/**
 * @copyright  (C) 2016 Open Source Matters, Inc. <https://www.joomla.org>
 * @license    GNU General Public License version 2 or later; see LICENSE.txt
 */

(function() {
	"use strict";

	/**
	 * Process modal fields in parent.
	 *
	 * @param   string  fieldPrefix  The fields to be updated prefix.
	 * @param   string  id           The new id for the item.
	 * @param   string  title        The new title for the item.
	 * @param   string  catid        Future usage.
	 * @param   object  object       Future usage.
	 * @param   string  url          Future usage.
	 * @param   string  language     Future usage.
	 *
	 * @return  boolean
	 *
	 * @since   3.7.0
	 */
	window.processModalParent = function (fieldPrefix, id, title, catid, url, language, object)
	{
		var fieldId = document.getElementById(fieldPrefix + '_id') || document.getElementById(fieldPrefix + '_value'),
			fieldTitle = document.getElementById(fieldPrefix + '_name') || document.getElementById(fieldPrefix);

		// Default values.
		id       = id || '';
		title    = title || '';
		catid    = catid || '';
		object   = object || '';
		url      = url || '';
		language = language || '';

		var isChanged = fieldId.value !== id;

		if (id)
		{
			fieldId.value    = id;
			fieldTitle.value = title;

			if (document.getElementById(fieldPrefix + '_select'))
			{
				document.getElementById(fieldPrefix + '_select').classList.add('hidden');
			}
			if (document.getElementById(fieldPrefix + '_new'))
			{
				document.getElementById(fieldPrefix + '_new').classList.add('hidden');
			}
			if (document.getElementById(fieldPrefix + '_edit'))
			{
				document.getElementById(fieldPrefix + '_edit').classList.remove('hidden');
			}
			if (document.getElementById(fieldPrefix + '_clear'))
			{
				document.getElementById(fieldPrefix + '_clear').classList.remove('hidden');
			}
			if (document.getElementById(fieldPrefix + '_propagate'))
			{
				document.getElementById(fieldPrefix + '_propagate').classList.remove('hidden');
			}
		}
		else
		{
			fieldId.value    = '';
			fieldTitle.value = fieldId.getAttribute('data-text');

			if (document.getElementById(fieldPrefix + '_select'))
			{
				document.getElementById(fieldPrefix + '_select').classList.remove('hidden');
			}
			if (document.getElementById(fieldPrefix + '_new'))
			{
				document.getElementById(fieldPrefix + '_new').classList.remove('hidden');
			}
			if (document.getElementById(fieldPrefix + '_edit'))
			{
				document.getElementById(fieldPrefix + '_edit').classList.add('hidden');
			}
			if (document.getElementById(fieldPrefix + '_clear'))
			{
				document.getElementById(fieldPrefix + '_clear').classList.add('hidden');
			}
			if (document.getElementById(fieldPrefix + '_propagate'))
			{
				document.getElementById(fieldPrefix + '_propagate').classList.add('hidden');
			}
		}

		if (isChanged) {
			fieldId.dispatchEvent(new CustomEvent('change', { bubbles: true, cancelable: true }));
		}

		if (fieldId.getAttribute('data-required') == '1')
		{
			document.formvalidator.validate(fieldId);
			document.formvalidator.validate(fieldTitle);
		}

		return false;
	};

	/**
	 * Process new/edit modal fields in child.
	 *
	 * @param   object  element       The modal footer button element.
	 * @param   string  fieldPrefix   The fields to be updated prefix.
	 * @param   string  action        Modal action (add, edit).
	 * @param   string  itemType      The item type (Article, Contact, etc).
	 * @param   string  task          Task to be done (apply, save, cancel).
	 * @param   string  formId        Id of the form field (defaults to itemtype-form).
	 * @param   string  idFieldId     Id of the id field (defaults to jform_id).
	 * @param   string  titleFieldId  Id of the title field (defaults to jform_title).
	 *
	 * @return  boolean
	 *
	 * @since   3.7.0
	 */
	window.processModalEdit = function (element, fieldPrefix, action, itemType, task, formId, idFieldId, titleFieldId)
	{
		formId       = formId || itemType.toLowerCase() + '-form';
		idFieldId    = idFieldId || 'jform_id';
		titleFieldId = titleFieldId || 'jform_title';

		var modalId = element.parentNode.parentNode.parentNode.parentNode.id, submittedTask = task;
		var iframe  = document.getElementById(modalId).getElementsByTagName('iframe')[0];

		// Set frame id.
		iframe.id = 'Frame_' + modalId;

		var iframeDocument = iframe.contentDocument;

		// If Close (cancel task), close the modal.
		if (task === 'cancel')
		{
			// Submit button on child iframe so we can check out.
			iframe.contentWindow.Joomla.submitbutton(itemType.toLowerCase() + '.' + task);

			Joomla.Modal.getCurrent().close();
		}
		// For Save (apply task) and Save & Close (save task).
		else
		{
			// Attach onload event to the iframe.
			iframe.addEventListener('load', function()
			{
				// Reload iframe document var value.
				iframeDocument = this.contentDocument;

				// Validate the child form and update parent form.
				if (
					iframeDocument.getElementById(idFieldId)
					&& iframeDocument.getElementById(idFieldId).value != '0'
					&& [].slice.call(iframeDocument.querySelectorAll('joomla-alert[type="danger"]')).length == 0
				) {
					window.processModalParent(fieldPrefix, iframeDocument.getElementById(idFieldId).value, iframeDocument.getElementById(titleFieldId).value);

					// If Save & Close (save task), submit the edit close action (so we don't have checked out items).
					if (task === 'save')
					{
						window.processModalEdit(element, fieldPrefix, 'edit', itemType, 'cancel', formId, idFieldId, titleFieldId);
					}
				}

				// Show the iframe again for future modals or in case of error.
				iframe.classList.remove('visually-hidden');
			});

			// Submit button on child iframe.
			if (iframeDocument.formvalidator.isValid(iframeDocument.getElementById(formId)))
			{
				// For Save & Close (save task) when creating we need to replace the task as apply because of redirects after submit and hide the iframe.
				if (task === 'save')
				{
					submittedTask = 'apply';
					iframe.classList.add('visually-hidden');
				}

				iframe.contentWindow.Joomla.submitbutton(itemType.toLowerCase() + '.' + submittedTask);
			}
		}

		return false;
	};

	/**
	 * Process select modal fields in child.
	 *
	 * @param   string  itemType     The item type (Article, Contact, etc).
	 * @param   string  fieldPrefix  The fields to be updated prefix.
	 * @param   string  id           The new id for the item.
	 * @param   string  title        The new title for the item.
	 * @param   string  catid        Future usage.
	 * @param   object  object       Future usage.
	 * @param   string  url          Future usage.
	 * @param   string  language     Future usage.
	 *
	 * @return  boolean
	 *
	 * @since   3.7.0
	 */
	window.processModalSelect = function(itemType, fieldPrefix, id, title, catid, object, url, language) {
		window.processModalParent(fieldPrefix, id, title, catid, url, language, object);

		// Close Modal only when necessary.
		if (Joomla.Modal.getCurrent())
		{
			Joomla.Modal.getCurrent().close();
		}

		return false;
	};

}());