/*******************************************************************************
 * IBM Confidential
 * 
 * OCO Source Materials
 * 
 * A and PM: PD
 * 
 * (c) Copyright IBM Corp. 2014, 2015
 * 
 * The source code for this program is not published or otherwise divested of
 * its trade secrets, irrespective of what has been deposited with the U.S.
 * Copyright Office.
 ******************************************************************************/

define([
	"dojo/_base/declare",
	"dojo/_base/lang",
	"dojo/_base/array",
	"dojox/form/uploader/plugins/HTML5"
],function(declare, lang, array, dojoHTML5){
	var HTML5 = declare("pd/widgets/uploader/HTML5", [dojoHTML5], {
		
		upload: function(data){
			var isEdit = data['inSpec'] != null;
			
			this.onBegin(this.getFileList());
			this.uploadWithFormData(data, !isEdit);
		},
		
		uploadWithFormData: function(data, isGovernorCheck){
			//overwrite dojo original one.
			var formData = new FormData();
			
			if (data) {

				for(var key in data) {
					formData.append(key, data[key]);
				}
				
				data.uploadType = this.uploadType;
			}
		
			if (isGovernorCheck) {
				this._filesTMP = this._files;
			} else if (this._filesTMP) {
				this._files = this._filesTMP;
			}
			
			array.some(this._files, function(file){
				formData.append(this.name, isGovernorCheck ? '' : file);
				return true; //only add the 1st file
			}, this);
			
			var xhr = this.createXhr(data, isGovernorCheck);
			if (dojo.isSafari && xhr.overrideMimeType) {
				xhr.overrideMimeType('text/xml');
			}
			xhr.send(formData);
		},
		
		createXhr: function(data, isGovernorCheck){
			//overwrite dojo original one.
			var xhr = new XMLHttpRequest();
			var timer;
			if (!isGovernorCheck) {
				xhr.upload.addEventListener("progress", lang.hitch(this, "_xhrProgress"), false);
			}
			xhr.addEventListener("load", lang.hitch(this, "_xhrProgress"), false);
			xhr.addEventListener("error", lang.hitch(this, function(evt){
				this.onError(evt);
				clearInterval(timer);
			}), false);
			xhr.addEventListener("abort", lang.hitch(this, function(evt){
				this.onAbort(evt);
				clearInterval(timer);
			}), false);
			xhr.onreadystatechange = lang.hitch(this, function(){
				if(xhr.readyState === 4){
					clearInterval(timer);
					try{
						var result = "";
						if (this.handleAs.toLowerCase() == "json"){
							result = JSON.parse(xhr.responseText.replace(/^\{\}&&/,''));
						} else if (this.handleAs.toLowerCase() == "xml"){
							result = xhr.responseXML;
						} else if (this.handleAs.toLowerCase() == "html"){
							result = xhr.response;
						} else {
							result = xhr.responseText;
						}
						
						if (xhr.status == 200) {
							if (isGovernorCheck) {
								var valid = this.onComplete(result, true);
								if (valid) {
									this.uploadWithFormData(data, false);
								}
							} else {
								this.onComplete(result);
							}
						} else {
							this.onError({
								name: xhr.status,
								message: xhr.status + " " + xhr.statusText,
								response: result	//use response as the payload
							});
						}
					} catch(err){
						this.onError(err);
					}
				} else {
					console.log(xhr);
				}
			});
			
			xhr.open("POST", this.getUrl());
			xhr.setRequestHeader("Accept","application/" + this.handleAs);
			
			var responseType = "";
			if (this.handleAs.toLowerCase() == "json"){
				responseType = "json";
			} else if (this.handleAs.toLowerCase() == "html"){
				responseType = dojo.isSafari?"text":"document";
			} 
			xhr.responseType = responseType;
			
			timer = setInterval(lang.hitch(this, function(){
				try{
					if(typeof(xhr.statusText)){}
				}catch(e){
					clearInterval(timer);
				}
			}),250);
	
			return xhr;
		}
	});
	
	return HTML5;
});