// This Source Code is in the Public Domain per: http://unlicense.org
package org.litesoft.GWT.client;

import org.litesoft.GWT.client.widgets.*;
import org.litesoft.logger.*;
import org.litesoft.logger.nonpublic.*;

public class TextAreaLogFactory extends SizeableTextArea {
    public TextAreaLogFactory() {
        super( false );
        setText( "" );
    }

    private static final String NEW_LINE = "\n";

    public void newLine() {
        append( NEW_LINE );
    }

    public void append( Object pObject ) {
        if ( isAttached() ) {
            setText( getText() + deNull( pObject ) );
        }
    }

    public void appendLine( Object pObject ) {
        append( deNull( pObject ) + NEW_LINE );
    }

    private String deNull( Object pObject ) {
        return String.valueOf( pObject );
    }

    public Logger createLogger( String pClassName, int pLoggerLevel ) {
        return new MyLogger( new LogHelper( this, pLoggerLevel ), pClassName );
    }

    private static class MyLogger extends Logger {
        public MyLogger( LogHelper pLogHelper, String pClassName ) {
            super( pLogHelper, pLogHelper, pClassName );
        }
    }

    private static class LogHelper implements ImplLoggerAdapterResolver,
                                              EnabledlogLevelAccessor {
        private TextAreaLogFactory mTextArea;
        private int mLoggerLevel;

        public LogHelper( TextAreaLogFactory pTextArea, int pLoggerLevel ) {
            mTextArea = pTextArea;
            mLoggerLevel = pLoggerLevel;
        }

        @Override
        public int getEnabledLevel() {
            return mLoggerLevel;
        }

        @Override
        public int getEnabledLevel( String pClassName ) {
            return getEnabledLevel();
        }

        @Override
        public ImplLoggerAdapter resolve( int pLevel, String pClassname ) {
            return new LoggerAdapter( mTextArea, LEVELS[pLevel], pClassname );
        }
    }

    private static class LoggerAdapter implements ImplLoggerAdapter {
        private TextAreaLogFactory mTextArea;
        private String mLevel, mClassname;

        public LoggerAdapter( TextAreaLogFactory pTextArea, String pLevel, String pClassname ) {
            mTextArea = pTextArea;
            mLevel = pLevel;
            mClassname = pClassname;
        }

        @Override
        public boolean isEnabled() {
            return true;
        }

        @Override
        public void log( String pText, Throwable pThrowable ) {
            addLine( toErr( pThrowable ), pText );
        }

        @Override
        public void log( String pText ) {
            addLine( "", pText );
        }

        private void addLine( String pErr, String pText ) {
            mTextArea.appendLine( "[" + mLevel + pErr + "]" + mClassname + " - " + pText );
        }

        private String toErr( Throwable pThrowable ) {
            return (pThrowable == null) ? "" : (",Err:" + pThrowable.getMessage());
        }
    }
}