/*globals jQuery, WPML_core, ajaxurl, icl_post_edit_messages */
(function () {
    'use strict';

    /** @namespace icl_post_edit_messages.switch_language_title */
    /** @namespace icl_post_edit_messages.switch_language_alert */
    /** @namespace icl_post_edit_messages.connection_loss_alert */
    /** @namespace icl_post_edit_messages.switch_language_message */
    /** @namespace icl_post_edit_messages.switch_language_confirm */
    /** @namespace icl_post_edit_messages._nonce */

    jQuery(function () {
        var language_selector;
        /* Check if we have a language switcher present. */
        language_selector = jQuery('select[name="icl_post_language"]');
        if (jQuery('[name="_wpml_root_page"]').length !== 0) {
            jQuery('#edit-slug-box').hide();
        }

        if (language_selector.length !== 0) {
            language_selector.on('change', iclPostLanguageAskConfirmation);
            iclSwitchPostLanguage();
		} else {
			// just add a hidden field with the information and the same id as the language switcher to the dom
			jQuery.ajax({
										type:     "POST",
										url:      ajaxurl,
										dataType: 'json',
										data:     {
											action: 'wpml_get_default_lang'
										},
										success:  function (response) {
											var hidden_language_field = jQuery('<input id="icl_post_language" type="hidden"/>');
											hidden_language_field.val(response.data);
											jQuery(".wrap").append(hidden_language_field);
											iclSwitchPostLanguage();
										}
									});
		}
	});

	function iclGetSwitchLanguageConfirmation() {
		var lang_switch_confirm_html;
		var defer = jQuery.Deferred();

		lang_switch_confirm_html = '<div id="icl_confirm_lang_switch">';
		lang_switch_confirm_html += '<h2>{switch_language_title}</h2>';
		lang_switch_confirm_html += '<p>{switch_language_message}</p>';
		lang_switch_confirm_html += '<p>{switch_language_confirm}</p>';
		lang_switch_confirm_html += '</div>';

		// make sure the title is html entities encoded.
		var post_name = WPML_core.htmlentities(jQuery('#title').val());
		if (post_name.length == 0) {
			post_name = icl_post_edit_messages.empty_post_title;
		}

		lang_switch_confirm_html = lang_switch_confirm_html.replace('{switch_language_title}', icl_post_edit_messages.switch_language_title);
		lang_switch_confirm_html = lang_switch_confirm_html.replace('{switch_language_message}', icl_post_edit_messages.switch_language_message);
		lang_switch_confirm_html = lang_switch_confirm_html.replace('{switch_language_confirm}', icl_post_edit_messages.switch_language_confirm);
		lang_switch_confirm_html = lang_switch_confirm_html.replace('{post_name}', '<i>' + post_name + '</i>');

        jQuery(lang_switch_confirm_html).dialog({
            modal: true,
            width: 'auto',
            buttons: [
				{
					text : icl_post_edit_messages.ok_button_label,
					id : "ok",
					click: function () {
                        defer.resolve();
                        jQuery(this).dialog("close");

                    }
				},
                {
                    text : icl_post_edit_messages.cancel_button_label,
                    id : "cancel",
                    click: function () {
                        defer.reject();
                        jQuery(this).dialog("close");

                    }
                }
			]
        });
		return defer.promise();
	}

	function iclPostLanguageAskConfirmation() {

		var post_language_switcher = jQuery('#icl_post_language');
		var previous_post_language = post_language_switcher.data('last_lang');

		jQuery('#edit-slug-buttons').find('> .cancel').click();

		iclGetSwitchLanguageConfirmation().done(function () {
			iclSwitchPostLanguage();
		}).fail(function () {
			post_language_switcher.val(previous_post_language);
		});
	}

	function iclSwitchPostLanguage() {
		var post_language_switcher = jQuery('#icl_post_language');
		var parent = post_language_switcher.parent();
		var nonce = parent.find('[name="nonce"]').val();
		var new_post_language = post_language_switcher.val();
		var previous_post_language = post_language_switcher.data('last_lang');
		var post_id = jQuery('#post_ID').val();
		if (!previous_post_language) {
			post_language_switcher.data('last_lang', new_post_language);
		} else {
			jQuery.ajax({
										type:     "POST",
										url:      ajaxurl,
										dataType: 'json',
										data:     {
											wpml_from:    previous_post_language,
											action:       'wpml_switch_post_language',
											nonce:        nonce,
											/** @todo: remove the following line as most likely obsolete */
											_icl_nonce:   icl_post_edit_messages._nonce,
											wpml_to:      new_post_language,
											wpml_post_id: post_id
										},
										success:  function () {
											post_language_switcher.data('last_lang', new_post_language);
											var url = jQuery(location).attr('href');
											if (/lang=/.test(url)) {
												url = url.replace(/([\?&])(lang=)[^&#]*/, '$1$2' + new_post_language);
											} else {
												var sep = (url.indexOf('?') > -1) ? '&' : '?';
												url = url + sep + 'lang=' + new_post_language;
											}

											window.location.replace(url);
										}
									});
		}
	}
})();