/**
 *
 * Copyright (c) 2014, the Railo Company Ltd. All rights reserved.
 *
 * 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/>.
 * 
 **/
/**
 * Implements the CFML Function arraytolist
 */
package lucee.runtime.functions.list;

import lucee.runtime.PageContext;
import lucee.runtime.exp.PageException;
import lucee.runtime.ext.function.BIF;
import lucee.runtime.op.Caster;
import lucee.runtime.type.Array;
import lucee.runtime.type.QueryColumn;

public final class ArrayToList extends BIF {

	private static final long serialVersionUID = -4909685848106371747L;

	public static String call(PageContext pc , Array array) throws PageException {
		return call(pc,array,',');
	}

	public static String call(PageContext pc , Array array, String delimiter) throws PageException {
		if(delimiter.length()==1) return call(pc,array,delimiter.charAt(0));
		if(array instanceof QueryColumn) array=unwrap(pc,(QueryColumn)array);
		int len=array.size();
		if(len==0) return "";
		if(len==1)return Caster.toString(array.get(1,""));
		
		Object o=array.get(1,null);
		StringBuilder sb=new StringBuilder(o==null?"":Caster.toString(o));
		for(int i=2;i<=len;i++) {
			sb.append(delimiter);
			o=array.get(i,null);
			sb.append(o==null?"":Caster.toString(o));
		}
		return sb.toString();
	}
	public static String call(PageContext pc , Array array, char delimiter) throws PageException {
		if(array instanceof QueryColumn) array=unwrap(pc,(QueryColumn)array);
		int len=array.size();
		if(len==0) return "";
		if(len==1)return Caster.toString(array.getE(1));
		
		Object o=array.get(1,null);
		StringBuilder sb=new StringBuilder(o==null?"":Caster.toString(o));
		for(int i=2;i<=len;i++) {
			sb.append(delimiter);
			o=array.get(i,null);
			sb.append(o==null?"":Caster.toString(o));
		}
		return sb.toString();
	}
	
	private static Array unwrap(PageContext pc, QueryColumn col) {
		Array arr = Caster.toArray(col.get(pc,(Object)null),null);
		if(arr!=null) return arr;
		return (Array)col;
	}
	
	@Override
	public Object invoke(PageContext pc, Object[] args) throws PageException {
		if(args.length==1) return call(pc,Caster.toArray(args[0]));
		return call(pc,Caster.toArray(args[0]),Caster.toString(args[1]));
	}
}