package org.simantics.spreadsheet.graph.formula;

import org.simantics.spreadsheet.graph.CellFormulaFunction;
import org.simantics.spreadsheet.graph.CellValueVisitor;
import org.simantics.spreadsheet.graph.SpreadsheetGraphUtils;
import org.simantics.spreadsheet.graph.parser.ast.AstArgList;

public class OrFormulaFunction implements CellFormulaFunction<Object> {

    @Override
    public Object evaluate(CellValueVisitor visitor, AstArgList args) {
        if (args.values.size() == 0) throw new IllegalStateException();
        
        for (int i = 0; i < args.values.size(); i++) {
        	Object obj = null;
        	try {
        		obj = args.values.get(i).accept(visitor);
        	} catch (IllegalStateException e){
        		return FormulaError2.NAME.getString();
        	}
        	FormulaError2 error = FormulaError2.forObject(obj);
        	if(error!=null) return error.getString();
        	
            if (SpreadsheetGraphUtils.asBoolean(obj))
                return Boolean.TRUE;
        }
        return Boolean.FALSE;
    }

}