/**
 *
 * Copyright (c) 2014, the Railo Company Ltd. All rights reserved.
 * Copyright (c) 2015, Lucee Assosication Switzerland
 *
 * 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, see <http://www.gnu.org/licenses/>.
 * 
 **/
package lucee.commons.io.res.util;

import java.util.regex.Pattern;

import lucee.commons.io.SystemUtil;
import lucee.commons.io.res.Resource;
import lucee.commons.lang.StringUtil;

import org.apache.oro.text.regex.MalformedPatternException;


/**
 * Wildcard Filter
 */
public class WildCardFilter implements ResourceAndResourceNameFilter {
    
    private static final String specials="{}[]().+\\^$";
    private static final boolean IS_WIN=SystemUtil.isWindows();
    
	private final Pattern pattern;
    private final String wildcard;
	private boolean ignoreCase;

    public WildCardFilter(String wildcard) {
    	this(wildcard,IS_WIN);
    }
	
    /**
     * @param wildcard
     * @throws MalformedPatternException
     */
    public WildCardFilter(String wildcard,boolean ignoreCase) {
        this.wildcard=wildcard;
        StringBuilder sb = new StringBuilder(wildcard.length());
        int len=wildcard.length();
        
        for(int i=0;i<len;i++) {
            char c = wildcard.charAt(i);
            if(c == '*')sb.append(".*");
            else if(c == '?') sb.append('.');
            else if(specials.indexOf(c)!=-1)sb.append('\\').append(c);
            else sb.append(c);
        }
        
        this.ignoreCase=ignoreCase;
        pattern=Pattern.compile(ignoreCase?StringUtil.toLowerCase(sb.toString()):sb.toString());
    }

    @Override
    public boolean accept(Resource file) {
        return pattern.matcher(ignoreCase?StringUtil.toLowerCase(file.getName()):file.getName()).matches();
    }

	@Override
	public boolean accept(Resource parent, String name) {
		return pattern.matcher(ignoreCase?StringUtil.toLowerCase(name):name).matches();
	}
	public boolean accept(String name) {
		return pattern.matcher(ignoreCase?StringUtil.toLowerCase(name):name).matches();
	}

    @Override
	public String toString() {
		return "Wildcardfilter:"+wildcard;
	}
    
	
	/*public static void main(String[] args) {
		WildCardFilter filter = new WildCardFilter("*.cfc", true);
		assertTrue(filter.accept("susi.cfc"));
		assertFalse(filter.accept("susi.cf"));
		assertTrue(filter.accept(".cfc"));
		assertTrue(filter.accept("xx.CFC"));
		
		filter = new WildCardFilter("*.cfc", false);
		assertTrue(filter.accept("susi.cfc"));
		assertFalse(filter.accept("susi.cf"));
		assertTrue(filter.accept(".cfc"));
		assertFalse(filter.accept("xx.CFC"));
		
		filter = new WildCardFilter("ss?xx.cfc", false);
		assertFalse(filter.accept("susi.cfc"));
		assertTrue(filter.accept("ss1xx.cfc"));
		assertFalse(filter.accept("ss12xx.cfc"));
		

		filter = new WildCardFilter("ss*xx.cfc", false);
		assertFalse(filter.accept("susi.cfc"));
		assertTrue(filter.accept("ss1xx.cfc"));
		assertTrue(filter.accept("ss12xx.cfc"));

		filter = new WildCardFilter("ss*xx.cfc", false);
		assertTrue(filter.accept("ss{}[]().+\\^$ss12xx.cfc"));
		
		print.e("done");
	}

	private static void assertTrue(boolean b) {
		if(!b) throw new RuntimeException("value is false, but true is expected");
	}

	private static void assertFalse(boolean b) {
		if(b) throw new RuntimeException("value is true, but false is expected");
	}*/
	
}