package org.vaadin.console.ansi;

import java.util.HashMap;

import java.util.Map;

import java.util.regex.Matcher;

import java.util.regex.Pattern;

/**

 * Default converter for numeric-only ANSI codes. 

 * 

 * @author indvdum

 * 31.05.2011 13:55:47

 *

 */

public class DefaultANSICodeConverter implements ANSICodeConverter {

	protected static final Map<Integer, String> ANSI_CSS = new HashMap<Integer, String>();

	static{

		ANSI_CSS.put(0, "");

		ANSI_CSS.put(1, "term-font-weight-bolder");

		ANSI_CSS.put(2, "term-font-weight-lighter");

		ANSI_CSS.put(3, "term-font-style-italic");

		ANSI_CSS.put(4, "term-text-decoration-underline");

		ANSI_CSS.put(5, "term-text-decoration-blink");

		ANSI_CSS.put(6, "term-text-decoration-blink");

		ANSI_CSS.put(9, "term-text-decoration-line-through");

		ANSI_CSS.put(22, "term-font-weight-normal");

		ANSI_CSS.put(24, "term-text-decoration-none");

		ANSI_CSS.put(25, "term-text-decoration-none");

		ANSI_CSS.put(29, "term-text-decoration-none");

		ANSI_CSS.put(30, "term-color-black");

		ANSI_CSS.put(31, "term-color-red");

		ANSI_CSS.put(32, "term-color-green");

		ANSI_CSS.put(33, "term-color-yellow");

		ANSI_CSS.put(34, "term-color-blue");

		ANSI_CSS.put(35, "term-color-purple");

		ANSI_CSS.put(36, "term-color-teal");

		ANSI_CSS.put(37, "term-color-silver");

		ANSI_CSS.put(40, "term-background-color-black");

		ANSI_CSS.put(41, "term-background-color-red");

		ANSI_CSS.put(42, "term-background-color-green");

		ANSI_CSS.put(43, "term-background-color-yellow");

		ANSI_CSS.put(44, "term-background-color-blue");

		ANSI_CSS.put(45, "term-background-color-purple");

		ANSI_CSS.put(46, "term-background-color-teal");

		ANSI_CSS.put(47, "term-background-color-silver");

		ANSI_CSS.put(53, "term-text-decoration-overline");

		ANSI_CSS.put(55, "term-text-decoration-none");

	}

	@Override

	public String convertANSIToCSS(String ansiEscapeSequence) {

		StringBuilder cssClasses = new StringBuilder("");

		Matcher matcher = Pattern.compile(ANSI_PATTERN).matcher(ansiEscapeSequence);

		if(!matcher.matches())

			return cssClasses.toString();

		String codes[] = matcher.group(2).split(";");

		for(int i = 0; i < codes.length; i++){

			if(!codes[i].matches("[0-9]+")) // processing only numeric codes

				continue;

			int nCode = Integer.valueOf(codes[i]);

			if(nCode == 38){ // Set xterm-256 text color, nothing to do

				i+=2;

				continue;

			}

			if(nCode == 48){ // Set xterm-256 background color, nothing to do

				i+=2;

				continue;

			}

			String cssClass = getCSSClass(nCode);

			if(cssClass == null)

				continue;

			cssClass = cssClass.trim();

			if(cssClass.length() > 0)

				cssClasses.append(cssClass).append(" "); 

		}

		return cssClasses.toString().trim();

	}

	/**

	 * Converting one numeric ANSI code to one or many CSS-classes. 

	 *

	 * @param ansiCode ANSI code

	 * @return CSS-class(es).

	 */

	protected String getCSSClass(int ansiCode) {

		return ANSI_CSS.get(ansiCode);

	}

	/**

	 * Converting one string ANSI code to one or many CSS-classes. 

	 *

	 * @param ansiCode ANSI code

	 * @return CSS-class(es).

	 */

	protected String getCSSClass(String ansiCode) {

		return "";

	}

}