media devices:', error);
			});
			
		
		
		
		// navigator.mediaDevices.getUserMedia({ video: true })
		// 	.then(stream => {
		// 		video.srcObject = stream;
		// 		t.qre = stream
		// 		video.play();
		
		// 		// 设置 canvas 用于读取视频帧
		// 		const canvas = document.createElement('canvas');
		// 		canvas.style.width = video.offsetWidth + 'px'
		// 		canvas.style.height = video.offsetHeight + 'px'
		// 		canvas.width = video.offsetWidth
		// 		canvas.height = video.offsetHeight
		// 		const ctx = canvas.getContext('2d');
		// 		function readFrame() {
		// 			ctx.drawImage(video, 0, 0, canvas.width, canvas.height);
		// 			const frameData = ctx.getImageData(0, 0, canvas.width, canvas.height);
		
		// 			let p = new Zxing()
		// 			let qrd = new p()
		// 			qrd.callback = function (err, value) {
		// 				if (resultQr == '' && value?.result) {
		// 					resultQr = value.result
		// 					t.$emit("scan", [value.result])
		// 					cancelAnimationFrame(t.cid)
		// 				}
		// 			}
		// 			qrd.decode(frameData);
		// 			t.cid = requestAnimationFrame(readFrame);
		// 		}
		// 		// 开始读取帧
		// 		readFrame();
		// 	})
		// 	.catch(error => {
		// 		console.error('Error accessing media devices:', error);
		// 	});
		
		
		
		// qre = new QrScanner(
		// 	video,
		// 	function (result) {
		// 		console.log(result)
		// 		qre.stop()
		// 		video.pause();
		// 		resultQr = result;
		// 		callback(result)
		// 		closeCamera();
		// 		qre = null;
		// 	}
		// );
		// qre.start()
		setTimeout(function() {
			parenView.style.transform = 'scale(1)'
		}, 50);
	}
}