// License: GPL. For details, see LICENSE file.
package org.openstreetmap.josm.actions;

import static org.openstreetmap.josm.gui.help.HelpUtil.ht;
import static org.openstreetmap.josm.tools.I18n.tr;

import java.awt.Dimension;
import java.awt.Toolkit;
import java.awt.datatransfer.Clipboard;
import java.awt.datatransfer.ClipboardOwner;
import java.awt.datatransfer.StringSelection;
import java.awt.datatransfer.Transferable;
import java.awt.event.ActionEvent;
import java.awt.event.KeyEvent;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;

import javax.swing.JScrollPane;
import javax.swing.JTextArea;

import org.openstreetmap.josm.Main;
import org.openstreetmap.josm.data.Version;
import org.openstreetmap.josm.data.osm.DataSet;
import org.openstreetmap.josm.data.osm.DatasetConsistencyTest;
import org.openstreetmap.josm.gui.ExtendedDialog;
import org.openstreetmap.josm.plugins.PluginHandler;
import org.openstreetmap.josm.tools.Shortcut;

/**
 * @author xeen
 *
 * Opens a dialog with useful status information like version numbers for Java, JOSM and plugins
 * Also includes preferences with stripped username and password
 */
public final class ShowStatusReportAction extends JosmAction {
    public ShowStatusReportAction() {
        super(
                tr("Show Status Report"),
                "clock",
                tr("Show status report with useful information that can be attached to bugs"),
                Shortcut.registerShortcut("help:showstatusreport", tr("Help: {0}",
                        tr("Show Status Report")), KeyEvent.VK_R, Shortcut.GROUP_NONE), true);

        putValue("help", ht("/Action/ShowStatusReport"));
    }

    public static String getReportHeader()
    {
        StringBuilder text = new StringBuilder();
        text.append(Version.getInstance().getReleaseAttributes());
        text.append("\n");
        text.append("Memory Usage: ");
        text.append(Runtime.getRuntime().totalMemory()/1024/1024);
        text.append(" MB / ");
        text.append(Runtime.getRuntime().maxMemory()/1024/1024);
        text.append(" MB (");
        text.append(Runtime.getRuntime().freeMemory()/1024/1024);
        text.append(" MB allocated, but free)");
        text.append("\n");
        text.append("Java version: " + System.getProperty("java.version"));
        text.append("\n\n");
        DataSet dataset = Main.main.getCurrentDataSet();
        if (dataset != null) {
            text.append("Dataset consistency test:\n");
            String result = DatasetConsistencyTest.runTests(dataset);
            if (result.length() == 0) {
                text.append("No problems found\n");
            } else {
                text.append(result);
            }
            text.append("\n");
        }
        text.append("\n");
        text.append(PluginHandler.getBugReportText());
        text.append("\n");

        return text.toString();
    }

    public void actionPerformed(ActionEvent e) {
        StringBuilder text = new StringBuilder();
        text.append(getReportHeader());
        try {
            BufferedReader input = new BufferedReader(new FileReader(Main.pref
                    .getPreferencesDirFile()
                    + File.separator + "preferences"));
            try {
                String line = null;

                while ((line = input.readLine()) != null) {
                    // Skip potential private information
                    if (line.trim().toLowerCase().startsWith("osm-server.username")) {
                        continue;
                    }
                    if (line.trim().toLowerCase().startsWith("osm-server.password")) {
                        continue;
                    }
                    if (line.trim().toLowerCase().startsWith("marker.show")) {
                        continue;
                    }

                    text.append(line);
                    text.append("\n");
                }
            } finally {
                input.close();
            }
        } catch (Exception x) {
            x.printStackTrace();
        }

        JTextArea ta = new JTextArea(text.toString());
        ta.setWrapStyleWord(true);
        ta.setLineWrap(true);
        ta.setEditable(false);
        JScrollPane sp = new JScrollPane(ta);

        ExtendedDialog ed = new ExtendedDialog(Main.parent,
                tr("Status Report"),
                new String[] {tr("Copy to clipboard and close"), tr("Close") });
        ed.setButtonIcons(new String[] {"copy.png", "cancel.png" });
        ed.setContent(sp, false);
        ed.setMinimumSize(new Dimension(500, 0));
        ed.showDialog();

        if(ed.getValue() != 1) return;
        try {
            Toolkit.getDefaultToolkit().getSystemClipboard().setContents(
                    new StringSelection(text.toString()), new ClipboardOwner() {
                        public void lostOwnership(Clipboard clipboard, Transferable contents) {}
                    }
            );
        }
        catch (RuntimeException x) {}
    }
}