'use client';

import { useState } from 'react';
import { useSearchParams } from 'next/navigation';
import { Shield, Lock, Loader2, CheckCircle, AlertCircle } from 'lucide-react';
import Link from 'next/link';
import { motion } from 'framer-motion';
import { Suspense } from 'react';

function ResetForm() {
  const searchParams = useSearchParams();
  const token = searchParams?.get('token') ?? '';
  const [password, setPassword] = useState('');
  const [confirmPassword, setConfirmPassword] = useState('');
  const [loading, setLoading] = useState(false);
  const [success, setSuccess] = useState(false);
  const [error, setError] = useState('');

  const handleSubmit = async (e: React.FormEvent) => {
    e.preventDefault();
    if (password !== confirmPassword) {
      setError('Las contraseñas no coinciden');
      return;
    }
    if (password.length < 6) {
      setError('La contraseña debe tener al menos 6 caracteres');
      return;
    }
    setError('');
    setLoading(true);
    try {
      const res = await fetch('/api/password-reset/reset', {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({ token, password }),
      });
      const data = await res.json();
      if (data?.success) {
        setSuccess(true);
      } else {
        setError(data?.error ?? 'Error al restablecer contraseña');
      }
    } catch {
      setError('Error de conexión');
    } finally {
      setLoading(false);
    }
  };

  if (!token) {
    return (
      <div className="text-center">
        <AlertCircle className="w-12 h-12 text-red-500 mx-auto mb-3" />
        <p className="text-gray-700 mb-4">Token no válido. Solicita un nuevo enlace de recuperación.</p>
        <Link href="/forgot-password" className="text-[#3182ce] hover:underline">Solicitar nuevo enlace</Link>
      </div>
    );
  }

  if (success) {
    return (
      <motion.div initial={{ opacity: 0 }} animate={{ opacity: 1 }} className="text-center">
        <CheckCircle className="w-12 h-12 text-green-500 mx-auto mb-3" />
        <p className="text-gray-700 mb-4">Contraseña actualizada correctamente.</p>
        <Link href="/login" className="bg-[#1a365d] text-white px-6 py-2 rounded-lg hover:bg-[#2c5282] transition">Ir al login</Link>
      </motion.div>
    );
  }

  return (
    <form onSubmit={handleSubmit} className="space-y-4">
      {error && <div className="bg-red-50 text-red-700 p-3 rounded-lg text-sm">{error}</div>}
      <div>
        <label className="block text-sm font-medium text-gray-700 mb-1">Nueva contraseña</label>
        <div className="relative">
          <Lock className="absolute left-3 top-1/2 -translate-y-1/2 w-4 h-4 text-gray-400" />
          <input type="password" value={password} onChange={(e) => setPassword(e.target.value)} required minLength={6}
            className="w-full pl-10 pr-4 py-2.5 border border-gray-300 rounded-lg focus:ring-2 focus:ring-[#3182ce] focus:border-transparent outline-none transition text-gray-900" />
        </div>
      </div>
      <div>
        <label className="block text-sm font-medium text-gray-700 mb-1">Confirmar contraseña</label>
        <div className="relative">
          <Lock className="absolute left-3 top-1/2 -translate-y-1/2 w-4 h-4 text-gray-400" />
          <input type="password" value={confirmPassword} onChange={(e) => setConfirmPassword(e.target.value)} required minLength={6}
            className="w-full pl-10 pr-4 py-2.5 border border-gray-300 rounded-lg focus:ring-2 focus:ring-[#3182ce] focus:border-transparent outline-none transition text-gray-900" />
        </div>
      </div>
      <button type="submit" disabled={loading} className="w-full bg-[#1a365d] hover:bg-[#2c5282] text-white py-2.5 rounded-lg font-medium transition-colors flex items-center justify-center gap-2 disabled:opacity-60">
        {loading ? <Loader2 className="w-4 h-4 animate-spin" /> : null}
        {loading ? 'Restableciendo...' : 'Restablecer contraseña'}
      </button>
    </form>
  );
}

export default function ResetPasswordForm() {
  return (
    <div className="min-h-screen flex items-center justify-center bg-gradient-to-br from-[#0f2440] via-[#1a365d] to-[#2c5282] px-4">
      <motion.div initial={{ opacity: 0, y: 30 }} animate={{ opacity: 1, y: 0 }} className="w-full max-w-md">
        <div className="bg-white rounded-lg shadow-2xl p-8">
          <div className="flex flex-col items-center mb-6">
            <div className="bg-[#1a365d] p-3 rounded-xl mb-4">
              <Shield className="w-8 h-8 text-white" />
            </div>
            <h1 className="text-xl font-bold text-[#1a365d]">Restablecer contraseña</h1>
          </div>
          <Suspense fallback={<div className="text-center text-gray-500">Cargando...</div>}>
            <ResetForm />
          </Suspense>
        </div>
      </motion.div>
    </div>
  );
}