package test.editortest;

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.LinkedList;
import java.util.List;

import javax.swing.JButton;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.event.DocumentEvent;
import javax.swing.event.DocumentListener;
import javax.swing.text.BadLocationException;

import rep.REPCommand;

public class REPTextWithJTextArea implements REPText, DocumentListener, ActionListener {

	private JTextArea textArea;
	private String BR = System.getProperty("line.separator");
	private LinkedList<REPTextListener> textListenerList = new LinkedList<REPTextListener>();
	private JTextField lineField;
	private JTextField textField;
	private JButton deleteButton;
	private JButton insertButton;

	public REPTextWithJTextArea(JTextArea textArea, JTextField lineField, JTextField textField, JButton deleteButton, JButton insertButton) {
		this.textArea = textArea;
		this.lineField = lineField;
		this.textField = textField;
		this.deleteButton = deleteButton;
		this.insertButton = insertButton;
		textArea.getDocument().addDocumentListener(this);
		textField.addActionListener(this);
		deleteButton.addActionListener(this);
		insertButton.addActionListener(this);
	}

	public String delete(int lineno) {
		for(int i = size(); i <= lineno; i++){
			increaseLine();
		}
		
		String del = getLineText(lineno);
		try {
			int start = textArea.getLineStartOffset(lineno);
			int end = textArea.getLineEndOffset(lineno);
			textArea.replaceRange("", start, end);
		} catch (BadLocationException e) {
			e.printStackTrace();
		}
		return del;
	}

	public void insert(int lineno, String text) {
		for(int i = size(); i <= lineno; i++){
			increaseLine();
		}
		
		String text2 = text + BR;
		try {
			int offset = textArea.getLineStartOffset(lineno);
			textArea.insert(text2, offset);
		} catch (BadLocationException e) {
			e.printStackTrace();
		}
	}
	
	private void increaseLine(){
		textArea.append(BR);
	}
	
	private String getLineText(int lineno){
		String text = null;
		try {
			int start = textArea.getLineStartOffset(lineno);
			int end = textArea.getLineEndOffset(lineno);
			text = textArea.getText(start, end-start);
			String text2 = text.replace(BR, "");
			text = text2;
		} catch (BadLocationException e) {
			e.printStackTrace();
		}
		return text;
	}

	public int size() {
		return textArea.getLineCount();
	}

	public String get(int i) {
		return getLineText(i);
	}

	public List<String> list() {
		LinkedList<String> list = new LinkedList<String>();
		for(int i = 0; i < size(); i++){
			list.add(getLineText(i));
		}
		return list;
	}

	public void addTextListener(REPTextListener listener) {
		textListenerList.add(listener);
	}

	public void changedUpdate(DocumentEvent e) {
		Logger.print(e);
	}

	public void insertUpdate(DocumentEvent e) {
		Logger.print(e);
		
	}

	public void removeUpdate(DocumentEvent e) {
		Logger.print(e);
	}

	public void actionPerformed(ActionEvent e) {
		if(e.getSource() == textField){
			userInsert();
			textField.setText("");
		}else if(e.getSource() == deleteButton){
			userDelete();
		}else if(e.getSource() == insertButton){
			userInsert();
		}
	}

	private void userDelete() {
		int lineno = 0;
		try {
			lineno = Integer.parseInt((lineField.getText()));
			if(lineno < 0) lineno = 0;
		}catch(NumberFormatException e){}
		
		String del = delete(lineno);
		for(REPTextListener listener : textListenerList){
			listener.textDeleted(new REPTextEvent(lineno, del));
		}
	}

	private void userInsert() {
		int lineno;
		try {
			lineno = Integer.parseInt((lineField.getText()));
		}catch(NumberFormatException e){
			lineno = 0;
		}
		String text = textField.getText();
		insert(lineno, text);
		for(REPTextListener listener : textListenerList){
			listener.textInserted(new REPTextEvent(lineno, text));
		}
	}
	
	public void userInsert(REPCommand command) {
		int lineno = command.lineno;
		String text = command.string;
		insert(lineno, text);
		for(REPTextListener listener : textListenerList){
			listener.textInserted(new REPTextEvent(lineno, text));
		}
	}

}