'use client';

import { useState } from 'react';
import { useRouter } from 'next/navigation';
import { LogIn, User, Lock, AlertCircle } from 'lucide-react';

export default function LoginPage() {
    const [usuario, setUsuario] = useState('');
    const [password, setPassword] = useState('');
    const [error, setError] = useState('');
    const [loading, setLoading] = useState(false);
    const router = useRouter();

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

        try {
            const res = await fetch('/api/auth/login', {
                method: 'POST',
                headers: { 'Content-Type': 'application/json' },
                body: JSON.stringify({ usuario, password }),
            });

            if (res.ok) {
                router.push('/');
                router.refresh();
            } else {
                const data = await res.json();
                setError(data.message || 'Error al iniciar sesión');
            }
        } catch (err) {
            setError('Error de conexión');
        } finally {
            setLoading(false);
        }
    };

    return (
        <div className="flex min-h-screen items-center justify-center bg-background">
            <div className="w-full max-w-md space-y-8 rounded-2xl border border-border bg-card p-10 shadow-xl">
                <div className="text-center">
                    <div className="mx-auto flex h-12 w-12 items-center justify-center rounded-full bg-primary/10 text-primary">
                        <LogIn className="h-6 w-6" />
                    </div>
                    <h2 className="mt-6 text-3xl font-extrabold tracking-tight">FormaGest</h2>
                    <p className="mt-2 text-sm text-muted-foreground">Acceda a su panel de gestión</p>
                </div>

                <form className="mt-8 space-y-6" onSubmit={handleSubmit}>
                    <div className="space-y-4 rounded-md shadow-sm">
                        <div className="relative">
                            <div className="pointer-events-none absolute inset-y-0 left-0 flex items-center pl-3">
                                <User className="h-5 w-5 text-muted-foreground" />
                            </div>
                            <input
                                type="text"
                                required
                                className="block w-full rounded-lg border border-input bg-background py-3 pl-10 pr-3 focus:outline-none focus:ring-2 focus:ring-primary/20"
                                placeholder="Usuario"
                                value={usuario}
                                onChange={(e) => setUsuario(e.target.value)}
                            />
                        </div>
                        <div className="relative">
                            <div className="pointer-events-none absolute inset-y-0 left-0 flex items-center pl-3">
                                <Lock className="h-5 w-5 text-muted-foreground" />
                            </div>
                            <input
                                type="password"
                                required
                                className="block w-full rounded-lg border border-input bg-background py-3 pl-10 pr-3 focus:outline-none focus:ring-2 focus:ring-primary/20"
                                placeholder="Contraseña"
                                value={password}
                                onChange={(e) => setPassword(e.target.value)}
                            />
                        </div>
                    </div>

                    {error && (
                        <div className="flex items-center space-x-2 text-sm text-red-500 bg-red-50 dark:bg-red-900/10 p-3 rounded-lg border border-red-200 dark:border-red-900/50">
                            <AlertCircle className="h-4 w-4" />
                            <span>{error}</span>
                        </div>
                    )}

                    <div>
                        <button
                            type="submit"
                            disabled={loading}
                            className="group relative flex w-full justify-center rounded-lg bg-primary py-3 text-sm font-semibold text-primary-foreground hover:bg-primary/90 focus:outline-none focus:ring-2 focus:ring-primary focus:ring-offset-2 disabled:opacity-50 transition-all"
                        >
                            {loading ? 'Iniciando sesión...' : 'Iniciar Sesión'}
                        </button>
                    </div>
                </form>
            </div>
        </div>
    );
}