<template>
	<div class="canvasBox bg-[#333]">
		<template v-if="cmpData.isUse">
			<div class="box">
				<div class="line"></div>
				<div class="angle"></div>
			</div>
			<div class="box2" v-if="cmpData.isUseTorch">
				<div class="track" @click="openTrack">
					<svg t="1653920715959" class="icon" viewBox="0 0 1024 1024" version="1.1"
						xmlns="http://www.w3.org/2000/svg" p-id="1351" width="32" height="32">
						<path
							d="M651.353043 550.479503H378.752795L240.862609 364.315031c-3.688944-4.897391-5.660621-10.876025-5.660621-17.045466v-60.040745c0-15.773416 12.847702-28.621118 28.621118-28.621118h502.459627c15.773416 0 28.621118 12.847702 28.621118 28.621118v59.977143c0 6.105839-1.971677 12.084472-5.660621 17.045466l-137.890187 186.228074zM378.752795 598.308571v398.024348c0 15.328199 12.402484 27.667081 27.667081 27.667081h217.266087c15.328199 0 27.667081-12.402484 27.66708-27.667081V598.308571H378.752795z m136.300124 176.942112c-14.564969 0-26.331429-11.76646-26.331428-26.331428v-81.283975c0-14.564969 11.76646-26.331429 26.331428-26.331429 14.564969 0 26.331429 11.76646 26.331429 26.331429v81.283975c0 14.564969-11.76646 26.331429-26.331429 26.331428zM512 222.608696c-17.554286 0-31.801242-14.246957-31.801242-31.801243V31.801242c0-17.554286 14.246957-31.801242 31.801242-31.801242s31.801242 14.246957 31.801242 31.801242v159.006211c0 17.554286-14.246957 31.801242-31.801242 31.801243zM280.932174 205.881242c-9.47677 0-18.889938-4.197764-25.122981-12.275279L158.242981 67.991056a31.864845 31.864845 0 0 1 5.597019-44.648944 31.864845 31.864845 0 0 1 44.648944 5.597018l97.502609 125.551305a31.864845 31.864845 0 0 1-5.597019 44.648944c-5.787826 4.579379-12.656894 6.741863-19.46236 6.741863zM723.987081 205.881242c-6.805466 0-13.674534-2.162484-19.462361-6.678261a31.794882 31.794882 0 0 1-5.597018-44.648944l97.566211-125.551304a31.794882 31.794882 0 0 1 44.648944-5.597019 31.794882 31.794882 0 0 1 5.597019 44.648944l-97.566211 125.551305c-6.360248 8.077516-15.709814 12.27528-25.186584 12.275279z"
							fill="#ffffff" p-id="1352"></path>
					</svg>
					{{ cmpData.trackStatus ? $t('offFlash') : $t('onFlash') }}
				</div>
			</div>

			<div class="mask1 mask" :style="'height:' + cmpData.maskHeight + 'px;'"></div>
			<div class="mask2 mask" :style="
          'width:' +
          cmpData.maskWidth +
          'px;top:' +
          cmpData.maskHeight +
          'px;height:' +
          cmpData.canvasHeight +
          'px'
        "></div>
			<div class="mask3 mask" :style="'height:' + cmpData.maskHeight + 'px;'"></div>
			<div class="mask4 mask" :style="
          'width:' +
          cmpData.maskWidth +
          'px;top:' +
          cmpData.maskHeight +
          'px;height:' +
          cmpData.canvasHeight +
          'px'
        "></div>
		</template>
	</div>
</template>

<script setup lang="ts">
	import jsQR from 'jsqr'

	interface QrScanerProps {
		continue ?: boolean
		exact ?: string
		size ?: string
		definition ?: boolean
	}

	const props = withDefaults(defineProps<QrScanerProps>(), {
		continue: false,
		exact: 'environment',
		size: 'whole',
		definition: true,
	})

	const cmpData = reactive({
		windowWidth: 0,
		windowHeight: 0,
		video: null as HTMLVideoElement | null,
		canvas2d: null as CanvasRenderingContext2D | null,
		canvas2d2: null as CanvasRenderingContext2D | null,
		canvasWidth: 200,
		canvasHeight: 200,
		maskWidth: 0,
		maskHeight: 0,
		inter: 0,

		track: null as MediaStreamTrack | null,
		isUseTorch: false,
		trackStatus: false,

		isParse: false,
		isUse: true,
	})

	const openScan = () => {
		const videoParam = {
			audio: false,
			video: true,
			// video: {
			//     facingMode: { exact: props.exact },
			//     width,
			//     height
			// }
		}
		navigator.mediaDevices
			.getUserMedia(videoParam)
			.then((stream) => {
				cmpData.video = document.createElement('video')

				const canvas = document.createElement('canvas')
				canvas.id = 'canvas'
				canvas.width = transtion(cmpData.canvasWidth)
				canvas.height = transtion(cmpData.canvasHeight)
				// @ts-ignore
				canvas.style = 'position:absolute;top:0;'
				// canvas.style = 'display:none;'
				cmpData.canvas2d = canvas.getContext('2d')

				const canvasBox = document.querySelector('.canvasBox')
				canvasBox?.append(cmpData.video)
				canvasBox?.append(canvas)

				const canvas2 = document.createElement('canvas')
				canvas2.id = 'canvas2'
				canvas2.width = cmpData.canvasWidth
				canvas2.height = cmpData.canvasHeight
				// @ts-ignore
				canvas2.style =
					'position: absolute;top: 50%;left: 50%;z-index: 20;transform: translate(-50%, -50%);'
				cmpData.canvas2d2 = canvas2.getContext('2d')
				canvasBox?.append(canvas2)

				cmpData.video.srcObject = stream
				cmpData.video.setAttribute('playsinline', 'true')
				cmpData.video.play()
				tick()
				// @ts-ignore
				cmpData.track = stream.getVideoTracks()[0]
				setTimeout(() => {
					// @ts-ignore
					cmpData.isUseTorch = cmpData.track?.getCapabilities().torch || null
				}, 500)
			})
			.catch((err) => {
				console.log(err)

				cmpData.isUse = false
				// cmpData.$emit('error', err)
			})
	}

	const closeCamera = () => {
		cmpData.isParse = false
		if (cmpData.video && cmpData.video.srcObject) {
			// @ts-ignore
			cmpData.video.srcObject.getTracks().forEach((track) => {
				track.stop()
			})
		}
	}

	const tick = () => {
		if (!cmpData.isParse) return
		if (cmpData.video?.readyState === cmpData.video?.HAVE_ENOUGH_DATA) {
			cmpData.canvas2d?.drawImage(
				cmpData.video!,
				cmpData.maskWidth * 4.8,
				cmpData.maskHeight * 0.8,
				transtion(200),
				transtion(200),
				0,
				0,
				transtion(cmpData.canvasWidth),
				transtion(cmpData.canvasHeight),
			)

			const imageData = cmpData.canvas2d?.getImageData(
				0,
				0,
				transtion(cmpData.canvasWidth),
				transtion(cmpData.canvasHeight),
			)

			const code = jsQR(imageData!.data, imageData!.width, imageData!.height, {
				inversionAttempts: 'dontInvert',
			})

			cmpData.canvas2d2?.clearRect(0, 0, cmpData.canvasWidth, cmpData.canvasHeight)

			if (code) {
				drawLine(code.location.topLeftCorner, code.location.topRightCorner)
				drawLine(code.location.topRightCorner, code.location.bottomRightCorner)
				drawLine(code.location.bottomRightCorner, code.location.bottomLeftCorner)
				drawLine(code.location.bottomLeftCorner, code.location.topLeftCorner)
				if (code.data) {
					getData(code.data)
				}
			}
		}
		requestAnimationFrame(tick)
	}
	const drawLine = (begin : any, end : any, color = '#FF3B58') => {
		cmpData.canvas2d2!.beginPath()
		cmpData.canvas2d2!.moveTo(nutranstion(begin.x), nutranstion(begin.y))
		cmpData.canvas2d2!.lineTo(nutranstion(end.x), nutranstion(end.y))
		cmpData.canvas2d2!.lineWidth = 4
		cmpData.canvas2d2!.strokeStyle = color
		cmpData.canvas2d2!.stroke()
	}

	const getData = (data : any) => {
		// cmpData.$emit('success', data)
		console.log(data)

		if (!props.continue) {
			closeCamera()
		}
	}

	const openTrack = () => {
		cmpData.trackStatus = !cmpData.trackStatus
		cmpData.track?.applyConstraints({
			// @ts-ignore
			advanced: [{ torch: cmpData.trackStatus }],
		})
	}

	const createMsk = () => {
		cmpData.maskWidth = cmpData.windowWidth / 2 - cmpData.canvasWidth / 2
		cmpData.maskHeight = cmpData.windowHeight / 2 - cmpData.canvasHeight / 2
	}

	const transtion = (number : number) => {
		return props.definition ? number * 2.8 : number * 1.8
	}
	const nutranstion = (number : number) => {
		return props.definition ? number / 2.8 : number / 1.8
	}

	onMounted(() => {
		// if (origin.indexOf('https') === -1) throw

		cmpData.windowWidth =
			document.documentElement.clientWidth || document.body.clientWidth
		cmpData.windowHeight =
			document.documentElement.clientHeight || document.body.clientHeight
		cmpData.windowHeight =
			props.size === 'whole' ? cmpData.windowHeight : cmpData.windowHeight / 2
		cmpData.isParse = true

		nextTick(() => {
			createMsk()
			openScan()
		})
	})

	onUnmounted(() => {
		closeCamera()
	})
</script>

<style lang="scss" scoped>
	.canvasBox {
		width: 100vw;
		height: 100%;
		position: relative;

		background-image: linear-gradient(0deg,
				transparent 24%,
				rgba(32, 255, 77, 0.1) 25%,
				rgba(32, 255, 77, 0.1) 26%,
				transparent 27%,
				transparent 74%,
				rgba(32, 255, 77, 0.1) 75%,
				rgba(32, 255, 77, 0.1) 76%,
				transparent 77%,
				transparent),
			linear-gradient(90deg,
				transparent 24%,
				rgba(32, 255, 77, 0.1) 25%,
				rgba(32, 255, 77, 0.1) 26%,
				transparent 27%,
				transparent 74%,
				rgba(32, 255, 77, 0.1) 75%,
				rgba(32, 255, 77, 0.1) 76%,
				transparent 77%,
				transparent);
		background-size: 3rem 3rem;
		background-position: -1rem -1rem;
		z-index: 10;
		background-color: #1110;
	}

	.box {
		width: 200px;
		height: 200px;
		position: absolute;
		left: 50%;
		top: 50%;
		transform: translate(-50%, -50%);
		overflow: hidden;
		border: 0.1rem solid rgba(0, 255, 51, 0.2);
		z-index: 11;
	}

	.line {
		height: calc(100% - 2px);
		width: 100%;
		background: linear-gradient(180deg, rgba(0, 255, 51, 0) 43%, #00ff33 211%);
		border-bottom: 3px solid #00ff33;
		transform: translateY(-100%);
		animation: radar-beam 2s infinite alternate;
		animation-timing-function: cubic-bezier(0.53, 0, 0.43, 0.99);
		animation-delay: 1.4s;
	}

	.box:after,
	.box:before,
	.angle:after,
	.angle:before {
		content: '';
		display: block;
		position: absolute;
		width: 3vw;
		height: 3vw;
		z-index: 12;
		border: 0.2rem solid transparent;
	}

	.box:after,
	.box:before {
		top: 0;
		border-top-color: #00ff33;
	}

	.angle:after,
	.angle:before {
		bottom: 0;
		border-bottom-color: #00ff33;
	}

	.box:before,
	.angle:before {
		left: 0;
		border-left-color: #00ff33;
	}

	.box:after,
	.angle:after {
		right: 0;
		border-right-color: #00ff33;
	}

	@keyframes radar-beam {
		0% {
			transform: translateY(-100%);
		}

		100% {
			transform: translateY(0);
		}
	}

	.msg {
		text-align: center;
		padding: 20rpx 0;
	}

	.box2 {
		width: 300px;
		height: 200px;
		position: absolute;
		left: 50%;
		top: 50%;
		transform: translate(-50%, -50%);
		z-index: 20;
	}

	.track {
		position: absolute;
		bottom: -100px;
		left: 50%;
		transform: translateX(-50%);
		z-index: 20;
		color: #fff;
		display: flex;
		flex-direction: column;
		align-items: center;
	}

	.mask {
		position: absolute;
		z-index: 10;
		background-color: rgba(0, 0, 0, 0.55);
	}

	.mask1 {
		top: 0;
		left: 0;
		right: 0;
	}

	.mask2 {
		right: 0;
	}

	.mask3 {
		right: 0;
		left: 0;
		bottom: 0;
	}

	.mask4 {
		left: 0;
	}

	.error {
		color: #fff;
		padding: 40rpx;
		font-size: 24rpx;
		background-color: #333333;
		position: fixed;
		top: 50%;
		left: 50%;
		transform: translate(-50%, -50%);
		width: 550rpx;
		border-radius: 20rpx;
	}

	.error .on1 {
		font-size: 30rpx;
	}

	video {
		width: 100%;
		height: 100%;
	}
</style>