package gui.intro;

import java.awt.Color;
import java.awt.Component;
import java.awt.Image;
import java.awt.SystemColor;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.util.List;
import java.util.concurrent.ExecutionException;

import javax.swing.ButtonGroup;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JRadioButton;
import javax.swing.JTextField;
import javax.swing.SwingConstants;
import javax.swing.SwingWorker;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.border.EmptyBorder;
import javax.swing.border.TitledBorder;

import models.SessionData;
import models.person;

import org.apache.log4j.Logger;
import org.apache.thrift.TException;
import org.openslx.imagemaster.thrift.iface.ImageServer.Client;
import org.openslx.imagemaster.thrift.iface.UserInfo;

//import server.generated.Server.Client;
import thrift.MasterThriftConnection;
import thrift.ThriftConnection;
import util.GuiOrganizer;
import util.ResourceLoader;
import util.ShibbolethECP;
import config.Config;

@SuppressWarnings("serial")
public class Login_GUI extends JFrame {

	/**
	 * Logger instance for this class.
	 */
	private final static Logger LOGGER = Logger.getLogger(Login_GUI.class);
	
	// String constants representing the different login methods
	private final static String LOGIN_TYPE_BWIDM = "bwidm";
	private final static String LOGIN_TYPE_BWLEHRPOOL = "bwlp";
	private final static String LOGIN_TYPE_SATELLITE = "sat";
	
	private JPanel contentPane;
	private JTextField lblusername;
	private JPasswordField lblpass;
	JLabel lblConnectionInfo = new JLabel("");
	boolean isClientReturnedCorrectly = false;
	JCheckBox chckbxBenutzernameSpeichern;
	private static final String HELP_MESSAGE = "";
	Component c = null;
	String[] args = null;

	private JPanel panel;
	private JPanel panel_1;
	private JLabel LabelUser;
	private JLabel LabelPass;
	
	// radio button and group for login types.
	private ButtonGroup bgLoginType;
	private JRadioButton rdbtnBwIDM;
	private JRadioButton rdbtnDirekteVerbindung;
	private JRadioButton rdbtnMasterserver;
	// its action listener
	private ActionListener loginTypeActionListener;
	
	// bwIDM label and dropdown
	private JComboBox<String> choice;
	private JLabel lblIdp;
	
	// Satellite IP label and text field
	private JLabel lblSatellitenIp;
	private JTextField lblSatIP;

	/**
	 * Create the frame.
	 */
	public Login_GUI(String[] args) {
		addWindowListener(new WindowAdapter() {
			@Override
			public void windowClosing(WindowEvent e) {
				System.exit(0);
			}
		});

		this.args = args;
		// Fenster darf nicht vergroessert werden
		setResizable(false);

		try {
			// Setzt das Look and Feel auf System
			UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
		} catch (ClassNotFoundException | InstantiationException
				| IllegalAccessException | UnsupportedLookAndFeelException e) {
			
			e.printStackTrace();
		}
		// Titel des Fensters setzen
		setTitle("bwLehrpool Suite");
		// Aktion die beim Schliessen durchgefuehrt werden soll
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

		// Größe setzen und mittig ausrichten
		setBounds(0, 0, 785, 430);

		// Erzeugen eines Panels
		contentPane = new JPanel();
		// Hintergrund Farbe des Panels setzen
		contentPane.setBackground(SystemColor.menu);
		// Rahmen des Fensters setzen
		contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
		setContentPane(contentPane);
		// Layout setzen
		contentPane.setLayout(null);
		// Label fuer das Logo erzeugen
		JLabel imgLabel = new JLabel();
		// Groesse und Position des Logos festelegen
		imgLabel.setBounds(231, 11, 350, 142);
		// Pfadangabe des Logos

		ImageIcon icon = ResourceLoader.getIcon("/img/Logo_bwLehrpool.png",
				"Logo");
		// Skalierung des Logos
		Image scaled = icon.getImage().getScaledInstance(270, 64, 0);
		imgLabel.setIcon(new ImageIcon(scaled));
		// Hinzufuegen des Logos in das Fenster
		contentPane.add(imgLabel);

		lblConnectionInfo.setHorizontalAlignment(SwingConstants.LEFT);
		lblConnectionInfo.setBounds(10, 359, 449, 20);
		lblConnectionInfo.setEnabled(true);
		lblConnectionInfo.setText("Info: Bereit für Login");

		contentPane.add(lblConnectionInfo);

		// Erzeugen, Hinzufuegen und definierung der Aktion des Buttons
		JButton BtnLogin = new JButton("Login");
		BtnLogin.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent arg0) {
				performLogin(bgLoginType.getSelection().getActionCommand());
			}// end actionPerformed
		});

		BtnLogin.setBounds(488, 358, 239, 23);
		contentPane.add(BtnLogin);
		
		// Start of the actual content of the right panel
		panel = new JPanel();
		panel.setLayout(null);
		panel.setBorder(new TitledBorder(null, "Zugangsdaten",
						TitledBorder.LEADING, TitledBorder.TOP, null, null));
		panel.setBackground(SystemColor.menu);
		panel.setBounds(354, 143, 400, 181);
		contentPane.add(panel);
		
		chckbxBenutzernameSpeichern = new JCheckBox("Benutzername speichern");
		chckbxBenutzernameSpeichern.setBounds(135, 137, 237, 23);
		chckbxBenutzernameSpeichern.setSelected(Config.getSaveUsername());
		panel.add(chckbxBenutzernameSpeichern);
				
		// Erzeugen und Hinzufuegen des Labels
		LabelUser = new JLabel("Benutzername:");
		LabelUser.setBounds(25, 60, 82, 20);
		panel.add(LabelUser);
		
		// Erzeugen und Hinzufuegen des Textfeldes
		lblusername = new JTextField();
		lblusername.setBounds(135, 60, 237, 20);
		lblusername.setToolTipText("Bitte geben Sie Ihren bwIDM-Benutzernamen ein.");
		lblusername.setColumns(10);
		// Lese Benutzername aus der Konfigurationsdatei
		lblusername.setText(Config.getUsername());
		lblusername.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent arg0) {
				performLogin(bgLoginType.getSelection().getActionCommand());
			}
		});
		panel.add(lblusername);
		
		// Erzeugen und Hinzufuegen des Labels
		LabelPass = new JLabel("Passwort:");
		LabelPass.setBounds(25, 85, 82, 20);
		panel.add(LabelPass);
		
		// Erzeugen und Hinzufuegen des Passwortfeldes
		lblpass = new JPasswordField();
		lblpass.setBounds(135, 85, 237, 20);
		lblpass.setToolTipText("Bitte geben Sie Ihr bwIDM-Passwort ein.");
		lblpass.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				performLogin(bgLoginType.getSelection().getActionCommand());
			}
		});
		panel.add(lblpass);
		
		lblSatellitenIp = new JLabel("Satelliten IP:");
		lblSatellitenIp.setBounds(25, 105, 82, 20);
		//panel.add(lblSatellitenIp);
		
		lblSatIP = new JTextField();
		lblSatIP.setBounds(135, 110, 237, 20);
		lblSatIP.setToolTipText("Bitte geben Sie die IP-Adresse des Satelliten ein.");
		//panel.add(lblSatIP);

		String organisations[] = { "https://testidp3-dev.aai.dfn.de/idp/profile/SAML2/SOAP/ECP" };
		choice = new JComboBox<String>(organisations);
		choice.setBounds(135, 35, 237, 20);
		//panel.add(choice);
		
		lblIdp = new JLabel("IDP:");
		lblIdp.setBounds(25, 35, 82, 20);
		//panel.add(lblIdp);
	
		// action listener for the radio buttons to
		// toggle the gui elements depending on the login type
		loginTypeActionListener = new ActionListener() {
			@Override
			public void actionPerformed(ActionEvent e) {
				toggleLoginType(e.getActionCommand());
			}
		};
				
		panel_1 = new JPanel();
		panel_1.setLayout(null);
		panel_1.setBorder(new TitledBorder(
				UIManager.getBorder("TitledBorder.border"), "Zugangsart",
				TitledBorder.LEADING, TitledBorder.TOP, null, new Color(0, 0, 0)));
		panel_1.setBackground(SystemColor.menu);
		panel_1.setBounds(10, 143, 334, 181);
		contentPane.add(panel_1);
		
		// group radio button for the login type together
		bgLoginType = new ButtonGroup();
		
		rdbtnBwIDM = new JRadioButton("Zugang über bwIDM");
		rdbtnBwIDM.setBounds(32, 35, 244, 23);
		rdbtnBwIDM.setActionCommand(LOGIN_TYPE_BWIDM);
		rdbtnBwIDM.addActionListener(loginTypeActionListener);
		bgLoginType.add(rdbtnBwIDM);
		panel_1.add(rdbtnBwIDM);
		
		rdbtnMasterserver = new JRadioButton("Test-Zugang mit festem Benutzer");
		rdbtnMasterserver.setSelected(true);
		rdbtnMasterserver.setActionCommand(LOGIN_TYPE_BWLEHRPOOL);
		rdbtnMasterserver.addActionListener(loginTypeActionListener);
		rdbtnMasterserver.setBounds(32, 60, 244, 23);
		bgLoginType.add(rdbtnMasterserver);
		panel_1.add(rdbtnMasterserver);
		
		rdbtnDirekteVerbindung = new JRadioButton("Direkte Verbindung zum Satelliten");
		rdbtnDirekteVerbindung.setBounds(32, 85, 244, 23);
		rdbtnDirekteVerbindung.setActionCommand(LOGIN_TYPE_SATELLITE);
		rdbtnDirekteVerbindung.addActionListener(loginTypeActionListener);
		bgLoginType.add(rdbtnDirekteVerbindung);
		panel_1.add(rdbtnDirekteVerbindung);
		
		panel.setVisible(true);
		panel_1.setVisible(true);
		contentPane.setVisible(true);
		
		GuiOrganizer.centerGUI(this);
		c = this;
		
	}// end LoginGUI()

	// Versuche den Benutzer einzuloggen
	public void performLogin(final String loginType) {
		LOGGER.info("Trying login of type: " + loginType);

		
		if (loginType == LOGIN_TYPE_BWLEHRPOOL) {
			
			
			// start the authentication process against the masterserver
			org.openslx.imagemaster.thrift.iface.SessionData result = null;
			// Connect to Master
			MasterThriftConnection thrift = new MasterThriftConnection();
			Client client = thrift.getMasterThriftConnection();

			if (client == null) {
				// Thrift connection to master could not be established
				setStatus(Color.red, "Fehler: Masterserver nicht erreichbar.", null);
				LOGGER.info("Thrift client could not be initialized, is the masterserver up and running?");
				return;
			}

			String passText = new String(lblpass.getPassword());
			UserInfo user = null;
			// Log user in
			try {
				setStatus(Color.black,
						"Authentifiziere - warte auf Antwort von Server...", null);

				result = client.authenticate(lblusername.getText(), passText);

				// Sanity checks
				if (result.authToken == null || result.sessionId == null) {
					setStatus(Color.red, "Antwort des Masterservers korrupt.", null);
					LOGGER.info("Antwort des Masterservers korrupt");
					return;
				}

				// User-Info
				LOGGER.info("Authentifizierung von '" + lblusername.getText() + "' erfolgreich.");
				user = client.getUserFromToken(result.authToken);

			} catch (org.openslx.imagemaster.thrift.iface.AuthenticationException e) {
				setStatus(
						Color.red,
						"Fehler: Zugangsdaten nicht akzeptiert.",
						"Benutzeranmeldung fehlgeschlagen: Bitte Benutzername und Passwort überprüfen.\n"
								+ e.message);
				e.printStackTrace();
				return;
			} catch (TException e) {
				e.printStackTrace();
				setStatus(Color.red,
						"Kommunikation mit Masterserver fehlgeschlagen.",
						null);
				LOGGER.error("Thrift-communication to the masterserver failed, see trace: ", e);
				return;
			}

			// set Information
			SessionData.session.setAuthToken(result.authToken);
			SessionData.session.setSessionID(result.sessionId);
			SessionData.session.setServerAdress(result.serverAddress);

			// Satellite-Connection
			setStatus(Color.black, "Hole Verbindungsdaten von Server...", null);
			// set connection to bwLehrpoolSuiteServer
			ThriftConnection bwthrift = new ThriftConnection();
			server.generated.Server.Client bwClient = bwthrift.getThriftConnection();
			models.Client.clientcon.setClient(bwClient);

			// User-Info
			//LOGGER.debug("Session-ID: " + result.sessionId);
			//LOGGER.debug("Token: " + result.authToken);
			setStatus(Color.green, "Daten erhalten.", null);
			
			String hochschule = user.eMail.substring(user.eMail.indexOf("@") + 1);

			person.verantwortlicher.setUsername(lblusername.getText().trim());
			person.verantwortlicher.setUserID(lblusername.getText().trim());
			person.verantwortlicher.setName(user.lastName);
			person.verantwortlicher.setVorname(user.firstName);
			person.verantwortlicher.setEMail(user.eMail);
			person.verantwortlicher.setHochschule(hochschule);

			// Spaeter ueber result.getRole zum Beispiel die Rolle holen
			if(lblusername.getText().trim().startsWith("admin@")){
				person.verantwortlicher.setRole("Admin");
			} else { 
			person.verantwortlicher.setRole("Dozent");
			//person.verantwortlicher.setRole("Student");
			}
			
			showMainMenu();
			 
		//}
		} // end bwLehrpool-Login
		
		if (loginType == LOGIN_TYPE_BWIDM) {
			// try the shibbo login in its own SwingWorker to avoid GUI lockups
			SwingWorker<Boolean, String> worker = new SwingWorker<Boolean, String>(){
				@Override
				protected Boolean doInBackground() throws Exception {
					publish("Info: Initialisiere Shibboleth-Client ...");
					ShibbolethECP.init(choice.getSelectedItem().toString());
					publish("Info: Überprüfe Zugangdaten über bwIDM ...");
					return ShibbolethECP.doLogin(lblusername.getText().trim(), String.valueOf(lblpass.getPassword()));
				}
				protected void done() {
					try {
						if (get()) {
							setStatus(Color.green, "Info: bwIDM-Login erfolgreich.", null);
							// TODO: call showNextStep()
							//showMainMenu();
							JOptionPane.showMessageDialog(c, "Der Shibboleth-Login war erfolgreich! Der Rest ist noch in Entwicklung :)",
									"bwIDM-Login erfolgreich", JOptionPane.PLAIN_MESSAGE);
							// all done, show main menu
							showMainMenu();
						} else {
							setStatus(Color.red, "Fehler: bwIDM-Login fehlgeschlagen!", null);
						}
					} catch (InterruptedException e) {
						LOGGER.error("SwingWorker for ShibbolethECP got interrupted, see trace: ", e);
					} catch (ExecutionException e) {
						LOGGER.error("Execution of SwingWorker for ShibbolethECP failed, see trace: ", e);
					}
				}
				@Override
				protected void process(List<String> msgs) {
					String currentMessage = msgs.get(msgs.size()-1);
					setStatus(Color.black, currentMessage, null);
				}
			};
			worker.execute();

			// now we fake the user information for testing purposes.
			// TODO parse the response from the SP and set the correct user info
			person.verantwortlicher.setUsername(lblusername.getText().trim());
			person.verantwortlicher.setUserID(lblusername.getText().trim());
			person.verantwortlicher.setName("Joe");
			person.verantwortlicher.setVorname("B");
			person.verantwortlicher.setEMail("spam@aol.com");
			person.verantwortlicher.setHochschule("fr-test.de");
			person.verantwortlicher.setRole("Dozent");
			SessionData.session.setServerAdress("132.230.8.199");

		}

		// always save to user's config file.
		if (chckbxBenutzernameSpeichern.isSelected()) {
			Config.setUsername(lblusername.getText());
			Config.setSaveUsername(true);
		} else {
			Config.setUsername("");
			Config.setSaveUsername(false);
		}
		// save it to local disk
		Config.store();


	}// end performLogin

	/**
	 * Shows the next GUI's til the main menu.
	 * It checks if the user has already seen the bill of rights
	 * and/or the vmware license windows and shows them before
	 * continuing to the main menu.
	 *
	 * This function should be called on a successful login.
	 */
	private void showMainMenu() {

		/*
		 * TODO check if user has already been regisistered. if not, do so
		 * 
		 * 
		 */
		//import server.generated.Server.Client;
		server.generated.Server.Client client_2 = models.Client.clientcon.getClient();
		try {
			String pk_institution = client_2.setInstitution(person.verantwortlicher.getHochschule());
			//LOGGER.info("Institution of user is: "+pk_institution);
			client_2.setPerson(person.verantwortlicher.getUserID(), person.verantwortlicher.getName(), person.verantwortlicher.getVorname(), person.verantwortlicher.getEMail(), pk_institution);
			//LOGGER.info("user data, ID="+person.verantwortlicher.getUserID()+" , Name="+person.verantwortlicher.getName()+" , Vorname="+ person.verantwortlicher.getVorname()+" , E-Mail="+ person.verantwortlicher.getEMail()+" , Institution="+ pk_institution);
		} catch (TException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		
		
		// Pruefe ob Bills Of Rights schon akzeptiert wurden,
		// wenn nicht zeige diese an
		if (!Config.getBillOfRights()) {
			// Erstellen einer Instanz der Aktionsauswahl
			BillOfRights_GUI re = new BillOfRights_GUI();
			re.setVisible(true);
			// Schliessen des Fensters nach erfolgreichen Login
			setVisible(false);
		} else {
			// Pruefe ob die Links zu vmware angezeigt werden
			// sollen
			if (!Config.getVmwareLicense()) {
				VmWareLink_GUI vm = new VmWareLink_GUI();
				vm.setVisible(true);
				setVisible(false);
			} else {

				// oeffne das Hauptmenue
				MainMenue_GUI main = new MainMenue_GUI(c);
				main.setVisible(true);
				setVisible(false);
			}
		}
	}

	/**
	 * Set connection status message, optionally show message box.
	 * 
	 * @param color
	 *            Color to display status message in.
	 * @param shortMessage
	 *            The message to display.
	 * @param longMessage
	 *            Optional message to show in a message box. null means don't
	 *            show.
	 */
	private void setStatus(Color color, String shortMessage, String longMessage) {
		LOGGER.info(shortMessage);
		lblConnectionInfo.setForeground(color);
		lblConnectionInfo.setText(shortMessage);
		if (longMessage != null)
			JOptionPane.showMessageDialog(c, longMessage,
					"Anmeldung fehlgeschlagen", JOptionPane.ERROR_MESSAGE);
	}
	
	/**
	 * Toggle the elements needed for the different login types.
	 * 
	 * @param type
	 *            Type of the login to toggle. Valid are:
	 *            	- LOGIN_TYPE_BWIDM
	 *            	-	LOGIN_TYPE_BWLEHRPOOL
	 *            	- LOGIN_TYPE_SATELLITE
	 */
	private void toggleLoginType(String type) {
		LOGGER.info("Toggling to login method to: " + type);
		panel.setVisible(false);
		switch(type) {
			case LOGIN_TYPE_BWIDM:
				panel.remove(lblSatIP);
				panel.remove(lblSatellitenIp);
				panel.add(lblIdp);
				panel.add(choice);
				panel.add(LabelPass);
				lblpass.setText("");
				lblpass.setToolTipText("Bitte geben Sie Ihr bwIDM-Passwort ein.");
				panel.add(lblpass);
				lblusername.setToolTipText("Bitte geben Sie Ihr bwIDM-Benutzername ein.");
				panel.revalidate();
				panel.repaint();
				panel.setVisible(true);
				break;
			case LOGIN_TYPE_BWLEHRPOOL:
				panel.remove(choice);
				panel.remove(lblIdp);
				panel.remove(lblSatIP);
				panel.remove(lblSatellitenIp);
				panel.add(LabelPass);
				lblpass.setToolTipText("Bitte geben Sie Ihr bwLehrpool-Passwort ein.");
				panel.add(lblpass);
				lblusername.setToolTipText("Bitte geben Sie Ihr bwLehrpool-Benutzername ein.");
				panel.revalidate();
				panel.repaint();
				panel.setVisible(true);
				break;
			case LOGIN_TYPE_SATELLITE:
				panel.remove(choice);
				panel.remove(lblIdp);
				panel.remove(LabelPass);
				panel.remove(lblpass);
				lblSatIP.setBounds(135, 85, 237, 20);
				lblSatIP.setText("");
				panel.add(lblSatIP);
				lblSatellitenIp.setBounds(25, 85, 82, 20);
				panel.add(lblSatellitenIp);
				panel.revalidate();
				panel.repaint();
				panel.setVisible(true);
				break;
			default:
				LOGGER.error("Unknown action '" + type + "'. Ignoring.");
				panel.setVisible(true);
				return;
		}
		
	}
}// end class