/*******************************************************************************
 * Copyright (c) 2015 Zend Technologies Ltd.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 * 
 * Contributors:
 *    Zend Technologies Ltd. - initial API and implementation
 *******************************************************************************/
package org.zend.php.zendserver.deployment.debug.core;

import java.net.MalformedURLException;
import java.util.List;

import org.eclipse.php.internal.debug.core.preferences.PHPDebuggersRegistry;
import org.eclipse.php.internal.debug.core.xdebug.dbgp.XDebugDebuggerConfiguration;
import org.eclipse.php.internal.debug.core.zend.debugger.ZendDebuggerConfiguration;
import org.eclipse.php.internal.server.core.Logger;
import org.eclipse.php.internal.server.core.Server;
import org.zend.php.server.core.utils.ServerUtils;
import org.zend.sdklib.internal.application.ZendConnection;
import org.zend.sdklib.target.IZendTarget;
import org.zend.webapi.core.WebApiClient;
import org.zend.webapi.core.WebApiException;
import org.zend.webapi.core.connection.data.DirectiveInfo;
import org.zend.webapi.core.connection.data.DirectivesList;
import org.zend.webapi.core.connection.data.ExtensionInfo;

@SuppressWarnings("restriction")
public class DebugUtils {

	private static final String ZEND_DEBUGGER_EXT_NAME = "Zend Debugger"; //$NON-NLS-1$
	private static final String XDEBUG_EXT_NAME = "xdebug"; //$NON-NLS-1$
	private static final String DIRECTIVE_ALLOW_HOSTS = "zend_debugger.allow_hosts"; //$NON-NLS-1$

	/**
	 * Detects and returns debugger type id that is installed on top of given
	 * Zend target. It uses Web API calls to fetch the appropriate data.
	 * 
	 * @param target
	 * @return debugger type id
	 */
	public static final String getDebuggerId(IZendTarget target) {
		if (target == null)
			return PHPDebuggersRegistry.NONE_DEBUGGER_ID;
		ZendConnection zendConnection = new ZendConnection() {
		};
		List<ExtensionInfo> extensionsListInfo;
		try {
			WebApiClient webApiClient = zendConnection.getClient(target);
			extensionsListInfo = webApiClient.configurationExtensionsList(ZEND_DEBUGGER_EXT_NAME).getExtensionsInfo();
			if (!extensionsListInfo.isEmpty()) {
				ExtensionInfo extensionInfo = extensionsListInfo.get(0);
				if (extensionInfo.isInstalled() && extensionInfo.isLoaded())
					return ZendDebuggerConfiguration.ID;
			}
			extensionsListInfo = webApiClient.configurationExtensionsList(XDEBUG_EXT_NAME).getExtensionsInfo();
			if (!extensionsListInfo.isEmpty()) {
				ExtensionInfo extensionInfo = extensionsListInfo.get(0);
				if (extensionInfo.isInstalled() && extensionInfo.isLoaded())
					return XDebugDebuggerConfiguration.ID;
			}
		} catch (MalformedURLException e) {
			Logger.logException(e);
		} catch (WebApiException e) {
			Logger.logException(e);
		}
		return PHPDebuggersRegistry.NONE_DEBUGGER_ID;
	}

	/**
	 * Gets the list of allowed host for Zend Debugger. It uses Web API calls to
	 * fetch the appropriate data.
	 * 
	 * @param server
	 * @return allowed hosts list or <code>null</code> if Web API can not be
	 *         used
	 * @throws MalformedURLException
	 * @throws WebApiException
	 */
	public static final String getAllowedHosts(Server server) throws MalformedURLException, WebApiException {
		IZendTarget target = ServerUtils.getTarget(server);
		if (target == null)
			return null;
		ZendConnection zendConnection = new ZendConnection() {
		};
		DirectivesList directivesList;
		WebApiClient webApiClient = zendConnection.getClient(target);
		directivesList = webApiClient.configurationDirectivesList(ZEND_DEBUGGER_EXT_NAME, DIRECTIVE_ALLOW_HOSTS, null);
		if (directivesList.getDirectivesInfo() != null) {
			DirectiveInfo directiveInfo = directivesList.getDirectivesInfo().get(0);
			return directiveInfo.getFileValue();
		}
		return null;
	}

}