import { useState } from 'react'
import { nostrAuthService } from '@/lib/nostrAuth'

interface UnlockAccountModalProps {
  onSuccess: () => void
  onClose: () => void
}

function WordInputs({
  words,
  onWordChange,
}: {
  words: string[]
  onWordChange: (index: number, value: string) => void
}) {
  return (
    <div className="grid grid-cols-2 gap-4">
      {words.map((word, index) => (
        <div key={index}>
          <label htmlFor={`word-${index}`} className="block text-sm font-medium text-gray-700 mb-2">
            Mot {index + 1}
          </label>
          <input
            id={`word-${index}`}
            type="text"
            value={word}
            onChange={(e) => onWordChange(index, e.target.value)}
            className="w-full px-3 py-2 border border-gray-300 rounded-lg font-mono text-lg text-center"
            autoComplete="off"
            autoCapitalize="off"
            autoCorrect="off"
            spellCheck="false"
          />
        </div>
      ))}
    </div>
  )
}

function useUnlockAccount(words: string[], setWords: (words: string[]) => void, setError: (error: string | null) => void) {
  const handleWordChange = (index: number, value: string) => {
    const newWords = [...words]
    newWords[index] = value.trim().toLowerCase()
    setWords(newWords)
    setError(null)
  }

  const handlePaste = async () => {
    try {
      const text = await navigator.clipboard.readText()
      const pastedWords = text.trim().split(/\s+/).slice(0, 4)
      if (pastedWords.length === 4) {
        setWords(pastedWords.map((w) => w.toLowerCase()))
        setError(null)
      }
    } catch (_e) {
      // Ignore clipboard errors
    }
  }

  return { handleWordChange, handlePaste }
}

function UnlockAccountButtons({
  loading,
  words,
  onUnlock,
  onClose,
}: {
  loading: boolean
  words: string[]
  onUnlock: () => void
  onClose: () => void
}) {
  return (
    <div className="flex gap-4">
      <button
        onClick={onClose}
        className="flex-1 py-2 px-4 bg-gray-200 hover:bg-gray-300 rounded-lg font-medium transition-colors"
      >
        Annuler
      </button>
      <button
        onClick={() => {
          void onUnlock()
        }}
        disabled={loading || words.some((word) => !word)}
        className="flex-1 py-2 px-4 bg-neon-cyan/20 hover:bg-neon-cyan/30 text-neon-cyan rounded-lg font-medium transition-all border border-neon-cyan/50 hover:shadow-glow-cyan disabled:opacity-50"
      >
        {loading ? 'Déverrouillage...' : 'Déverrouiller'}
      </button>
    </div>
  )
}

function UnlockAccountForm({
  words,
  handleWordChange,
  handlePaste,
}: {
  words: string[]
  handleWordChange: (index: number, value: string) => void
  handlePaste: () => void
}) {
  return (
    <div className="mb-4">
      <WordInputs words={words} onWordChange={handleWordChange} />
      <button
        onClick={() => {
          void handlePaste()
        }}
        className="mt-2 text-sm text-gray-600 hover:text-gray-800 underline"
      >
        Coller depuis le presse-papiers
      </button>
    </div>
  )
}

export function UnlockAccountModal({ onSuccess, onClose }: UnlockAccountModalProps) {
  const [words, setWords] = useState(['', '', '', ''])
  const [loading, setLoading] = useState(false)
  const [error, setError] = useState<string | null>(null)

  const { handleWordChange, handlePaste } = useUnlockAccount(words, setWords, setError)

  const handleUnlock = async () => {
    if (words.some((word) => !word)) {
      setError('Veuillez remplir tous les mots-clés')
      return
    }

    setLoading(true)
    setError(null)
    try {
      await nostrAuthService.unlockAccount(words)
      onSuccess()
      onClose()
    } catch (e) {
      setError(e instanceof Error ? e.message : 'Échec du déverrouillage. Vérifiez vos mots-clés.')
    } finally {
      setLoading(false)
    }
  }

  return (
    <div className="fixed inset-0 bg-black bg-opacity-50 flex items-center justify-center z-50">
      <div className="bg-white rounded-lg p-6 max-w-md w-full mx-4">
        <h2 className="text-2xl font-bold mb-4">Déverrouiller votre compte</h2>
        <p className="text-gray-600 mb-6">
          Entrez vos 4 mots-clés de récupération pour déverrouiller votre compte.
        </p>
        <UnlockAccountForm words={words} handleWordChange={handleWordChange} handlePaste={handlePaste} />
        {error && <p className="text-sm text-red-600 mb-4">{error}</p>}
        <UnlockAccountButtons loading={loading} words={words} onUnlock={handleUnlock} onClose={onClose} />
      </div>
    </div>
  )
}