<template>
	<view>
		<page-head :title="title"></page-head>
		<view class="uni-common-mt">
			<form>

				<view class="uni-list list-pd">
					<view class="uni-list-cell cell-pd">
						<view class="uni-uploader">
							<view class="uni-uploader-head">
								<view class="uni-uploader-title">选择照片</view>
								<view class="uni-uploader-info">{{imageList.length}}</view>
							</view>
							<view class="uni-uploader-body">
								<view class="uni-uploader__files">
									<block v-for="(image,index) in imageList" :key="index">
										<view class="uni-uploader__file">
											<image class="uni-uploader__img" :src="image" :data-src="image" @tap="previewImage"></image>
										</view>
									</block>
									<view class="uni-uploader__input-box">
										<view class="uni-uploader__input" @tap="chooseImage"></view>
									</view>
								</view>
							</view>
						</view>
					</view>
				</view>


				<view class="uni-list list-pd">
					<view class="uni-list-cell cell-pd">
						<view class="uni-uploader">
							<view class="uni-uploader-head">
								<view class="uni-uploader-title">水印编辑</view>
							</view>
							<view class="uni-uploader-body">
								<canvas canvas-id="canvas" class="canvas" :start="startStatus" :change:start="canvasStart"
								    :data-width="canvasWidth" :data-height="canvasWidth"></canvas>
							</view>
						</view>
					</view>

					<!-- <view class="uni-list-cell">
						<view class="uni-list-cell-left">
							<view class="uni-label">图片质量</view>
						</view>
						<view class="uni-list-cell-right">
							<picker :range="sizeType" @change="sizeTypeChange" :value="sizeTypeIndex" mode="selector">
								<view class="uni-input">{{sizeType[sizeTypeIndex]}}</view>
							</picker>
						</view>
					</view>

					<view class="uni-list-cell">
						<view class="uni-list-cell-left">
							<view class="uni-label">数量限制</view>
						</view>
						<view class="uni-list-cell-right">
							<picker :range="count" @change="countChange" mode="selector">
								<view class="uni-input">{{count[countIndex]}}</view>
							</picker>
						</view>
					</view> -->
				</view>
			</form>
		</view>
	</view>
</template>
<script>
	import permision from "@/common/permission.js"
	var sourceType = [
		['camera'],
		['album'],
		['camera', 'album']
	]
	var sizeType = [
		['compressed'],
		['original'],
		['compressed', 'original']
	]
	export default {
		data() {
			return {
				title: 'choose/previewImage',
				imageList: [],
				sourceTypeIndex: 2,
				sourceType: ['拍照', '相册', '拍照或相册'],
				sizeTypeIndex: 2,
				sizeType: ['压缩', '原图', '压缩或原图'],
				countIndex: 8,
				count: [1, 2, 3, 4, 5, 6, 7, 8, 9],

				// canvas
                canvasWidth: 0,
                startStatus: false,
			}
		},
		onReady: function() {
		    this.$nextTick(() => {
		        uni.createSelectorQuery().select(".canvas").boundingClientRect(data => {
		            this.canvasWidth = data.width
		            // #ifdef APP-PLUS || H5
		            this.startStatus = true
		            // #endif
		            // #ifndef APP-PLUS || H5
		            ctx = uni.createCanvasContext('canvas')
		            this.drawBall()
		            // #endif
		        }).exec()
		    })
		},
		onUnload() {
			this.imageList = [],
				this.sourceTypeIndex = 2,
				this.sourceType = ['拍照', '相册', '拍照或相册'],
				this.sizeTypeIndex = 2,
				this.sizeType = ['压缩', '原图', '压缩或原图'],
				this.countIndex = 8;
		},
		methods: {
			canvasStart(newVal, oldVal, owner, ins) {
				let canvasWidth = ins.getDataset().width,
				    canvasHeight = ins.getDataset().height,
				    canvasEle = document.querySelectorAll('.canvas>canvas')[0],
				    ctx = canvasEle.getContext('2d')
				ctx.fillStyle = "#FF0000"
				console.log("111")
			},
			sourceTypeChange: function(e) {
				this.sourceTypeIndex = parseInt(e.detail.value)
			},
			sizeTypeChange: function(e) {
				this.sizeTypeIndex = parseInt(e.detail.value)
			},
			countChange: function(e) {
				this.countIndex = e.detail.value;
			},
			chooseImage: async function() {
				// #ifdef APP-PLUS
				// TODO 选择相机或相册时 需要弹出actionsheet，目前无法获得是相机还是相册，在失败回调中处理
				if (this.sourceTypeIndex !== 2) {
					let status = await this.checkPermission();
					if (status !== 1) {
						return;
					}
				}
				// #endif

				if (this.imageList.length === 9) {
					let isContinue = await this.isFullImg();
					console.log("是否继续?", isContinue);
					if (!isContinue) {
						return;
					}
				}
				uni.chooseImage({
					sourceType: sourceType[this.sourceTypeIndex],
					sizeType: sizeType[this.sizeTypeIndex],
					count: this.imageList.length + this.count[this.countIndex] > 9 ? 9 - this.imageList.length : this.count[this.countIndex],
					success: (res) => {
						this.imageList = this.imageList.concat(res.tempFilePaths);
					},
					fail: (err) => {
						// #ifdef APP-PLUS
						if (err['code'] && err.code !== 0 && this.sourceTypeIndex === 2) {
							this.checkPermission(err.code);
						}
						// #endif
						// #ifdef MP
						uni.getSetting({
							success: (res) => {
								let authStatus = false;
								switch (this.sourceTypeIndex) {
									case 0:
										authStatus = res.authSetting['scope.camera'];
										break;
									case 1:
										authStatus = res.authSetting['scope.album'];
										break;
									case 2:
										authStatus = res.authSetting['scope.album'] && res.authSetting['scope.camera'];
										break;
									default:
										break;
								}
								if (!authStatus) {
									uni.showModal({
										title: '授权失败',
										content: 'Hello uni-app需要从您的相机或相册获取图片，请在设置界面打开相关权限',
										success: (res) => {
											if (res.confirm) {
												uni.openSetting()
											}
										}
									})
								}
							}
						})
						// #endif
					}
				})
			},
			isFullImg: function() {
				return new Promise((res) => {
					uni.showModal({
						content: "已经有9张图片了,是否清空现有图片？",
						success: (e) => {
							if (e.confirm) {
								this.imageList = [];
								res(true);
							} else {
								res(false)
							}
						},
						fail: () => {
							res(false)
						}
					})
				})
			},
			previewImage: function(e) {
				var current = e.target.dataset.src
				uni.previewImage({
					current: current,
					urls: this.imageList
				})
			},
			async checkPermission(code) {
				let type = code ? code - 1 : this.sourceTypeIndex;
				let status = permision.isIOS ? await permision.requestIOS(sourceType[type][0]) :
					await permision.requestAndroid(type === 0 ? 'android.permission.CAMERA' :
						'android.permission.READ_EXTERNAL_STORAGE');

				if (status === null || status === 1) {
					status = 1;
				} else {
					uni.showModal({
						content: "没有开启权限",
						confirmText: "设置",
						success: function(res) {
							if (res.confirm) {
								permision.gotoAppSetting();
							}
						}
					})
				}

				return status;
			}
		}
	}
</script>

<style>
	.cell-pd {
		padding: 22rpx 30rpx;
	}

	.list-pd {
		margin-top: 50rpx;
	}
</style>
