/* Copyright (C) 2014 A.Vontobel  
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 *
 * The license is in LICENCE-GPL.txt.
 * If not, see http://www.gnu.org/licenses/old-licenses/gpl-2.0.html.
 */

package net.sf.drawj2d.cmd;

import java.awt.Color;
import org.hecl.*;
import java.util.ArrayList;
import java.util.Arrays;

/**
 * PenCmd implements the "pen" command, which sets color and pen width.
 */

public class PenCmd implements Command {
    API api;
    boolean debug = false;
    
    public PenCmd (API api) {
        this.api = api;
    }
    
    @Override
    public Thing cmdCode(Interp interp, Thing[] argv) throws HeclException {
        assert argv.length > 0;
        if (debug) System.out.println(argv[0].toString());
        
        if (argv.length == 1) {
            api.pen();
        } else {
            assert argv.length > 1;
            ArrayList singleargv = splitArgv(argv);
            for (Thing arg : singleargv) {
                if (NumberThing.isNumber(arg)) {
                    float size = NumberThing.asNumber(arg).floatValue();
                    api.pen(size);
                }
                else {
                    String str = StringThing.get(arg);
                    int linetype = getLineType(str);
                    if (linetype > 0) {
                        api.pen(linetype);
                    } else {
                        Color color = getColor(str);
                        api.pen(color);
                    }
                }
            }
        }
        
	return null;
    }
    
    private int getLineType(String str) {
        String s = str.toLowerCase();
        if (s.equals("dashed")) return API.DASHED;
        if (s.equals("dotted")) return API.DOTTED;
        if (s.equals("dashdotted")) return API.DASHDOTTED;
        if (s.equals("solid")) return API.SOLID;
        return -1;
    }
    
    private Color getColor(String colorstring) {
        String c = colorstring.toLowerCase();
        Color color = Color.black;
        if     (c.equals("black") || c.equals("k")) color = Color.black;
        else if (c.equals("blue") || c.equals("b")) color = Color.blue;
        else if (c.equals("cyan") || c.equals("c")) color = Color.cyan;
        else if (c.equals("darkgray") || c.equals("d")) color = Color.darkGray;
        else if (c.equals("gray") || c.equals("a")) color = Color.gray;
        else if (c.equals("green") || c.equals("g")) color = Color.green;
        else if (c.equals("lightgray") || c.equals("l")) color = Color.lightGray;
        else if (c.equals("magenta") || c.equals("m")) color = Color.magenta;
        else if (c.equals("orange") || c.equals("o")) color = Color.orange;
        else if (c.equals("pink") || c.equals("p")) color = Color.pink;
        else if (c.equals("red") || c.equals("r")) color = Color.red;
        else if (c.equals("white") || c.equals("w")) color = Color.white;
        else if (c.equals("yellow") || c.equals("y")) color = Color.yellow;
        else if (c.equals("brown")) color = new Color(0x87431D);
        else if (c.equals("darkorange")) color = new Color(0xFF6600);
        else try { // rgb hex value e.g. "0x87431D"
            color = Color.decode(colorstring);
        } catch (NumberFormatException nfe) {
            if (debug) System.out.println(nfe.getMessage());
            // black
        }
        
        return color;
    }
    
    /** Make a list of arguments (without command in argv[0]). 
     * Split List arguments to single arguments. */
    private ArrayList splitArgv(Thing[] argv) throws HeclException {
        ArrayList singleargv = new ArrayList(argv.length);
        for (int i = 1; i < argv.length; i++) {
            Thing[] currentargv = ListThing.getArray(argv[i]);
            singleargv.addAll(Arrays.asList(currentargv));
        }
        return singleargv;
    }
}