/*
 * Copyright 2014 dorkbox, llc
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package dorkbox.systemTray.swingUI;


import java.io.File;

import javax.swing.ImageIcon;
import javax.swing.JComponent;

import dorkbox.systemTray.Checkbox;
import dorkbox.systemTray.Entry;
import dorkbox.systemTray.Menu;
import dorkbox.systemTray.MenuItem;
import dorkbox.systemTray.Separator;
import dorkbox.systemTray.SystemTray;
import dorkbox.systemTray.util.MenuHook;
import dorkbox.systemTray.util.Status;
import dorkbox.systemTray.util.SystemTrayFixes;
import dorkbox.util.SwingUtil;

// this is a weird composite class, because it must be a Menu, but ALSO a Entry -- so it has both (and duplicate code)
@SuppressWarnings("ForLoopReplaceableByForEach")
class SwingMenu implements MenuHook {

    private final SwingMenu parent;
    final JComponent _native;

    private volatile boolean hasLegitIcon = false;

    // This is NOT a copy constructor!
    @SuppressWarnings("IncompleteCopyConstructor")
    SwingMenu(final SwingMenu parent) {
        this.parent = parent;

        if (parent == null) {
            this._native = new TrayPopup();
        }
        else {
            this._native = new AdjustedJMenu();
            parent._native.add(this._native);
        }
    }

    protected final
    void dispatch(final Runnable runnable) {
        // this will properly check if we are running on the EDT
        SwingUtil.invokeLater(runnable);
    }

    protected final
    void dispatchAndWait(final Runnable runnable) {
        // this will properly check if we are running on the EDT
        try {
            SwingUtil.invokeAndWait(runnable);
        } catch (Exception e) {
            SystemTray.logger.error("Error processing event on the dispatch thread.", e);
        }
    }

    public
    boolean hasImage() {
       return hasLegitIcon;
    }

    // is overridden in tray impl
    @Override
    public
    void setImage(final MenuItem menuItem) {
        final File imageFile = menuItem.getImage();
        hasLegitIcon = imageFile != null;

        dispatch(new Runnable() {
            @Override
            public
            void run() {
                if (imageFile != null) {
                    ImageIcon origIcon = new ImageIcon(imageFile.getAbsolutePath());
                    ((AdjustedJMenu) _native).setIcon(origIcon);
                }
                else {
                    ((AdjustedJMenu) _native).setIcon(null);
                }
            }
        });
    }

    // is overridden in tray impl
    @Override
    public
    void setEnabled(final MenuItem menuItem) {
        dispatch(new Runnable() {
            @Override
            public
            void run() {
                _native.setEnabled(menuItem.getEnabled());
            }
        });
    }


    // is overridden in tray impl
    @Override
    public
    void setText(final MenuItem menuItem) {
        dispatch(new Runnable() {
            @Override
            public
            void run() {
                ((AdjustedJMenu) _native).setText(menuItem.getText());
            }
        });
    }

    @Override
    public
    void setCallback(final MenuItem menuItem) {
        // can't have a callback for menus!
    }

    // is overridden in tray impl
    @Override
    public
    void setShortcut(final MenuItem menuItem) {
        char shortcut = menuItem.getShortcut();
        // yikes...
        final int vKey = SystemTrayFixes.getVirtualKey(shortcut);

        dispatch(new Runnable() {
            @Override
            public
            void run() {
                ((AdjustedJMenu) _native).setMnemonic(vKey);
            }
        });
    }

    @Override
    public
    void add(final Menu parentMenu, final Entry entry, final int index) {
        // must always be called on the EDT
        dispatch(new Runnable() {
            @Override
            public
            void run() {
                if (entry instanceof Menu) {
                    SwingMenu swingMenu = new SwingMenu(SwingMenu.this);
                    ((Menu) entry).bind(swingMenu, parentMenu, parentMenu.getSystemTray());
                }
                else if (entry instanceof Separator) {
                    SwingMenuItemSeparator swingEntrySeparator = new SwingMenuItemSeparator(SwingMenu.this);
                    entry.bind(swingEntrySeparator, parentMenu, parentMenu.getSystemTray());
                }
                else if (entry instanceof Checkbox) {
                    SwingMenuItemCheckbox swingEntryCheckbox = new SwingMenuItemCheckbox(SwingMenu.this);
                    ((Checkbox) entry).bind(swingEntryCheckbox, parentMenu, parentMenu.getSystemTray());
                }
                else if (entry instanceof Status) {
                    SwingMenuItemStatus swingEntryStatus = new SwingMenuItemStatus(SwingMenu.this);
                    ((Status) entry).bind(swingEntryStatus, parentMenu, parentMenu.getSystemTray());
                }
                else if (entry instanceof MenuItem) {
                    SwingMenuItem swingMenuItem = new SwingMenuItem(SwingMenu.this);
                    ((MenuItem) entry).bind(swingMenuItem, parentMenu, parentMenu.getSystemTray());
                }
            }
        });
    }

    /**
     *  This removes all menu entries from this menu AND this menu from it's parent
     */
    @Override
    public synchronized
    void remove() {
       dispatch(new Runnable() {
            @Override
            public
            void run() {
                _native.setVisible(false);
                _native.removeAll();

                if (parent != null) {
                    parent._native.remove(_native);
                } else {
                    // have to dispose of the tray popup hidden frame, otherwise the app will never close (because this will hold it open)
                    ((TrayPopup) _native).close();
                }
            }
        });
    }
}