<template>
	<view v-show="show" class="t-wrapper" @touchmove.stop.prevent="moveHandle">
		<view class="t-mask" :class="{active:active}" @click.stop="close"></view>
		<view class="t-box" :class="{active:active}">
			<view class="t-header">
				<view class="t-header-button" @click="close">取消</view>
				<view class="t-header-button" @click="confirm">确认</view>
			</view>
			<view class="t-color__box" :style="{ background: 'rgb(' + bgcolor.r + ',' + bgcolor.g + ',' + bgcolor.b + ')'}">
				<view class="t-background boxs" @touchstart="touchstart($event, 0)" @touchmove="touchmove($event, 0)" @touchend="touchend($event, 0)">
					<view class="t-color-mask"></view>
					<view class="t-pointer" :style="{ top: site[0].top - 8 + 'px', left: site[0].left - 8 + 'px' }"></view>
				</view>
			</view>
			<view class="t-control__box">
				<view class="t-control__color">
					<view class="t-control__color-content" :style="{ background: 'rgba(' + rgba.r + ',' + rgba.g + ',' + rgba.b + ',' + rgba.a + ')' }"></view>
				</view>
				<view class="t-control-box__item">
					<view class="t-controller boxs" @touchstart="touchstart($event, 1)" @touchmove="touchmove($event, 1)" @touchend="touchend($event, 1)">
						<view class="t-hue">
							<view class="t-circle" :style="{ left: site[1].left - 12 + 'px' }"></view>
						</view>
					</view>
					<view class="t-controller boxs" @touchstart="touchstart($event, 2)" @touchmove="touchmove($event, 2)" @touchend="touchend($event, 2)">
						<view class="t-transparency">
							<view class="t-circle" :style="{ left: site[2].left - 12 + 'px' }"></view>
						</view>
					</view>
				</view>
			</view>
			<view class="t-result__box">
				<view v-if="mode" class="t-result__item">
					<view class="t-result__box-input">{{hex}}</view>
					<view class="t-result__box-text">HEX</view>
				</view>
				<template v-else>
					<view class="t-result__item">
						<view class="t-result__box-input">{{rgba.r}}</view>
						<view class="t-result__box-text">R</view>
					</view>
					<view class="t-result__item">
						<view class="t-result__box-input">{{rgba.g}}</view>
						<view class="t-result__box-text">G</view>
					</view>
					<view class="t-result__item">
						<view class="t-result__box-input">{{rgba.b}}</view>
						<view class="t-result__box-text">B</view>
					</view>
					<view class="t-result__item">
						<view class="t-result__box-input">{{rgba.a}}</view>
						<view class="t-result__box-text">A</view>
					</view>
				</template>

				<view class="t-result__item t-select" @click="select">
					<view class="t-result__box-input">
						<view>切换</view>
						<view>模式</view>
					</view>
				</view>
			</view>
			<view class="t-alternative">
				<view class="t-alternative__item" v-for="(item,index) in colorList" :key="index">
					<view class="t-alternative__item-content" :style="{ background: 'rgba(' + item.r + ',' + item.g + ',' + item.b + ',' + item.a + ')' }"
					 @click="selectColor(item)">
					</view>
				</view>
			</view>
		</view>
	</view>
</template>

<script>
	export default {
		props: {
			color: {
				type: Object,
				default () {
					return {
						r: 0,
						g: 0,
						b: 0,
						a: 0
					}
				}
			},
			spareColor: {
				type: Array,
				default () {
					return []
				}
			}
		},
		data() {
			return {
				show: false,
				active: false,
				// rgba 颜色
				rgba: {
					r: 0,
					g: 0,
					b: 0,
					a: 1
				},
				// hsb 颜色
				hsb: {
					h: 0,
					s: 0,
					b: 0
				},
				site: [{
					top: 0,
					left: 0
				}, {
					left: 0
				}, {
					left: 0
				}],
				index: 0,
				bgcolor: {
					r: 255,
					g: 0,
					b: 0,
					a: 1
				},
				hex: '#000000',
				mode: true,
				colorList: [{
					r: 244,
					g: 67,
					b: 54,
					a: 1
				}, {
					r: 233,
					g: 30,
					b: 99,
					a: 1
				}, {
					r: 156,
					g: 39,
					b: 176,
					a: 1
				}, {
					r: 103,
					g: 58,
					b: 183,
					a: 1
				}, {
					r: 63,
					g: 81,
					b: 181,
					a: 1
				}, {
					r: 33,
					g: 150,
					b: 243,
					a: 1
				}, {
					r: 3,
					g: 169,
					b: 244,
					a: 1
				}, {
					r: 0,
					g: 188,
					b: 212,
					a: 1
				}, {
					r: 0,
					g: 150,
					b: 136,
					a: 1
				}, {
					r: 76,
					g: 175,
					b: 80,
					a: 1
				}, {
					r: 139,
					g: 195,
					b: 74,
					a: 1
				}, {
					r: 205,
					g: 220,
					b: 57,
					a: 1
				}, {
					r: 255,
					g: 235,
					b: 59,
					a: 1
				}, {
					r: 255,
					g: 193,
					b: 7,
					a: 1
				}, {
					r: 255,
					g: 152,
					b: 0,
					a: 1
				}, {
					r: 255,
					g: 87,
					b: 34,
					a: 1
				}, {
					r: 121,
					g: 85,
					b: 72,
					a: 1
				}, {
					r: 158,
					g: 158,
					b: 158,
					a: 1
				}, {
					r: 0,
					g: 0,
					b: 0,
					a: 0.5
				}, {
					r: 0,
					g: 0,
					b: 0,
					a: 0
				}, ]
			};
		},
		created() {
			this.rgba = this.color;
			if (this.spareColor.length !== 0) {
				this.colorList = this.spareColor;
			}
		},
		methods: {
			/**
			 * 初始化
			 */
			init() {
				// hsb 颜色
				this.hsb = this.rgbToHex(this.rgba);
				// this.setColor();
				this.setValue(this.rgba);
			},
			moveHandle() {},
			open() {
				uni.hideKeyboard();
				this.show = true;
				this.$nextTick(() => {
					this.init();
					setTimeout(() => {
						this.active = true;
						setTimeout(() => {
							this.getSelectorQuery();
						}, 350)
					}, 50)
				})

			},
			close() {
				this.active = false;
				this.$nextTick(() => {
					setTimeout(() => {
						this.show = false;
					}, 500)
				});
				this.$emit('cancel', {});
			},
			confirm() {
				this.close();
				this.$emit('confirm', {
					rgba: this.rgba,
					hex: this.hex
				});
			},
			// 选择模式
			select() {
				this.mode = !this.mode
			},
			// 常用颜色选择
			selectColor(item) {
				this.setColorBySelect(item)
			},
			touchstart(e, index) {
				const {
					pageX,
					pageY
				} = e.touches[0];
				this.pageX = pageX;
				this.pageY = pageY;
				this.setPosition(pageX, pageY, index);
			},
			touchmove(e, index) {
				const {
					pageX,
					pageY
				} = e.touches[0];
				this.moveX = pageX;
				this.moveY = pageY;
				this.setPosition(pageX, pageY, index);
			},
			touchend(e, index) {},
			/**
			 * 设置位置
			 */
			setPosition(x, y, index) {
				this.index = index;
				const {
					top,
					left,
					width,
					height
				} = this.position[index];
				// 设置最大最小值

				this.site[index].left = Math.max(0, Math.min(parseInt(x - left), width));
				if (index === 0) {
					this.site[index].top = Math.max(0, Math.min(parseInt(y - top), height));
					// 设置颜色
					this.hsb.s = parseInt((100 * this.site[index].left) / width);
					this.hsb.b = parseInt(100 - (100 * this.site[index].top) / height);
					this.setColor();
					this.setValue(this.rgba);
				} else {
					this.setControl(index, this.site[index].left);
				}
			},
			/**
			 * 设置 rgb 颜色
			 */
			setColor() {
				const rgb = this.HSBToRGB(this.hsb);
				this.rgba.r = rgb.r;
				this.rgba.g = rgb.g;
				this.rgba.b = rgb.b;
			},
			/**
			 * 设置二进制颜色
			 * @param {Object} rgb
			 */
			setValue(rgb) {
				this.hex = '#' + this.rgbToHex(rgb);
			},
			setControl(index, x) {
				const {
					top,
					left,
					width,
					height
				} = this.position[index];

				if (index === 1) {
					this.hsb.h = parseInt((360 * x) / width);
					this.bgcolor = this.HSBToRGB({
						h: this.hsb.h,
						s: 100,
						b: 100
					});
					this.setColor()
				} else {
					this.rgba.a = (x / width).toFixed(1);
				}
				this.setValue(this.rgba);
			},
			/**
			 * rgb 转 二进制 hex
			 * @param {Object} rgb
			 */
			rgbToHex(rgb) {
				let hex = [rgb.r.toString(16), rgb.g.toString(16), rgb.b.toString(16)];
				hex.map(function(str, i) {
					if (str.length == 1) {
						hex[i] = '0' + str;
					}
				});
				return hex.join('');
			},
			setColorBySelect(getrgb) {
				const {
					r,
					g,
					b,
					a
				} = getrgb;
				let rgb = {}
				rgb = {
					r: r ? parseInt(r) : 0,
					g: g ? parseInt(g) : 0,
					b: b ? parseInt(b) : 0,
					a: a ? a : 0,
				};
				this.rgba = rgb;
				this.hsb = this.rgbToHsb(rgb);
				this.changeViewByHsb();
			},
			changeViewByHsb() {
				const [a, b, c] = this.position;
				this.site[0].left = parseInt(this.hsb.s * a.width / 100);
				this.site[0].top = parseInt((100 - this.hsb.b) * a.height / 100);
				this.setColor(this.hsb.h);
				this.setValue(this.rgba);
				this.bgcolor = this.HSBToRGB({
					h: this.hsb.h,
					s: 100,
					b: 100
				});

				this.site[1].left = this.hsb.h / 360 * b.width;
				this.site[2].left = this.rgba.a * c.width;

			},
			/**
			 * hsb 转 rgb
			 * @param {Object} 颜色模式  H(hues)表示色相，S(saturation)表示饱和度，B（brightness）表示亮度
			 */
			HSBToRGB(hsb) {
				let rgb = {};
				let h = Math.round(hsb.h);
				let s = Math.round((hsb.s * 255) / 100);
				let v = Math.round((hsb.b * 255) / 100);
				if (s == 0) {
					rgb.r = rgb.g = rgb.b = v;
				} else {
					let t1 = v;
					let t2 = ((255 - s) * v) / 255;
					let t3 = ((t1 - t2) * (h % 60)) / 60;
					if (h == 360) h = 0;
					if (h < 60) {
						rgb.r = t1;
						rgb.b = t2;
						rgb.g = t2 + t3;
					} else if (h < 120) {
						rgb.g = t1;
						rgb.b = t2;
						rgb.r = t1 - t3;
					} else if (h < 180) {
						rgb.g = t1;
						rgb.r = t2;
						rgb.b = t2 + t3;
					} else if (h < 240) {
						rgb.b = t1;
						rgb.r = t2;
						rgb.g = t1 - t3;
					} else if (h < 300) {
						rgb.b = t1;
						rgb.g = t2;
						rgb.r = t2 + t3;
					} else if (h < 360) {
						rgb.r = t1;
						rgb.g = t2;
						rgb.b = t1 - t3;
					} else {
						rgb.r = 0;
						rgb.g = 0;
						rgb.b = 0;
					}
				}
				return {
					r: Math.round(rgb.r),
					g: Math.round(rgb.g),
					b: Math.round(rgb.b)
				};
			},
			rgbToHsb(rgb) {
				let hsb = {
					h: 0,
					s: 0,
					b: 0
				};
				let min = Math.min(rgb.r, rgb.g, rgb.b);
				let max = Math.max(rgb.r, rgb.g, rgb.b);
				let delta = max - min;
				hsb.b = max;
				hsb.s = max != 0 ? 255 * delta / max : 0;
				if (hsb.s != 0) {
					if (rgb.r == max) hsb.h = (rgb.g - rgb.b) / delta;
					else if (rgb.g == max) hsb.h = 2 + (rgb.b - rgb.r) / delta;
					else hsb.h = 4 + (rgb.r - rgb.g) / delta;
				} else hsb.h = -1;
				hsb.h *= 60;
				if (hsb.h < 0) hsb.h = 0;
				hsb.s *= 100 / 255;
				hsb.b *= 100 / 255;
				return hsb;
			},
			getSelectorQuery() {
				const views = uni.createSelectorQuery().in(this);
				views
					.selectAll('.boxs')
					.boundingClientRect(data => {
						if (!data || data.length === 0) {
							setTimeout(() => this.getSelectorQuery(), 20)
							return
						}
						this.position = data;
						// this.site[0].top = data[0].height;
						// this.site[0].left = 0;
						// this.site[1].left = data[1].width;
						// this.site[2].left = data[2].width;
						this.setColorBySelect(this.rgba);
					})
					.exec();
			}
		},
		watch: {
			spareColor(newVal) {
				this.colorList = newVal;
			}
		}
	};
</script>

<style>
	.t-wrapper {
		position: fixed;
		top: 0;
		bottom: 0;
		left: 0;
		width: 100%;
		box-sizing: border-box;
		z-index: 9999;
	}

	.t-box {
		width: 100%;
		position: absolute;
		bottom: 0;
		padding: 30upx 0;
		padding-top: 0;
		background: #fff;
		transition: all 0.3s;
		transform: translateY(100%);
	}

	.t-box.active {
		transform: translateY(0%);
	}

	.t-header {
		display: flex;
		justify-content: space-between;
		width: 100%;
		height: 100upx;
		border-bottom: 1px #eee solid;
		box-shadow: 1px 0 2px rgba(0, 0, 0, 0.1);
		background: #fff;
	}

	.t-header-button {
		display: flex;
		align-items: center;
		width: 150upx;
		height: 100upx;
		font-size: 30upx;
		color: #666;
		padding-left: 20upx;
	}

	.t-header-button:last-child {
		justify-content: flex-end;
		padding-right: 20upx;
	}

	.t-mask {
		position: absolute;
		top: 0;
		left: 0;
		right: 0;
		bottom: 0;
		background: rgba(0, 0, 0, 0.6);
		z-index: -1;
		transition: all 0.3s;
		opacity: 0;
	}

	.t-mask.active {
		opacity: 1;
	}

	.t-color__box {
		position: relative;
		height: 400upx;
		background: rgb(255, 0, 0);
		overflow: hidden;
		box-sizing: border-box;
		margin: 0 20upx;
		margin-top: 20upx;
		box-sizing: border-box;
	}

	.t-background {
		position: absolute;
		top: 0;
		left: 0;
		right: 0;
		bottom: 0;
		background: linear-gradient(to right, #fff, rgba(255, 255, 255, 0));
	}

	.t-color-mask {
		position: absolute;
		top: 0;
		left: 0;
		right: 0;
		bottom: 0;
		width: 100%;
		height: 400upx;
		background: linear-gradient(to top, #000, rgba(0, 0, 0, 0));
	}

	.t-pointer {
		position: absolute;
		bottom: -8px;
		left: -8px;
		z-index: 2;
		width: 15px;
		height: 15px;
		border: 1px #fff solid;
		border-radius: 50%;
	}

	.t-show-color {
		width: 100upx;
		height: 50upx;
	}

	.t-control__box {
		margin-top: 50upx;
		width: 100%;
		display: flex;
		padding-left: 20upx;
		box-sizing: border-box;
	}

	.t-control__color {
		flex-shrink: 0;
		width: 100upx;
		height: 100upx;
		border-radius: 50%;
		background-color: #fff;
		background-image: linear-gradient(45deg, #eee 25%, transparent 25%, transparent 75%, #eee 75%, #eee),
			linear-gradient(45deg, #eee 25%, transparent 25%, transparent 75%, #eee 75%, #eee);
		background-size: 36upx 36upx;
		background-position: 0 0, 18upx 18upx;
		border: 1px #eee solid;
		overflow: hidden;
	}

	.t-control__color-content {
		width: 100%;
		height: 100%;
	}

	.t-control-box__item {
		display: flex;
		flex-direction: column;
		justify-content: space-between;
		width: 100%;
		padding: 0 30upx;
	}

	.t-controller {
		position: relative;
		width: 100%;
		height: 16px;
		background-color: #fff;
		background-image: linear-gradient(45deg, #eee 25%, transparent 25%, transparent 75%, #eee 75%, #eee),
			linear-gradient(45deg, #eee 25%, transparent 25%, transparent 75%, #eee 75%, #eee);
		background-size: 32upx 32upx;
		background-position: 0 0, 16upx 16upx;
	}

	.t-hue {
		width: 100%;
		height: 100%;
		background: linear-gradient(to right, #f00 0%, #ff0 17%, #0f0 33%, #0ff 50%, #00f 67%, #f0f 83%, #f00 100%);
	}

	.t-transparency {
		width: 100%;
		height: 100%;
		background: linear-gradient(to right, rgba(0, 0, 0, 0) 0%, rgb(0, 0, 0));
	}

	.t-circle {
		position: absolute;
		/* right: -10px; */
		top: -2px;
		width: 20px;
		height: 20px;
		box-sizing: border-box;
		border-radius: 50%;
		background: #fff;
		box-shadow: 0 0 2px 1px rgba(0, 0, 0, 0.1);
	}

	.t-result__box {
		margin-top: 20upx;
		padding: 10upx;
		width: 100%;
		display: flex;
		box-sizing: border-box;
	}

	.t-result__item {
		display: flex;
		flex-direction: column;
		align-items: center;
		justify-content: center;
		padding: 10upx;
		width: 100%;
		box-sizing: border-box;
	}

	.t-result__box-input {
		padding: 10upx 0;
		width: 100%;
		font-size: 28upx;
		box-shadow: 0 0 1px 1px rgba(0, 0, 0, 0.1);
		color: #999;
		text-align: center;
		background: #fff;
	}

	.t-result__box-text {
		margin-top: 10upx;
		font-size: 28upx;
		line-height: 2;
	}

	.t-select {
		flex-shrink: 0;
		width: 150upx;
		padding: 0 30upx;
	}

	.t-select .t-result__box-input {
		border-radius: 10upx;
		border: none;
		color: #999;
		box-shadow: 1px 1px 2px 1px rgba(0, 0, 0, 0.1);
		background: #fff;
	}

	.t-select .t-result__box-input:active {
		box-shadow: 0px 0px 1px 0px rgba(0, 0, 0, 0.1);
	}

	.t-alternative {
		display: flex;
		flex-wrap: wrap;
		/* justify-content: space-between; */
		width: 100%;
		padding-right: 10upx;
		box-sizing: border-box;
	}

	.t-alternative__item {
		margin-left: 12upx;
		margin-top: 10upx;
		width: 50upx;
		height: 50upx;
		border-radius: 10upx;
		background-color: #fff;
		background-image: linear-gradient(45deg, #eee 25%, transparent 25%, transparent 75%, #eee 75%, #eee),
			linear-gradient(45deg, #eee 25%, transparent 25%, transparent 75%, #eee 75%, #eee);
		background-size: 36upx 36upx;
		background-position: 0 0, 18upx 18upx;
		border: 1px #eee solid;
		overflow: hidden;
	}

	.t-alternative__item-content {
		width: 50upx;
		height: 50upx;
		background: rgba(255, 0, 0, 0.5);
	}

	.t-alternative__item:active {
		transition: all 0.3s;
		transform: scale(1.1);
	}
</style>
