import { ANTLRInputStream, CommonTokenStream } from 'antlr4ts';
import { RelativeDateFormatLexer } from './lib/lexer-parser/RelativeDateFormatLexer'
import { RelativeDateFormatParser } from './lib/lexer-parser/RelativeDateFormatParser'
import { RDFFunctionFactory } from './resolvers/RDFFunctionFactory';

// Create the lexer and parser


export default function RDF(rdfString:string, now?:number):[number,number]{

  const functionFactory = new RDFFunctionFactory(now)

  let inputStream = new ANTLRInputStream(rdfString);
  let lexer = new RelativeDateFormatLexer(inputStream);
  let tokenStream = new CommonTokenStream(lexer);
  let parser = new RelativeDateFormatParser(tokenStream);

  let directive = parser.directive()

  return functionFactory.visit(directive).solve()

}