// components/auth/LoginForm.tsx
'use client';

import * as React from 'react';
import Button from '@/components/ui/Button';

type LoginValues = {
  identifier: string;
  password: string;
};

export interface LoginFormProps {
  title?: string;
  subtitle?: string;
  onSubmit?: (values: LoginValues) => void | Promise<void>;
  isSubmitting?: boolean;
  errorMessage?: string | null;
}

const LoginForm: React.FC<LoginFormProps> = ({
  title = 'Bitte melde dich an',
  subtitle,
  onSubmit,
  isSubmitting,
  errorMessage,
}) => {
  const [form, setForm] = React.useState<LoginValues>({
    identifier: '',
    password: '',
  });

  const handleChange =
    (field: keyof LoginValues) =>
    (e: React.ChangeEvent<HTMLInputElement>) => {
      const value = e.target.value;
      setForm((prev) => ({ ...prev, [field]: value }));
    };

  const handleSubmit = async (e: React.FormEvent) => {
    e.preventDefault();
    if (!onSubmit) return;
    await onSubmit(form);
  };

  return (
    <div className="flex min-h-full flex-col justify-center py-12 sm:px-6 lg:px-8">
      {/* Header */}
      <div className="sm:mx-auto sm:w-full sm:max-w-md">
        <img
          alt="Your Company"
          src="https://tailwindcss.com/plus-assets/img/logos/mark.svg?color=indigo&shade=600"
          className="mx-auto h-10 w-auto dark:hidden"
        />
        <img
          alt="Your Company"
          src="https://tailwindcss.com/plus-assets/img/logos/mark.svg?color=indigo&shade=500"
          className="mx-auto h-10 w-auto not-dark:hidden"
        />
        <h2 className="mt-6 text-center text-2xl/9 font-bold tracking-tight text-gray-900 dark:text-white">
          {title}
        </h2>
        {subtitle && (
          <p className="mt-2 text-center text-sm text-gray-500 dark:text-gray-400">
            {subtitle}
          </p>
        )}
      </div>

      {/* Card */}
      <div className="mt-10 sm:mx-auto sm:w-full sm:max-w-[480px]">
        <div className="bg-white px-6 py-12 shadow-sm sm:rounded-lg sm:px-12 dark:bg-gray-800/50 dark:shadow-none dark:outline dark:-outline-offset-1 dark:outline-white/10">
          <form className="space-y-6" onSubmit={handleSubmit}>
            {/* Benutzername / E-Mail */}
            <div>
              <label
                htmlFor="identifier"
                className="block text-sm/6 font-medium text-gray-900 dark:text-white"
              >
                NW-Kennung oder E-Mail
              </label>
              <div className="mt-2">
                <input
                  id="identifier"
                  name="identifier"
                  type="text"
                  required
                  autoComplete="username"
                  value={form.identifier}
                  onChange={handleChange('identifier')}
                  className="block w-full rounded-md bg-white px-3 py-1.5 text-base text-gray-900 outline-1 -outline-offset-1 outline-gray-300 placeholder:text-gray-400 focus:outline-2 focus:-outline-offset-2 focus:outline-indigo-600 sm:text-sm/6 dark:bg-white/5 dark:text-white dark:outline-white/10 dark:placeholder:text-gray-500 dark:focus:outline-indigo-500"
                />
              </div>
            </div>

            {/* Passwort */}
            <div>
              <label
                htmlFor="password"
                className="block text-sm/6 font-medium text-gray-900 dark:text-white"
              >
                Passwort
              </label>
              <div className="mt-2">
                <input
                  id="password"
                  name="password"
                  type="password"
                  required
                  autoComplete="current-password"
                  value={form.password}
                  onChange={handleChange('password')}
                  className="block w-full rounded-md bg-white px-3 py-1.5 text-base text-gray-900 outline-1 -outline-offset-1 outline-gray-300 placeholder:text-gray-400 focus:outline-2 focus:-outline-offset-2 focus:outline-indigo-600 sm:text-sm/6 dark:bg-white/5 dark:text-white dark:outline-white/10 dark:placeholder:text-gray-500 dark:focus:outline-indigo-500"
                />
              </div>
            </div>

            {/* Optional: Passwort vergessen Link – kannst du lassen oder entfernen */}
            <div className="flex items-center justify-end">
              <div className="text-sm/6">
                <a
                  href="#"
                  className="font-semibold text-indigo-600 hover:text-indigo-500 dark:text-indigo-400 dark:hover:text-indigo-300"
                >
                  Passwort vergessen?
                </a>
              </div>
            </div>

            {/* Error */}
            {errorMessage && (
              <p className="text-sm text-red-600 dark:text-red-400">
                {errorMessage}
              </p>
            )}

            {/* Submit */}
            <div>
              <Button
                type="submit"
                variant="primary"
                size="lg"
                className="w-full justify-center"
                disabled={isSubmitting}
              >
                {isSubmitting ? 'Wird angemeldet…' : 'Anmelden'}
              </Button>
            </div>
          </form>
        </div>
      </div>
    </div>
  );
};

export default LoginForm;