/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.usergrid.launcher;


import java.awt.BorderLayout;
import java.io.IOException;

import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.SwingUtilities;
import javax.swing.WindowConstants;

import org.apache.log4j.AppenderSkeleton;
import org.apache.log4j.Logger;
import org.apache.log4j.PatternLayout;
import org.apache.log4j.spi.LoggingEvent;


public class LogViewerFrame extends JFrame {

    private static final long serialVersionUID = 1L;

    JTextArea textArea = new JTextArea();

    App app;


    public LogViewerFrame( App app ) throws IOException {
        super( "Log" );
        this.app = app;

        // Add a scrolling text area
        textArea.setEditable( false );
        textArea.setRows( 20 );
        textArea.setColumns( 50 );
        getContentPane().add( new JScrollPane( textArea ), BorderLayout.CENTER );
        pack();
        // setLocationRelativeTo(app.getLauncher());
        setLocation( 100, 100 );
        setDefaultCloseOperation( WindowConstants.HIDE_ON_CLOSE );
        setVisible( false );

        Log4jAppender appender = new Log4jAppender();
        Logger.getRootLogger().addAppender( appender );
    }


    public void appendMessage( final String message ) {
        SwingUtilities.invokeLater( new Runnable() {
            @Override
            public void run() {
                textArea.append( message );
                try {
                    textArea.setCaretPosition( textArea.getDocument().getLength() );
                }
                catch ( Exception e ) {
                }
            }
        } );
    }


    public class Log4jAppender extends AppenderSkeleton {

        PatternLayout layout;


        public Log4jAppender() {
            layout = new PatternLayout( "[%d{dd-MMM-yyyy HH:mm:ss,SSS}][%p][%t] %l %m%n" );
        }


        @Override
        public void close() {
        }


        @Override
        public boolean requiresLayout() {
            return false;
        }


        @Override
        protected void append( LoggingEvent loggingEvent ) {
            appendMessage( layout.format( loggingEvent ) );
        }
    }
}