import {QuizItem} from '#courses/classes/transformers/Item.js';
import {SOLQuestion} from '#quizzes/classes/transformers/Question.js';
import {
  ISOLAnswer,
  IQuestionAnswerFeedback,
} from '#quizzes/interfaces/grading.js';
import {ParameterMap} from '../tag-parser/tags/Tag.js';

import {IGrader} from './interfaces/IGrader.js';

class SOLQuestionGrader implements IGrader {
  constructor(readonly question: SOLQuestion) {}
  async grade(
    answer: ISOLAnswer,
    quiz: QuizItem,
    parameterMap?: ParameterMap,
    selectedAnswerTexts?: string [],
  ): Promise<any> {
    const correctLotItemId = this.question.correctLotItem._id;
    const isCorrect =
      answer.lotItemId.toString() === correctLotItemId.toString();
        let answerFeedback = isCorrect
          ? 'Correct answer!'
          : 'Incorrect answer.';

    if (selectedAnswerTexts?.length) {
      const selectedTextList = selectedAnswerTexts.join(', ');
      answerFeedback += ` Selected answer(s): ${selectedTextList}.`;
    }

    const feedback: IQuestionAnswerFeedback = {
      questionId: this.question._id,
      status: isCorrect ? 'CORRECT' : 'INCORRECT',
      score: isCorrect ? this.question.points : 0,
      answerFeedback,
    };
    
    return feedback;
  }
}

export {SOLQuestionGrader};