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package org.unlaxer.tinyexpression.parser.javalang;

import org.unlaxer.Name;
import org.unlaxer.Token;
import org.unlaxer.parser.Parser;
import org.unlaxer.parser.Parsers;
import org.unlaxer.parser.ascii.LeftParenthesisParser;
import org.unlaxer.parser.ascii.RightParenthesisParser;
import org.unlaxer.parser.elementary.ParenthesesParser;
import org.unlaxer.util.annotation.TokenExtractor;

public class JavaStyleParenthesesParser extends JavaStyleDelimitedLazyChain {

  private static final long serialVersionUID = 6964996290002171327L;
  
  Parser inner;
  Class clazz;

  public JavaStyleParenthesesParser(Name name , Parser inner) {
    super(name);
    this.inner = inner;
  }


  public JavaStyleParenthesesParser(Parser inner) {
    super();
    this.inner = inner;
  }
  
   public JavaStyleParenthesesParser(Class innerParserClass) {
      super();
      this.inner = null;
      clazz = innerParserClass;
    }


  
  @TokenExtractor
  public static Token getParenthesesed(Token parenthesesed ){
    if(false == parenthesesed.parser instanceof ParenthesesParser){
      throw new IllegalArgumentException("this token did not generate from " + 
        ParenthesesParser.class.getName());
    }
    Parser contentsParser = JavaStyleParenthesesParser.class.cast(parenthesesed.parser).inner;
    return parenthesesed.getChildWithParser(parser -> parser.equals(contentsParser));
  }
  
  public Parser getParenthesesedParser(){
    return inner == null ? Parser.get(clazz) : inner;
  }

  @Override
  public Parsers getLazyParsers() {
    return 
      new Parsers(
        new LeftParenthesisParser(),
        getParenthesesedParser(),
        new RightParenthesisParser()
      );

  }

  @TokenExtractor
  public Token getInnerParserParsed(Token thisParserParsed) {
//    return thisParserParsed.filteredChildren.get(1);
    return thisParserParsed.getChildWithParser(parser->parser.equals(inner));
  }
}