'use client';

import { useState, useEffect } from 'react';
import Link from 'next/link';
import { useConsentStore } from '@/lib/consent-store';

interface CookiePreferences {
  necessary: boolean;
  analytics: boolean;
  marketing: boolean;
  advertising: boolean;
}

export default function CookieBanner() {
  const { 
    isInitialized, 
    isOpen, 
    analytics, 
    marketing, 
    advertising, 
    setConsent, 
    acceptAll: storeAcceptAll, 
    rejectOptional: storeRejectOptional 
  } = useConsentStore();
  
  const [showDetails, setShowDetails] = useState(false);
  const [prefs, setPrefs] = useState<CookiePreferences>({
    necessary: true,
    analytics: true,
    marketing: true,
    advertising: true,
  });

  useEffect(() => {
    useConsentStore.getState().initialize();
  }, []);

  useEffect(() => {
    if (isOpen) {
      const timer = setTimeout(() => {
        setPrefs({
          necessary: true,
          analytics: analytics,
          marketing: marketing,
          advertising: advertising,
        });
        setShowDetails(false);
      }, 0);
      return () => clearTimeout(timer);
    }
  }, [isOpen, analytics, marketing, advertising]);

  const saveSelected = () => {
    setConsent(prefs.analytics, prefs.marketing, prefs.advertising);
  };

  if (!isInitialized || !isOpen) return null;

  return (
    <div className="fixed bottom-0 left-0 right-0 z-[100] p-0 sm:p-6">
      <div className="max-w-4xl mx-auto bg-white sm:rounded-2xl shadow-[0_-4px_20px_rgba(0,0,0,0.1)] sm:shadow-2xl border-t sm:border border-border overflow-hidden pb-safe sm:pb-0">
        {/* Główny pasek */}
        <div className="p-4 sm:p-6">
          <div className="flex items-start gap-3 mb-3 sm:mb-4">
            <span className="hidden sm:block text-2xl shrink-0">🍪</span>
            <div>
              <h2 className="text-sm sm:text-base font-extrabold text-primary font-heading mb-1">
                Ta strona używa plików cookie
              </h2>
              <p className="text-xs sm:text-sm text-text-muted leading-relaxed">
                Używamy plików cookie, aby zapewnić prawidłowe działanie strony, analizować ruch
                i dostosowywać treści. Możesz wybrać które kategorie akceptujesz.{' '}
                <Link href="/polityka-prywatnosci" className="text-accent underline hover:no-underline">
                  Polityka prywatności
                </Link>
              </p>
            </div>
          </div>

          {/* Szczegóły */}
          {showDetails && (
            <div className="flex flex-col gap-3 mb-5 p-4 bg-slate-50 rounded-xl">
              {/* Niezbędne */}
              <div className="flex items-start justify-between gap-4">
                <div>
                  <p className="text-sm font-semibold text-primary">Niezbędne</p>
                  <p className="text-xs text-text-muted mt-0.5">
                    Wymagane do prawidłowego działania strony. Nie można wyłączyć.
                  </p>
                </div>
                <div className="shrink-0">
                  <div className="w-11 h-6 bg-accent rounded-full relative cursor-not-allowed opacity-60">
                    <div className="absolute right-1 top-1 size-4 bg-white rounded-full" />
                  </div>
                </div>
              </div>

              {/* Analityczne */}
              <div className="flex items-start justify-between gap-4 border-t border-border pt-3">
                <div>
                  <p className="text-sm font-semibold text-primary">Analityczne</p>
                  <p className="text-xs text-text-muted mt-0.5">
                    Google Analytics — pomagają nam zrozumieć jak użytkownicy korzystają ze strony. Dane są anonimowe.
                  </p>
                </div>
                <button
                  onClick={() => setPrefs(p => ({ ...p, analytics: !p.analytics }))}
                  className="shrink-0"
                >
                  <div className={`w-11 h-6 rounded-full relative transition-colors ${prefs.analytics ? 'bg-accent' : 'bg-slate-300'}`}>
                    <div className={`absolute top-1 size-4 bg-white rounded-full transition-all ${prefs.analytics ? 'right-1' : 'left-1'}`} />
                  </div>
                </button>
              </div>

              {/* Marketingowe */}
              <div className="flex items-start justify-between gap-4 border-t border-border pt-3">
                <div>
                  <p className="text-sm font-semibold text-primary">Marketingowe</p>
                  <p className="text-xs text-text-muted mt-0.5">
                    Google Ads, Facebook Ads — pozwalają mierzyć skuteczność kampanii i docierać do odpowiednich odbiorców.
                  </p>
                </div>
                <button
                  onClick={() => setPrefs(p => ({ ...p, marketing: !p.marketing }))}
                  className="shrink-0"
                >
                  <div className={`w-11 h-6 rounded-full relative transition-colors ${prefs.marketing ? 'bg-accent' : 'bg-slate-300'}`}>
                    <div className={`absolute top-1 size-4 bg-white rounded-full transition-all ${prefs.marketing ? 'right-1' : 'left-1'}`} />
                  </div>
                </button>
              </div>

              {/* Reklamowe */}
              <div className="flex items-start justify-between gap-4 border-t border-border pt-3">
                <div>
                  <p className="text-sm font-semibold text-primary">Reklamowe</p>
                  <p className="text-xs text-text-muted mt-0.5">
                    Meta Pixel, Google Ads — umożliwiają wyświetlanie spersonalizowanych reklam na platformach takich jak Facebook, Instagram i Google.
                  </p>
                </div>
                <button
                  onClick={() => setPrefs(p => ({ ...p, advertising: !p.advertising }))}
                  className="shrink-0"
                >
                  <div className={`w-11 h-6 rounded-full relative transition-colors ${prefs.advertising ? 'bg-accent' : 'bg-slate-300'}`}>
                    <div className={`absolute top-1 size-4 bg-white rounded-full transition-all ${prefs.advertising ? 'right-1' : 'left-1'}`} />
                  </div>
                </button>
              </div>
            </div>
          )}

          {/* Przyciski */}
          <div className="grid grid-cols-2 sm:flex sm:flex-row items-stretch sm:items-center gap-2">
            <button
              onClick={storeAcceptAll}
              className="col-span-2 sm:col-span-1 flex-1 sm:flex-none px-4 py-2 sm:px-5 sm:py-2.5 bg-accent text-white font-bold rounded-xl text-xs sm:text-sm hover:bg-accent/90 transition-colors min-h-[44px]"
            >
              Akceptuj wszystkie
            </button>
            <button
              onClick={storeRejectOptional}
              className="col-span-1 flex-1 sm:flex-none px-4 py-2 sm:px-5 sm:py-2.5 bg-slate-100 text-primary font-bold rounded-xl text-xs sm:text-sm hover:bg-slate-200 transition-colors min-h-[44px]"
            >
              Odrzuć
            </button>
            {showDetails ? (
              <button
                onClick={saveSelected}
                className="col-span-1 flex-1 sm:flex-none px-4 py-2 sm:px-5 sm:py-2.5 bg-white border border-border text-primary font-bold rounded-xl text-xs sm:text-sm hover:border-accent transition-colors min-h-[44px]"
              >
                Zapisz
              </button>
            ) : (
              <button
                onClick={() => setShowDetails(true)}
                className="col-span-1 flex-1 sm:flex-none px-4 py-2 sm:px-5 sm:py-2.5 bg-white border border-border text-primary font-bold rounded-xl text-xs sm:text-sm hover:border-accent transition-colors min-h-[44px]"
              >
                Dostosuj
              </button>
            )}
          </div>
        </div>
      </div>
    </div>
  );
}