<template>
	<view class="uv-upload" :style="[$uv.addStyle(customStyle)]">
		<view class="uv-upload__wrap">
			<template v-if="previewImage">
				<view class="uv-upload__wrap__preview" v-for="(item, index) in lists" :key="index">
					<image 
						v-if="item.isImage || (item.type && item.type === 'image')" 
						:src="item.thumb || item.url" :mode="imageMode" 
						class="uv-upload__wrap__preview__image" 
						@tap="onPreviewImage(item,index)" 
						:style="[{
							width: $uv.addUnit(width),
							height: $uv.addUnit(height)
						}]" 
						/>
					<view 
						v-else 
						class="uv-upload__wrap__preview__other" 
						@tap="onPreviewVideo(item,index)" 
						:style="[{
							width: $uv.addUnit(width),
							height: $uv.addUnit(height)
						}]"
						>
						<uv-icon color="#80CBF9" size="26" :name="item.isVideo || (item.type && item.type === 'video') ? 'movie' : 'folder'"></uv-icon>
						<text class="uv-upload__wrap__preview__other__text">{{item.isVideo || (item.type && item.type === 'video') ? '视频' : '文件'}}</text>
					</view>
					<view class="uv-upload__status" v-if="item.status === 'uploading' || item.status === 'failed'">
						<view class="uv-upload__status__icon">
							<uv-icon v-if="item.status === 'failed'" name="close-circle" color="#ffffff" size="25" />
							<uv-loading-icon size="22" mode="circle" v-else />
						</view>
						<text v-if="item.message" class="uv-upload__status__message">{{ item.message }}</text>
					</view>
					<view class="uv-upload__deletable" v-if="item.status !== 'uploading' && (deletable || item.deletable)" @tap.stop="deleteItem(index)">
						<view class="uv-upload__deletable__icon">
							<uv-icon name="close" color="#ffffff" size="10"></uv-icon>
						</view>
					</view>
					<view class="uv-upload__success" v-if="item.status === 'success'">
						<!-- #ifdef APP-NVUE -->
						<image :src="successIcon" class="uv-upload__success__icon"></image>
						<!-- #endif -->
						<!-- #ifndef APP-NVUE -->
						<view class="uv-upload__success__icon">
							<uv-icon name="checkmark" color="#ffffff" size="12"></uv-icon>
						</view>
						<!-- #endif -->
					</view>
				</view>
			</template>
			<template v-if="isInCount">
				<view @tap="chooseFile">
					<slot>
						<view class="uv-upload__button" :hover-class="!disabled ? 'uv-upload__button--hover' : ''" hover-stay-time="150" @tap.stop="chooseFile" :class="[disabled && 'uv-upload__button--disabled']" :style="[{
								width: $uv.addUnit(width),
								height: $uv.addUnit(height)
							}]">
							<uv-icon :name="uploadIcon" size="26" :color="uploadIconColor"></uv-icon>
							<text v-if="uploadText" class="uv-upload__button__text">{{ uploadText }}</text>
						</view>
					</slot>
				</view>
			</template>
		</view>
		<uv-preview-video ref="previewVideo"></uv-preview-video>
	</view>
</template>

<script>
	import { func, image, video, array, promise } from '../../libs/function/test.js';
	import mpMixin from '../../libs/mixin/mpMixin.js'
	import mixin from '../../libs/mixin/mixin.js'
	import { chooseFile } from './utils';
	import mixin_accept from './mixin.js';
	import props from './props.js';
	/**
	 * upload 上传
	 * @description 该组件用于上传图片场景
	 * @tutorial https://www.uvui.cn/components/upload.html
	 * @property {String}			accept				接受的文件类型, 可选值为all media image file video （默认 'image' ）
	 * @property {String | Array}	capture				图片或视频拾取模式，当accept为image类型时设置capture可选额外camera可以直接调起摄像头（默认 ['album', 'camera'] ）
	 * @property {Boolean}			compressed			当accept为video时生效，是否压缩视频，默认为true（默认 true ）
	 * @property {String}			camera				当accept为video时生效，可选值为back或front（默认 'back' ）
	 * @property {Number}			maxDuration			当accept为video时生效，拍摄视频最长拍摄时间，单位秒（默认 60 ）
	 * @property {String}			uploadIcon			上传区域的图标，只能内置图标（默认 'camera-fill' ）
	 * @property {String}			uploadIconColor		上传区域的图标的字体颜色，只能内置图标（默认 #D3D4D6 ）
	 * @property {Boolean}			useBeforeRead		是否开启文件读取前事件（默认 false ）
	 * @property {Boolean}			previewFullImage	是否开启图片预览功能（默认 true ）
	 * @property {Boolean}			previewFullVideo	是否开启视频预览功能（默认 true ）
	 * @property {String | Number}	maxCount			最大上传数量（默认 52 ）
	 * @property {Boolean}			disabled			是否启用（默认 false ）
	 * @property {String}			imageMode			预览上传的图片时的裁剪模式，和image组件mode属性一致（默认 'aspectFill' ）
	 * @property {String}			name				标识符，可以在回调函数的第二项参数中获取
	 * @property {Array}			sizeType			所选的图片的尺寸, 可选值为original compressed（默认 ['original', 'compressed'] ）
	 * @property {Boolean}			multiple			是否开启图片多选，部分安卓机型不支持 （默认 false ）
	 * @property {Boolean}			deletable			是否展示删除按钮（默认 true ）
	 * @property {String | Number}	maxSize				文件大小限制，单位为byte （默认 Number.MAX_VALUE ）
	 * @property {Array}			fileList			显示已上传的文件列表
	 * @property {String}			uploadText			上传区域的提示文字
	 * @property {String | Number}	width				内部预览图片区域和选择图片按钮的区域宽度（默认 80 ）
	 * @property {String | Number}	height				内部预览图片区域和选择图片按钮的区域高度（默认 80 ）
	 * @property {Object}			customStyle			组件的样式，对象形式
	 * @event {Function} afterRead		读取后的处理函数
	 * @event {Function} beforeRead		读取前的处理函数
	 * @event {Function} oversize		文件超出大小限制
	 * @event {Function} clickPreview	点击预览时触发
	 * @event {Function} delete 		删除图片
	 * @example <uv-upload :action="action" :fileList="fileList" ></uv-upload>
	 */
	export default {
		name: "uv-upload",
		// #ifdef VUE3
		emits: ['error', 'beforeRead', 'oversize', 'afterRead', 'delete', 'clickPreview'],
		// #endif
		mixins: [mpMixin, mixin, mixin_accept, props],
		data() {
			return {
				// #ifdef APP-NVUE
				successIcon: 'data:image/png;base64,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',
				// #endif
				lists: [],
				isInCount: true,
			}
		},
		watch: {
			// 监听文件列表的变化，重新整理内部数据
			fileList: {
				deep: true,
				immediate: true,
				handler() {
					this.formatFileList()
				}
			},
			deletable(newVal) {
				if(!newVal) {
					this.lists.map(item=>{
						item.deletable = this.deletable;
					})
				}
			}
		},
		methods: {
			formatFileList() {
				const {
					fileList = [], maxCount
				} = this;
				const lists = fileList.map((item) =>
					Object.assign(Object.assign({}, item), {
						// 如果item.url为本地选择的blob文件的话，无法判断其为video还是image，此处优先通过accept做判断处理
						isImage: this.accept === 'image' || image(item.url || item.thumb),
						isVideo: this.accept === 'video' || video(item.url || item.thumb),
						deletable: typeof(item.deletable) === 'boolean' ? item.deletable : this.deletable,
					})
				);
				this.lists = lists
				this.isInCount = lists.length < maxCount
			},
			chooseFile() {
				this.timer && clearTimeout(this.timer);
				this.timer = setTimeout(() => {
					const {
						maxCount,
						multiple,
						lists,
						disabled
					} = this;
					if (disabled) return;
					// 如果用户传入的是字符串，需要格式化成数组
					let capture;
					try {
						capture = array(this.capture) ? this.capture : this.capture.split(',');
					} catch (e) {
						capture = [];
					}
					chooseFile(
							Object.assign({
								accept: this.accept,
								multiple: this.multiple,
								capture: capture,
								compressed: this.compressed,
								maxDuration: this.maxDuration,
								sizeType: this.sizeType,
								camera: this.camera,
							}, {
								maxCount: maxCount - lists.length,
							})
						)
						.then((res) => {
							this.onBeforeRead(multiple ? res : res[0]);
						})
						.catch((error) => {
							this.$emit('error', error);
						});
				}, 100)
			},
			// 文件读取之前
			onBeforeRead(file) {
				const {
					beforeRead,
					useBeforeRead,
				} = this;
				let res = true
				// beforeRead是否为一个方法
				if (func(beforeRead)) {
					// 如果用户定义了此方法，则去执行此方法，并传入读取的文件回调
					res = beforeRead(file, this.getDetail());
				}
				if (useBeforeRead) {
					res = new Promise((resolve, reject) => {
						this.$emit(
							'beforeRead',
							Object.assign(Object.assign({
								file
							}, this.getDetail()), {
								callback: (ok) => {
									ok ? resolve() : reject();
								},
							})
						);
					});
				}
				if (!res) {
					return;
				}
				if (promise(res)) {
					res.then((data) => this.onAfterRead(data || file));
				} else {
					this.onAfterRead(file);
				}
			},
			getDetail(index) {
				return {
					name: this.name,
					index: index == null ? this.fileList.length : index,
				};
			},
			onAfterRead(file) {
				const {
					maxSize,
					afterRead
				} = this;
				const oversize = Array.isArray(file) ?
					file.some((item) => item.size > maxSize) :
					file.size > maxSize;
				if (oversize) {
					this.$emit('oversize', Object.assign({
						file
					}, this.getDetail()));
					return;
				}
				if (typeof afterRead === 'function') {
					afterRead(file, this.getDetail());
				}
				this.$emit('afterRead', Object.assign({
					file
				}, this.getDetail()));
			},
			deleteItem(index) {
				this.$emit(
					'delete',
					Object.assign(Object.assign({}, this.getDetail(index)), {
						file: this.fileList[index],
					})
				);
			},
			// 预览图片
			onPreviewImage(item, index) {
				const lists = this.$uv.deepClone(this.lists);
				lists.map((i,j)=>{
					if(j == index) {
						i.current = true;
					}
				});
				const filters = lists.filter(i=>i.isImage);
				const findIndex = filters.findIndex(i=>i.current);
				this.onClickPreview(item, index);
				if (!item.isImage || !this.previewFullImage) return
				uni.previewImage({
					// 先filter找出为图片的item，再返回filter结果中的图片url
					urls: this.lists.filter((item) => this.accept === 'image' || image(item.url || item.thumb)).map((item) => item.url || item.thumb),
					current: findIndex,
					fail() {
						this.$uv.toast('预览图片失败')
					},
				});
			},
			onPreviewVideo(item, index) {
				this.onClickPreview(item, index);
				if (!this.previewFullVideo || !item.isVideo) return;
				this.$refs.previewVideo.open(item.url);
			},
			onClickPreview(item, index) {
				this.$emit(
					'clickPreview',
					Object.assign(Object.assign({}, item), this.getDetail(index))
				);
			}
		}
	}
</script>

<style lang="scss" scoped>
	@import '../../libs/css/components.scss';
	@import '../../libs/css/color.scss';
	$uv-upload-preview-border-radius: 2px !default;
	$uv-upload-preview-margin: 0 8px 8px 0 !default;
	$uv-upload-image-width: 80px !default;
	$uv-upload-image-height: $uv-upload-image-width;
	$uv-upload-other-bgColor: rgb(242, 242, 242) !default;
	$uv-upload-other-flex: 1 !default;
	$uv-upload-text-font-size: 11px !default;
	$uv-upload-text-color: $uv-tips-color !default;
	$uv-upload-text-margin-top: 2px !default;
	$uv-upload-deletable-right: 0 !default;
	$uv-upload-deletable-top: 0 !default;
	$uv-upload-deletable-bgColor: rgb(55, 55, 55) !default;
	$uv-upload-deletable-height: 14px !default;
	$uv-upload-deletable-width: $uv-upload-deletable-height;
	$uv-upload-deletable-boder-bottom-left-radius: 100px !default;
	$uv-upload-deletable-zIndex: 3 !default;
	$uv-upload-success-bottom: 0 !default;
	$uv-upload-success-right: 0 !default;
	$uv-upload-success-border-style: solid !default;
	$uv-upload-success-border-top-color: transparent !default;
	$uv-upload-success-border-left-color: transparent !default;
	$uv-upload-success-border-bottom-color: $uv-success !default;
	$uv-upload-success-border-right-color: $uv-upload-success-border-bottom-color;
	$uv-upload-success-border-width: 9px !default;
	$uv-upload-icon-top: 0px !default;
	$uv-upload-icon-right: 0px !default;
	$uv-upload-icon-h5-top: 1px !default;
	$uv-upload-icon-h5-right: 0 !default;
	$uv-upload-icon-width: 16px !default;
	$uv-upload-icon-height: $uv-upload-icon-width;
	$uv-upload-success-icon-bottom: -10px !default;
	$uv-upload-success-icon-right: -10px !default;
	$uv-upload-status-right: 0 !default;
	$uv-upload-status-left: 0 !default;
	$uv-upload-status-bottom: 0 !default;
	$uv-upload-status-top: 0 !default;
	$uv-upload-status-bgColor: rgba(0, 0, 0, 0.5) !default;
	$uv-upload-status-icon-Zindex: 1 !default;
	$uv-upload-message-font-size: 12px !default;
	$uv-upload-message-color: #FFFFFF !default;
	$uv-upload-message-margin-top: 5px !default;
	$uv-upload-button-width: 80px !default;
	$uv-upload-button-height: $uv-upload-button-width;
	$uv-upload-button-bgColor: rgb(244, 245, 247) !default;
	$uv-upload-button-border-radius: 2px !default;
	$uv-upload-botton-margin: 0 8px 8px 0 !default;
	$uv-upload-text-font-size: 11px !default;
	$uv-upload-text-color: $uv-tips-color !default;
	$uv-upload-text-margin-top: 2px !default;
	$uv-upload-hover-bgColor: rgb(230, 231, 233) !default;
	$uv-upload-disabled-opacity: .5 !default;
	.uv-upload {
		@include flex(column);
		flex: 1;
		&__wrap {
			@include flex;
			flex-wrap: wrap;
			flex: 1;
			&__preview {
				border-radius: $uv-upload-preview-border-radius;
				margin: $uv-upload-preview-margin;
				position: relative;
				overflow: hidden;
				@include flex;
				&__image {
					width: $uv-upload-image-width;
					height: $uv-upload-image-height;
				}
				&__other {
					width: $uv-upload-image-width;
					height: $uv-upload-image-height;
					background-color: $uv-upload-other-bgColor;
					flex: $uv-upload-other-flex;
					@include flex(column);
					justify-content: center;
					align-items: center;
					&__text {
						font-size: $uv-upload-text-font-size;
						color: $uv-upload-text-color;
						margin-top: $uv-upload-text-margin-top;
					}
				}
			}
		}
		&__deletable {
			position: absolute;
			top: $uv-upload-deletable-top;
			right: $uv-upload-deletable-right;
			background-color: $uv-upload-deletable-bgColor;
			height: $uv-upload-deletable-height;
			width: $uv-upload-deletable-width;
			@include flex;
			border-bottom-left-radius: $uv-upload-deletable-boder-bottom-left-radius;
			align-items: center;
			justify-content: center;
			z-index: $uv-upload-deletable-zIndex;
			&__icon {
				position: absolute;
				transform: scale(0.7);
				top: $uv-upload-icon-top;
				right: $uv-upload-icon-right;
				/* #ifdef H5 */
				top: $uv-upload-icon-h5-top;
				right: $uv-upload-icon-h5-right;
				/* #endif */
			}
		}
		&__success {
			position: absolute;
			bottom: $uv-upload-success-bottom;
			right: $uv-upload-success-right;
			@include flex;
			// 由于weex(nvue)为阿里巴巴的KPI(部门业绩考核)的laji产物，不支持css绘制三角形
			// 所以在nvue下使用图片，非nvue下使用css实现
			/* #ifndef APP-NVUE */
			border-style: $uv-upload-success-border-style;
			border-top-color: $uv-upload-success-border-top-color;
			border-left-color: $uv-upload-success-border-left-color;
			border-bottom-color: $uv-upload-success-border-bottom-color;
			border-right-color: $uv-upload-success-border-right-color;
			border-width: $uv-upload-success-border-width;
			align-items: center;
			justify-content: center;
			/* #endif */
			&__icon {
				/* #ifndef APP-NVUE */
				position: absolute;
				transform: scale(0.7);
				bottom: $uv-upload-success-icon-bottom;
				right: $uv-upload-success-icon-right;
				/* #endif */
				/* #ifdef APP-NVUE */
				width: $uv-upload-icon-width;
				height: $uv-upload-icon-height;
				/* #endif */
			}
		}
		&__status {
			position: absolute;
			top: $uv-upload-status-top;
			bottom: $uv-upload-status-bottom;
			left: $uv-upload-status-left;
			right: $uv-upload-status-right;
			background-color: $uv-upload-status-bgColor;
			@include flex(column);
			align-items: center;
			justify-content: center;
			&__icon {
				position: relative;
				z-index: $uv-upload-status-icon-Zindex;
			}
			&__message {
				font-size: $uv-upload-message-font-size;
				color: $uv-upload-message-color;
				margin-top: $uv-upload-message-margin-top;
			}
		}
		&__button {
			@include flex(column);
			align-items: center;
			justify-content: center;
			width: $uv-upload-button-width;
			height: $uv-upload-button-height;
			background-color: $uv-upload-button-bgColor;
			border-radius: $uv-upload-button-border-radius;
			margin: $uv-upload-botton-margin;
			/* #ifndef APP-NVUE */
			box-sizing: border-box;
			/* #endif */
			&__text {
				font-size: $uv-upload-text-font-size;
				color: $uv-upload-text-color;
				margin-top: $uv-upload-text-margin-top;
			}
			&--hover {
				background-color: $uv-upload-hover-bgColor;
			}
			&--disabled {
				opacity: $uv-upload-disabled-opacity;
			}
		}
	}
</style>