<template>
	<view class='t-toptips' :style="{top: top,background: cubgColor}" :class="[show?'t-top-show':'']">
		<view v-if="loading" class="flex flex-sub">
			<view class="cu-progress flex-sub round striped active sm">
				<view :style="{ background: color,width: value + '%'}"></view>
			</view>
			<text class="margin-left">{{value}}%</text>
		</view>
		<block v-else>{{msg}}</block>
		
	</view>
</template>

<script>
export default {
	props: {
		top: {
			type: String,
			default: 'auto'
		},
		bgColor: {
			type: String,
			default: 'rgba(49, 126, 243, 0.5)',
		},
		color: {
			type: String,
			default: '#e54d42',
		}
	},
	data() {
		return {
			cubgColor: '',
			loading: false,
			value: 5,
			show: false,
			msg: '执行完毕~',
		}
	},
	methods: {
		toast(title = '',{ duration = 2000, icon = 'none'} = {}) {
			uni.showToast({title,duration,icon});
		},
		getRequest(url) {  
			let theRequest = new Object(); 
			let index = url.indexOf("?");
			if (index != -1) {  
				let str = url.substring(index+1);  
				let strs = str.split("&");  
				for(let i = 0; i < strs.length; i ++) {  
					theRequest[strs[i].split("=")[0]]=unescape(strs[i].split("=")[1]);  
				} 
			}  
			return theRequest;  
		},
		
		/*
			上传说明：
			currentWebview: 当前窗口webview对象
			url：上传接口地址
			name：上传文件key值
			header: 上传接口请求头
			...：body内其他参数
		*/
		appChooseFile({currentWebview,url,name = 'file',header,...formData} = {}) {
			// #ifdef APP-PLUS
				let wv = plus.webview.create("","/hybrid/html/index.html",{
					'uni-app': 'none', //不加载uni-app渲染层框架，避免样式冲突
					top: 0,
					height: '100%',
					background: 'transparent'
				},{
					url,
					header,
					formData,
					key: name,
				});
				wv.loadURL("/hybrid/html/index.html")
				currentWebview.append(wv);
				wv.overrideUrlLoading({mode:'reject'},(e)=>{
					let {fileName,id} = this.getRequest(e.url);
					fileName = unescape(fileName);
					id = unescape(id);
					return this.onCommit(
					this.$emit('up-success',{fileName,data: {id,statusCode: 200}})
					);
				});
			// #endif
		},
		wxChooseFile({url,name = 'file',header,...formData} = {}) {
			wx.chooseMessageFile({
				count: 1,
				type: 'file',
				success: ({tempFiles}) => {
					let [{path:filePath,name:fileName}] = tempFiles;
					this.setdefUI();
					
					return uni.uploadFile({
						url,
						name,
						filePath,
						formData,
						header,
						success: (res) => {
							if (res.statusCode==200) {
								let data = JSON.parse(res.data);
								
								//可自行添加后台返回状态验证
								return this.onCommit(this.$emit('up-success',{fileName,data}));
							}
							return this.errorHandler('文件上传失败',this.upErr);
						},
						fail: () => this.errorHandler('文件上传失败',this.upErr)
					});
				},
				fail: () => this.errorHandler('文件选择失败',this.upErr)
			})
		},
		/* 
		上传
		*/
		upload(param = {}) {
			
			if (!param.url) {
				this.toast('上传地址不正确');
				return;
			}
			
			if (this.loading) {
				this.toast('还有个文件玩命处理中，请稍候..');
				return;
			}
			
			
			// #ifdef APP-PLUS
				return this.appChooseFile(param);
				
			// #endif
			
			// #ifdef MP-WEIXIN
				return this.wxChooseFile(param);
			// #endif
		},
		/* 
		打开文件 
		*/
		open(filePath) {
			let system = uni.getSystemInfoSync().platform;
			if(system == 'ios'){
				filePath = encodeURI(filePath);
			}
			uni.openDocument({
				filePath,
				success: (res) => {console.log('打开文档成功');}
			});
		},
		/* 
		下载
		 type: temporary=返回临时地址，local=长期保存到本地
		 */
		download(url,type = 'temporary') {
			if (this.loading) {
				this.toast('还有个文件玩命处理中，请稍候..');
				return;
			}
			this.setdefUI();
			
			return new Promise((resolve,reject)=>{
				let downloadTask = uni.downloadFile({
				    url,
				    success: ({statusCode,tempFilePath}) => {
				        if (statusCode === 200) {
							if (type == 'local') {
								uni.saveFile({
									tempFilePath,
									success:({savedFilePath}) => this.onCommit(resolve(savedFilePath)),
									fail: () => this.errorHandler('下载失败',reject)
								});
							}
							else {
								this.onCommit(resolve(tempFilePath))
							}
						}
					},
					fail: () => this.errorHandler('下载失败',reject)
				});
				
				downloadTask.onProgressUpdate(({progress = 0}) => {
					if (progress <= 100) {
						this.$nextTick(()=>{
							this.value = progress;
						});
					}
				});
			})
			
		},
		
		onCommit(resolve) {
			this.msg = '执行完毕~';
			this.loading = false;
			this.cubgColor = 'rgba(57, 181, 74, 0.5)';
			setTimeout(()=>{this.show = false;},1500);
			return resolve;
		},
		
		setdefUI() {
			this.cubgColor = this.bgColor;
			this.value = 0;
			this.loading = true;
			this.show = true;
		},
		
		upErr(errText) {
			this.$emit('up-error',errText);
		},
		
		errorHandler(errText,reject) {
			this.msg = errText;
			this.loading = false;
			this.cubgColor = 'rgba(229, 77, 66, 0.5)';
			setTimeout(()=>{this.show = false;},1500);
			return reject(errText);
		}
	}
}
</script>

<style scoped>
	.t-toptips {
		width: 100%;
		padding: 18upx 30upx;
		box-sizing: border-box;
		position: fixed;
		z-index: 90;
		color: #fff;
		font-size: 30upx;
		left: 0;
		display: flex;
		align-items: center;
		justify-content: center;
		word-break: break-all;
		opacity: 0;
		transform: translateZ(0) translateY(-100%);
		transition: all 0.3s ease-in-out;
	}
	
	.t-top-show {
		transform: translateZ(0) translateY(0);
		opacity: 1;
	}
	
</style>