import { useState, useEffect } from 'react';
import { useNavigate } from 'react-router-dom';
import { supabase } from '../services/supabase';
import './Login.css';

const ALLOWED_DOMAIN = '@gomezleemarketing.com';
const GLM_LOGO = 'https://dbit.digitalcompass.agency/storage/v1/object/public/public-assets/GLM_completo.png';

export default function Login() {
    const navigate = useNavigate();
    const [loading, setLoading] = useState(false);
    const [error, setError] = useState('');

    useEffect(() => {
        supabase.auth.getSession().then(({ data: { session } }) => {
            if (session?.user?.email?.endsWith(ALLOWED_DOMAIN)) {
                navigate('/empleado-id/');
            }
        });
    }, [navigate]);

    const handleGoogleLogin = async () => {
        setLoading(true);
        setError('');

        const redirectUrl = `${window.location.origin}/empleado-id/`;

        const { error: authError } = await supabase.auth.signInWithOAuth({
            provider: 'google',
            options: {
                redirectTo: redirectUrl,
                queryParams: {
                    hd: 'gomezleemarketing.com',
                },
            },
        });

        if (authError) {
            setError(authError.message);
            setLoading(false);
        }
    };

    if (loading) {
        return (
            <div className="login-page loading">
                <div className="login-card">
                    <img src={GLM_LOGO} alt="GLM" className="logo" />
                    <div className="spinner" />
                </div>
            </div>
        );
    }

    return (
        <div className="login-page">
            <div className="login-card">
                <img src={GLM_LOGO} alt="GomezLee Marketing" className="logo" />

                <h1 className="title">GLM ID Card Generator</h1>

                <div className="login-divider" />

                <button
                    className="btn-google"
                    onClick={handleGoogleLogin}
                    disabled={loading}
                >
                    <svg className="google-icon" viewBox="0 0 24 24" width="20" height="20">
                        <path
                            fill="#4285F4"
                            d="M22.56 12.25c0-.78-.07-1.53-.2-2.25H12v4.26h5.92c-.26 1.37-1.04 2.53-2.21 3.31v2.77h3.57c2.08-1.92 3.28-4.74 3.28-8.09z"
                        />
                        <path
                            fill="#34A853"
                            d="M12 23c2.97 0 5.46-.98 7.28-2.66l-3.57-2.77c-.98.66-2.23 1.06-3.71 1.06-2.86 0-5.29-1.93-6.16-4.53H2.18v2.84C3.99 20.53 7.7 23 12 23z"
                        />
                        <path
                            fill="#FBBC05"
                            d="M5.84 14.09c-.22-.66-.35-1.36-.35-2.09s.13-1.43.35-2.09V7.07H2.18C1.43 8.55 1 10.22 1 12s.43 3.45 1.18 4.93l2.85-2.22.81-.62z"
                        />
                        <path
                            fill="#EA4335"
                            d="M12 5.38c1.62 0 3.06.56 4.21 1.64l3.15-3.15C17.45 2.09 14.97 1 12 1 7.7 1 3.99 3.47 2.18 7.07l3.66 2.84c.87-2.6 3.3-4.53 6.16-4.53z"
                        />
                    </svg>
                    <span>Continuar con Google</span>
                </button>

                <p className="domain-hint">Solo cuentas @gomezleemarketing.com</p>

                {error && <div className="error-message">{error}</div>}
            </div>
        </div>
    );
}