/* 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 org.hecl.*;
import java.util.ArrayList;
import java.util.Arrays;

/**
 * LabelCmd implements the "label" command, which 
 * just labels a point.
 */

public class LabelCmd implements Command {
    API api;
    boolean debug = false;
    
    public LabelCmd (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 < 2) throw new HeclException ("Illegal nb of arguments.");
        String lb = StringThing.get(argv[1]);
        
        switch (argv.length - 1) {
            case 1: // label
                api.label(lb);
                break;
            case 2: // label, position
            case 3: // label, point P1, point P2
            case 4: // label, point P1, point P2x, P2y or label, point P1x, P1y, point P2
            case 5: // label, point P1x, P1y, point P2x, P2y
                assert argv.length > 2;
                Thing[] argv2 = new Thing[argv.length-2];
                for (int i = 2; i < argv.length; i++) {
                    argv2[i-2] = argv[i];
                }
                ArrayList singleargv2 = splitArgv2(argv2);
                switch (singleargv2.size()) {
                    case 1: // position
                        String dir = StringThing.get(argv[2]);
                        api.label(lb, dir);
                        break;
                        
                    case 4: // point P1x, P1y, point P2x, P2y
                        // Convert the arguments from thing to double.
                        double[] argd = new double[4];
                        for (int i = 0; i < 4; i++) {
                            argd[i] = NumberThing.asNumber(singleargv2.get(i)).doubleValue();
                        }
                        api.labelline(argd[0], argd[1], argd[2], argd[3], lb);
                        break;
                    default:
                        throw new HeclException("Illegal nb of arguments.");
                }
                break;
            default:
                throw new HeclException ("Illegal nb of arguments.");
        }
        
	return null;
    }
    
    /** Make a list of arguments. 
     * Split List arguments to single arguments. */
    private ArrayList splitArgv2(Thing[] argv) throws HeclException {
        ArrayList singleargv = new ArrayList(argv.length);
        for (int i = 0; i < argv.length; i++) {
            Thing[] currentargv = ListThing.getArray(argv[i]);
            singleargv.addAll(Arrays.asList(currentargv));
        }
        return singleargv;
    }
}