'use client';

import { useCartStore } from '@/lib/cart-store';
import { useActionState, useEffect } from 'react';
import Link from 'next/link';
import { submitOrderForm } from './actions';
import { ArrowLeft, CheckCircle } from 'lucide-react';

const initialState = { success: false, message: '' };

export default function ZamowieniePage() {
  const { items, getTotal, clearCart } = useCartStore();
  const [state, formAction, pending] = useActionState(submitOrderForm, initialState);
  const total = getTotal();

  useEffect(() => {
    if (state.success) clearCart();
  }, [state.success]);

  if (items.length === 0 && !state.success) {
    return (
      <main className="min-h-screen bg-slate-50 flex items-center justify-center">
        <div className="text-center">
          <p className="text-text-muted mb-4">Koszyk jest pusty.</p>
          <Link href="/sklep"><button className="btn btn-primary text-white font-bold">Wróć do sklepu</button></Link>
        </div>
      </main>
    );
  }

  if (state.success) {
    return (
      <main className="min-h-screen bg-slate-50 flex items-center justify-center">
        <div className="text-center max-w-md px-4">
          <CheckCircle className="size-16 text-green-500 mx-auto mb-4" />
          <h1 className="text-2xl font-bold text-primary font-heading mb-2">Zamówienie przyjęte!</h1>
          <p className="text-text-muted mb-6">{state.message}</p>
          <Link href="/sklep"><button className="btn btn-primary text-white font-bold">Wróć do sklepu</button></Link>
        </div>
      </main>
    );
  }

  return (
    <main className="bg-slate-50 min-h-screen py-8">
      <div className="max-w-3xl mx-auto px-4 sm:px-6 lg:px-8">
        <Link href="/koszyk" className="inline-flex items-center gap-2 text-sm text-text-muted hover:text-accent mb-6">
          <ArrowLeft className="size-4" /> Wróć do koszyka
        </Link>

        <h1 className="text-2xl font-bold text-primary font-heading mb-8">Złóż zamówienie</h1>

        <div className="grid grid-cols-1 gap-6">
          {/* Podsumowanie produktów */}
          <div className="bg-white rounded-xl border border-border p-6">
            <h2 className="text-base font-bold text-primary font-heading mb-4">Zamawiane produkty</h2>
            <div className="flex flex-col gap-2">
              {items.map((item) => (
                <div key={item.id} className="flex justify-between text-sm">
                  <span className="text-text-muted">{item.name} × {item.quantity}</span>
                  <span className="font-semibold text-primary">{(item.price * item.quantity).toLocaleString('pl-PL')} zł</span>
                </div>
              ))}
              <div className="border-t border-border pt-2 mt-2 flex justify-between font-bold text-primary">
                <span>Łącznie (urządzenia)</span>
                <span>{total.toLocaleString('pl-PL')} zł</span>
              </div>
            </div>
          </div>

          {/* Formularz */}
          <form action={formAction} className="bg-white rounded-xl border border-border p-6 flex flex-col gap-4">
            <h2 className="text-base font-bold text-primary font-heading">Twoje dane</h2>

            {/* Hidden: produkty jako JSON */}
            <input type="hidden" name="products" value={JSON.stringify(items)} />
            <input type="hidden" name="total" value={total} />

            <div className="grid grid-cols-1 sm:grid-cols-2 gap-4">
              <div>
                <label className="text-xs font-medium text-primary mb-1 block">Imię i nazwisko *</label>
                <input name="name" required className="w-full border border-border rounded-lg px-3 py-2.5 text-sm focus:border-accent outline-none" placeholder="Jan Kowalski" />
              </div>
              <div>
                <label className="text-xs font-medium text-primary mb-1 block">Telefon *</label>
                <input name="phone" required type="tel" className="w-full border border-border rounded-lg px-3 py-2.5 text-sm focus:border-accent outline-none" placeholder="+48 600 000 000" />
              </div>
            </div>

            <div>
              <label className="text-xs font-medium text-primary mb-1 block">Email *</label>
              <input name="email" required type="email" className="w-full border border-border rounded-lg px-3 py-2.5 text-sm focus:border-accent outline-none" placeholder="jan@example.pl" />
            </div>

            <div>
              <label className="text-xs font-medium text-primary mb-1 block">Adres dostawy / montażu</label>
              <input name="address" className="w-full border border-border rounded-lg px-3 py-2.5 text-sm focus:border-accent outline-none" placeholder="ul. Przykładowa 1, 50-000 Wrocław" />
            </div>

            <div>
              <label className="text-xs font-medium text-primary mb-1 block">Uwagi do zamówienia</label>
              <textarea name="notes" rows={3} className="w-full border border-border rounded-lg px-3 py-2.5 text-sm focus:border-accent outline-none resize-none" placeholder="Np. preferowany termin montażu, piętro, specjalne wymagania..." />
            </div>

            <label className="flex items-start gap-3 cursor-pointer">
              <input type="checkbox" name="consent" required className="mt-0.5 accent-accent" />
              <span className="text-xs text-text-muted">Wyrażam zgodę na przetwarzanie danych osobowych w celu realizacji zamówienia zgodnie z Polityką Prywatności. *</span>
            </label>

            {state.message && !state.success && (
              <p className="text-sm text-red-500">{state.message}</p>
            )}

            <button type="submit" disabled={pending} className="btn btn-primary text-white font-bold w-full flex items-center justify-center gap-2">
              {pending ? 'Wysyłanie...' : 'Wyślij zamówienie'}
            </button>

            <p className="text-xs text-text-muted text-center">
              Po złożeniu zamówienia skontaktujemy się z Tobą telefonicznie w ciągu 24 godzin, aby potwierdzić szczegóły i ustalić termin montażu.
            </p>
          </form>
        </div>
      </div>
    </main>
  );
}