// CEFR等級映射
export const getCEFRToLevel = (cefr: string): number => {
  const mapping: { [key: string]: number } = {
    'A1': 20, 'A2': 35, 'B1': 50, 'B2': 65, 'C1': 80, 'C2': 95
  }
  return mapping[cefr] || 50
}

// 根據CEFR等級獲取複習類型
export const getReviewTypesByCEFR = (userCEFR: string, wordCEFR: string): string[] => {
  const userLevel = getCEFRToLevel(userCEFR)
  const wordLevel = getCEFRToLevel(wordCEFR)
  const difficulty = wordLevel - userLevel

  if (userCEFR === 'A1') {
    return ['flip-memory', 'vocab-choice']
  } else if (difficulty < -10) {
    return ['sentence-reorder', 'sentence-fill']
  } else if (difficulty >= -10 && difficulty <= 10) {
    return ['sentence-fill', 'sentence-reorder']
  } else {
    return ['flip-memory', 'vocab-choice']
  }
}

// 模式標籤映射
export const getModeLabel = (mode: string): string => {
  const labels: { [key: string]: string } = {
    'flip-memory': '翻卡記憶',
    'vocab-choice': '詞彙選擇',
    'sentence-fill': '例句填空',
    'sentence-reorder': '例句重組',
    'vocab-listening': '詞彙聽力',
    'sentence-listening': '例句聽力',
    'sentence-speaking': '例句口說'
  }
  return labels[mode] || mode
}