package vooga.engine.networking.server;

import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

import vooga.engine.util.XMLDocumentCreator;
import vooga.engine.util.XMLFileParser;

/**
 * This class should be running on the server constantly to ensure that games that use the networking API have connection to the server at all times. Makes and
 * starts the VoogaDaemon for each game that uses the networking API. 
 * 
 * @author Cue, Kolodziejzyk, Townsend
 * @version 1.0
 */
public class VoogaServer {
	
	/**
	 * Main method iterates through the list of games in the XML file and runs them on the specified port with the specified ClientHandler subclass.
	 * 
	 * @author Cue, Kolodziejzyk, Townsend
	 * @version 1.0
	 */
	public static void main(String args[]) {
		Document xmlDocument = getXMLDocument("vooga/engine/networking/server/voogaGames.xml");
		Node gameSection = xmlDocument.getElementsByTagName("Games").item(0);
		if(gameSection != null){
			NodeList listOfGames = gameSection.getChildNodes();
			for(int i = 0; i < listOfGames.getLength(); i++)
			{
				if (listOfGames.item(i).getNodeType() == Node.ELEMENT_NODE)
				{
					Element gameElement = (Element) listOfGames.item(i);
					int port = Integer.parseInt(gameElement.getAttribute("port"));
					int chatPort = Integer.parseInt(gameElement.getAttribute("chatPort"));
					int numberOfPlayers = Integer.parseInt(gameElement.getAttribute("numberOfPlayers"));
					String clientHandler = gameElement.getAttribute("clientHandler");
					new VoogaDaemon(port, chatPort, numberOfPlayers, clientHandler).start();
				}
			}
		}
		System.out.println("Vooga server up and running...");
	}

	/**
	 * Static method to return the XML document with the list of games that can be run on the networking Vooga servers.
	 * 
	 * @param path the path of the XML document
	 * @return the XML document with the list of games
	 * @author Cue, Kolodziejzyk, Townsend
	 * @version 1.0
	 */
	private static Document getXMLDocument(String path){
		XMLDocumentCreator xmlCreator = new XMLFileParser(path);
		Document xmlDocument = null;
		try {
			xmlDocument = xmlCreator.getDocument();
		} 
		catch (Exception e) {
			e.printStackTrace();
			System.exit(1);
		}
		return xmlDocument;
	}

	/**
	 * Static method to return the port that the game is run on.
	 * 
	 * @param gameName the name of the game whose port you want to find
	 * @return port the port that the game is run on
	 * @author Cue, Kolodziejzyk, Townsend
	 * @version 1.0
	 */
	public static int getGamePort(String gameName){
		Document xmlDocument = getXMLDocument("src/vooga/engine/networking/server/voogaGames.xml");
		Node gameSection = xmlDocument.getElementsByTagName("Games").item(0);
		if(gameSection != null){
			NodeList listOfGames = gameSection.getChildNodes();
			for(int i = 0; i < listOfGames.getLength(); i++)
			{
				if (listOfGames.item(i).getNodeType() == Node.ELEMENT_NODE)
				{
					Element gameElement = (Element) listOfGames.item(i);
					int port = Integer.parseInt(gameElement.getAttribute("port"));
					String name = gameElement.getAttribute("name");
					if(name.equals(gameName))
						return port;
				}
			}
		}
		return -1;
	}
	
	/**
	 * Static method to return the port that the chat is run on.
	 * 
	 * @return the port that the game is run on
	 * @param gameName the name of the game whose chat port you want to find
	 * @author Cue, Kolodziejzyk, Townsend
	 * @version 1.0
	 */
	public static int getChatPort(String gameName){
		Document xmlDocument = getXMLDocument("src/vooga/engine/networking/server/voogaGames.xml");
		Node gameSection = xmlDocument.getElementsByTagName("Games").item(0);
		if(gameSection != null){
			NodeList listOfGames = gameSection.getChildNodes();
			for(int i = 0; i < listOfGames.getLength(); i++)
			{
				if (listOfGames.item(i).getNodeType() == Node.ELEMENT_NODE)
				{
					Element gameElement = (Element) listOfGames.item(i);
					int port = Integer.parseInt(gameElement.getAttribute("chatPort"));
					String name = gameElement.getAttribute("name");
					if(name.equals(gameName))
						return port;
				}
			}
		}
		return -1;
	}
}