import { QuizItem } from '@/lib/data/reviewSimpleData'

interface SimpleProgressProps {
  currentQuizItem?: QuizItem
  totalQuizItems: number
  completedQuizItems: number
  score: { correct: number; total: number }
  quizItems?: QuizItem[] // 用於顯示測驗項目統計
}

export function QuizProgress({ currentQuizItem, totalQuizItems, completedQuizItems, score, quizItems }: SimpleProgressProps) {
  const progress = (completedQuizItems / totalQuizItems) * 100
  const accuracy = score.total > 0 ? Math.round((score.correct / score.total) * 100) : 0

  // 測驗項目延遲統計計算
  const delayStats = quizItems ? {
    totalSkips: quizItems.reduce((sum, item) => sum + item.skipCount, 0),
    totalWrongs: quizItems.reduce((sum, item) => sum + item.wrongCount, 0),
    delayedItems: quizItems.filter(item => item.skipCount + item.wrongCount > 0).length
  } : null

  return (
    <div className="mb-8">
      <div className="flex justify-between items-center mb-3">
        <div>
          <span className="text-sm font-medium text-gray-600">線性複習進度</span>
          {currentQuizItem && (
            <div className="flex items-center mt-1">
              <span className="text-lg mr-2">
                {currentQuizItem.quizType === 'flip-card' ? '🔄' : '🎯'}
              </span>
              <span className="text-sm text-gray-500">
                {currentQuizItem.quizType === 'flip-card' ? '翻卡記憶' : '詞彙選擇'} • {currentQuizItem.cardData.word}
              </span>
            </div>
          )}
        </div>
        <div className="flex items-center gap-4 text-sm text-right">
          <span className="text-gray-600">
            {completedQuizItems}/{totalQuizItems} 項目
          </span>
          {score.total > 0 && (
            <span className="text-green-600 font-medium">
              準確率 {accuracy}%
            </span>
          )}
        </div>
      </div>

      {/* 進度條 */}
      <div className="w-full bg-gray-200 rounded-full h-3">
        <div
          className="bg-blue-500 h-3 rounded-full transition-all duration-300"
          style={{ width: `${progress}%` }}
        />
      </div>

      {/* 詳細統計 */}
      <div className="flex justify-center gap-4 mt-3 text-sm">
        {score.total > 0 && (
          <>
            <div className="flex items-center gap-1">
              <span className="w-2 h-2 bg-green-500 rounded-full"></span>
              <span className="text-green-700">答對 {score.correct}</span>
            </div>
            <div className="flex items-center gap-1">
              <span className="w-2 h-2 bg-red-500 rounded-full"></span>
              <span className="text-red-700">答錯 {score.total - score.correct}</span>
            </div>
          </>
        )}

        {/* 延遲統計 */}
        {delayStats && (delayStats.totalSkips > 0 || delayStats.totalWrongs > 0) && (
          <>
            {score.total > 0 && <span className="text-gray-400">|</span>}
            <div className="flex items-center gap-1">
              <span className="w-2 h-2 bg-yellow-500 rounded-full"></span>
              <span className="text-yellow-700">跳過次數 {delayStats.totalSkips}</span>
            </div>
            <div className="flex items-center gap-1">
              <span className="w-2 h-2 bg-blue-500 rounded-full"></span>
              <span className="text-blue-700">跳過卡片 {delayStats.delayedItems}</span>
            </div>
          </>
        )}
      </div>

      {/* 測驗項目順序可視化 */}
      {quizItems && currentQuizItem && (
        <div className="mt-4">
          <div className="bg-white/50 rounded-lg p-3">
            <p className="text-sm text-gray-600 mb-2">測驗項目序列 (線性流程):</p>
            <div className="flex flex-wrap gap-2">
              {quizItems.slice(0, 12).map((item) => {
                const isCompleted = item.isCompleted
                const isCurrent = item.id === currentQuizItem?.id
                const delayScore = item.skipCount + item.wrongCount

                // 狀態顏色
                let itemStyle = ''
                let statusText = ''

               if (isCompleted) {
                  itemStyle = 'bg-green-100 text-green-700 border-green-300'
                  statusText = '✓'
                } else if (delayScore > 0) {
                  if (item.skipCount > 0 && item.wrongCount > 0) {
                    itemStyle = 'bg-red-100 text-red-700 border-red-300'
                    statusText = `${item.skipCount}+${item.wrongCount}`
                  } else if (item.skipCount > 0) {
                    itemStyle = 'bg-yellow-100 text-yellow-700 border-yellow-300'
                    statusText = `跳${item.skipCount}`
                  } else {
                    itemStyle = 'bg-orange-100 text-orange-700 border-orange-300'
                    statusText = `錯${item.wrongCount}`
                  }
                } else {
                  itemStyle = 'bg-gray-100 text-gray-600 border-gray-300'
                  statusText = ''
                }

                return (
                  <div
                    key={item.id}
                    className={`px-3 py-2 rounded-lg border text-sm font-medium ${itemStyle}`}
                  >
                    <div className="flex items-center gap-1">
                      <span className="text-xs">
                        {item.quizType === 'flip-card' ? '🔄' : '🎯'}
                      </span>
                      <span>{item.cardData.word}</span>
                      {statusText && (
                        <span className="text-xs">({statusText})</span>
                      )}
                    </div>
                  </div>
                )
              })}
              {quizItems.length > 12 && (
                <div className="px-3 py-2 text-sm text-gray-500">
                  ...還有 {quizItems.length - 12} 個項目
                </div>
              )}
            </div>
            <p className="text-xs text-gray-500 mt-2 text-right">
              🟢完成、🟡跳過、🟠答錯、🔴多次&答錯、⚪待進行
            </p>
          </div>
        </div>
      )}
    </div>
  )
}