package wcps.server.cli;

import grammar.*;
import grammar.wcpsParser.*;
import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import org.antlr.runtime.ANTLRInputStream;
import org.antlr.runtime.CommonTokenStream;
import org.antlr.runtime.RecognitionException;
import org.apache.commons.io.FileUtils;

/** Test the WCPS grammar parser (generated by ANTLR).
 * Input the path that contains an Abstract Syntax query.
 * Outputs the corresponding XML tree.
 *
 * @author Andrei Aiordachioaie
 */
public class f_grammar {

    private static String query;
    private static String path;

    public static void main(String[] args) throws RecognitionException, IOException
    {
        if (args.length != 1)
        {
            System.err.println("AbstractGrammarGen: no parameter to specify input file !");
            path = "test/test-tmp/29.test";
            query = FileUtils.readFileToString(new File(path));
        }
        else
        {
            path = args[0];
            query = FileUtils.readFileToString(new File(path));
        }
			
		System.out.println("Running with the following query: " + query);

        String xmlString = runQuery(query);
        System.out.println("Output XML: \n****************\n" + xmlString);
         
        System.exit(0);

    }

    public static String runQuery(String query) throws IOException, RecognitionException
    {
        InputStream stream = new ByteArrayInputStream(query.getBytes()); // defaults to ISO-1
        ANTLRInputStream inputStream = new ANTLRInputStream(stream);
//        wcpsLexer lexer = new wcpsLexer( inputStream );
		wcpsLexer lexer = new wcpsLexer( inputStream );

        CommonTokenStream tokenStream = new CommonTokenStream(lexer);
//        wcpsParser parser = new wcpsParser(tokenStream);
		wcpsParser parser = new wcpsParser(tokenStream);

        wcpsRequest_return rrequest = parser.wcpsRequest();
		WCPSRequest request = rrequest.value;

        String result = request.toXML();
        return result;
    }

}