/*
 * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 *
 */
package com.oracle.graal.visualizer.outline;

import com.oracle.graal.visualizer.outline.server.Server;
import com.oracle.graal.visualizer.outline.server.ServerPanel;
import com.sun.hotspot.igv.data.GraphDocument;
import java.awt.BorderLayout;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;
import javax.swing.Action;
import javax.swing.UIManager;
import javax.swing.border.Border;
import org.openide.ErrorManager;
import org.openide.actions.GarbageCollectAction;
import org.openide.awt.Toolbar;
import org.openide.explorer.ExplorerManager;
import org.openide.explorer.ExplorerUtils;
import org.openide.explorer.view.BeanTreeView;
import org.openide.util.ContextAwareAction;
import org.openide.util.LookupEvent;
import org.openide.util.LookupListener;
import org.openide.util.NbBundle;
import org.openide.util.lookup.Lookups;
import org.openide.windows.TopComponent;
import org.openide.windows.WindowManager;

public final class OutlineTopComponent extends TopComponent implements ExplorerManager.Provider, LookupListener {

    public static final String GLOBAL_ACTIONS_FOLDER = "Actions/Outline/Global";
    public static final String NODE_ACTIONS_FOLDER = "Actions/Outline/Nodes";
    public static OutlineTopComponent instance;
    public static final String PREFERRED_ID = "OutlineTopComponent";
    private ExplorerManager manager;
    private GraphDocument document;
    private Server server;

    private OutlineTopComponent() {
        initComponents();

        setName(NbBundle.getMessage(OutlineTopComponent.class, "CTL_OutlineTopComponent"));
        setToolTipText(NbBundle.getMessage(OutlineTopComponent.class, "HINT_OutlineTopComponent"));

        document = new GraphDocument();
        initListView();
        initToolbar();
    }

    private void initListView() {
        manager = new ExplorerManager();
        manager.setRootContext(new CompilationNode(document));
        ((BeanTreeView) this.treeView).setRootVisible(false);
        associateLookup(ExplorerUtils.createLookup(manager, getActionMap()));
    }

    private void initToolbar() {

        Toolbar toolbar = new Toolbar();
        Border b = (Border) UIManager.get("Nb.Editor.Toolbar.border"); //NOI18N
        toolbar.setBorder(b);
        this.add(toolbar, BorderLayout.NORTH);
        for (Action a : lookupActions(GLOBAL_ACTIONS_FOLDER)) {
            toolbar.add(a);
        }
        toolbar.add(GarbageCollectAction.get(GarbageCollectAction.class).getToolbarPresenter());
        toolbar.add(new ServerPanel(getDocument()));
    }
    
    private List<Action> lookupActions(String path) {
        List<Action> actions = new ArrayList<>();
        for (Action a : Lookups.forPath(path).lookupAll(Action.class)) {
            Action newAction = a;
            if (a instanceof ContextAwareAction) {
                newAction = ((ContextAwareAction) a).createContextAwareInstance(getLookup());
            }
            newAction.putValue(Action.SHORT_DESCRIPTION, newAction.getValue(Action.NAME));
            actions.add(newAction);
            
        }
        return actions;
    }

    public void clear() {
        document.clear();
    }

    @Override
    public ExplorerManager getExplorerManager() {
        return manager;
    }

    public GraphDocument getDocument() {
        return document;
    }

    /**
     * Gets default instance. Do not use directly: reserved for *.settings files
     * only, i.e. deserialization routines; otherwise you could get a
     * non-deserialized instance. To obtain the singleton instance, use {@link findInstance}.
     */
    public static synchronized OutlineTopComponent getDefault() {
        if (instance == null) {
            instance = new OutlineTopComponent();
        }
        return instance;
    }

    /**
     * Obtain the OutlineTopComponent instance. Never call {@link #getDefault}
     * directly!
     */
    public static synchronized OutlineTopComponent findInstance() {
        TopComponent win = WindowManager.getDefault().findTopComponent(PREFERRED_ID);
        if (win == null) {
            ErrorManager.getDefault().log(ErrorManager.WARNING, "Cannot find Outline component. It will not be located properly in the window system.");
            return getDefault();
        }
        if (win instanceof OutlineTopComponent) {
            return (OutlineTopComponent) win;
        }
        ErrorManager.getDefault().log(ErrorManager.WARNING, "There seem to be multiple components with the '" + PREFERRED_ID + "' ID. That is a potential source of errors and unexpected behavior.");
        return getDefault();
    }

    @Override
    public int getPersistenceType() {
        return TopComponent.PERSISTENCE_ALWAYS;
    }

    @Override
    public void componentOpened() {
        this.requestActive();
    }

    @Override
    public void componentClosed() {
    }

    @Override
    protected String preferredID() {
        return PREFERRED_ID;
    }

    @Override
    public void requestActive() {
        super.requestActive();
        treeView.requestFocus();
    }

    @Override
    public boolean requestFocus(boolean temporary) {
        treeView.requestFocus();
        return super.requestFocus(temporary);
    }

    @Override
    protected boolean requestFocusInWindow(boolean temporary) {
        treeView.requestFocus();
        return super.requestFocusInWindow(temporary);
    }

    @Override
    public void resultChanged(LookupEvent lookupEvent) {
    }

    @Override
    public void readExternal(ObjectInput objectInput) throws IOException, ClassNotFoundException {
        // Not called when user starts application for the first time
        super.readExternal(objectInput);
        ((BeanTreeView) this.treeView).setRootVisible(false);
    }

    @Override
    public void writeExternal(ObjectOutput objectOutput) throws IOException {
        super.writeExternal(objectOutput);
    }

    static final class ResolvableHelper implements Serializable {

        private static final long serialVersionUID = 1L;

        public Object readResolve() {
            return OutlineTopComponent.getDefault();
        }
    }

    /**
     * This method is called from within the constructor to initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is always
     * regenerated by the Form Editor.
     */
    // <editor-fold defaultstate="collapsed" desc="Generated Code">//GEN-BEGIN:initComponents
    private void initComponents() {

        treeView = new BeanTreeView();

        setLayout(new java.awt.BorderLayout());
        add(treeView, java.awt.BorderLayout.CENTER);
    }// </editor-fold>//GEN-END:initComponents
    // Variables declaration - do not modify//GEN-BEGIN:variables
    private javax.swing.JScrollPane treeView;
    // End of variables declaration//GEN-END:variables
}