import React, { useState, FormEvent } from 'react';
import { motion, AnimatePresence } from 'framer-motion';
import { Eye, EyeOff, ArrowRight } from 'lucide-react';
import { useAuthStore } from '../../application/authStore';
import { useLang } from '../../../../core/infrastructure/i18n';
import type { RegisterCredentials } from '../../domain/types';

interface Props {
  onLoginClick: () => void;
  enableRegistration?: boolean;
}

export default function RegisterForm({ onLoginClick, enableRegistration }: Props) {
  const [credentials, setCredentials] = useState<RegisterCredentials>({ username: '', displayName: '', password: '', bio: '' });
  const [showPassword, setShowPassword] = useState(false);
  const [error, setError] = useState('');
  const [isSubmitting, setIsSubmitting] = useState(false);
  
  const { register } = useAuthStore();
  const { lang } = useLang();

  if (!enableRegistration) return null;

  const handleSubmit = async (e: FormEvent) => {
    e.preventDefault();
    setError('');
    setIsSubmitting(true);

    try {
      await register(credentials.username, credentials.displayName || credentials.username, credentials.password, credentials.bio);
    } catch (err: unknown) {
      setError(err instanceof Error ? err.message : 'Ошибка');
      setIsSubmitting(false);
    }
  };

  return (
    <>
      <AnimatePresence>
        {error && (
          <motion.div
            initial={{ opacity: 0, y: -10 }}
            animate={{ opacity: 1, y: 0 }}
            exit={{ opacity: 0, y: -10 }}
            className="mb-6 p-3.5 rounded-xl bg-red-500/10 border border-red-500/20 text-red-400 text-sm font-medium text-center"
            role="alert"
          >
            {error}
          </motion.div>
        )}
      </AnimatePresence>

      <form onSubmit={handleSubmit} className="space-y-4" autoComplete="off">
        <div>
          <label className="block text-sm font-semibold text-zinc-300 mb-2">
            Username <span className="text-zinc-600 font-normal ml-1">({lang === 'ru' ? 'латиница, нельзя изменить' : 'latin, cannot change'})</span>
          </label>
          <input
            type="text"
            value={credentials.username}
            onChange={(e) => setCredentials({ ...credentials, username: e.target.value.replace(/[^a-zA-Z0-9_]/g, '') })}
            placeholder="username"
            className="w-full px-4 py-3.5 rounded-xl bg-[#18181b] border border-white/5 text-white placeholder-zinc-600 focus:border-[#9b66ff]/50 focus:bg-[#1f1f22] transition-colors outline-none text-[15px]"
            required
            autoFocus
            autoComplete="off"
          />
        </div>

        <div>
          <label className="block text-sm font-semibold text-zinc-300 mb-2">
            {lang === 'ru' ? 'Отображаемое имя' : 'Display Name'}
          </label>
          <input
            type="text"
            value={credentials.displayName}
            onChange={(e) => setCredentials({ ...credentials, displayName: e.target.value })}
            placeholder={lang === 'ru' ? 'Ваше имя (любой язык)' : 'Your name'}
            className="w-full px-4 py-3.5 rounded-xl bg-[#18181b] border border-white/5 text-white placeholder-zinc-600 focus:border-[#9b66ff]/50 focus:bg-[#1f1f22] transition-colors outline-none text-[15px]"
          />
        </div>

        <div>
          <label className="block text-sm font-semibold text-zinc-300 mb-2">
            {lang === 'ru' ? 'Пароль' : 'Password'}
          </label>
          <div className="relative">
            <input
              type={showPassword ? 'text' : 'password'}
              value={credentials.password}
              onChange={(e) => setCredentials({ ...credentials, password: e.target.value })}
              placeholder={lang === 'ru' ? 'Введите пароль' : 'Enter password'}
              className="w-full px-4 py-3.5 rounded-xl bg-[#18181b] border border-white/5 text-white placeholder-zinc-600 focus:border-[#9b66ff]/50 focus:bg-[#1f1f22] transition-colors pr-12 outline-none text-[15px]"
              required
              autoComplete="new-password"
              minLength={8}
            />
            <button
              type="button"
              onClick={() => setShowPassword(!showPassword)}
              className="absolute right-4 top-1/2 -translate-y-1/2 text-zinc-500 hover:text-zinc-300 transition-colors"
            >
              {showPassword ? <EyeOff size={18} /> : <Eye size={18} />}
            </button>
          </div>
          <p className="mt-2 text-[12px] text-zinc-500 flex items-center gap-1.5 font-medium">
            <span className="w-1 h-1 rounded-full bg-[#9b66ff]" />
            {lang === 'ru' ? 'Минимум 8 символов, буквы и цифры' : 'Minimum 8 characters, letters and numbers'}
          </p>
        </div>

        <div>
          <label className="block text-sm font-semibold text-zinc-300 mb-2">
            {lang === 'ru' ? 'О себе' : 'About me'}
          </label>
          <input
            type="text"
            value={credentials.bio}
            onChange={(e) => setCredentials({ ...credentials, bio: e.target.value })}
            placeholder={lang === 'ru' ? 'Расскажите о себе (необязательно)' : 'Tell about yourself (optional)'}
            className="w-full px-4 py-3.5 rounded-xl bg-[#18181b] border border-white/5 text-white placeholder-zinc-600 focus:border-[#9b66ff]/50 focus:bg-[#1f1f22] transition-colors outline-none text-[15px]"
          />
        </div>

        <motion.button
          whileHover={{ scale: 1.01 }}
          whileTap={{ scale: 0.99 }}
          disabled={isSubmitting}
          type="submit"
          className="w-full py-3.5 px-4 rounded-xl bg-[#8b5cf6] hover:bg-[#7c3aed] text-white font-semibold flex items-center justify-center gap-2 disabled:opacity-50 disabled:cursor-not-allowed mt-8 transition-colors text-[16px]"
          style={{ marginTop: '32px' }}
        >
          {isSubmitting ? (
            <div className="w-5 h-5 border-2 border-white/30 border-t-white rounded-full animate-spin" />
          ) : (
            <>
              {lang === 'ru' ? 'Создать аккаунт' : 'Create account'}
              <ArrowRight size={18} />
            </>
          )}
        </motion.button>
      </form>

      {enableRegistration && (
        <div className="mt-8 pt-6 border-t border-white/5 flex justify-center items-center gap-2">
          <p className="text-zinc-500 text-[13px] font-medium">
            {lang === 'ru' ? 'Уже есть аккаунт?' : 'Already have an account?'}
          </p>
          <button
            onClick={onLoginClick}
            className="text-[#7c3aed] hover:text-[#8b5cf6] text-[13px] font-semibold transition-colors"
            type="button"
          >
            {lang === 'ru' ? 'Войти' : 'Login'}
          </button>
        </div>
      )}
    </>
  );
}