'use client'

import React, { useState, useCallback } from 'react'

interface FlashCardProps {
  front: string
  back: string
  cardNumber: number
  totalCards: number
  leitnerBox: number
  onCorrect: () => void
  onIncorrect: () => void
  isDark: boolean
}

const boxLabels = ['Neu', 'Gelernt', 'Gefestigt']
const boxColors = ['text-yellow-400', 'text-blue-400', 'text-green-400']

export function FlashCard({
  front,
  back,
  cardNumber,
  totalCards,
  leitnerBox,
  onCorrect,
  onIncorrect,
  isDark,
}: FlashCardProps) {
  const [isFlipped, setIsFlipped] = useState(false)

  const handleFlip = useCallback(() => {
    setIsFlipped((f) => !f)
  }, [])

  const handleCorrect = useCallback(() => {
    setIsFlipped(false)
    onCorrect()
  }, [onCorrect])

  const handleIncorrect = useCallback(() => {
    setIsFlipped(false)
    onIncorrect()
  }, [onIncorrect])

  return (
    <div className="flex flex-col items-center gap-6 w-full max-w-lg mx-auto">
      {/* Card */}
      <div
        onClick={handleFlip}
        className="w-full cursor-pointer select-none"
        style={{ perspective: '1000px' }}
      >
        <div
          className="relative w-full transition-transform duration-500"
          style={{
            transformStyle: 'preserve-3d',
            transform: isFlipped ? 'rotateY(180deg)' : 'rotateY(0deg)',
          }}
        >
          {/* Front */}
          <div
            className={`w-full min-h-[280px] rounded-3xl p-8 flex flex-col items-center justify-center ${
              isDark
                ? 'bg-white/10 backdrop-blur-xl border border-white/20'
                : 'bg-white shadow-xl border border-slate-200'
            }`}
            style={{ backfaceVisibility: 'hidden' }}
          >
            <span className={`text-xs font-medium mb-4 ${isDark ? 'text-white/40' : 'text-slate-400'}`}>
              ENGLISCH
            </span>
            <span className={`text-3xl font-bold text-center ${isDark ? 'text-white' : 'text-slate-900'}`}>
              {front}
            </span>
            <span className={`text-sm mt-6 ${isDark ? 'text-white/30' : 'text-slate-400'}`}>
              Klick zum Umdrehen
            </span>
          </div>

          {/* Back */}
          <div
            className={`w-full min-h-[280px] rounded-3xl p-8 flex flex-col items-center justify-center absolute inset-0 ${
              isDark
                ? 'bg-gradient-to-br from-blue-500/20 to-cyan-500/20 backdrop-blur-xl border border-blue-400/30'
                : 'bg-gradient-to-br from-blue-50 to-cyan-50 shadow-xl border border-blue-200'
            }`}
            style={{ backfaceVisibility: 'hidden', transform: 'rotateY(180deg)' }}
          >
            <span className={`text-xs font-medium mb-4 ${isDark ? 'text-blue-300/60' : 'text-blue-500'}`}>
              DEUTSCH
            </span>
            <span className={`text-3xl font-bold text-center ${isDark ? 'text-white' : 'text-slate-900'}`}>
              {back}
            </span>
          </div>
        </div>
      </div>

      {/* Status Bar */}
      <div className={`flex items-center justify-between w-full px-2 ${isDark ? 'text-white/50' : 'text-slate-500'}`}>
        <span className="text-sm">
          Karte {cardNumber} von {totalCards}
        </span>
        <span className={`text-sm font-medium ${boxColors[leitnerBox] || boxColors[0]}`}>
          Box: {boxLabels[leitnerBox] || boxLabels[0]}
        </span>
      </div>

      {/* Progress */}
      <div className="w-full h-1.5 rounded-full bg-white/10 overflow-hidden">
        <div
          className="h-full rounded-full bg-gradient-to-r from-blue-500 to-cyan-500 transition-all"
          style={{ width: `${(cardNumber / totalCards) * 100}%` }}
        />
      </div>

      {/* Answer Buttons */}
      {isFlipped && (
        <div className="flex gap-4 w-full">
          <button
            onClick={handleIncorrect}
            className="flex-1 py-4 rounded-2xl font-semibold text-lg transition-all bg-gradient-to-r from-red-500 to-rose-500 text-white hover:shadow-lg hover:shadow-red-500/25 hover:scale-[1.02]"
          >
            Falsch
          </button>
          <button
            onClick={handleCorrect}
            className="flex-1 py-4 rounded-2xl font-semibold text-lg transition-all bg-gradient-to-r from-green-500 to-emerald-500 text-white hover:shadow-lg hover:shadow-green-500/25 hover:scale-[1.02]"
          >
            Richtig
          </button>
        </div>
      )}
    </div>
  )
}