/**
 *  Copyright (c) 2013-2016 Angelo ZERR.
 *  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:
 *  Angelo Zerr <angelo.zerr@gmail.com> - initial API and implementation
 */
package tern.eclipse.ide.server.nodejs.internal.core.preferences;

import org.eclipse.core.runtime.preferences.DefaultScope;
import org.eclipse.core.runtime.preferences.IEclipsePreferences;

import tern.eclipse.ide.server.nodejs.core.IDENodejsProcessHelper;
import tern.eclipse.ide.server.nodejs.core.INodejsInstall;
import tern.eclipse.ide.server.nodejs.core.INodejsInstallManager;
import tern.eclipse.ide.server.nodejs.core.TernNodejsCoreConstants;
import tern.eclipse.ide.server.nodejs.core.TernNodejsCorePlugin;
import tern.eclipse.ide.server.nodejs.internal.core.NodejsInstall;
import tern.server.nodejs.NodejsTernHelper;

/**
 * Initialize default tern core preferences.
 * 
 */
public class TernNodejsCorePreferenceConstants {

	/**
	 * Initializes the given preference store with the default values.
	 * 
	 * @param store
	 *            the preference store to be initialized
	 */
	public static void initializeDefaultValues() {
		IEclipsePreferences node = new DefaultScope()
				.getNode(TernNodejsCorePlugin.PLUGIN_ID);

		// initialize properties for remote access of node.js server
		initializeRemoteAccess(node);

		// initialize properties for direct access of node.js server (start an
		// internal process)
		initializeDirectAccess(node);
	}

	/**
	 * initialize properties for for remote access of node.js server
	 * 
	 * @param node
	 */
	private static void initializeRemoteAccess(IEclipsePreferences node) {
		// is remote access?
		node.putBoolean(TernNodejsCoreConstants.NODEJS_REMOTE_ACCESS,
				NodejsTernHelper.DEFAULT_REMOTE_ACCESS);
		// port of the remote node.js server
		node.putInt(TernNodejsCoreConstants.NODEJS_REMOTE_PORT,
				NodejsTernHelper.DEFAULT_REMOTE_PORT);
	}

	/**
	 * initialize properties for direct access of node.js server (start an
	 * internal process)
	 * 
	 * @param node
	 */
	private static void initializeDirectAccess(IEclipsePreferences node) {
		// By default use the embedded Node.js install (if exists)
		if (!useBundledNodeJsInstall(node)) {
			// Use native node.js install in case there is no embedded install.
			node.put(TernNodejsCoreConstants.NODEJS_INSTALL,
					NodejsInstall.NODE_NATIVE);
			node.put(TernNodejsCoreConstants.NODEJS_PATH,
					IDENodejsProcessHelper.getNodejsPath());
		}
		// timeout to start node.js
		node.putLong(TernNodejsCoreConstants.NODEJS_TIMEOUT,
				NodejsTernHelper.DEFAULT_TIMEOUT);
		// test number to start node.js
		node.putInt(TernNodejsCoreConstants.NODEJS_TEST_NUMBER,
				NodejsTernHelper.DEFAULT_TEST_NUMBER);
		// node.js persistent (not auto-shutdown ?)
		node.putBoolean(TernNodejsCoreConstants.NODEJS_PERSISTENT,
				NodejsTernHelper.DEFAULT_PERSISTENT);
	}

	private static boolean useBundledNodeJsInstall(IEclipsePreferences node) {
		INodejsInstallManager installManager = TernNodejsCorePlugin
				.getNodejsInstallManager();
		INodejsInstall[] installs = installManager.getNodejsInstalls();
		for (INodejsInstall install : installs) {
			if (!install.isNative()) {
				node.put(TernNodejsCoreConstants.NODEJS_INSTALL,
						install.getId());
				return true;
			}
		}
		return false;
	}

	// Don't instantiate
	private TernNodejsCorePreferenceConstants() {
	}

}