/*
 * Copyright 2009-2010 Yuichiro Moriguchi
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package net.morilib.lisp.swing.util;

import java.awt.event.ActionListener;

import javax.swing.Timer;

import net.morilib.lisp.ConsIterator;
import net.morilib.lisp.Datum;
import net.morilib.lisp.Environment;
import net.morilib.lisp.LispMessage;
import net.morilib.lisp.LispUtils;
import net.morilib.lisp.Subr;
import net.morilib.lisp.subr.SubrUtils;
import net.morilib.lisp.swing.LispSwing;
import net.morilib.util.Iterators;

/**
 *
 *
 * @author MORIGUCHI, Yuichiro 2012/07/24
 */
public class MakeSwingTimer extends Subr {

	/* (non-Javadoc)
	 * @see net.morilib.lisp.Subr#eval(net.morilib.lisp.Datum, net.morilib.lisp.Environment, net.morilib.lisp.LispMessage)
	 */
	@Override
	public Datum eval(Datum body, Environment env, LispMessage mesg) {
		ConsIterator itr = new ConsIterator(body);
		int delay = SubrUtils.nextSmallInt(itr, mesg, body), edelay;
		Datum c2a = SubrUtils.nextIf(itr, mesg, body);
		Datum c3a = Iterators.nextIf(itr);
		Datum c4a = Iterators.nextIf(itr);
		ActionListener l;
		Timer t;

		SubrUtils.checkTerminated(itr, body, mesg);
		if(delay < 0) {
			throw mesg.getError("err.require.int.nonnegative", delay);
		}
		l = LispSwing.createActionListener(c2a, env, mesg);
		t = new Timer(delay, l);

		if(c3a == null) {
			t.setRepeats(true);
		} else if(!c3a.isTrue()) {
			t.setRepeats(false);
		} else {
			t.setRepeats(true);
			edelay = SubrUtils.getSmallInt(c3a, mesg);
			if(edelay < 0) {
				throw mesg.getError("err.require.int.nonnegative",
						edelay);
			}
			t.setDelay(edelay);
		}

		if(c4a != null) {
			t.setActionCommand(LispUtils.print(c4a));
		}
		return new LispSwingTimer(t);
	}

}
