/*
 * FindBugs - Find Bugs in Java programs
 * Copyright (C) 2006, University of Maryland
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 * 
 * This library 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
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package edu.umd.cs.findbugs.gui2;

import java.util.Collection;

import edu.umd.cs.findbugs.BugInstance;
import edu.umd.cs.findbugs.filter.AndMatcher;
import edu.umd.cs.findbugs.filter.BugMatcher;
import edu.umd.cs.findbugs.filter.ClassMatcher;
import edu.umd.cs.findbugs.filter.DesignationMatcher;
import edu.umd.cs.findbugs.filter.FirstVersionMatcher;
import edu.umd.cs.findbugs.filter.LastVersionMatcher;
import edu.umd.cs.findbugs.filter.Matcher;
import edu.umd.cs.findbugs.filter.OrMatcher;
import edu.umd.cs.findbugs.filter.PriorityMatcher;
import edu.umd.cs.findbugs.filter.RelationalOp;
import edu.umd.cs.findbugs.gui2.BugAspects.SortableValue;

/**
 * @author pugh
 */
public class FilterFactory {

	
	public static Matcher makeOrMatcher(Collection<SortableValue> sortables)
	{
		return makeMatcher(sortables,false);
	}
	public static Matcher makeAndMatcher(Collection<SortableValue> sortables) {
		return makeMatcher(sortables,true);
	}
	private static Matcher makeMatcher(Collection<SortableValue> sortables, boolean andOr)
	{
		if (sortables.size() == 1) {
			for (SortableValue s : sortables)
				return makeMatcher(s);
		}
		edu.umd.cs.findbugs.filter.CompoundMatcher matcher;
		if (andOr==true)
			matcher = new AndMatcher();
		else
			matcher = new OrMatcher();
		for (SortableValue s : sortables)
			matcher.addChild(makeMatcher(s));
		return matcher;		
	}
	
	public static Matcher makeMatcher(Collection<Sortables> sortables, BugInstance bug) {
		if (sortables.size() == 1) {
			for (Sortables s : sortables)
				return makeMatcher(s, bug);
		}
		AndMatcher matcher = new AndMatcher();
		for (Sortables s : sortables)
			matcher.addChild(makeMatcher(s, bug));
		return matcher;
	}

	/**
	 * @param s
	 * @param bug
	 * @return
	 */
	private static Matcher makeMatcher(Sortables s, BugInstance bug) {
		switch (s) {
		case BUGCODE:
			return new BugMatcher(s.getFrom(bug), null, null);
		case CATEGORY:
			return new BugMatcher(null, null, s.getFrom(bug));
		case CLASS:
			return new ClassMatcher(s.getFrom(bug));
		case DESIGNATION:
			return new DesignationMatcher(s.getFrom(bug));
			
		case FIRSTVERSION:
			return new FirstVersionMatcher(s.getFrom(bug),RelationalOp.EQ);
		case LASTVERSION:
			return new LastVersionMatcher(s.getFrom(bug),RelationalOp.EQ);
		case PACKAGE:
			String p = Sortables.CLASS.getFrom(bug);
			int lastDot = p.lastIndexOf('.');
			if (lastDot > 0)
				p = p.substring(0, lastDot);
			return new ClassMatcher("~" + p + "\\.[^.]+");
		case PRIORITY:
			return new PriorityMatcher(Integer.toString(bug.getPriority()));
			
		case TYPE:
			return new BugMatcher(null, s.getFrom(bug), null);

		case DIVIDER:
		default:
			throw new IllegalArgumentException();

		}

	}

	private static Matcher makeMatcher(SortableValue sv) {
		Sortables s = sv.key;
		String value = sv.value;
		switch (s) {
		case BUGCODE:
			return new BugMatcher(value, null, null);
		case CATEGORY:
			return new BugMatcher(null, null, value);
		case CLASS:
			return new ClassMatcher(value);
		case DESIGNATION:
			return new DesignationMatcher(value);
			
		case FIRSTVERSION:
			return new FirstVersionMatcher(value,RelationalOp.EQ);
		case LASTVERSION:
			return new LastVersionMatcher(value,RelationalOp.EQ);
		case PACKAGE:
			return new ClassMatcher("~" + value + "\\.[^.]+");
		case PRIORITY:
			return new PriorityMatcher(value);
			
		case TYPE:
			return new BugMatcher(null, value, null);

		case DIVIDER:
		default:
			throw new IllegalArgumentException();

		}

	}

}
