var EXPO = EXPO || {}; //isolated namespace

// module requires JQuery library, dna.js template engine (http://dnajs.org/)
// protection against duplication of a module code
if (EXPO.placePhoto){
	console.warn('WARNING: EXPO.placePhoto is already defined!');
}else{

	EXPO.placePhoto = (function() {
	// variables
		var that = {};
		that.settings = {

		}; //default module setting
		that.lang ={};
	//dependence's

	//private
		// constructor for popup window on gallery page
		var ModalBox = function(modalId, containerId, modalTrigger, ajaxUrl, nextButtonId, prevButtonId, closeModalButtonId, modalContainerId){
			// object properties
			var self = this;
			this.currentId = undefined;
			this.ajaxUrl = location.protocol+'//'+location.hostname+(location.port ? ':'+location.port: '') + ajaxUrl;
			//modal Window options
			this.opt = {
				gContainerId:containerId,
				mId:modalId,
				mTrigger:modalTrigger,
				nBtn: nextButtonId,
				pBtn: prevButtonId,
				cBtn: closeModalButtonId,
				mcId: modalContainerId
			};
			this.$mWindow = undefined;

			$(function () {
				self.$mWindow = $('#'+self.opt.mId);
				self.$mtrigger = $('.'+self.opt.mTrigger);
				self.$nBtn = $('#'+self.opt.nBtn);
				self.$pBtn = $('#'+self.opt.pBtn);
				self.$cBtn = $('#'+self.opt.cBtn);
				self.$mtrigger.on('click', function () {
					var curId;

					try {
						curId = $(this).children('img').data('image-id');
						self.currentId = curId;
					}
					catch(err) {
						console.log(err.message);
					}
					self.show();
					return false;
				});
				// next button
				self.$nBtn.off('click');
				self.$nBtn.on('click', function () {
					self.nextSlide();
					return false;

				});
				// previous button
				self.$pBtn.off('click');
				self.$pBtn.on('click', function () {
					self.prevSlide();
					return false;
				});
				//close modal window
				self.$cBtn.off('click');
				self.$cBtn.on('click', function () {
					self.close();
					return false;
				});
				self.$mWindow .off('click');
				self.$mWindow .on('click', function (event) {
					var targetObj = $(event.target);
					if (targetObj.parents().filter('#'+self.opt.mcId).length < 1) {
						self.close();
					}
					return false;
				});
			});

		};
		//methods for ModalBox object
		ModalBox.prototype = {
			//some kin
			_getAjax: function (dataToSend, handler) {
				var self = this;
				if(!dataToSend){
					dataToSend = '';
				}
				$.ajax({
					type: 'GET',
					url: self.ajaxUrl,
					data:dataToSend,
					success: function(data) {
						if(typeof handler == 'function'){
							self.rawData =  data;
							handler();
						} else{
							self.rawData =  data;
						}
					}
				});
			},
			// require dna.js template engine
			_renderSlide: function (idToRender, handler) {
				var self = this;
				if(idToRender){
					self.currentId = idToRender;
				}
				if(handler){
					dna.empty(self.opt.mcId);
					dna.load(self.opt.mcId, (self.ajaxUrl + self.currentId + '/'),{ callback:handler()});
				}else{

					dna.empty(self.opt.mcId);
					dna.load(self.opt.mcId, (self.ajaxUrl + self.currentId + '/'),{empty:true});
				}

			},
			_getId: function (parameter) {
				var self = this,
					nextSlide = function () {
						var curId = $('.'+self.opt.mTrigger+' [data-image-id="'+self.currentId+'"]').parents('li').next().find('img').data('image-id');
						if(curId){
							self.currentId = curId;
						}else{
							console.log('there is not next slides');

						}
					},
					prevSlide = function () {
						var curId = $('.'+self.opt.mTrigger+' [data-image-id="'+self.currentId+'"]').parents('li').prev().find('img').data('image-id');
						if(curId){
							self.currentId = curId;
						}else{
							console.log('there is not previous slides');

						}
					},
					defaultAction = function () {
						console.log('_getId('+parameter+') RESULTS:');
						console.log(self.currentId);

					};
				switch(parameter) {
					case '>':
						nextSlide();
						break;
					case '<':
						prevSlide();
						break;
					default:
					defaultAction();
				}
			},
			//public methods
			close: function () {
				$('body').removeClass('no-scroll');
				this.$mWindow.hide();
			},
			open: function () {
				$('body').addClass('no-scroll');
				this.$mWindow.show();
			},
			nextSlide:function () {
				var pastSlide = this.currentId;
				this._getId('>');

				if(pastSlide != this.currentId){
					this._renderSlide();
				}
			},
			prevSlide: function () {
				var pastSlide = this.currentId;
				this._getId('<');
				if(pastSlide != this.currentId){
					this._renderSlide();
				}
			},
			// method to get sliderPopup visible and pass to modalBox first initial id and make some init routine
			show: function (idToShow) {
				var self = this;
				this._renderSlide(idToShow, function () {self.open()});
			}
		};
	// methods
		//инициализация общих свойств
		that.init = function(options) {
			// settings extending
			$.extend(this.lang, options.lang);
			options.lang = null;
			$.extend(this.settings, options);
			// begin of initialization
			var self = this;

			this.modal  = new ModalBox(self.settings.modalId, self.settings.containerId, self.settings.modalTrigger, self.settings.ajaxUrl, self.settings.nextButtonId, self.settings.prevButtonId, self.settings.closeModalButtonId, self.settings.modalContainerId);
		};
		return that;
	}());
}