/*
 * Copyright (C) 2013-2023 Combodo SARL
 *
 * This file is part of iTop.
 *
 * iTop is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * iTop is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 */

//iTop Portal Form handler
//This extends itop.form_handler
;
$(function()
{
	// the widget definition, where 'itop.portal' is the namespace,
	// 'form_handler' the widget name
	$.widget( 'itop.portal_form_handler', $.itop.form_handler,
	{
		options: {
			base_url: null,     // Base URL of the application
			submit_url: null,   // Deprecated. We kept those properties to preserve compatibility with extensions
			cancel_url: null,   // but you should start using xxx_rule.url as soon as possible.
			submit_rule: {
				category: 'redirect',
				url: null,
				modal: false,
				timeout_duration: 400,
			},
			cancel_rule: {
				category: 'close',
				url: null,
				modal: false,
			},
		},
		
		// the constructor
		_create: function()
		{
			this.element.addClass('portal_form_handler');
	
			// Safe check for options
			if(this.options.submit_rule.url === '')
				this.options.submit_rule.url = null;
			if(this.options.cancel_rule.url === '')
				this.options.cancel_rule.url = null;
			// Deprecated, see this.options.submit_url
			if((this.options.submit_url !== null) && (this.options.submit_url !== ''))
				this.options.submit_rule.url = this.options.submit_url;
			if((this.options.cancel_url !== null) && (this.options.cancel_url !== ''))
				this.options.cancel_rule.url = this.options.cancel_url;

			this._bindEvents();

			this._super();
		},
   
		// events bound via _bind are removed automatically
		// revert other modifications here
		_destroy: function()
		{
			this.element
			.removeClass('portal_form_handler');
		},
		// _setOptions is called with a hash of all options that are changing
		// always refresh when changing options
		_setOptions: function()
		{
			this._superApply(arguments);
		},
		// _setOption is called for each individual option that is changing
		_setOption: function( key, value )
		{
			this._super( key, value );
		},
		_bindEvents: function() {
			const me = this;

			// Submit event from the form should be treated as a click on the submit button
			// as it processes things before sending the request
			this.element.on('submit', function(oEvent) {
				// N°6500 Abort if event doesn't come from this form
				// eg. Extensions like "approval-base" add a sub (HTML) form in the buttons sections of this (conceptual) form, which can cause the submit of that sub form to be catched here first and therefore go to unexpected behavior.
				if (oEvent.target !== oEvent.currentTarget) {
					return;
				}

				me._onSubmitClick(oEvent);
			});
		},

		// - Callback when some fields have been touched
		_onFieldsTouched: function(oEvent)
		{
			this._super(oEvent);
			this._registerBlockers();
		},
		// Overload from parent class
		_onSubmitClick: function(oEvent)
		{
			oEvent.preventDefault();
			var me = this;

			// EasterEgg : Vibrate on submit
			if(window.navigator.vibrate)
			{
				window.navigator.vibrate(200);
			}

			// Validating fields prior to post (Client side)
			var bIsValid = me.options.field_set.triggerHandler('validate');
			// Retrieving stimulus name
			var sStimulusCode = null;
			if($(oEvent.currentTarget).attr('name') === 'stimulus_code')
			{
				sStimulusCode = $(oEvent.currentTarget).val();
			}

			// Submit form
			if(bIsValid)
			{
				me._disableFormBeforeLoading();
				$.post(
					me.options.endpoint,
					{
						operation: 'submit',
						stimulus_code: sStimulusCode,
						transaction_id: me.options.formmanager_data.transaction_id,
						formmanager_class: me.options.formmanager_class,
						formmanager_data: JSON.stringify(me.options.formmanager_data),
						current_values: me.getCurrentValues(),
						attachment_ids: me.getAttachmentIds()
					},
					function(oData){
						if(oData.form.validation !== undefined)
						{   
							var oValidation = oData.form.validation;
							
							// First we build the form
							me.options.field_set.field_set('option', 'fields_list', oData.form.fieldset.fields_list);
							me.options.field_set.field_set('option', 'is_valid', oValidation.valid);
							me.options.field_set.field_set('buildForm');

							// Then only we display messages from the server, otherwise they will be cleared by the HTML print
							var oMessages = oValidation.messages;

							// Cleaning help blocks
							me.element.find('.form_alerts').removeClass('has-success has-warning has-error');
							me.element.find('.form_alerts .alert').html('').hide();
							me.element.find('.form_field').removeClass('has-success has-warning has-error');
							me.element.find('.form_field .help-block').html('');

							// Determine where we go in case validation is successful
							var sRuleType = me.options.submit_rule.category;
							var bRedirectInModal = me.options.submit_rule.modal;
							var iRedirectTimeout = me.options.submit_rule.timeout_duration;
							var sRedirectUrl = me.options.submit_rule.url;
							// - The validation might want us to be redirect elsewhere
							if(oValidation.valid)
							{
								// Checking if we have to redirect to another page
								// Typically this happens when applying a stimulus, we redirect to the transition form
								// This code let the ajax response override the initial parameters
								if(oValidation.redirection !== undefined)
								{
									var oRedirection = oValidation.redirection;
									if(oRedirection.modal !== undefined)
									{
										bRedirectInModal = oRedirection.modal;
									}
									if(oRedirection.url !== undefined)
									{
										sRedirectUrl = oRedirection.url;
									}
									if(oRedirection.timeout_duration !== undefined)
									{
										iRedirectTimeout = oRedirection.timeout_duration;
									}
									sRuleType = 'redirect';
								}
							}

							// For each type of messages (error, warning, success)...
							for(var sMessageType in oMessages)
							{
								var sMessageClass = 'has-' + sMessageType;  
								// ... for each concerned fields ...
								for(var sFieldId in oMessages[sMessageType])
								{
									var oField = me.options.field_set.field_set('getField', sFieldId);
									var oHelpBlock = null;

									// Checking if the messages are for a field or for the whole form
									if(oField.length === 1)
									{
										oField.addClass(sMessageClass);
										oHelpBlock = oField.find('.help-block');
									}
									else
									{
										// Success messages are displayed out of the form as it will be closed
										if(sMessageType === 'success')
										{
											// If not redirecting in a modal, will be set as session message
											if((sRuleType === 'redirect') && (bRedirectInModal === false) && (sRedirectUrl !== null))
											{
												oHelpBlock = null;
											}
											// Otherwise, display it in main page
											else
											{
												oHelpBlock = $('#session-messages');
											}
										}
										// Warning and error messages are displayed in the form
										else
										{
											oHelpBlock = me.element.find('.form_alerts .alert.alert-' + sMessageType);
											oHelpBlock.show();
										}
									}
									// ... add the message to its help block
									for(var i in oMessages[sMessageType][sFieldId])
									{
										var sMessageContent = oMessages[sMessageType][sFieldId][i];
										if(oHelpBlock === null)
										{
											$.post(
												// Note: We might want to expose some routes directly in JS to ease their use
												GetAddSessionMessageUrl(),
												{
													sSeverity: sMessageType,
													sContent: sMessageContent,
												}
											);
										}
										else if(oHelpBlock.attr('id') === 'session-messages')
										{
											oHelpBlock.append($('<div class="alert alert-dismissible alert-' + sMessageType + '" data-object-class="' + oData.form.object_class + '" data-object-id="' + oData.form.object_id + '"><button type="button" class="close" data-dismiss="alert" aria-label="X"><span class="fas fa-times"></span></button>' + sMessageContent + '</div>'));
										}
										else
										{
											oHelpBlock.append($('<p>' + sMessageContent + '</p>'));
										}
									}
								}
							}

							// Scrolling to top so the user can see messages
							$('body').scrollTop(0);
						
							// If everything is okay, we close the form and apply the submit rule.
							if(oValidation.valid)
							{
								me._unregisterBlockers();

								// Checking if we have to redirect to another page
								if(sRuleType === 'redirect')
								{
									me._applyRedirectRule(sRedirectUrl, bRedirectInModal, iRedirectTimeout);
								}
								// Close rule only needs to be applied to non modal forms (modal is always closed on submit)
								else if(sRuleType === 'close')
								{
									me._applyCloseRule();
								}
							}
						}
					}
				)
				.fail(function(oData){
					me._onUpdateFailure(oData);
				})
				.always(function(){
					me._enableFormAfterLoading();
				});
			}
			// Else go to the first invalid field
			else
			{
				// EasterEgg : Vibrate on submit
				if(window.navigator.vibrate)
				{
					window.navigator.vibrate([200, 100, 200]);
				}
				this.element.find('.has-error')[0].scrollIntoView();
			}
		},
		// Overload from parent class
		_onCancelClick: function(oEvent)
		{
			oEvent.preventDefault();
			oEvent.stopPropagation();
			
			var me = this;

			// When fields have been modified, we have to ask them to cancel stuff if necessary
			if(me.options.field_set.field_set('option', 'touched_fields').length > 0)
			{
				me._disableFormBeforeLoading();
				me._unregisterBlockers();
				$.post(
					me.options.endpoint,
					{
						operation: 'cancel',
						formmanager_class: me.options.formmanager_class,
						formmanager_data: JSON.stringify(me.options.formmanager_data),
						current_values: me.getCurrentValues()
					},
					function(oData)
					{
						if(me.options.cancel_rule.category === 'redirect')
						{
							me._applyRedirectRule(me.options.cancel_rule.url, me.options.cancel_rule.modal);
						}
						else if(me.options.cancel_rule.category === 'close')
						{
							me._applyCloseRule();
						}
					}
				)
				.always(function()
				{
					me._enableFormAfterLoading();
				});
			}
			// Otherwise we can close the modal immediately
			else
			{
				if(me.options.cancel_rule.category === 'redirect')
				{
					me._applyRedirectRule(me.options.cancel_rule.url, me.options.cancel_rule.modal);
				}
				else if(me.options.cancel_rule.category === 'close')
				{
					me._applyCloseRule();
				}
			}
		},
		// Overload from parent class
		_onUpdateFailure: function(oData)
		{
			if(oData.responseJSON !== undefined && oData.responseJSON !== null)
			{
				var oResponse = oData.responseJSON;
				// If we encounter an error
				if(oResponse.exception !== undefined)
				{
					// Note : This could be refactored for a global use
					var oModalElem = $('#modal-for-alert');
					oModalElem.find('.modal-title').html(oResponse.error_title);
					oModalElem.find('.modal-body .alert').html(oResponse.error_message)
							.removeClass('alert-success alert-info alert-warning alert-danger')
							.addClass('alert-danger');
					oModalElem.modal('show');
				}
			}
		},
		// Overload from parent class
		_onUpdateAlways: function(oData, sFormPath)
		{
			// Check all touched AFTER ajax is complete, otherwise the renderer will redraw the field in the mean time.
			this.element.find('.form_fields').trigger('validate', {touched_fields_only: true});
			this._enableFormAfterLoading();
		},
		// Place a field for which no container exists
		_addField: function(sFieldId)
		{
			$('<div ' + this.options.field_identifier_attr + '="'+sFieldId+'"></div>').appendTo(this.element.find('.form_fields'));
		},
		_disableFormBeforeLoading: function()
		{
			$('#page_overlay').fadeIn(200);
		},
		_enableFormAfterLoading: function()
		{
			$('#page_overlay').fadeOut(200);
		},
		_applyRedirectRule: function(sRedirectUrl, bRedirectInModal, iRedirectTimeout)
		{
			var me = this;

			//optional argument
			iRedirectTimeout = (typeof iRedirectTimeout !== 'undefined' && iRedirectTimeout != null ) ? iRedirectTimeout : 400;

			// Always close current modal
			if(this.options.is_modal)
			{
				this.element.closest('.modal').modal('hide');
			}

			if(sRedirectUrl !== null)
			{
				if(bRedirectInModal === true)
				{
					// Creating a new modal
					CombodoModal.OpenModal({
						content: {
							endpoint: sRedirectUrl,
							data: {
								// Passing form manager data to the next page, just in case it needs it (eg. when applying stimulus)
								formmanager_class: this.options.formmanager_class,
								formmanager_data: JSON.stringify(this.options.formmanager_data)
							},
						},
					});
				}
				else
				{
					// Showing loader while redirecting, otherwise user tend to click somewhere in the page.
					// Note: We use a timeout because .always() is called right after here and will hide the loader
					setTimeout(function(){ me._disableFormBeforeLoading(); }, 50);
					// Redirecting after a few ms so the user can see what happened
					setTimeout(function() { location.href = sRedirectUrl; }, iRedirectTimeout);
				}
			}
		},
		_applyCloseRule: function()
		{
			if(this.options.is_modal)
			{
				this.element.closest('.modal').modal('hide');
			}
			else
			{
				// Try to close the window
				window.close();

				// In some browser (eg. Firefox 70), window won't close if it has NOT been open by JS. In that case, we try to redirect to homepage as a fallback.
				var sHomepageUrl = (this.options.base_url !== null) ? this.options.base_url : $('#sidebar .menu .brick_menu_item:first a').attr('href')
				window.location.href = sHomepageUrl;
			}
		},
		_registerBlockers: function()
		{
			$('body').trigger('register_blocker.itop', {
				'sBlockerId': this.element.attr('id'),
				'sTargetElemSelector': '#' + this.element.closest('.modal').attr('id'),
				'oTargetElemSelector': '#' + this.element.closest('.modal').attr('id'),
				'sEventName': 'hide.bs.modal'
			});
			$('body').trigger('register_blocker.itop', {
				'sBlockerId': this.element.attr('id'),
				'sTargetElemSelector': 'document',
				'oTargetElemSelector': document,
				'sEventName': 'beforeunload'
			});
		},
		_unregisterBlockers: function()
		{
			$('body').trigger('unregister_blocker.itop', {
				'sBlockerId': this.element.attr('id')
			});
		},
		submit: function(oEvent)
		{
			this._onSubmitClick(oEvent);
		},
		getOptions: function()
		{
			return this.options;
		},
		getAttachmentIds: function()
		{
			var me = this;
			var aResult = {actual_attachments_ids: [], removed_attachments_ids: []};
			
			// Actual attachments
			this.element.find('.attachments_container :input[name="attachments[]"]').each(function(iIndex, oElement){
				aResult.actual_attachments_ids.push($(oElement).val());
			});
			// Removed attachments
			this.element.find('.attachments_container :input[name="removed_attachments[]"]').each(function(iIndex, oElement){
				aResult.removed_attachments_ids.push($(oElement).val());
			});
			
			return aResult;
		}
	});
});
