package com.coder.client;

import java.io.IOException;
import java.util.Map;
import java.util.logging.Level;
import java.util.logging.Logger;

import com.coder.client.Session;
import com.coder.client.gui.editor.EditorWindow;
import com.coder.client.gui.editor.EditorWindowListener;
import com.coder.client.gui.login.LoginDialog;
import com.coder.client.gui.login.LoginDialogListener;
import com.coder.client.gui.selectProject.SelectProjectDialog;
import com.coder.client.gui.selectProject.SelectProjectDialogListener;
import com.coder.client.gui.selectServer.SelectServerDialog;
import com.coder.client.gui.selectServer.SelectServerDialogListener;
import com.coder.server.CoderServer;
import com.coder.server.message.CoderMessage;
import com.coder.server.message.ConfigData;
import com.coder.server.message.ProjectListData;
import com.coder.server.message.ProjectListReqMsg;
import com.coder.server.message.ProjectRspMsg;

import zutil.log.CompactLogFormatter;
import zutil.log.LogUtil;
import zutil.net.ssdp.SSDPClient;
import zutil.net.ssdp.SSDPClient.SSDPServiceListener;
import zutil.net.ssdp.StandardSSDPInfo;
import javafx.application.Application;
import javafx.application.Platform;
import javafx.stage.Stage;

public class CoderClient extends Application{
	public static final Logger logger = LogUtil.getLogger();
	
	private Session session;
	private Stage mainStage;
	
	//GUI elements
	private EditorWindow editorWindow;
	private LoginDialog loginDialog;
	private SelectProjectDialog selectProjectDialog;
	private SelectServerDialog selectServerDialog;
	
	//state variables
	private String serverURL = null;
	private int serverPort = CoderServer.SERVER_PORT;
	private String username = null;
	private char[] password = null;		//should only be anything else than null if defined by program argument
	private String loginErrorMessage = "";
	private String project = null;
	
	//services
	SSDPClient ssdpClient;
	
	public static void main(String[] args) {
        Application.launch(args);
    }

	@Override
	public void start(Stage mainStage) throws Exception {
		
		//setup logging
		LogUtil.setGlobalLevel(Level.INFO);
        LogUtil.setGlobalFormatter(new CompactLogFormatter());
		
		//parse program arguments
		Map<String, String> params = this.getParameters().getNamed();
		for(String key : params.keySet()){
			String value = params.get(key);
			if(key.equals("username")){
				this.username = value;
			}else if(key.equals("password")){
				this.password = value.toCharArray();
			}else if(key.equals("url")){
				this.serverURL = value;
			}else if(key.equals("port")){
				try{
					this.serverPort = Integer.parseInt(value);
				}catch(NumberFormatException e){
					logger.warning("port argument to program is not of a integer type. using default port.");
				}
			}else if(key.equals("project")){
				this.project = value;
			}
		}
		if(this.username == null){	//ignore the password if no username was set
			this.password = null;
		}
		
		//setup GUI elements
		this.mainStage = mainStage;
		mainStage.setTitle("CoderClient");
		try{
			setupSelectServerDialog();
			setupLoginDialog();
			setupSelectProjectDialog();
			setupEditWindow();
		}catch(IOException e){
			logger.log(Level.SEVERE, "could not load all GUI elements", e);
			System.exit(1);
		}
		
		//setup SSDP client
		try{
			setupSSDPClient();
		}catch(IOException e){
			logger.log(Level.SEVERE, "could not setup SSDP client", e);
			System.exit(1);
		}
		
		//start program logic
		selectServerDialog.showOnStage(mainStage);

	}
	
	private void setupSelectServerDialog() throws IOException{
		this.selectServerDialog = new SelectServerDialog();
		this.selectServerDialog.addSelectProjectDialogListener(new SelectServerDialogListener() {
			@Override
			public void willShow() {
				closeCurrentSession();
				ssdpClient.clearServices();
				selectServerDialog.clearServerList();
				if(ssdpClient != null){
					ssdpClient.requestService("coder:discover");
				}else{
					logger.severe("could not send a SSDP request since the client is not setup");
				}
				selectServerDialog.setServerAddress(serverURL);
				selectServerDialog.setServerPort(serverPort);
			}
			@Override
			public void exit() {
				logger.info("terminating");
				System.exit(0);
			}
			@Override
			public void connect(String address, int port) {
				//selectServerDialog.hide();
				serverURL = address;
				serverPort = port;
				//connect session
				session = Session.setupConnection(serverURL, serverPort);
				if(session == null){
					logger.warning("Could not setup a connection to " + serverURL + ":" + port);
					serverURL = null;
					serverPort = CoderServer.SERVER_PORT;
					selectServerDialog.showOnStage(mainStage);
				}else{
					loginDialog.showOnStage(mainStage);
				}
			}
		});
	}
	
	private void setupLoginDialog() throws IOException {
		this.loginDialog = new LoginDialog();
		this.loginDialog.addLoginDialogListener(new LoginDialogListener(){
			@Override
			public void willShow() {
				loginDialog.setUsername(username);
				loginDialog.setPassword(password);
				loginDialog.setErrorMessage(loginErrorMessage);
			}
			@Override
			public void cancel() {
				serverURL = null;
				serverPort = CoderServer.SERVER_PORT;
				selectServerDialog.showOnStage(mainStage);
			}
			@Override
			public void login(String uname, char[] paswd) {
				username = uname;
				password = paswd;
				//authenticate session
				boolean authenticated = session.authenticate(username, password);
				if(!authenticated){
					logger.severe("Authentication failed: wrong username or password");
					password = null;
					loginErrorMessage = "Wrong username or password";
					selectServerDialog.showOnStage(mainStage);
				}else{
					loginErrorMessage = "";
					setupSessionListener();	//resister a message listener to the session
					session.start();	//start receiving traffic from the server
					selectProjectDialog.showOnStage(mainStage);
				}
			}
			private void setupSessionListener(){
				session.addCoderMessageReceivedListener(new CoderMessageReceivedListener() {
					@Override
					public void projectListRspReceived(final Map<String, ProjectListData> projectListRsp) {
						Platform.runLater(new Runnable() {
						    @Override
						    public void run() {
						    	for(String projectName : projectListRsp.keySet()){
									ProjectListData projectData = projectListRsp.get(projectName);
									selectProjectDialog.addProjectToList(projectName, projectData);
								}
						    }
						});
					}
					@Override
					public void projectRspReceived(ProjectRspMsg projectRspMsg) {
						// TODO Auto-generated method stub
					}
					@Override
					public void projectTypeRspReceived(Map<String, ConfigData> projectTypeRsp) {
						// TODO Auto-generated method stub
						
					}
				});
			}
		});
	}
	
	private void setupSelectProjectDialog() throws IOException {
		this.selectProjectDialog = new SelectProjectDialog();
		this.selectProjectDialog.addSelectProjectDialogListener(new SelectProjectDialogListener() {
			@Override
			public void willShow() {
				selectProjectDialog.clearProjectList();
				if(project == null){
					sendProjectListReq();
				}else{
					selectProjectDialog.setProject(project);
				}
			}
			@Override
			public void open(String selectedProjectName) {
				project = selectedProjectName;
				editorWindow.showOnStage(mainStage);
			}
			@Override
			public void newProject() {
				//TODO
			}
			@Override
			public void cancel() {
				serverURL = null;
				serverPort = CoderServer.SERVER_PORT;
				selectServerDialog.showOnStage(mainStage);
			}
			@Override
			public void refresh() {
				selectProjectDialog.clearProjectList();
				sendProjectListReq();
			}
			private void sendProjectListReq(){
				//send a request for a new list of projects
				CoderMessage msg = new CoderMessage();
				msg.ProjectListReq = new ProjectListReqMsg();
				try {
					session.send(msg);
				} catch (IOException e) {
					logger.log(Level.SEVERE, "Unable to send ProjectListReqMsg", e);
					closeCurrentSession();
				}
			}
		});
	}
	
	private void setupEditWindow() throws IOException {
		this.editorWindow = new EditorWindow();
		this.editorWindow.addEditorWindowListener(new EditorWindowListener() {
			@Override
			public void willShow() {
				//TODO
			}
			@Override
			public void compile() {
				//TODO
			}
			@Override
			public void run() {
				//TODO
			}
		});
	}
	
	private void setupSSDPClient() throws IOException{
		this.ssdpClient = new SSDPClient();
		ssdpClient.setListener(new SSDPServiceListener() {
			@Override
			public void newService(final StandardSSDPInfo service) {
				if(selectServerDialog != null){
					Platform.runLater(new Runnable() {
					    @Override
					    public void run() {
							String ip = service.getInetAddress().getHostAddress();
							selectServerDialog.addServerToList(ip);
					    }
					});
				}
			}
		});
		ssdpClient.start();
	}
	
	private void closeCurrentSession(){
		if(this.session != null){
			logger.info("disconnecting from server");
			session.close();
			session = null;
		}
	}

}