/*
 * Copyright (c) 2006 Manuel Traut and Volker Dahnke
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Common Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/cpl-v10.html
 *
 * Contributors: Manuel Traut and Volker Dahnke
 */

package YalpClients.SwtClient;

import YalpInterfaces.*;
import YalpClients.*;

import java.beans.XMLDecoder;
import java.beans.XMLEncoder;
import java.io.*;
import java.net.Inet4Address;
import java.net.MalformedURLException;
import java.net.UnknownHostException;
import java.sql.SQLException;
import java.util.ArrayList;

import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.MessageBox;
import org.eclipse.swt.widgets.Shell;

import org.omg.CosNaming.*;
import org.omg.CosNaming.NamingContextPackage.*;
import org.omg.CORBA.*;

/*
 * Class Model
 *
 * <em>Implementiert die Schnittstellenfunktionen zur Steuerung des Servers
 * (Datenbankinhalte schreiben, lesen; Streaming steuern</em>
 *
 * @author Volker Dahnke / Manuel Traut
 *
 * @version 0.6 14-12-2005<br>
 *
 * @see client.GUI
 */

public class Model {

	public ServerControlInterface srvCon;
	private Process vlcPlayer;
	private Output actualStream;
	private Output streamInfo;
	private ArrayList<Media> findMedia;
	private ArrayList<Media> editMedia;
	private ArrayList<Media> toPlaylist;
	private ArrayList<Media> playList;
	private ArrayList<YalpUser> userList;
	private ClientConfiguration settings;
	private String clientIP;
	private String curPasswd;
	private AccessRights userGroup=AccessRights.DENY;
	private String userName;
	private Boolean playback = false;
	private Boolean logoff= false;
	private Session session;
/*
 * Instances srvConnection to Registry, DbConnection, ServerControl
 * and VlcStreamer. Also instances Class variables
 */
	public Model(String[] argv) {

		this.settings=new ClientConfiguration();
		loadConfig("ClientConfiguration.xml");
		writeConfig("ClientConfiguration.xml");

		try {
			ORB orb = ORB.init(argv, null);

			org.omg.CORBA.Object objRef =
				orb.resolve_initial_references("NameService");

			NamingContextExt ncRef = NamingContextExtHelper.narrow(objRef);

			String name = "YALP_Server";
			srvCon = ServerControlInterfaceHelper.narrow(ncRef.resolve_str(name));
		} catch (Exception e) {// DEBUG
			String errorStr="couldn't connect to YALP Server";

			MessageBox messageBox = new MessageBox(
				new Shell(Display.getDefault(),SWT.MIN), SWT.OK );

			System.out.println(e);
			messageBox.setMessage(errorStr);
			messageBox.open();
			System.exit(0);
		}

		// determine client IP Adress
		try {
			this.clientIP = Inet4Address.getLocalHost().getHostAddress();
			System.out.println(this.clientIP);
		} catch (UnknownHostException e) {
			String errorStr = "Model.model: determine IP failed";

			MessageBox messageBox = new MessageBox(
				new Shell(Display.getDefault(),SWT.MIN), SWT.OK );

			System.out.println(errorStr);
			messageBox.setMessage(errorStr);
			messageBox.open();
			System.exit(0);
		}
		this.userList = new ArrayList<YalpUser>();
		this.playList = new ArrayList<Media>();
		this.toPlaylist = new ArrayList<Media>();
	}

/*
 * write Configuration to XML File
 *
 * @param fileName
 * @return boolean: true if succesful
 */
	public boolean writeConfig(String fileName) {
		try {
			FileOutputStream srvConfigFile = new FileOutputStream(fileName);
			XMLEncoder srvConfigWriter = new XMLEncoder(srvConfigFile);
			srvConfigWriter.writeObject(settings.serverIP);
			srvConfigWriter.writeObject(settings.classServerPort);
			srvConfigWriter.writeObject(settings.registryPort);
			srvConfigWriter.writeObject(settings.vlcCommand);
			srvConfigWriter.close();
		} catch (FileNotFoundException fnfe) {
			return false;
		}
		return true;
	}

/*
 * load Configuration from XML File if possible
 *
 * @param fileName
 * @return boolean: true if succesful
 */
	public boolean loadConfig(String fileName){
		try{
			FileInputStream srvConfigFile = new FileInputStream(fileName);
			XMLDecoder srvConfigLoader = new XMLDecoder(srvConfigFile);
			System.out.println(srvConfigFile);
			settings.serverIP = (String)srvConfigLoader.readObject();
			settings.classServerPort= (Integer)srvConfigLoader.readObject();
			settings.registryPort = (Integer)srvConfigLoader.readObject();
			settings.vlcCommand = (String)srvConfigLoader.readObject();
			srvConfigLoader.close();
		} catch(FileNotFoundException fnfe) {
			System.out.println("Configuration not found, loading defaults...");
			return false;
		} catch(ClassCastException cce) {
			System.out.println("Errors in Configuration, loading defaults...");
			return false;
		}
		return true;
	}

/*
 * get acutal srvConfig object
 *
 * @return ClientConfiguration: aktuelle Konfiguration
 */
	public ClientConfiguration getConfig(){
		return this.settings;
	}

/*
 * setzen und speichern eines ClientConfiguration Files
 *
 * @param set
 * 	 ClientConfiguration.xml
 * @return boolean: true if succesful written Configuration
 */
	public boolean setConfig(ClientConfiguration set){
		this.settings = set;
		return this.writeConfig("ClientConfiguration.xml");
	}

/*
 * Sends YalpUsername and passwd to Server and returns YalpUsergroup
 *
 * @param username
 * @param passwd
 * @return AccessRights
 */
	public AccessRights userVerify(String username,String passwd){
		this.userName=username;
		this.curPasswd = passwd;
		YalpErrorHolder err = new YalpErrorHolder();
		SessionHolder sess = new SessionHolder();
		try{
			// log on server
			this.srvCon.clientLogon(this.userName,passwd,this.clientIP,sess,err);
			this.session = sess.value;
			this.userGroup = sess.value.me.level;
		/*
		} catch (RemoteException e) {
			System.out.println("client.Model: Logon on Server failed 1"+ e);
			e.printStackTrace();
			System.out.println("client.Model: Logon on Server failed 1");
		} catch (MalformedURLException e) {
			System.out.println("client.Model: Logon on Server failed 2");
		} catch (SQLException e) {
			System.out.println("client.Model: Logon on Server failed 3");
		} catch (NotBoundException e) {
			System.out.println("client.Model: Logon on Server failed 4");
		*/
		}catch(NullPointerException e){
			System.out.println("YALP Server couldn't be reached");
			this.userGroup = AccessRights.NO_YALP_SERVER;
		}
		return this.userGroup;
	}

/*
 * Gets a list with all YalpUsers from the server
 *
 * @return ArrayList<YalpUser> all registered YalpUsers
 */
	public ArrayList<YalpUser> getUser(){
		YalpErrorHolder err = new YalpErrorHolder();
		try{
			UsersHolder usr = new UsersHolder();
			this.srvCon.getUser(usr, err);
			this.userList = new ArrayList<YalpUser>(usr.value.length);
			for(int i = 0; i < usr.value.length; i++)
				this.userList.add(usr.value[i]);
		}catch(Exception e){
			System.out.println("Exceoption in Model userList "+ e);
		}
		return userList;
	}

/*
 * Sends User change request to server
 *
 * @param user
 * 		 Configuration with changes on specific YalpUser
 */
	public void changeUser(YalpUser user, String passwd, Action action) {
		YalpErrorHolder err = new YalpErrorHolder();
		try{
			this.srvCon.changeUser( user,
															passwd,
															action,
															err );
			System.out.println(err.value.descr);
		}catch(Exception e){
			System.out.println("Exceoption in Model changeUser "+ e);
		}
	}

/*
 * Sends Media change request to server and refreshes Model data
 *
 * @param media
 * 		 to change
 * @return boolean: succesful changed media
 */
	public Boolean changeMedia(Media media, Action action){
		YalpErrorHolder err = new YalpErrorHolder();
		try{
			this.srvCon.changeMedia(media, action, err);
			if(err.value.code == YalpErrorCode.OK){
				Media result;
				for (int i=0;i<this.editMedia.size();i++){
					result=this.editMedia.get(i);
					/* t.b.d. alter to new db desgin
					if (result.id==media.id){
						result.type=media.type;
						result.title=media.title;
						result.author=media.author;
						result.album=media.album;
						result.category=media.category;
						result.year=media.year;
						result.duration=media.duration;
						result.aBitrate=media.aBitrate;
						result.vBitrate=media.vBitrate;
						result.resolution=media.resolution;
						result.ownerId=media.ownerId;
						result.lastEdit=media.lastEdit;
						result.path=media.path;
						result.name=media.name;
						return true;
					}
					*/
				}
			}
		} catch(Exception e) {
			System.out.println("Exceoption in Model changeUser "+ e);
		}
		return false;
	}

/*
 * adds Media with given id to Playlist
 *
 * @param id
 */
	public void add2PlayList(int id){
		Boolean notfound=true;
		for (int i=0;(i<this.findMedia.size())&& (notfound);i++){
			Media result=this.findMedia.get(i);
			if (result.id==id){
				String name = result.name;
				String path = result.path;
				if(playback){
					this.add2Stream(name, path);
				}
				this.playList.add(result);
				this.toPlaylist.add(result);
				notfound=false;
			}
		}
	}

/*
 * Removes Media with given id from Playlist
 *
 * @param id
 */
	public void removeFromPlayList(int id){
		/* t.b.d.
		this.playList.remItem(id);
		this.toPlaylist.remove(id);
		*/
	}

/*
 * Returns List with items to play
 *
 * @return ArrayList<Media>: ArrayList to create Playlist from
 */
	public ArrayList<Media> getToPlaylist(){
		return this.toPlaylist;
	}

/*
 * Creates new Stream with actual playlist
 *
 * @return Streaminfo: about new created Stream, Client should use this,
 *         information to get the Information howto receive the stream
 */
	public Output createOutput(){
		/* t.b.d. former createStream */
		this.streamInfo.outputAction = Action.CREATE;
		Media[] a = {};
		this.streamInfo.playlist = this.playList.toArray(a);
		return this.streamInfo;
	}

/*
 * Sends search request to server and refreshes Model data
 *
 * @param request
 * 		 Search Request
 * @param kind
 * 		 1 - search in first Window; other ints: search in other window
 *				(admins edit view)
 * @return int: number of results
 */
	public int search(String request, ArrayList<MediaType> types, int kind){
		YalpErrorHolder err = new YalpErrorHolder();
		MediasHolder result = new MediasHolder();
		try{
			MediaType[] a = {};
			if (kind == 1){
				srvCon.search(request, types.toArray(a), result, err);
				for(int i = 0; i < result.value.length; i++)
					this.findMedia.add(result.value[i]);
				return this.findMedia.size();
			} else {
				srvCon.search(request, types.toArray(a), result, err);
				for(int i = 0; i < result.value.length; i++)
					this.editMedia.add(result.value[i]);
				return this.editMedia.size();
			}
		} catch(Exception e){
			System.out.println("Exceoption in Model search "+ e);
			return 0;
		}
	}

/*
 * Returns the search result
 *
 * @param kind
 * 		 1 - for searchMedia of mainwindow; 2 - for searchMedia of editView
 * @return ArrayList<Media>: last found medias
 */

	public ArrayList<Media> getMedia(int kind){
		if (kind==1) return this.findMedia;
		else return this.editMedia;
	}

/*
 * Retuns search result with given id
 *
 * @param id
 * 		 of the result
 * @param kind
 * 		 1 - for mainWindow, 2 for admins editView
 * @return Media: searchMedia, with specified ID
 */
	public Media getMediaWithId(int id,int kind){
		ArrayList<Media> resultList;
		if (kind==1)resultList= this.findMedia;
		else resultList=this.editMedia;
		for (int i=0;(i<resultList.size());i++){
			Media result=resultList.get(i);
			if (result.id==id){
				return result;
			}
		}
		return null;
	}

/*
 * Retuns id of YalpUser with given username
 *
 * @param username
 * @return int: useriD
 */
	public int getOwnerid(String username){
		ArrayList<YalpUser> ownerList =this.userList;
		for (YalpUser owner:ownerList){
			if (owner.name.equals(username)){
				return owner.id;
			}
		}
		return 0;
	}

/*
 * Returns MediaType as string
 *
 * @param mediatype
 * @return string
 */
	public String getTypeName(MediaType type)
	{
		switch(type.value())
		{
			case MediaType._IMAGE:
				return "image";
			case MediaType._SOUND:
				return "sound";
			case MediaType._VIDEO:
				return "video";
			default:
				return "unknown";
		}
	}

/*
 * Returns AccessRights as string
 *
 * @param mediatype
 * @return string
 */
	public String accessRightsName(AccessRights type)
	{
		switch(type.value())
		{
			case AccessRights._USER:
				return "user";
			case AccessRights._ADMIN:
				return "admin";
			case AccessRights._DENY:
				return "no login";
			default:
				return "unknown";
		}
	}


/*
 * Sets class variable actualStream to given value
 *
 * @param aStream
 * 		 stream to srvControl via play, pause, etc
 */
	public void setActualStream(Output aStream){
		this.actualStream = aStream;
	}

/*
 * Starts Video Lan Player
 *
 * @return boolean: true if vlc can be started and a stream is actualStream
 */
	private boolean startVLC(){

		String vlcCmd = settings.vlcCommand +
			" --reset-srvConfig --video-on-top -I telnet --telnet-port 12345 ";
/*
		switch (this.actualStream.getAccess()){
			case UDP:
				vlcCmd += "udp:@";
				break;
			case HTTP:
				vlcCmd += "http://";
				break;
			default:
				System.out.println(
					"client.Model.startVLC: playback this type is not supported" );
		}
*/
		vlcCmd += this.actualStream.info.params;
		System.out.println(vlcCmd);

		try {
			 this.vlcPlayer = Runtime.getRuntime().exec(vlcCmd);
		} catch (IOException e) {
			System.out.println("client.Model.startVLC: starting vlcPlayer failed");
			return false;
		}
		return true;
	}

/*
 * Stops Video Lan Player
 *
 */
	private void stopVLC(){
		this.playback = false;
		this.vlcPlayer.destroy();
	}

/*
 * Starts playback of actual playlist
 *
 * @return void
 */
	public boolean play(){

		this.playback = true;

		this.actualStream = this.createOutput();
		this.actualStream.destIp = this.clientIP;

		YalpErrorHolder err = new YalpErrorHolder();

		OutputHolder tmp = new OutputHolder(this.actualStream);
		this.srvCon.control(tmp, err);
		this.actualStream = tmp.value;

		this.actualStream.outputAction = Action.START;
		OutputHolder tmp2 = new OutputHolder(this.actualStream);
		this.srvCon.control(tmp2, err);
		this.actualStream = tmp2.value;
		this.startVLC();
		return true;
	}

/*
 * Adds a new Media to Playlist. Only during playback
 *
 * @param name
 * @param path
 * @return boolean: true if succesful added
 */
	public boolean add2Stream(String name, String path){

		YalpErrorHolder err = new YalpErrorHolder();
		Media[] empty = {};
		this.actualStream.playlist = empty;

		Media media = new Media();
		media.path = path;
		media.fileName = name;

		this.actualStream.playlist[this.actualStream.playlist.length] = media;
		this.actualStream.outputAction = Action.CREATE;

		OutputHolder tmp = new OutputHolder(this.actualStream);
		this.srvCon.control(tmp, err);
		this.actualStream = tmp.value;
		return true;
	}

/*
 * Stops playback
 *
 * @return boolean: false - if srvConnection to streamer failed
 */
	public boolean stop(){
		YalpErrorHolder err = new YalpErrorHolder();
		this.actualStream.outputAction = Action.STOP;
		OutputHolder tmp = new OutputHolder(this.actualStream);
		this.srvCon.control(tmp,err);
		this.actualStream = tmp.value;
		this.stopVLC();
		return true;
	}

/*
 * jumps to next media in playlist
 *
 * @return boolean: false - if srvConnection to streamer failed
 */
	public boolean next(){
		YalpErrorHolder err = new YalpErrorHolder();
		this.actualStream.outputAction = Action.FORWARD;
		OutputHolder tmp = new OutputHolder(this.actualStream);
		this.srvCon.control(tmp,err);
		this.actualStream = tmp.value;
		return true;
	}

/*
 * Pauses playback
 *
 * @return boolean: false - if srvConnection to streamer failed
 */
	public boolean pause(){
		YalpErrorHolder err = new YalpErrorHolder();
		this.actualStream.outputAction = Action.PAUSE;
		OutputHolder tmp = new OutputHolder(this.actualStream);
		this.srvCon.control(tmp,err);
		this.actualStream = tmp.value;
		return true;
	}

/*
 * Causes the server to clean up and shutdown
 *
 */
	public void serverShutdown(){
		if (this.playback)
			this.stop();
		this.srvCon.serverShutdown();
	}

/*
 * Checks if the server is still alive if not Client shutdown
 *
 */
	public void serverStillAlive(){
		// try{
		//	srvCon.ping();
		/* }catch (RemoteException e){
			if (this.playback)
				this.stopVLC();
			String errorStr="Server shutdown - Client is going down too";

			MessageBox messageBox = new MessageBox(
				new Shell(Display.getDefault(),SWT.MIN), SWT.OK);

			System.out.println(errorStr);
			messageBox.setMessage(errorStr);
			messageBox.open();
			System.exit(0);
		} */
	}

/*
 * Returns client IP address
 *
 * @return String: ipAddress
 */
	public String getClientIp(){
		return this.clientIP;
	}

/*
 * Returns username of logged in user
 *
 * @return String: username
 */
	public String getYalpUserName(){
		return this.userName;
	}

/*
 * Returns indication if playback is runing
 *
 * @return boolean: true - if is play'in
 */
	public Boolean getPlayback(){
		return this.playback;
	}

/*
 * Get Total amount of streams played
 *
 * @return int: number of Streams totally played
 *
	public int getAllStreamNum(){
		try{
			return this.srvCon.getStreamCounter().getAllStreams();
		}catch (Exception e){
			System.out.println("Exception in Model.getAllStreamNum"+e);
		}
		return -1;
	}
 */

/*
 * Gets amount of Streams actual playing
 *
 * @return int: number of Streams play'in at the moment
 *
	public int getActualStreamNum(){
		try{
			return this.srvCon.getStreamCounter().getActualStreams();
		}catch (Exception e){
			System.out.println("Exception in Model.getActualStreamNum"+e);
		}
		return -1;
	}
 */

/*
 * Sets class variable logoff to true and logs off from server
 */
	public void logoff(){
		YalpErrorHolder err = new YalpErrorHolder();
		try{
			this.logoff=true;
			this.srvCon.clientLogoff(this.session, err);
		}catch(Exception e) {// DEBUG
			System.out.println("Model Exeptions in logoff");
			e.printStackTrace();	
		}
	}

/*
 * Returns indication if client is logging of
 *
 * @return Boolean: true - if is logging of
 */
	public Boolean getLogoff(){
		return this.logoff;
	}
}