/* ===========================================================
 * ModalDialogForm.js v0.0.1
 * ===========================================================
 * Copyright 2016 Prevu
 * ========================================================== */

(function ($) {

	"use strict";
	/* ModalDialogForm CLASS DEFINITION
    * ====================== */

	var C_CHANGABLE_CONTROLS_SELECTOR = 'input[type=checkbox],input[type=radio],input[type=text],select,textarea';

	var ModalDialogForm = function (element, options) {
		this.init(element, options);
	};

	ModalDialogForm.prototype = {
		constructor: ModalDialogForm,
		init: function (element, options) {
			var plugin = this;
			this.options = options;
			this.$container = $(element);
			this.$data = {
				formDataChanged: false,
				formCloseEventHandler: null
			};

			this.validateIncomingParams();

			if (this.options.initCallback && (typeof this.options.initCallback === 'function')) {
				this.options.initCallback(this);
			}
		},
		validateIncomingParams: function () {
			// Add validation of incoming params here, if needed. Throw exception, if something is wrong
		},
		getContainerId: function () {
			if (!this.$container)
				return;

			return $(this.$container).attr('id');
		},
		attachToFormEvents: function () {
			var plugin = this;
			var containerId = this.getContainerId();
			if (!containerId) {
				throw "Unable to sign to modal form 'on close' event: container has no 'id' attribute";
			}

			if (!this.$data) {
				this.$data = {};
			}

			var containerSelector = '#' + containerId;
			this.$data.formCloseEventHandler = function (e) {
				return plugin.onFormClosingQuery(e, plugin);
			}

			$(document).on('hide.bs.modal', containerSelector, this.$data.formCloseEventHandler);
		},
		detachFromFormEvents: function () {
			if (this.$data && this.$data.formCloseEventHandler && (typeof this.$data.formCloseEventHandler === 'function')) {
				var containerId = this.getContainerId();
				if (!containerId) {
					throw "Unable to unasign from modal form 'on close' event: container has no 'id' attribute";
				}

				var containerSelector = '#' + containerId;
				$(document).off('hide.bs.modal', containerSelector, this.$data.formCloseEventHandler);
				this.$data.formCloseEventHandler = null;
			}
		},
		startTrackingControlChanges: function () {
			var plugin = this;
			$(this.$container).find(C_CHANGABLE_CONTROLS_SELECTOR).on("change.modalDialogForm", function () {
					plugin.setDataChanged(true);
			});
		},
		finishTrackingControlChanges: function () {
		    $(this.$container).find(C_CHANGABLE_CONTROLS_SELECTOR).off("change.modalDialogForm");
		},
		onFormClosingQuery: function (e, plugin) {

			var containerId = plugin.getContainerId();

			if ($(e.target).attr('id') != containerId) {
				plugin.$container.focus();
				return true; // close modal form
			}

            if (plugin.isDataChanged()) {
                bootbox.confirm(plugin.options.confirmMessage, function (result) {
                    if (result) {
                        plugin.resetDataChanges();
                        plugin.detachFromFormEvents();
                        plugin.finishTrackingControlChanges();
                        plugin.$container.modal('hide');
                    }
                });

				plugin.$container.focus();
				return false; // DO NOT close modal form
			}

			plugin.$container.focus();
			plugin.detachFromFormEvents();
			plugin.finishTrackingControlChanges();
			return true; // close modal form
		},
		setDataChanged: function (isChanged) {
			if (!this.$data) {
				this.$data = {};
			}
			this.$data.formDataChanged = isChanged;
		},
		resetDataChanges: function () {
			if (!this.$data) {
				this.$data = {};
			}
			this.$data.formDataChanged = false;
		},
		isDataChanged: function () {
			return this.$data ? this.$data.formDataChanged : false;
		},
		show: function () {
			this.startTrackingControlChanges();
			this.attachToFormEvents();
			this.resetDataChanges();
			this.$container.modal('show');
			if (this.options.parseValidators)
			    $.validator.unobtrusive.parseDynamicContent(this.$container.find('form'));
		},
		hide: function () {
			this.resetDataChanges();
			this.$container.modal('hide');
		},
		setData: function (data) {
			if (data) {
				this.$data = data;
			}
			else {
				this.$data = null;
			}
		},
		destroy: function () {
			console.log('Modal form destroy');
			var e = $.Event('destroy');
			this.$container.trigger(e);

			if (e.isDefaultPrevented()) return;

			this.detachFromFormEvents();
			this.$container.removeData('modalDialogForm');
		}
	};
	/* MODAL DIALOG FORM PLUGIN DEFINITION
    * ======================= */

	$.fn.modalDialogForm = function (option, args) {
		return this.each(function () {
			var $this = $(this),
                data = $this.data('modalDialogForm'),
                options = $.extend({}, $.fn.modalDialogForm.defaults, $this.data(), typeof option == 'object' && option);

			if (!data) $this.data('modalDialogForm', (data = new ModalDialogForm(this, options)));
			if (typeof option == 'string')
				data[option].apply(data, [].concat(args));
		});
	};

	$.fn.modalDialogForm.defaults = {
		confirmMessage: "Form contains data changes, do you really want to close the form?",
		initCallback: null,
        parseValidators: false
	};

	$.fn.modalDialogForm.Constructor = ModalDialogForm;

}(jQuery));