src/lib/codingProgress.ts

import { codingQuestions, type CodingQuestion } from '@/data/codingQuestions';

export const TOTAL_CODING_QUESTIONS = codingQuestions.length;

export const DIFFICULTY_TOTALS = {
  Easy: codingQuestions.filter((question) => question.difficulty === 'Easy').length,
  Medium: codingQuestions.filter((question) => question.difficulty === 'Medium').length,
  Hard: codingQuestions.filter((question) => question.difficulty === 'Hard').length,
} as const;

const rewardByDifficulty: Record<CodingQuestion['difficulty'], number> = {
  Easy: 10,
  Medium: 25,
  Hard: 50,
};

export function getQuestionReward(difficulty: CodingQuestion['difficulty']) {
  return rewardByDifficulty[difficulty];
}

export function getQuestionCaseCount(question: CodingQuestion) {
  return question.testCases.length + question.hiddenTestCases.length;
}

export function getSolvedDifficultyCounts(solvedQuestionIds: string[]) {
  const solvedSet = new Set(solvedQuestionIds);

  return codingQuestions.reduce(
    (counts, question) => {
      if (solvedSet.has(question.id)) {
        counts[question.difficulty] += 1;
      }
      return counts;
    },
    {
      Easy: 0,
      Medium: 0,
      Hard: 0,
    } as Record<CodingQuestion['difficulty'], number>,
  );
}