package davmail.tray;

import davmail.Settings;
import davmail.SettingsFrame;
import org.apache.log4j.Logger;
import org.apache.log4j.Priority;
import org.apache.log4j.lf5.LF5Appender;
import org.apache.log4j.lf5.LogLevel;
import org.apache.log4j.lf5.viewer.LogBrokerMonitor;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.widgets.*;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Menu;
import org.eclipse.swt.widgets.MenuItem;

import javax.swing.*;
import java.awt.*;
import java.io.IOException;
import java.net.URL;

/**
 * Tray icon handler based on SWT
 */
public class SwtGatewayTray implements DavGatewayTrayInterface {
    protected SwtGatewayTray() {
    }

    // LOCK for synchronized block
    protected static final Object LOCK = new Object();

    private static TrayItem trayItem = null;
    private static Image image = null;
    private static Image image2 = null;
    private static Display display;
    private static Shell shell;

    public void switchIcon() {
        display.syncExec(
                new Runnable() {
                    public void run() {
                        if (trayItem.getImage() == image) {
                            trayItem.setImage(image2);
                        } else {
                            trayItem.setImage(image);
                        }
                    }
                });

    }

    public void resetIcon() {
        display.syncExec(
                new Runnable() {
                    public void run() {
                        trayItem.setImage(image);
                    }
                });
    }

    public void displayMessage(final String message, final Priority priority) {
        synchronized (LOCK) {
            if (trayItem != null) {
                display.syncExec(
                        new Runnable() {
                            public void run() {
                                int messageType = 0;
                                if (priority == Priority.INFO) {
                                    messageType = SWT.ICON_INFORMATION;
                                } else if (priority == Priority.WARN) {
                                    messageType = SWT.ICON_WARNING;
                                } else if (priority == Priority.ERROR) {
                                    messageType = SWT.ICON_ERROR;
                                }
                                if (messageType == 0) {
                                    trayItem.setToolTipText("DavMail gateway \n" + message);
                                } else {
                                    final ToolTip toolTip = new ToolTip(shell, SWT.BALLOON | messageType);
                                    toolTip.setText("DavMail gateway");
                                    toolTip.setMessage(message);
                                    trayItem.setToolTip(toolTip);
                                    toolTip.setVisible(true);
                                }
                            }
                        });
            }
        }

    }

    public void init() {
        // set native look and feel
        try {
            String lafClassName = UIManager.getSystemLookAndFeelClassName();
            // workaround for bug when SWT and AWT both try to access Gtk
            if (lafClassName.indexOf("gtk") > 0) {
                lafClassName = UIManager.getCrossPlatformLookAndFeelClassName();
            }
            UIManager.setLookAndFeel(lafClassName);
        } catch (Exception e) {
            DavGatewayTray.warn("Unable to set look and feel");
        }

        new Thread() {
            public void run() {
                display = new Display();
                shell = new Shell(display);

                final Tray tray = display.getSystemTray();
                if (tray != null) {

                    trayItem = new TrayItem(tray, SWT.NONE);
                    trayItem.setToolTipText("DavMail gateway");

                    // load an image
                    ClassLoader classloader = DavGatewayTray.class.getClassLoader();
                    java.awt.Image awtImage = null;
                    try {
                        URL imageUrl = classloader.getResource("tray.png");
                        image = new Image(display, imageUrl.openStream());
                        awtImage = Toolkit.getDefaultToolkit().getImage(imageUrl);
                    } catch (IOException e) {
                        DavGatewayTray.warn("Unable to load image", e);
                    }

                    try {
                        URL imageUrl2 = classloader.getResource("tray2.png");
                        image2 = new Image(display, imageUrl2.openStream());
                    } catch (IOException e) {
                        DavGatewayTray.warn("Unable to load image", e);
                    }

                    trayItem.setImage(image);

                    // create a popup menu
                    final Menu popup = new Menu(shell, SWT.POP_UP);
                    trayItem.addListener(SWT.MenuDetect, new Listener() {
                        public void handleEvent(Event event) {
                            display.asyncExec(
                                    new Runnable() {
                                        public void run() {
                                            popup.setVisible(true);
                                        }
                                    });
                        }
                    });

                    final SettingsFrame settingsFrame = new SettingsFrame();
                    if (awtImage != null) {
                        settingsFrame.setIconImage(awtImage);
                    }
                    trayItem.addListener(SWT.DefaultSelection, new Listener() {
                        public void handleEvent(Event event) {
                            display.asyncExec(
                                    new Runnable() {
                                        public void run() {
                                            settingsFrame.setVisible(true);
                                        }
                                    });
                        }
                    });

                    // create menu item for the default action
                    MenuItem defaultItem = new MenuItem(popup, SWT.PUSH);
                    defaultItem.setText("Settings...");
                    defaultItem.addListener(SWT.Selection, new Listener() {
                        public void handleEvent(Event event) {
                            display.asyncExec(
                                    new Runnable() {
                                        public void run() {
                                            settingsFrame.setVisible(true);
                                        }
                                    });
                        }
                    });

                    MenuItem logItem = new MenuItem(popup, SWT.PUSH);
                    logItem.setText("Show logs...");
                    logItem.addListener(SWT.Selection, new Listener() {
                        public void handleEvent(Event event) {
                            display.asyncExec(
                                    new Runnable() {
                                        public void run() {

                                            Logger rootLogger = Logger.getRootLogger();
                                            LF5Appender lf5Appender = (LF5Appender) rootLogger.getAppender("LF5Appender");
                                            if (lf5Appender == null) {
                                                lf5Appender = new LF5Appender(new LogBrokerMonitor(LogLevel.getLog4JLevels()) {
                                                    protected void closeAfterConfirm() {
                                                        hide();
                                                    }
                                                });
                                                lf5Appender.setName("LF5Appender");
                                                rootLogger.addAppender(lf5Appender);
                                            }
                                            lf5Appender.getLogBrokerMonitor().show();
                                        }
                                    });
                        }
                    });

                    MenuItem exitItem = new MenuItem(popup, SWT.PUSH);
                    exitItem.setText("Exit");
                    exitItem.addListener(SWT.Selection, new Listener() {
                        public void handleEvent(Event event) {
                            shell.dispose();

                            if (image != null)
                                image.dispose();
                            if (image2 != null)
                                image2.dispose();
                            display.dispose();

                            //noinspection CallToSystemExit
                            System.exit(0);
                        }
                    });

                    // display settings frame on first start
                    if (Settings.isFirstStart()) {
                        settingsFrame.setVisible(true);
                    }

                    while (!shell.isDisposed()) {
                        if (!display.readAndDispatch())
                            display.sleep();
                    }

                    if (image != null)
                        image.dispose();
                    if (image2 != null)
                        image2.dispose();
                    display.dispose();
                }
            }
        }.start();
    }

}