'use client';

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

export default function LoginPage() {
  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('Invalid email or password');
      } else {
        router.replace('/dashboard');
      }
    } catch {
      setError('An error occurred');
    } finally {
      setLoading(false);
    }
  };

  return (
    <div className="min-h-screen flex items-center justify-center bg-gradient-to-b from-background to-secondary/30 px-4">
      <motion.div
        initial={{ opacity: 0, y: 20 }}
        animate={{ opacity: 1, y: 0 }}
        className="w-full max-w-md"
      >
        <div className="text-center mb-8">
          <Link href="/" className="inline-flex items-center gap-2">
            <Gauge className="w-10 h-10 text-primary" />
            <span className="font-bold text-2xl">CNC Calculator</span>
          </Link>
        </div>

        <div className="bg-card rounded-xl shadow-xl p-8">
          <h1 className="text-2xl font-bold mb-6 text-center">Welcome Back</h1>

          {error && (
            <div className="bg-destructive/20 text-red-400 p-3 rounded-lg mb-4 text-sm">
              {error}
            </div>
          )}

          <form onSubmit={handleSubmit} className="space-y-4">
            <div>
              <label className="block text-sm font-medium mb-2">Email</label>
              <div className="relative">
                <Mail className="absolute left-3 top-1/2 -translate-y-1/2 w-5 h-5 text-muted-foreground" />
                <input
                  type="email"
                  value={email}
                  onChange={(e) => setEmail(e.target.value)}
                  className="w-full pl-10 pr-4 py-3 bg-secondary rounded-lg focus:outline-none focus:ring-2 focus:ring-primary"
                  placeholder="your@email.com"
                  required
                />
              </div>
            </div>

            <div>
              <label className="block text-sm font-medium mb-2">Password</label>
              <div className="relative">
                <Lock className="absolute left-3 top-1/2 -translate-y-1/2 w-5 h-5 text-muted-foreground" />
                <input
                  type="password"
                  value={password}
                  onChange={(e) => setPassword(e.target.value)}
                  className="w-full pl-10 pr-4 py-3 bg-secondary rounded-lg focus:outline-none focus:ring-2 focus:ring-primary"
                  placeholder="••••••••"
                  required
                />
              </div>
            </div>

            <button
              type="submit"
              disabled={loading}
              className="w-full py-3 bg-primary text-primary-foreground rounded-lg font-medium hover:bg-primary/90 transition-colors disabled:opacity-50 flex items-center justify-center gap-2"
            >
              {loading ? <Loader2 className="w-5 h-5 animate-spin" /> : null}
              {loading ? 'Signing in...' : 'Sign In'}
            </button>
          </form>

          <p className="text-center text-sm text-muted-foreground mt-6">
            Don&apos;t have an account?{' '}
            <Link href="/signup" className="text-primary hover:underline">
              Sign up
            </Link>
          </p>
        </div>
      </motion.div>
    </div>
  );
}