package org.cyberdeck.client.state;

import java.util.prefs.Preferences;

import org.cyberdeck.client.GameClient;
import org.cyberdeck.client.SessionInfo;
import org.cyberdeck.client.net.XmlRpcClient;
import org.cyberdeck.client.ui.GameGUI;
import org.cyberdeck.client.ui.layout.CancelAccept;
import org.cyberdeck.client.ui.layout.VideoSettings;
import org.cyberdeck.client.ui.widget.LoginPane;
import org.cyberdeck.common.interfaces.Authenticator;
import org.cyberdeck.common.util.Password;
import org.cyberdeck.common.util.XmlRpcStatus;
import org.lwjgl.opengl.Display;
import org.lwjgl.opengl.DisplayMode;
import org.lwjgl.input.Keyboard;
import org.newdawn.slick.GameContainer;
import org.newdawn.slick.Graphics;
import org.newdawn.slick.SlickException;
import org.newdawn.slick.state.BasicGameState;
import org.newdawn.slick.state.StateBasedGame;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import redstone.xmlrpc.XmlRpcException;
import redstone.xmlrpc.XmlRpcFault;

import de.matthiasmann.twl.Button;
import de.matthiasmann.twl.CallbackWithReason;
import de.matthiasmann.twl.DialogLayout;
import de.matthiasmann.twl.EditField;
import de.matthiasmann.twl.Label;
import de.matthiasmann.twl.PopupWindow;
import de.matthiasmann.twl.DialogLayout.Group;
import de.matthiasmann.twl.EditField.Callback;

public class LoginState extends BasicGameState {

    private static Logger log = LoggerFactory.getLogger(LoginState.class);

    int stateID = -1;
    private GameGUI gui;
    private LoginPane root = new LoginPane();
    private Preferences prefs;
    protected final DisplayMode desktopMode;
    protected VideoSettings.CallbackReason vidDlgCloseReason;
    protected boolean closeRequested;

    private boolean loginRequested = false;
    private boolean focusRequested = false;
    private boolean forceLogin = false;
    private boolean openLoginPopup = false;

    private EditField cUsername;
    private EditField cPassword;
    private Button bLogin;
    private PopupWindow forceLoginDlg;

    public LoginState(int stateID, GameGUI gui) {
        this.stateID = stateID;
        this.gui = gui;
        desktopMode = Display.getDesktopDisplayMode();
        prefs = Preferences.userNodeForPackage(GameClient.class);
    }

    @Override
    public int getID() {
        return this.stateID;
    }

    @Override
    public void init(GameContainer gc, StateBasedGame game)
    throws SlickException {
        final PopupWindow settingsDlg = new PopupWindow(root);
        final VideoSettings settings = new VideoSettings(
                Preferences.userNodeForPackage(GameClient.class),
                desktopMode);
        settingsDlg.setTheme("settingdialog");
        settingsDlg.add(settings);
        settingsDlg.setCloseOnClickedOutside(false);
        settings.setTheme("settings");
        settings.addCallback(new CallbackWithReason<VideoSettings.CallbackReason>() {
            public void callback(VideoSettings.CallbackReason reason) {
                vidDlgCloseReason = reason;
                settingsDlg.closePopup();
                if (reason == VideoSettings.CallbackReason.ACCEPT) {
                    settings.storeSettings();
                }
            }
        });
        root.addButton("Settings", "Opens a dialog which might be used to change video settings", new Runnable() {
            public void run() {
                settings.readSettings();
                settingsDlg.openPopupCentered();
            }
        });

        root.addButton("Exit", new Runnable() {
            public void run() {
                closeRequested = true;
            }
        });

        Label lUsername = new Label("Username");
        lUsername.setTheme("/loginpane.fpscounter");
        Label lPassword = new Label("Password");
        lPassword.setTheme("/loginpane.fpscounter");
        cUsername = new EditField();
        cUsername.setText(prefs.get("prevUsername", ""));
        cPassword = new EditField();
        cPassword.setPasswordMasking(true);
        bLogin = new Button("Login");
        bLogin.setTheme("/button");
        bLogin.addCallback(new Runnable() {
            public void run() {
                loginRequested = true;
            }
        });
        cUsername.addCallback(new Callback() {
            public void callback(int key) {
                if (key == Keyboard.KEY_RETURN) {
                    if (cPassword.getTextLength()>0) {
                        loginRequested = true;
                    } else {
                        cPassword.requestKeyboardFocus();
                    }
                }
            }
        });
        cPassword.addCallback(new Callback() {
            public void callback(int key) {
                if (key == Keyboard.KEY_RETURN) {
                    if (cPassword.getTextLength()>0) {
                        loginRequested = true;
                    }
                }
            }
        });
        bLogin.setTooltipContent("Login to the game");

        forceLoginDlg = new PopupWindow(root);
        final CancelAccept cxlAccept = new CancelAccept("This account is already logged in.\n\nDo you wish to disconnect the existing session and login?");
        forceLoginDlg.setTheme("settingdialog");
        forceLoginDlg.add(cxlAccept);
        forceLoginDlg.setCloseOnClickedOutside(false);
        cxlAccept.setTheme("settings");
        cxlAccept.addCallback(new CallbackWithReason<CancelAccept.CallbackReason>() {
            public void callback(CancelAccept.CallbackReason reason) {
                log.info("in cxlAccept callback.  CallbackReason = "+reason.toString());
                forceLoginDlg.closePopup();
                if (reason == CancelAccept.CallbackReason.ACCEPT) {
                    forceLogin = true;
                    loginRequested = true;
                } else {
                    forceLogin = false;
                    loginRequested = false;
                    cPassword.setText("");
                    cPassword.requestKeyboardFocus();
                    cUsername.setEnabled(true);
                    cPassword.setEnabled(true);
                    bLogin.setEnabled(true);
                }
            }
        });


        root.setStatus("Please enter your username and password to login");
        DialogLayout layout = root.getLayout();

        Group ghLabels = layout.createParallelGroup().addWidget(lUsername).addWidget(lPassword);
        Group ghControls = layout.createParallelGroup().addWidget(cUsername).addWidget(cPassword).addGap(100);
        Group vRowA = layout.createParallelGroup().addWidget(lUsername).addWidget(cUsername);
        Group vRowB = layout.createParallelGroup().addWidget(lPassword).addWidget(cPassword);
        layout.setHorizontalGroup(layout.createParallelGroup().
                addGroup(layout.createSequentialGroup().addGroup(ghLabels).addGroup(ghControls)).
                addGroup(layout.createSequentialGroup().addGap().addWidget(bLogin).addGap()));
        layout.setVerticalGroup(layout.createSequentialGroup().
                addGroup(layout.createSequentialGroup().addGroup(vRowA).addGroup(vRowB)).
                addGap(DialogLayout.MEDIUM_GAP, DialogLayout.MEDIUM_GAP, Short.MAX_VALUE).
                addGroup(layout.createParallelGroup().addWidget(bLogin)));
    }

    @Override
    public void render(GameContainer container, StateBasedGame game, Graphics g)
    throws SlickException {
        gui.update();
        if (openLoginPopup) {
            forceLoginDlg.openPopupCentered();
            openLoginPopup = false;
        }
    }

    @Override
    public void update(GameContainer container, StateBasedGame game, int delta)
    throws SlickException {
        // if we've accepted new display settings, apply them
        if (vidDlgCloseReason == VideoSettings.CallbackReason.ACCEPT) {
            gui.reload(container);
        }
        vidDlgCloseReason = null;

        // if the exit button has been clicked, exit...
        if (closeRequested) {
            container.exit();
        }

        if (loginRequested) {
            // ignore login requests if password field is empty
            if (cPassword.getTextLength()<1) {
                loginRequested = false;
            } else {
                cUsername.setEnabled(false);
                cPassword.setEnabled(false);
                bLogin.setEnabled(false);
                prefs.put("prevUsername", cUsername.getText());
                root.setStatus("Logging in to server...");
                Authenticator auth = (Authenticator)XmlRpcClient.get().createProxy(Authenticator.class);
                String result = null;
                try {
                    result = auth.login(cUsername.getText(), Password.hash(cPassword.getText()), forceLogin);
                } catch (XmlRpcException e) {
                    root.setStatus(e.getMessage());
                    cPassword.setText("");
                    cPassword.requestKeyboardFocus();
                } catch (XmlRpcFault e) {
                    try {
                        if (e.getErrorCode() == XmlRpcStatus.SESSIONEXISTS) {
                            openLoginPopup = true;
                        }
                        root.setStatus(XmlRpcStatus.getMessage(e.getErrorCode()));
                    } catch (Exception e1) {
                        root.setStatus(e1.getMessage());
                    }
                    if (!openLoginPopup) {
                        cPassword.setText("");
                        cPassword.requestKeyboardFocus();
                    }
                }
                if (result != null) {
                    root.setStatus("Authentication accepted, entering game...");
                    SessionInfo.get().setSessionId(result);
                    game.enterState(GameClient.PLAYSTATE);
                }
                if (!openLoginPopup) {
                    cUsername.setEnabled(true);
                    cPassword.setEnabled(true);
                    bLogin.setEnabled(true);
                }
                loginRequested = false;
            }
        }

        if (!focusRequested) {
            if (cUsername.getTextLength()>0) {
                cPassword.requestKeyboardFocus();
            } else {
                cUsername.requestKeyboardFocus();
            }
            focusRequested = true;
        }
    }

    @Override
    public void enter(GameContainer container, StateBasedGame game) throws SlickException {
        gui.setRoot(root);
    }
}