/*******************************************************************************
 * Copyright (c) 2015 Jeff Martin.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the GNU Lesser General Public
 * License v3.0 which accompanies this distribution, and is available at
 * http://www.gnu.org/licenses/lgpl.html
 * <p>
 * Contributors:
 * Jeff Martin - initial API and implementation
 ******************************************************************************/
package cuchaz.enigma.utils;

import com.google.common.io.CharStreams;

import java.awt.Desktop;
import java.awt.Font;
import java.awt.Rectangle;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseEvent;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.Arrays;

import javax.swing.*;
import javax.swing.text.BadLocationException;
import javax.swing.text.Highlighter;

import cuchaz.enigma.analysis.Token;

public class Utils {

    public static int combineHashesOrdered(Object... objs) {
        return combineHashesOrdered(Arrays.asList(objs));
    }

    public static int combineHashesOrdered(Iterable<Object> objs) {
        final int prime = 67;
        int result = 1;
        for (Object obj : objs) {
            result *= prime;
            if (obj != null) {
                result += obj.hashCode();
            }
        }
        return result;
    }

    public static String readStreamToString(InputStream in) throws IOException {
        return CharStreams.toString(new InputStreamReader(in, "UTF-8"));
    }

    public static String readResourceToString(String path) throws IOException {
        InputStream in = Utils.class.getResourceAsStream(path);
        if (in == null) {
            throw new IllegalArgumentException("Resource not found! " + path);
        }
        return readStreamToString(in);
    }

    public static void openUrl(String url) {
        if (Desktop.isDesktopSupported()) {
            Desktop desktop = Desktop.getDesktop();
            try {
                desktop.browse(new URI(url));
            } catch (IOException ex) {
                throw new Error(ex);
            } catch (URISyntaxException ex) {
                throw new IllegalArgumentException(ex);
            }
        }
    }

    public static JLabel unboldLabel(JLabel label) {
        Font font = label.getFont();
        label.setFont(font.deriveFont(font.getStyle() & ~Font.BOLD));
        return label;
    }

    public static void showToolTipNow(JComponent component) {
        // HACKHACK: trick the tooltip manager into showing the tooltip right now
        ToolTipManager manager = ToolTipManager.sharedInstance();
        int oldDelay = manager.getInitialDelay();
        manager.setInitialDelay(0);
        manager.mouseMoved(new MouseEvent(component, MouseEvent.MOUSE_MOVED, System.currentTimeMillis(), 0, 0, 0, 0, false));
        manager.setInitialDelay(oldDelay);
    }

    public static void navigateToToken(final JEditorPane editor, final Token token, final Highlighter.HighlightPainter highlightPainter) {

        // set the caret position to the token
        editor.setCaretPosition(token.start);
        editor.grabFocus();

        try {
            // make sure the token is visible in the scroll window
            Rectangle start = editor.modelToView(token.start);
            Rectangle end = editor.modelToView(token.end);
            final Rectangle show = start.union(end);
            show.grow(start.width * 10, start.height * 6);
            SwingUtilities.invokeLater(() -> editor.scrollRectToVisible(show));
        } catch (BadLocationException ex) {
            throw new Error(ex);
        }

        // highlight the token momentarily
        final Timer timer = new Timer(200, new ActionListener() {
            private int m_counter = 0;
            private Object m_highlight = null;

            @Override
            public void actionPerformed(ActionEvent event) {
                if (m_counter % 2 == 0) {
                    try {
                        m_highlight = editor.getHighlighter().addHighlight(token.start, token.end, highlightPainter);
                    } catch (BadLocationException ex) {
                        // don't care
                    }
                } else if (m_highlight != null) {
                    editor.getHighlighter().removeHighlight(m_highlight);
                }

                if (m_counter++ > 6) {
                    Timer timer = (Timer) event.getSource();
                    timer.stop();
                }
            }
        });
        timer.start();
    }
}