import { Expression } from './Expression';
import { ExpressionRef } from './ExpressionRef';
import { Result } from '../Result/Result';
import { OptionResult } from '../Result/OptionResult';

export class ExpressionOptions implements Expression {
  constructor(public parts: ExpressionRef[], public id: string) {}

  parse(input: string, end: boolean): Result {
    var failAttempt: Result[] = [];
    for (var i = 0; i < this.parts.length; i++) {
      var subResult = this.parts[i].parse(input, end);
      if (subResult.isSuccess()) {
        return new OptionResult(subResult, this, input, failAttempt);
      }
      failAttempt.push(subResult);
    }
    return new OptionResult(null, this, input, failAttempt);
  }

  public toString() {
    return this.id;
  }
}