package com.gpl.rpg.atcontentstudio.ui.tools;

import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.IOException;
import java.io.OutputStream;
import java.io.PrintStream;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JSplitPane;
import javax.swing.JTextArea;

import org.fife.ui.rsyntaxtextarea.RSyntaxTextArea;
import org.fife.ui.rsyntaxtextarea.SyntaxConstants;

import bsh.EvalError;
import bsh.Interpreter;

import com.gpl.rpg.atcontentstudio.ui.DefaultIcons;
import com.gpl.rpg.atcontentstudio.ui.WorkerDialog;
import com.jidesoft.swing.JideBoxLayout;

public class BeanShellView extends JFrame {

	/**
	 * 
	 */
	private static final long serialVersionUID = 8399265342746690313L;

	public BeanShellView() {
		super("ATCS BeanShell script pad");
		setIconImage(DefaultIcons.getMainIconImage());
		JSplitPane splitter = new JSplitPane(JSplitPane.VERTICAL_SPLIT);
		
		JPanel shPane = new JPanel();
		shPane.setLayout(new JideBoxLayout(shPane, JideBoxLayout.PAGE_AXIS));
		final RSyntaxTextArea shArea = new RSyntaxTextArea(30,80);
		shArea.setSyntaxEditingStyle(SyntaxConstants.SYNTAX_STYLE_JAVA);
		shPane.add(new JScrollPane(shArea), JideBoxLayout.VARY);
		
		JPanel shButtonPane = new JPanel();
		shButtonPane.setLayout(new JideBoxLayout(shButtonPane, JideBoxLayout.LINE_AXIS));
		shButtonPane.add(new JPanel(), JideBoxLayout.VARY);
		JButton run = new JButton("Run");
		shButtonPane.add(run, JideBoxLayout.FIX);
		shPane.add(shButtonPane, JideBoxLayout.FIX);
		splitter.setTopComponent(shPane);
		
		final RSyntaxTextArea outArea = new RSyntaxTextArea(20,40);
		outArea.setEditable(false);
		JPanel outPane = new JPanel();
		outPane.setLayout(new JideBoxLayout(outPane, JideBoxLayout.PAGE_AXIS));
		JPanel outButtonPane = new JPanel();
		outButtonPane.setLayout(new JideBoxLayout(outButtonPane, JideBoxLayout.LINE_AXIS));
		outButtonPane.add(new JLabel("Output"), JideBoxLayout.FIX);
		outButtonPane.add(new JPanel(), JideBoxLayout.VARY);
		JButton outClear = new JButton("Clear");
		outButtonPane.add(outClear, JideBoxLayout.FIX);
		outPane.add(outButtonPane, JideBoxLayout.FIX);
		outPane.add(new JScrollPane(outArea), JideBoxLayout.VARY);

		final RSyntaxTextArea errArea = new RSyntaxTextArea(20,40);
		errArea.setEditable(false);
		JPanel errPane = new JPanel();
		errPane.setLayout(new JideBoxLayout(errPane, JideBoxLayout.PAGE_AXIS));
		JPanel errButtonPane = new JPanel();
		errButtonPane.setLayout(new JideBoxLayout(errButtonPane, JideBoxLayout.LINE_AXIS));
		errButtonPane.add(new JLabel("Errors"), JideBoxLayout.FIX);
		errButtonPane.add(new JPanel(), JideBoxLayout.VARY);
		JButton errClear = new JButton("Clear");
		errButtonPane.add(errClear, JideBoxLayout.FIX);
		errPane.add(errButtonPane, JideBoxLayout.FIX);
		errPane.add(new JScrollPane(errArea), JideBoxLayout.VARY);

		
		JSplitPane errOut = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT);
		errOut.setLeftComponent(outPane);
		errOut.setRightComponent(errPane);
		splitter.setBottomComponent(errOut);
		
		run.addActionListener(new ActionListener() {
			@Override
			public void actionPerformed(ActionEvent e) {
				final Interpreter shInt = new Interpreter();
				final PrintStream printOut = new PrintStream(new AreaOutputStream(outArea));
				shInt.setOut(printOut);
				final PrintStream printErr = new PrintStream(new AreaOutputStream(errArea));
				shInt.setErr(printErr);
				
				WorkerDialog.showTaskMessage("Running your script...", null, new Runnable() {
					@Override
					public void run() {
						
						try {
							shInt.eval(shArea.getText());
						} catch (EvalError e1) {
							e1.printStackTrace(printErr);
						}
						printOut.flush();
						printErr.flush();
						printOut.close();
						printErr.close();
						
					}
				});
				
			}
		});
		
		outClear.addActionListener(new ActionListener() {
			@Override
			public void actionPerformed(ActionEvent e) {
				outArea.setText("");
			}
		});
		
		errClear.addActionListener(new ActionListener() {
			@Override
			public void actionPerformed(ActionEvent e) {
				errArea.setText("");
			}
		});
		
		
		getContentPane().setLayout(new BorderLayout());
		getContentPane().add(splitter, BorderLayout.CENTER);
		pack();
		setVisible(true);
	}
	
	public static class AreaOutputStream extends OutputStream {
		
		private JTextArea textArea;
		
		public AreaOutputStream(JTextArea area) {
			this.textArea = area;
		}
		
		@Override
		public void write(int b) throws IOException {
			textArea.append(String.valueOf((char)b));
			textArea.setCaretPosition(textArea.getDocument().getLength());
		}
		
	}
	
}