'use client';

import { useActionState } from 'react';
import { login } from './actions';

export default function LoginPage() {
  const [state, loginAction, isPending] = useActionState(login, undefined);

  return (
    <div className="min-h-screen flex items-center justify-center bg-gradient-to-br from-blue-50 to-indigo-100 dark:from-gray-900 dark:to-gray-800 px-4">
      <div className="max-w-md w-full space-y-8 bg-white dark:bg-gray-800 p-8 rounded-2xl shadow-xl">
        <div className="text-center">
          <h1 className="text-3xl font-bold text-gray-900 dark:text-white mb-2">
            Anmeldung
          </h1>
          <p className="text-gray-600 dark:text-gray-400">
            Bitte melden Sie sich an, um fortzufahren
          </p>
        </div>

        <form action={loginAction} className="mt-8 space-y-6">
          <div className="space-y-4">
            <div>
              <label
                htmlFor="username"
                className="block text-sm font-medium text-gray-700 dark:text-gray-300 mb-1"
              >
                Benutzername
              </label>
              <input
                id="username"
                name="username"
                type="text"
                required
                autoComplete="username"
                className="appearance-none relative block w-full px-4 py-3 border border-gray-300 dark:border-gray-600 placeholder-gray-500 dark:placeholder-gray-400 text-gray-900 dark:text-white bg-white dark:bg-gray-700 rounded-lg focus:outline-none focus:ring-2 focus:ring-blue-500 focus:border-transparent transition-colors"
                placeholder="Benutzername"
                disabled={isPending}
              />
            </div>

            <div>
              <label
                htmlFor="password"
                className="block text-sm font-medium text-gray-700 dark:text-gray-300 mb-1"
              >
                Passwort
              </label>
              <input
                id="password"
                name="password"
                type="password"
                required
                autoComplete="current-password"
                className="appearance-none relative block w-full px-4 py-3 border border-gray-300 dark:border-gray-600 placeholder-gray-500 dark:placeholder-gray-400 text-gray-900 dark:text-white bg-white dark:bg-gray-700 rounded-lg focus:outline-none focus:ring-2 focus:ring-blue-500 focus:border-transparent transition-colors"
                placeholder="Passwort"
                disabled={isPending}
              />
            </div>
          </div>

          {state?.error && (
            <div className="bg-red-50 dark:bg-red-900/30 border border-red-200 dark:border-red-800 text-red-700 dark:text-red-300 px-4 py-3 rounded-lg text-sm">
              {state.error}
            </div>
          )}

          <button
            type="submit"
            disabled={isPending}
            className="w-full flex justify-center py-3 px-4 border border-transparent text-sm font-semibold rounded-lg text-white bg-blue-600 hover:bg-blue-700 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-blue-500 disabled:opacity-50 disabled:cursor-not-allowed transition-all duration-200 shadow-lg hover:shadow-xl"
          >
            {isPending ? 'Anmeldung läuft...' : 'Anmelden'}
          </button>
        </form>
      </div>
    </div>
  );
}
