(function($, undefined) {

	// Extract vars.
	var editor = wp.data.dispatch( 'core/editor' );
	var editorSelect = wp.data.select( 'core/editor' );
	var notices = wp.data.dispatch( 'core/notices' );
	var locked = false;

	// Backup original method.
	var savePost = editor.savePost;

	// Listen for changes to post status and perform actions:
	// a) Enable validation for "publish" action.
	// b) Remember last non "publish" status used for restoring after validation fail.
	var useValidation = false;
	var lastPostStatus = '';
	wp.data.subscribe(function() {
		var postStatus = editorSelect.getEditedPostAttribute( 'status' );
		useValidation = ( postStatus === 'publish' || postStatus === 'future' );
		lastPostStatus = ( postStatus !== 'publish' ) ? postStatus : lastPostStatus;
	});

	var jb_save_post_promise_resolve;

	// Create validation version.
	editor.savePost = function( options ){
		options = options || {};

		// Backup vars.
		var _this = this;
		var _args = arguments;

		// Perform validation within a Promise.
		return new Promise(function( resolve, reject ) {
			jb_save_post_promise_resolve = resolve;

			// Bail early if is autosave or preview.
			if ( ! locked && ( options.isAutosave || options.isPreview ) ) {
				return resolve( 'Validation ignored (autosave).' );
			}

			// Bail early if validation is not needed.
			if ( ! useValidation ) {
				return resolve( 'Validation ignored (draft).' );
			}

			var formdata = $('form.metabox-location-normal').serializeArray();
			var data = {};
			$(formdata).each(function(index, obj){
				var name = obj.name.substring(
					obj.name.lastIndexOf("[") + 1,
					obj.name.lastIndexOf("]")
				);
				data[name] = obj.value;
			});

			var description = wp.data.select( "core/editor" ).getEditedPostContent();

			wp.ajax.send( 'jb-validate-job-data', {
				data: {
					description: description,
					data: data,
					nonce: jb_admin_data.nonce
				},
				success: function( answer ) {
					$('.jb-forms-line .jb-forms-field').css('border', '#8c8f94 solid 1px');
					$('.jb-forms-line .jb-forms-field').parent().find('p.description').css('color', '#2c3338');

					if ( answer.valid ) {
						notices.removeNotice( 'jbwp-validation' );
						// Resolve promise and allow savePost().
						resolve( 'Validation bypassed.' );
						editor.unlockPostSaving( 'jbwp' );
						notices.removeNotice( 'jbwp-validation' );
						locked = false;
					} else {
						if ( answer.empty ) {
							answer.empty.forEach(function (item, i, arr) {
								$('#jb-job-meta_' + item).css('border', '#d63638 solid 1px');
							});
						}
						if ( answer.wrong ) {
							answer.wrong.forEach(function (item, i, arr) {
								$('#jb-job-meta_' + item).css('border', '#d63638 solid 1px');
								$('#jb-job-meta_' + item).parent().find('p.description').css('color', '#d63638');
							});
						}

						editor.lockPostSaving( 'jbwp' );
						notices.createErrorNotice( answer.notice, {
							id: 'jbwp-validation',
							isDismissible: true
						});
						locked = true;
					}
				},
				error: function( data ) {
					console.log(data);
					// Always unlock the form after AJAX error.
					editor.unlockPostSaving( 'jbwp' );
					locked = false;
				}
			});
		}).then(function(){
			return savePost.apply(_this, _args);
		}).catch(function(err){
			// Nothing to do here, user is alerted of validation issues.
		});
	};


	function jb_send_validation_request( callback, ms ) {
		var timer = 0;
		return function() {
			var context = this, args = arguments;
			clearTimeout( timer );
			timer = setTimeout(function () {
				callback.apply( context, args );
			}, ms || 0);
		};
	}

	$( document.body ).on( 'keyup', '.jb-forms-line .jb-forms-field', jb_send_validation_request( function () {
		if ( locked ) {

			var formdata = $('form.metabox-location-normal').serializeArray();
			var data = {};
			$(formdata).each(function(index, obj){
				var name = obj.name.substring(
					obj.name.lastIndexOf("[") + 1,
					obj.name.lastIndexOf("]")
				);
				data[name] = obj.value;
			});

			var description = wp.data.select( "core/editor" ).getEditedPostContent();

			wp.ajax.send( 'jb-validate-job-data', {
				data: {
					description: description,
					data: data,
					nonce: jb_admin_data.nonce
				},
				success: function( answer ) {
					$('.jb-forms-line .jb-forms-field').css('border', '#8c8f94 solid 1px');
					$('.jb-forms-line .jb-forms-field').parent().find('p.description').css('color', '#2c3338');

					if ( answer.valid ) {
						notices.removeNotice( 'jbwp-validation' );
						editor.unlockPostSaving( 'jbwp' );
						notices.removeNotice( 'jbwp-validation' );
						locked = false;
						// Resolve promise and allow savePost().
						jb_save_post_promise_resolve( 'Validation bypassed.' );
					} else {
						if ( answer.empty ) {
							answer.empty.forEach(function (item, i, arr) {
								$('#jb-job-meta_' + item).css('border', '#d63638 solid 1px');
							});
						}
						if ( answer.wrong ) {
							answer.wrong.forEach(function (item, i, arr) {
								$('#jb-job-meta_' + item).css('border', '#d63638 solid 1px');
								$('#jb-job-meta_' + item).parent().find('p.description').css('color', '#d63638');
							});
						}

						editor.lockPostSaving( 'jbwp' );
						notices.createErrorNotice( answer.notice, {
							id: 'jbwp-validation',
							isDismissible: true
						});
						locked = true;
					}
				},
				error: function( data ) {
					console.log(data);
					// Always unlock the form after AJAX error.
					editor.unlockPostSaving( 'jbwp' );
					locked = false;
				}
			});
		}
	}, 1000 ) );

})(jQuery);