class Http {
	//头部文件
	header = {}
	//远程地址
	baseUrl = ""
	params = {}
	//函数存放口
	baseCall = {
		before: [], //请求之前
		after: [], //请求之后
		success: [], //请求成功
		fail: [], //请求失败
		complete: [] ,//请求完毕
		_intercept:null,//拦截器专用
	}
	//传递格式
	type = "json"
	//监听器
	interceptors = {
		//请求之前
		before: (call) =>  {
			this.baseCall.before.push(call);
		},
		//请求之后
		after: (call) => {
			this.baseCall.after.push(call);
		},
		//请求成功
		success: (call) => {
			this.baseCall.success.push(call);
		},
		//请求失败
		fail: (call) =>  {
			this.baseCall.fail.push(call);
		},
		//请求完毕
		complete: (call) => {
			this.baseCall.complete.push(call);
		},
		//被拦截
		_intercept:(call)=>{
			this.baseCall._intercept = call;
		}
	};
	constructor() {

	}
	
	setParams(key,value) {
		this.params[key] = value;
	}
	
	/**
	 * get提交
	 * @param {Object} url
	 * @param {Object} post
	 */
	get(url, post) {
		this.baseUrl = url;
		this.params = post || {_t:new Date().getTime()};
		this.buld('get');
	}
	/** 
	 * post提交
	 * @param {Object} url
	 * @param {Object} post
	 */
	post(url, post) {
		this.baseUrl = url;
		this.setHeader('content-type', "application/x-www-form-urlencoded");
		this.params = post;
		this.buld('post');
	}
	/**
	 * 上传文件
	 * @param {Object} url
	 * @param {Object} post
	 */
	uploadFile(url,post,img,name) {
		this.baseUrl = url;
		this.params = post;
		this.upFile(img,name);
	}
	/**
	 * 提交数据
	 */
	buld(method) {
		//提交之前
		for (var i in this.baseCall.before) {
			var b = this.baseCall.before[i].call(this);
			//进行拦截
			if(b != null && b === false) {
				this.intercept();
				return;
			}
		}
		uni.request({
			url: this.baseUrl,
			method: method,
			data: this.params,
			header: this.header,
			dataType: this.type,
			success: res => {	
				//提交之后
				for (var i in this.baseCall.after) {
					var b = this.baseCall.after[i].call(this,res);
					//进行拦截
					if(b != null && b === false) {
						this.intercept();
						return;
					}
				}
				if (res.statusCode == 200) {
					for (var i in this.baseCall.success) {
						this.baseCall.success[i].call(this,res.data);
					}
				} else {
					for (var i in this.baseCall.fail) {
						this.baseCall.fail[i].call(this,res.data);
					}
				}
			},
			fail: (res) => {
				/**
				uni.showModal({
					title:"错误提示",
					content:JSON.stringify(res)
				});
				console.log(res); **/
				for (var i in this.baseCall.fail) {
					this.baseCall.fail[i].call(this,res.errMsg);
				}
			},
			complete: (res) => {
				if(res.errMsg == 'request:ok') {
					for (var i in this.baseCall.complete) {
						this.baseCall.complete[i].call(this,res);
					}
				} else {
					console.log(res);
					for (var i in this.baseCall.fail) {
						this.baseCall.fail[i].call(this,res.errMsg);
					}
				}
				
			}
		});
	}
	
	upFile(img,name) {
		var that = this;
		//提交之前
		for (var i in this.baseCall.before) {
			var b = this.baseCall.before[i].call(this);
			//进行拦截
			if(b != null && b === false) {
				this.intercept();
				return;
			}
		}
		uni.uploadFile({
			url : this.baseUrl,
			filePath : img,
			name : name,
			formData: this.params,
			header:this.header,
			success : (res)=>{
				try{
					res = JSON.parse(res.data);
					
					for (var i in this.baseCall.success) {
						this.baseCall.success[i].call(this,res);
					}
				}catch(e) {
					for (var i in this.baseCall.fail) {
						this.baseCall.fail[i].call(this,e);
					}
				}
			}	
		});
	}
	
	/**
	 * 提交头部数据
	 * @param {Object} key
	 * @param {Object} value
	 */
	setHeader(key, value) {
		this.header[key] = value;
		return this;
	}
	/**
	 * 设置类型
	 * @param {Object} type
	 */
	setType(type) {
		this.type = type;
	}
	/**
	 * 告诉监听者，被拦截了，可以进行反应操作
	 */
	intercept() {
		if(this.baseCall._intercept != null) {
			this.baseCall._intercept.call(this);
		}
	}
};

export default Http;