/*
 * ReportLogPanel.java
 *
 * Copyright (c) 2009 Jay Lawson <jaylawson39 at yahoo.com>. All rights reserved.
 *
 * This file is part of MekHQ.
 *
 * MekHQ 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.
 *
 * MekHQ 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 MekHQ.  If not, see <http://www.gnu.org/licenses/>.
 */

package mekhq.gui;


import java.awt.BorderLayout;
import java.io.IOException;
import java.io.Reader;
import java.io.StringReader;
import java.util.List;

import javax.swing.BorderFactory;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextPane;
import javax.swing.border.EmptyBorder;
import javax.swing.text.BadLocationException;
import javax.swing.text.DefaultCaret;
import javax.swing.text.html.HTMLDocument;
import javax.swing.text.html.HTMLEditorKit;

import mekhq.Utilities;

/**
 * This is a panel for displaying the reporting log for each day. We are putting it into
 * its own panel so that we can later extend this to include chat and maybe break up the log
 * into different sections
 *
 * @author Jay Lawson
 *
 */
public class DailyReportLogPanel extends JPanel {

    /**
     *
     */
    private static final long serialVersionUID = -6512675362473724385L;
    JTextPane txtLog;
    String logText = new String();

    public DailyReportLogPanel(ReportHyperlinkListener listener) {
        txtLog = new JTextPane() {
            /**
             *
             */
            private static final long serialVersionUID = 9000659006965230883L;

            public boolean getScrollableTracksViewportWidth() {
                return true;
            }
        };
        txtLog.addHyperlinkListener(listener);
        initComponents();
    }

    private void initComponents() {
        setLayout(new BorderLayout());
        setBorder(BorderFactory.createTitledBorder("Daily Log"));
        txtLog.setContentType("text/html"); // NOI18N
        txtLog.setEditable(false);
        DefaultCaret caret = (DefaultCaret)txtLog.getCaret();
        caret.setUpdatePolicy(DefaultCaret.ALWAYS_UPDATE);
        JScrollPane scrLog = new JScrollPane(txtLog);
        scrLog.setBorder(new EmptyBorder(2,10,2,2));
        add(scrLog, BorderLayout.CENTER);
    }

    public void refreshLog(String s) {
    	if(logText.equals(s)) {
    		return;
    	}
        logText = s;
        //txtLog.setText(logText); -- NO. BAD. DON'T DO THIS.
        Reader stringReader = new StringReader(logText);
        HTMLEditorKit htmlKit = new HTMLEditorKit();
        HTMLDocument blank = (HTMLDocument) htmlKit.createDefaultDocument();
        try {
			htmlKit.read(stringReader, blank, 0);
		} catch (Exception e) {
			// Ignore
		}
        txtLog.setDocument(blank);
		txtLog.setCaretPosition(blank.getLength());
    }

	public void appendLog(List<String> newReports) {
		String addedText = Utilities.combineString(newReports, ""); //$NON-NLS-1$z
		if((null != addedText) && (addedText.length() > 0)) {
		    if (logText.length() > 0) {
    			HTMLDocument doc = (HTMLDocument) txtLog.getDocument();
    			try {
    				// Element 0 is <head>, Element 1 is <body>
    				doc.insertBeforeEnd(doc.getDefaultRootElement().getElement(1).getElement(0), addedText);
    				logText = logText + addedText;
    			} catch (BadLocationException | IOException e) {
    				// Shouldn't happen
    			}
    			txtLog.setCaretPosition(doc.getLength());
		    } else {
		        refreshLog(addedText);
		    }
		}
	}

    public String getLogText() {
        return logText;
    }
}