'use client';

import React, { useState, startTransition, useActionState } from 'react';
import { useRouter } from 'next/navigation';
import { loginUser } from '@/lib/actions/auth';
import { Button } from '@/components/ui/Button';
import { Input } from '@/components/ui/Input';

export default function LoginPage() {
  const router = useRouter();
  const [error, setError] = useState<string | null>(null);
  const [isLoading, setIsLoading] = useState(false);

  const handleSubmit = async (event: React.FormEvent<HTMLFormElement>) => {
    event.preventDefault();
    setIsLoading(true);
    setError(null);

    const formData = new FormData(event.currentTarget);
    const result = await loginUser(null, formData);

    if (result.success) {
      router.push('/dashboard');
      router.refresh();
    } else {
      setError(result.error || 'An unexpected error occurred');
      setIsLoading(false);
    }
  };

  return (
    <div className="min-h-screen bg-brand-background flex flex-col justify-center py-12 sm:px-6 lg:px-8">
      <div className="sm:mx-auto sm:w-full sm:max-w-md text-center">
        {/* Divine branding */}
        <div className="mx-auto h-16 w-16 rounded-full bg-brand-primary flex items-center justify-center text-white text-3xl font-bold shadow-md">
          G
        </div>
        <h2 className="mt-6 text-center text-3xl font-bold tracking-tight text-gray-900">
          GeetaShyam Satsang Parivar
        </h2>
        <p className="mt-2 text-center text-sm font-medium text-brand-secondary">
          Management Portal & CRM Directory
        </p>
      </div>

      <div className="mt-8 sm:mx-auto sm:w-full sm:max-w-md">
        <div className="bg-white py-8 px-4 shadow sm:rounded-xl sm:px-10 border border-gray-150">
          <form className="space-y-6" onSubmit={handleSubmit}>
            <div>
              <label htmlFor="email" className="block text-sm font-semibold text-gray-700">
                Administrative Email Address
              </label>
              <div className="mt-1">
                <Input
                  id="email"
                  name="email"
                  type="email"
                  autoComplete="email"
                  required
                  placeholder="name@geetashyam.guru"
                  className="w-full"
                />
              </div>
              <p className="mt-1.5 text-xs text-gray-500">
                Only verified @geetashyam.guru addresses can authenticate.
              </p>
            </div>

            <div>
              <label htmlFor="password" className="block text-sm font-semibold text-gray-700">
                Password
              </label>
              <div className="mt-1">
                <Input
                  id="password"
                  name="password"
                  type="password"
                  autoComplete="current-password"
                  required
                  placeholder="••••••••"
                  className="w-full"
                />
              </div>
            </div>

            {error && (
              <div className="rounded-md bg-red-50 p-4 border border-red-200 animate-pulse">
                <div className="flex">
                  <div className="flex-shrink-0">
                    <svg className="h-5 w-5 text-red-400" viewBox="0 0 20 20" fill="currentColor">
                      <path fillRule="evenodd" d="M10 18a8 8 0 100-16 8 8 0 000 16zM8.707 7.293a1 1 0 00-1.414 1.414L8.586 10l-1.293 1.293a1 1 0 101.414 1.414L10 11.414l1.293 1.293a1 1 0 001.414-1.414L11.414 10l1.293-1.293a1 1 0 00-1.414-1.414L10 8.586 8.707 7.293z" clipRule="evenodd" />
                    </svg>
                  </div>
                  <div className="ml-3">
                    <p className="text-sm font-medium text-red-800">{error}</p>
                  </div>
                </div>
              </div>
            )}

            <div>
              <Button
                type="submit"
                isLoading={isLoading}
                className="w-full justify-center bg-brand-primary hover:bg-brand-secondary text-white font-medium"
              >
                Sign In
              </Button>
            </div>
          </form>
        </div>
      </div>
    </div>
  );
}