/*******************************************************************************
 * Copyright (c) 2015 itemis AG (http://www.itemis.eu) and others.
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License 2.0 which is available at
 * http://www.eclipse.org/legal/epl-2.0.
 *
 * SPDX-License-Identifier: EPL-2.0
 *******************************************************************************/

define(['xtext/services/XtextService', 'jquery'], function(XtextService, jQuery) {
	
	/**
	 * Service class for formatting text.
	 */
	function FormattingService(serviceUrl, resourceId, updateService) {
		this.initialize(serviceUrl, 'format', resourceId, updateService);
	};

	FormattingService.prototype = new XtextService();

	FormattingService.prototype._initServerData = function(serverData, editorContext, params) {
		var selection = params.selection ? params.selection : editorContext.getSelection();
		if (selection.end > selection.start) {
			serverData.selectionStart = selection.start;
			serverData.selectionEnd = selection.end;
		}
		return {
			httpMethod: 'POST'
		};
	};
	
	FormattingService.prototype._processResult = function(result, editorContext) {
		// The text update may be asynchronous, so we have to compute the new text ourselves
		var newText;
		if (result.replaceRegion) {
			var fullText = editorContext.getText();
			var start = result.replaceRegion.offset;
			var end = result.replaceRegion.offset + result.replaceRegion.length;
			editorContext.setText(result.formattedText, start, end);
			newText = fullText.substring(0, start) + result.formattedText + fullText.substring(end);
		} else {
			editorContext.setText(result.formattedText);
			newText = result.formattedText;
		}
		var listeners = editorContext.updateServerState(newText, result.stateId);
		for (var i = 0; i < listeners.length; i++) {
			listeners[i]({});
		}
	};
	
	return FormattingService;
});