'use client';

import { useState } from 'react';
import { signIn } from 'next-auth/react';
import { useRouter } from 'next/navigation';
import { Shield, Mail, Lock, Loader2, AlertCircle } from 'lucide-react';
import Link from 'next/link';
import { motion } from 'framer-motion';

export default function LoginForm() {
  const router = useRouter();
  const [email, setEmail] = useState('');
  const [password, setPassword] = useState('');
  const [error, setError] = useState('');
  const [loading, setLoading] = useState(false);

  const handleSubmit = async (e: React.FormEvent) => {
    e.preventDefault();
    setError('');
    setLoading(true);
    try {
      const result = await signIn('credentials', {
        email,
        password,
        redirect: false,
      });
      if (result?.error) {
        setError(result.error);
      } else {
        router.replace('/dashboard');
      }
    } catch {
      setError('Error al iniciar sesión');
    } finally {
      setLoading(false);
    }
  };

  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 }}
        transition={{ duration: 0.5 }}
        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-white p-2 mb-2 w-full max-w-[240px]">
              <img src="/logo.png" alt="Climasan Blázquez S.L. Logo" className="w-full h-auto object-contain" />
            </div>
            <p className="text-gray-500 text-sm">Sistema de gestión y autenticación</p>
          </div>

          {error && (
            <motion.div
              initial={{ opacity: 0, scale: 0.95 }}
              animate={{ opacity: 1, scale: 1 }}
              className="flex items-center gap-2 bg-red-50 text-red-700 p-3 rounded-lg mb-4 text-sm"
            >
              <AlertCircle className="w-4 h-4 flex-shrink-0" />
              <span>{error}</span>
            </motion.div>
          )}

          <form onSubmit={handleSubmit} className="space-y-4">
            <div>
              <label className="block text-sm font-medium text-gray-700 mb-1">Email</label>
              <div className="relative">
                <Mail className="absolute left-3 top-1/2 -translate-y-1/2 w-4 h-4 text-gray-400" />
                <input
                  type="email"
                  value={email}
                  onChange={(e) => setEmail(e.target.value)}
                  placeholder="tu@email.com"
                  required
                  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">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)}
                  placeholder="••••••••"
                  required
                  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 ? 'Iniciando sesión...' : 'Iniciar sesión'}
            </button>
          </form>

          <div className="mt-4 text-center">
            <Link href="/forgot-password" className="text-sm text-[#3182ce] hover:underline">
              ¿Olvidaste tu contraseña?
            </Link>
          </div>
        </div>
      </motion.div>
    </div>
  );
}