package the.bytecode.club.bytecodeviewer.gui;

import java.awt.BorderLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.util.regex.Pattern;
import java.util.regex.PatternSyntaxException;

import javax.swing.DefaultComboBoxModel;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JComboBox;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTree;
import javax.swing.event.TreeSelectionEvent;
import javax.swing.event.TreeSelectionListener;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.TreePath;

import org.objectweb.asm.tree.ClassNode;

import the.bytecode.club.bytecodeviewer.*;
import the.bytecode.club.bytecodeviewer.searching.*;

/***************************************************************************
 * Bytecode Viewer (BCV) - Java & Android Reverse Engineering Suite        *
 * Copyright (C) 2014 Kalen 'Konloch' Kinloch - http://bytecodeviewer.com  *
 *                                                                         *
 * This program is free software: you can redistribute it and/or modify    *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation, either version 3 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 *   This program 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 for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program.  If not, see <http://www.gnu.org/licenses/>. *
 ***************************************************************************/

/**
 * A pane dedicating to searching the loaded files.
 *
 * @author Konloch
 * @author WaterWolf
 */

@SuppressWarnings("rawtypes")
public class SearchingPane extends VisibleComponent {

    private static final long serialVersionUID = -1098524689236993932L;

    FileChangeNotifier fcn;

    JCheckBox exact = new JCheckBox("Exact");
    DefaultMutableTreeNode treeRoot = new DefaultMutableTreeNode("Root");
    JTree tree;

    SearchType searchType = null;
    JComboBox searchRadiusBox;

    public JButton search = new JButton("Search");
    BackgroundSearchThread t = new BackgroundSearchThread(true) {
        @Override
        public void doSearch() {
            // empty
        }

    };

    @SuppressWarnings("unchecked")
    public SearchingPane(final FileChangeNotifier fcn) {
        super("Search");

        this.fcn = fcn;

        final JPanel optionPanel = new JPanel(new BorderLayout());

        final JPanel searchRadiusOpt = new JPanel(new BorderLayout());

        final JPanel searchOpts = new JPanel(new GridLayout(2, 1));

        searchRadiusOpt.add(new JLabel("Search from "), BorderLayout.WEST);

        DefaultComboBoxModel model = new DefaultComboBoxModel();
        for (final SearchRadius st : SearchRadius.values()) {
            model.addElement(st);
        }

        searchRadiusBox = new JComboBox(model);

        searchRadiusOpt.add(searchRadiusBox, BorderLayout.CENTER);

        searchOpts.add(searchRadiusOpt);

        model = new DefaultComboBoxModel();
        for (final SearchType st : SearchType.values()) {
            model.addElement(st);
        }

        final JComboBox typeBox = new JComboBox(model);
        final JPanel searchOptPanel = new JPanel();

        final ItemListener il = new ItemListener() {
            @Override
            public void itemStateChanged(final ItemEvent arg0) {
                searchOptPanel.removeAll();
                searchType = (SearchType) typeBox.getSelectedItem();
                searchOptPanel.add(searchType.details.getPanel());

                searchOptPanel.revalidate();
                searchOptPanel.repaint();
            }
        };

        typeBox.addItemListener(il);

        typeBox.setSelectedItem(SearchType.LDC);
        il.itemStateChanged(null);

        searchOpts.add(typeBox);

        optionPanel.add(searchOpts, BorderLayout.NORTH);

        JPanel p2 = new JPanel();
        p2.setLayout(new BorderLayout());
        p2.add(searchOptPanel, BorderLayout.NORTH);
        p2.add(exact, BorderLayout.SOUTH);

        optionPanel.add(p2, BorderLayout.CENTER);

        search.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(final ActionEvent arg0) {
                treeRoot.removeAllChildren();
                searchType = (SearchType) typeBox.getSelectedItem();
                final SearchRadius radius = (SearchRadius) searchRadiusBox
                        .getSelectedItem();
                final SearchResultNotifier srn = new SearchResultNotifier() {
                    @Override
                    public void notifyOfResult(String debug) {
                        treeRoot.add(new DefaultMutableTreeNode(debug));
                    }
                };
                if (radius == SearchRadius.All_Classes) {
                    if (t.finished) {
                        t = new BackgroundSearchThread() {
                            @Override
                            public void doSearch() {

                                try {
                                    Pattern.compile(RegexInsnFinder.processRegex(RegexSearch.searchText.getText()), Pattern.MULTILINE);
                                } catch (PatternSyntaxException ex) {
                                    BytecodeViewer.showMessage("You have an error in your regex syntax.");
                                }

                                for (ClassNode cln : BytecodeViewer.getLoadedClasses())
                                    searchType.details.search(cln, srn, exact.isSelected());

                                MainViewerGUI.getComponent(SearchingPane.class).search.setEnabled(true);
                                MainViewerGUI.getComponent(SearchingPane.class).search.setText("Search");
                                tree.expandPath(new TreePath(tree.getModel().getRoot()));
                                tree.updateUI();
                            }

                        };
                        MainViewerGUI.getComponent(SearchingPane.class).search
                                .setEnabled(false);
                        MainViewerGUI.getComponent(SearchingPane.class).search
                                .setText("Searching, please wait..");
                        t.start();
                    } else { // this should really never be called.
                        BytecodeViewer
                                .showMessage("You currently have a search performing in the background, please wait for that to finish.");
                    }
                } else if (radius == SearchRadius.Current_Class) {
                    final Viewer cv = MainViewerGUI.getComponent(WorkPane.class).getCurrentViewer();
                    if (cv != null) {
                        searchType.details.search(cv.cn, srn,
                                exact.isSelected());
                    }
                }
            }
        });

        optionPanel.add(search, BorderLayout.SOUTH);

        this.tree = new JTree(treeRoot);

        getContentPane().setLayout(new BorderLayout());

        getContentPane().add(new JScrollPane(optionPanel), BorderLayout.NORTH);
        getContentPane().add(new JScrollPane(tree), BorderLayout.CENTER);

        this.tree.addTreeSelectionListener(new TreeSelectionListener() {
            @Override
            public void valueChanged(final TreeSelectionEvent arg0) {
                String path = arg0.getPath().toString();

                String className = path.split(", ")[1].split("\\.")[0];
                final ClassNode fN = BytecodeViewer.getClassNode(className);
                if (fN != null) {
                    MainViewerGUI.getComponent(FileNavigationPane.class)
                            .openClassFileToWorkSpace(className + ".class", fN);
                }

                System.out.println(className);
            }
        });

        this.setVisible(true);

    }

    public enum SearchType {
        LDC(new LDCSearch()), Regex(new RegexSearch()), MethodCall(
                new MethodCallSearch()), FieldCall(new FieldCallSearch());

        public final SearchTypeDetails details;

        SearchType(final SearchTypeDetails details) {
            this.details = details;
        }
    }

    public enum SearchRadius {
        All_Classes, Current_Class;
    }

    public void resetWorkspace() {
        treeRoot.removeAllChildren();
        tree.updateUI();
    }

    @Override
    public void openFile(String name, byte[] contents) {
    }
}