/* Copyright (C) 2016 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 org.hecl.*;

/**
 * TextCmd implements the "text" command, which 
 * writes some text.
 */

public class TextCmd implements Command {
    API api;
    boolean debug = false;
    
    public TextCmd (API api) {
        this.api = api;
    }
    
    @Override
    public Thing cmdCode(Interp interp, Thing[] argv) throws HeclException {
        if (debug) System.out.println(argv[0].toString());
        
        String text;
        if (argv.length > 1) {
            text = StringThing.get(argv[1]);
        } else text = "";
        double availablewidth;
        boolean justified;
        
        switch (argv.length - 1) {
            case 0: // line feed
                api.text("");
                break;
            case 1: // label
                api.text(text);
                break;
            case 2: // label, availablewidth
                try {
                    availablewidth = DoubleThing.get(argv[2]);
                    justified = false;
                } catch (NumberFormatException e) {
                    availablewidth = -1; // use previous value
                    justified = getTextStyle(StringThing.get(argv[2]));
                }
                api.text(text, availablewidth, justified);
                break;
            case 3: // label, availablewidth, justified
                availablewidth = 0;
                String str = "";
                boolean ok;
                try {
                    availablewidth = DoubleThing.get(argv[2]);
                    str = StringThing.get(argv[3]);
                    ok = true;
                } catch (NumberFormatException e) {
                    ok = false;
                }
                if (!ok) {
                    try {
                        str = StringThing.get(argv[2]);
                        availablewidth = DoubleThing.get(argv[3]);
                        ok = true;
                    } catch (NumberFormatException e) {
                        ok = false;
                    }
                }
                if (ok) {
                    justified = getTextStyle(str);
                    api.text(text, availablewidth, justified);
                } else {
                    throw new HeclException ("Illegal arguments for text: " + StringThing.get(argv[2]) + " " + StringThing.get(argv[3]));
                }
                break;
            default:
                throw new HeclException ("Illegal nb of arguments.");
        }
        
	return null;
    }
    
    private boolean getTextStyle(String str) throws HeclException {
        String s = str.toLowerCase();
        if (s.equals("justify")) return true;
        if (s.equals("left")) return false;
        throw new HeclException ("Illegal argument for text alignment : " + str);
    }
}