'use client';

import { useState, useEffect, useMemo } from 'react';
import Link from 'next/link';

import { ArrowRight, ArrowLeft, Check, Home, Zap, ShoppingCart, Phone } from 'lucide-react';
import { Product } from '@/content/products';
import { companyDetails } from '@/content/company';
import { Button, buttonClasses } from '@/components/ui/Button';


interface Props {
  products: Product[];
}

// Hook do zapisywania stanu w sessionStorage
function useSessionState<T>(key: string, initialValue: T) {
  const [state, setState] = useState<T>(initialValue);

  useEffect(() => {
    try {
      const item = window.sessionStorage.getItem(key);
      if (item) {
        const timer = setTimeout(() => setState(JSON.parse(item)), 0);
        return () => clearTimeout(timer);
      }
    } catch {}
  }, [key]);

  const setValue = (value: T | ((val: T) => T)) => {
    try {
      const valueToStore = value instanceof Function ? value(state) : value;
      setState(valueToStore);
      if (typeof window !== 'undefined') {
        window.sessionStorage.setItem(key, JSON.stringify(valueToStore));
      }
    } catch {}
  };

  return [state, setValue] as const;
}

// Oblicz wymaganą moc chłodniczą w kW
function calculatePower(m2: number, floor: string, sun: string, building: string): number {
  let power = m2 * 0.1; // baza: 1 kW na 10 m²

  // Korekta typu budynku i piętra
  if (building === 'apartment') {
    if (floor === 'top') power *= 1.2; // ostatnie piętro - więcej ciepła z dachu
    if (floor === 'ground') power *= 0.95;
  } else if (building === 'house') {
    if (floor === 'top') power *= 1.1; // poddasze - dodatkowe nagrzewanie
  }

  // Korekta nasłonecznienia
  if (sun === 'south') power *= 1.15; // południe - duże nasłonecznienie
  if (sun === 'west') power *= 1.1;
  if (sun === 'north') power *= 0.9;

  return Math.round(power * 10) / 10;
}

// Szacunkowy koszt montażu
function estimateInstall(pipes: string, rooms: number, installMethod: string): { min: number; max: number } {
  const base = rooms === 1 ? 1400 : rooms === 2 ? 2400 : rooms === 3 ? 3200 : 3800;
  // Przybliżona liczba dodatkowych metrów (powyżej 3m)
  const extraMeters = pipes === 'short' ? 0 : pipes === 'medium' ? 3 : pipes === 'long' ? 7 : 15;
  const methodPrice = installMethod === 'bruzda' ? 90 : 80; // zł za metr
  // Zostawmy bazowe koszty rur miedzianych (np. miedź, kable) i dodajmy koszt bruzdy/korytka
  const pipeBaseCost = pipes === 'short' ? 0 : pipes === 'medium' ? 200 : pipes === 'long' ? 500 : 1000;
  
  const pipeExtra = pipeBaseCost + (extraMeters * methodPrice);
  return { min: base + pipeExtra, max: base + pipeExtra + 600 };
}
const STEPS = ['Pomieszczenie', 'Instalacja', 'Budżet'] as const;
export function KalkulatorClient({ products }: Props) {
  const [showWidthWarning, setShowWidthWarning] = useState(false);
  const [maxWidth, setMaxWidth] = useState(80);
        const [step, setStep] = useSessionState('calc_step', 0);
  const [building, setBuilding] = useSessionState('calc_building', 'apartment');
  const [pomieszczenia, setPomieszczenia] = useSessionState<{ nazwa: string; m2: number }[]>('calc_pomieszczenia', [
    { nazwa: 'Pokój 1', m2: 20 }
  ]);
  const [floor, setFloor] = useSessionState('calc_floor', 'middle'); // ground | middle | top
  const [sun, setSun] = useSessionState('calc_sun', 'south'); // north | east | south | west

  const addRoom = () => {
    if (pomieszczenia.length < 5) {
      setPomieszczenia(prev => [...prev, { nazwa: `Pokój ${prev.length + 1}`, m2: 15 }]);
    }
  };

  const removeRoom = (i: number) => {
    if (pomieszczenia.length > 1) {
      setPomieszczenia(prev => prev.filter((_, idx) => idx !== i));
    }
  };

  const updateRoom = (i: number, m2: number) => {
    setPomieszczenia(prev => prev.map((r, idx) => idx === i ? { ...r, m2 } : r));
  };
  const [pipes, setPipes] = useSessionState('calc_pipes', 'medium'); // short(<3m) | medium(3-6m) | long(6-10m) | verylong(>10m)
  const [installMethod, setInstallMethod] = useSessionState<'korytko' | 'bruzda'>('calc_installMethod', 'korytko');

  const [budget, setBudget] = useSessionState('calc_budget', 8000);
  const [preferredBrand, setPreferredBrand] = useSessionState('calc_brand', '');
  const [energyClass, setEnergyClass] = useSessionState('calc_energy', '');

  const [page, setPage] = useSessionState('calc_page', 1);

  const totalM2 = pomieszczenia.reduce((sum, p) => sum + p.m2, 0);
  const rooms = pomieszczenia.length;
  const requiredPower = useMemo(() => 
    pomieszczenia.reduce((sum, p) => sum + calculatePower(p.m2, floor, sun, building), 0),
    [pomieszczenia, floor, sun, building]
  );
  const requiredPowerRounded = Math.round(requiredPower * 10) / 10;
  const installCost = useMemo(() => estimateInstall(pipes, rooms, installMethod), [pipes, rooms, installMethod]);
  
  const category = rooms === 1 ? 'scienne' : 'multisplit';


  const handleNext = () => {
    setStep(s => s + 1);
    setPage(1);
    window.scrollTo({ top: 0, behavior: 'smooth' });
  };

  const getShopUrl = () => {
    const params = new URLSearchParams();
    if (category) params.set('category', category);
    if (preferredBrand) params.set('brand', preferredBrand);
    
    const avgInstallCost = (installCost.min + installCost.max) / 2;
    const deviceBudget = Math.max(0, budget - avgInstallCost);
    if (deviceBudget > 0) params.set('priceMax', Math.round(deviceBudget).toString());

    if (category === 'scienne') {
      if (requiredPowerRounded <= 2.5) params.set('room', 'Do 25 m²');
      else if (requiredPowerRounded <= 3.5) params.set('room', '25-35 m²');
      else if (requiredPowerRounded <= 5.0) params.set('room', '35-50 m²');
      else params.set('room', 'Powyżej 50 m²');
    } else if (category === 'multisplit') {
      params.set('units', rooms.toString());
    }

    return `/sklep?${params.toString()}`;
  };

  return (
    <main className="bg-slate-50 min-h-screen py-12">
      <div className={`mx-auto px-4 sm:px-6 transition-all duration-500 ${step === 3 ? 'max-w-5xl' : 'max-w-2xl'}`}>
        <div className="text-center mb-8">
          <h1 className="text-3xl font-extrabold text-primary font-heading mb-2">
            Dobierz urządzenie
          </h1>
          <p className="text-text-muted">Odpowiedz na {STEPS.length} krótkich pytań — pokażemy Ci najlepsze opcje z naszej oferty</p>
        </div>
        <div className="flex items-center mb-8">
          {STEPS.map((s, i) => (
            <div key={s} className="flex items-start flex-1 last:flex-none">
              <div className="flex flex-col items-center gap-1">
                <div className={`size-7 rounded-full flex items-center justify-center text-xs font-bold shrink-0 transition-all ${
                  i < step ? 'bg-green-500 text-white' : i === step ? 'bg-accent text-white' : 'bg-slate-200 text-text-muted'
                }`}>
                  {i < step ? <Check className="size-3.5" /> : i + 1}
                </div>
                <span className={`text-xs font-medium hidden sm:block whitespace-nowrap ${i === step ? 'text-accent' : 'text-text-muted'}`}>{s}</span>
              </div>
              {i < STEPS.length - 1 && (
                <div className={`flex-1 h-0.5 mx-2 mt-[13px] ${i < step ? 'bg-green-500' : 'bg-slate-200'}`} />
              )}
            </div>
          ))}
        </div>
        <div className="bg-white rounded-2xl border border-border p-6 md:p-8">
          {step === 0 && (
            <div className="flex flex-col gap-6">
              <div className="flex items-center gap-3 mb-2">
                <div className="size-10 rounded-xl bg-blue-50 flex items-center justify-center">
                  <Home className="size-5 text-blue-600" />
                </div>
                <div>
                  <h2 className="text-lg font-bold text-primary font-heading">Pomieszczenie</h2>
                  <p className="text-xs text-text-muted">Metraż i warunki</p>
                </div>
              </div>
              <div className="flex flex-col gap-3">
                {pomieszczenia.map((p, i) => (
                  <div key={i} className="bg-slate-50 rounded-xl border border-border p-4">
                    <div className="flex items-center justify-between mb-3">
                      <span className="text-sm font-semibold text-primary">{p.nazwa}</span>
                      {pomieszczenia.length > 1 && (
                        <button
                          onClick={() => removeRoom(i)}
                          className="text-xs text-red-400 hover:text-red-600 transition-colors"
                        >
                          Usuń
                        </button>
                      )}
                    </div>
                    <div className="flex flex-col gap-1.5">
                      <div className="flex items-center justify-between">
                        <span className="text-xs text-text-muted">Powierzchnia</span>
                        <span className="text-xs font-bold text-primary bg-accent/10 px-2 py-0.5 rounded-md">{p.m2} m²</span>
                      </div>
                      <input
                          type="range" min={5} max={100} step={5} value={p.m2}
                          onChange={e => updateRoom(i, Number(e.target.value))}
                          className="range range-xs range-accent w-full"
                        />
                      <div className="flex justify-between text-xs text-text-muted">
                        <span>5 m²</span>
                        <span>100 m²</span>
                      </div>
                      {(() => {
                        const mocPokoju = Math.round(calculatePower(p.m2, floor, sun, building) * 10) / 10;
                        const dostepneMoce = [2.5, 3.5, 5.0, 7.0];
                        const zalecana = dostepneMoce.reduce((prev, curr) =>
                          Math.abs(curr - mocPokoju) < Math.abs(prev - mocPokoju) ? curr : prev
                        );
                        return (
                          <div className="mt-2 flex items-center justify-between bg-white border border-border rounded-lg px-3 py-2">
                            <span className="text-xs text-text-muted">Zalecana moc jednostki</span>
                            <span className="text-sm font-bold text-accent">{zalecana} kW</span>
                          </div>
                        );
                      })()}
                    </div>
                  </div>
                ))}
              </div>

              {pomieszczenia.length < 5 && (
                <button
                  onClick={addRoom}
                  className="flex items-center gap-2 text-sm text-accent font-semibold hover:text-accent/80 transition-colors border border-dashed border-accent/40 rounded-xl px-4 py-3 w-full justify-center"
                >
                  + Dodaj kolejne pomieszczenie
                </button>
              )}
              <div className="bg-slate-50 border border-border rounded-xl p-4">
                <div className="flex items-start justify-between gap-3 mb-2">
                  <div>
                    <p className="text-sm font-semibold text-primary">Ograniczenie szerokości jednostki?</p>
                    <p className="text-xs text-text-muted mt-0.5">Np. wąska ściana, wnęka, szafa</p>
                  </div>
                  <button
                    onClick={() => setShowWidthWarning(prev => !prev)}
                    className={`shrink-0 text-xs font-bold px-3 py-1.5 rounded-lg transition-colors ${
                      showWidthWarning ? 'bg-amber-100 text-amber-700' : 'bg-slate-200 text-slate-600 hover:bg-slate-300'
                    }`}
                  >
                    {showWidthWarning ? 'Tak, mam ograniczenie' : 'Nie dotyczy'}
                  </button>
                </div>
                {showWidthWarning && (
                  <div className="mt-3">
                    <div className="flex items-center justify-between mb-1.5">
                      <span className="text-xs text-text-muted">Maksymalna szerokość jednostki</span>
                      <span className="text-xs font-bold text-amber-700 bg-amber-100 px-2 py-0.5 rounded-md">{maxWidth} cm</span>
                    </div>
                    <div className="relative h-5 flex items-center">
                      <div className="absolute w-full h-1.5 bg-slate-200 rounded-full" />
                      <div
                        className="absolute h-1.5 bg-amber-400 rounded-full"
                        style={{ width: `${((maxWidth - 40) / 80) * 100}%` }}
                      />
                      <input
                        type="range" min={40} max={120} step={5} value={maxWidth}
                        onChange={e => setMaxWidth(Number(e.target.value))}
                        className="absolute w-full h-1.5 opacity-0 cursor-pointer z-10"
                      />
                      <div
                        className="absolute size-4 bg-white border-2 border-amber-400 rounded-full shadow-md pointer-events-none"
                        style={{ left: `calc(${((maxWidth - 40) / 80) * 100}% - 8px)` }}
                      />
                    </div>
                    <div className="flex justify-between text-xs text-text-muted mt-1">
                      <span>40 cm</span>
                      <span>120 cm</span>
                    </div>
                    <div className="mt-3 flex items-start gap-2 p-3 bg-amber-50 border border-amber-200 rounded-xl">
                      <span className="text-amber-500 text-base shrink-0">⚠️</span>
                      <p className="text-xs text-amber-800 leading-relaxed">
                        Standardowe jednostki split mają <strong>70–110 cm szerokości</strong>. 
                        {maxWidth < 70 && ' Przy tak małej przestrzeni wybór jest bardzo ograniczony — '}
                        {maxWidth >= 70 && maxWidth < 85 && ' Przy tej szerokości dostępne są kompaktowe modele — '}
                        {maxWidth >= 85 && ' Większość modeli powinna się zmieścić — '}
                        skonsultuj wymiary konkretnego modelu przed zakupem.
                        <a href="/kontakt" className="ml-1 font-bold text-amber-700 underline">Zapytaj nas →</a>
                      </p>
                    </div>
                  </div>
                )}
              </div>

              <div className="p-3 bg-accent/10 rounded-xl">
                <p className="text-sm text-accent font-semibold">
                  Łączna wymagana moc: ok. <strong>{requiredPowerRounded} kW</strong>
                  <span className="text-xs font-normal text-text-muted ml-2">
                    ({pomieszczenia.length === 1 ? 'klimatyzator split' : `multisplit ${pomieszczenia.length}+1`}, łącznie {totalM2} m²)
                  </span>
                </p>
              </div>

              <div>
                <label className="text-sm font-semibold text-primary mb-3 block">Typ budynku</label>
                <div className="grid grid-cols-2 gap-2">
                  {[
                    { value: 'apartment', label: '🏢 Mieszkanie w bloku', sub: 'Kamienica, wieżowiec, blok' },
                    { value: 'house', label: '🏠 Dom jednorodzinny', sub: 'Wolnostojący, szeregowiec, bliźniak' },
                  ].map(o => (
                    <button key={o.value} onClick={() => setBuilding(o.value)}
                      className={`p-4 rounded-xl border-2 text-left transition-all ${building === o.value ? 'border-accent bg-accent/5' : 'border-border hover:border-accent'}`}>
                      <p className="text-sm font-bold text-primary">{o.label}</p>
                      <p className="text-xs text-text-muted">{o.sub}</p>
                    </button>
                  ))}
                </div>
              </div>

              {building === 'house' && (
                <div>
                  <label className="text-sm font-semibold text-primary mb-3 block">Typ przestrzeni</label>
                  <div className="grid grid-cols-2 gap-2">
                    {[
                      { value: 'ground', label: '🏠 Parter' },
                      { value: 'top', label: '🏠 Piętro / poddasze' },
                    ].map(o => (
                      <button key={o.value} onClick={() => setFloor(o.value)}
                        className={`py-2.5 px-3 rounded-xl text-sm font-semibold border-2 transition-all ${floor === o.value ? 'border-accent bg-accent text-white' : 'border-border bg-white text-primary hover:border-accent'}`}>
                        {o.label}
                      </button>
                    ))}
                  </div>
                </div>
              )}

              {building === 'apartment' && (
                <div>
                  <label className="text-sm font-semibold text-primary mb-3 block">Piętro</label>
                  <div className="flex flex-wrap gap-2">
                    {[
                      { value: 'ground', label: 'Parter' },
                      { value: 'low', label: '1-3 piętro' },
                      { value: 'middle', label: '4-8 piętro' },
                      { value: 'high', label: '9+ piętro' },
                      { value: 'top', label: 'Ostatnie' },
                    ].map(o => (
                      <button key={o.value} onClick={() => setFloor(o.value)}
                        className={`py-2 px-4 rounded-xl text-sm font-semibold border-2 transition-all ${floor === o.value ? 'border-accent bg-accent text-white' : 'border-border bg-white text-primary hover:border-accent'}`}>
                        {o.label}
                      </button>
                    ))}
                  </div>
                </div>
              )}

              <div>
                <label className="text-sm font-semibold text-primary mb-3 block">Ekspozycja okien</label>
                <div className="grid grid-cols-2 gap-2">
                  {[
                    { value: 'north', label: '🧭 Północ (chłodna)' },
                    { value: 'east', label: '🧭 Wschód' },
                    { value: 'west', label: '🧭 Zachód' },
                    { value: 'south', label: '🧭 Południe (mocne słońce)' },
                  ].map(o => (
                    <button key={o.value} onClick={() => setSun(o.value)}
                      className={`py-2.5 px-3 rounded-xl text-sm font-semibold border-2 transition-all ${sun === o.value ? 'border-accent bg-accent text-white' : 'border-border bg-white text-primary hover:border-accent'}`}>
                      {o.label}
                    </button>
                  ))}
                </div>
              </div>
            </div>
          )}
          {step === 1 && (
            <div className="flex flex-col gap-6">
              <div className="flex items-center gap-3 mb-2">
                <div className="size-10 rounded-xl bg-orange-50 flex items-center justify-center">
                  <Zap className="size-5 text-orange-600" />
                </div>
                <div>
                  <h2 className="text-lg font-bold text-primary font-heading">Długość instalacji</h2>
                  <p className="text-xs text-text-muted">Rury i kable między jednostkami</p>
                </div>
              </div>

              <div className="flex flex-col gap-3">
                {[
                  { value: 'short', label: 'Do 3 metrów', sub: 'Jednostka zewnętrzna tuż obok (balkon, taras)' },
                  { value: 'medium', label: '3–6 metrów', sub: 'Typowa instalacja w bloku lub domu' },
                  { value: 'long', label: '6–10 metrów', sub: 'Dłuższa trasa, np. przez kilka pomieszczeń' },
                  { value: 'verylong', label: 'Powyżej 10 metrów', sub: 'Bardzo długa trasa, wymaga dodatkowych materiałów' },
                ].map(o => (
                  <button key={o.value} onClick={() => setPipes(o.value)}
                    className={`p-4 rounded-xl border-2 text-left transition-all ${pipes === o.value ? 'border-accent bg-accent/5' : 'border-border hover:border-accent'}`}>
                    <p className="text-sm font-bold text-primary">{o.label}</p>
                    <p className="text-xs text-text-muted">{o.sub}</p>
                  </button>
                ))}
              </div>

              <div>
                <label className="text-sm font-semibold text-primary mb-3 block">Sposób prowadzenia instalacji (powyżej 3m)</label>
                <div className="flex flex-col gap-3">
                  {[
                    { value: 'korytko', label: 'Korytko PCV', sub: 'Rury schowane w białym korytku (80 zł/mb)' },
                    { value: 'bruzda', label: 'Bruzda w ścianie', sub: 'Rury ukryte w wykutej bruzdzie (90 zł/mb)' },
                  ].map(o => (
                    <button key={o.value} onClick={() => setInstallMethod(o.value as 'korytko' | 'bruzda')}
                      className={`p-4 rounded-xl border-2 text-left transition-all ${installMethod === o.value ? 'border-accent bg-accent/5' : 'border-border hover:border-accent'}`}>
                      <p className="text-sm font-bold text-primary">{o.label}</p>
                      <p className="text-xs text-text-muted">{o.sub}</p>
                    </button>
                  ))}
                </div>
              </div>


              <div className="p-3 bg-orange-50 rounded-xl text-xs text-orange-700">
                Szacowany koszt montażu dla Twojej konfiguracji:
                <strong className="ml-1">{installCost.min.toLocaleString('pl-PL')}–{installCost.max.toLocaleString('pl-PL')} zł</strong>
              </div>

              <div className="mt-3 p-4 bg-blue-50 border border-blue-200 rounded-xl">
                <p className="text-sm font-semibold text-blue-900 mb-1">📐 Chcesz dokładną wycenę?</p>
                <p className="text-xs text-blue-800 leading-relaxed">
                  Skontaktuj się z nami — wycena jest <strong>bezpłatna i niezobowiązująca</strong>. 
                  Aby przyspieszyć wycenę, wyślij nam zdjęcia:
                </p>
                <ul className="mt-2 flex flex-col gap-1">
                  {[
                    'Miejsca gdzie ma wisieć jednostka wewnętrzna',
                    'Ściany przez które przejdzie instalacja',
                    'Miejsca gdzie stanie jednostka zewnętrzna',
                    'Skrzynki elektrycznej (bezpieczniki)',
                  ].map((item, i) => (
                    <li key={i} className="flex items-start gap-2 text-xs text-blue-800">
                      <span className="text-blue-500 shrink-0">→</span>
                      {item}
                    </li>
                  ))}
                </ul>
                <a href="/kontakt" className="mt-3 inline-flex items-center gap-1.5 text-xs font-bold text-white bg-accent px-3 py-1.5 rounded-lg hover:bg-accent/90 transition-colors">
                  Wyślij zdjęcia i zapytaj o wycenę →
                </a>
              </div>
            </div>
          )}
          {step === 2 && (
            <div className="flex flex-col gap-6">
              <div className="flex items-center gap-3 mb-2">
                <div className="size-10 rounded-xl bg-green-50 flex items-center justify-center">
                  <ShoppingCart className="size-5 text-green-600" />
                </div>
                <div>
                  <h2 className="text-lg font-bold text-primary font-heading">Całkowity budżet</h2>
                  <p className="text-xs text-text-muted">Urządzenie + montaż łącznie</p>
                </div>
              </div>

              <div className="flex flex-col gap-1.5">
                <div className="flex items-center justify-between">
                  <span className="text-xs text-text-muted">Budżet</span>
                  <span className="text-xs font-bold text-primary bg-accent/10 px-2 py-0.5 rounded-md">{budget.toLocaleString('pl-PL')} zł</span>
                </div>
                <input
                    type="range" min={3000} max={25000} step={500} value={budget}
                    onChange={e => setBudget(Number(e.target.value))}
                    className="range range-xs range-accent w-full"
                  />
                <div className="flex justify-between text-xs text-text-muted">
                  <span>3 000 zł</span>
                  <span>25 000 zł</span>
                </div>
              </div>

              <div className="grid grid-cols-2 gap-3">
                <div className="bg-slate-50 rounded-xl p-3">
                  <p className="text-xs text-text-muted mb-1">Na urządzenie zostaje</p>
                  <p className="text-base font-bold text-primary font-heading">
                    ok. {(budget * 0.75).toLocaleString('pl-PL')} zł
                  </p>
                </div>
                <div className="bg-orange-50 rounded-xl p-3">
                  <p className="text-xs text-orange-700 mb-1">Szac. koszt montażu</p>
                  <p className="text-base font-bold text-orange-700 font-heading">
                    {installCost.min.toLocaleString('pl-PL')}–{installCost.max.toLocaleString('pl-PL')} zł
                  </p>
                </div>
              </div>

              <div className="p-3 bg-blue-50 rounded-xl text-xs text-blue-700">
                💡 Podsumowanie: szukamy klimatyzatora <strong>{category === 'scienne' ? 'split ściennego' : 'multisplit'}</strong> o mocy ok. <strong>{requiredPowerRounded} kW</strong> w cenie do <strong>{(budget * 0.75).toLocaleString('pl-PL')} zł</strong>
              </div>

              <div>
                <label className="text-sm font-semibold text-primary mb-3 block">
                  Preferowana marka (opcjonalnie)
                </label>
                <div className="flex flex-wrap gap-2">
                  {['Bez preferencji', 'Gree', 'Rotenso', 'Daikin', 'Haier', 'LG', 'Samsung', 'Mitsubishi Electric', 'Toshiba', 'Fuji Electric'].map(b => (
                    <button
                      key={b}
                      onClick={() => setPreferredBrand(b === 'Bez preferencji' ? '' : b)}
                      className={`px-3 py-1.5 rounded-xl text-xs font-semibold border-2 transition-all ${
                        (b === 'Bez preferencji' && preferredBrand === '') || preferredBrand === b
                          ? 'border-accent bg-accent text-white'
                          : 'border-border bg-white text-primary hover:border-accent'
                      }`}
                    >
                      {b}
                    </button>
                  ))}
                </div>
              </div>

              <div>
                <label className="text-sm font-semibold text-primary mb-3 block">
                  Klasa energetyczna (opcjonalnie)
                </label>
                <div className="flex flex-wrap gap-2">
                  {['Bez preferencji', 'A+++', 'A++', 'A+'].map(c => (
                    <button
                      key={c}
                      onClick={() => setEnergyClass(c === 'Bez preferencji' ? '' : c)}
                      className={`px-3 py-1.5 rounded-xl text-xs font-semibold border-2 transition-all ${
                        (c === 'Bez preferencji' && energyClass === '') || energyClass === c
                          ? 'border-accent bg-accent text-white'
                          : 'border-border bg-white text-primary hover:border-accent'
                      }`}
                    >
                      {c}
                    </button>
                  ))}
                </div>
              </div>


            </div>
          )}



          {step === 2 && (
            <div className="flex flex-col gap-6">
              <div className="bg-slate-50 rounded-2xl border border-border p-5">
                <h2 className="text-lg font-bold text-primary font-heading mb-4">
                  Dopasowane klimatyzatory
                </h2>
                <div className="grid grid-cols-2 md:grid-cols-3 gap-3">
                  {[
                    { label: 'Wymagana moc', value: `${requiredPowerRounded} kW` },
                    { label: 'Powierzchnia', value: `${totalM2} m²` },
                    { label: 'Typ instalacji', value: category === 'scienne' ? 'Split (1 pokój)' : `Multisplit (${rooms} pokoje)` },
                    { label: 'Szac. montaż', value: `${installCost.min.toLocaleString('pl-PL')}–${installCost.max.toLocaleString('pl-PL')} zł` },
                    ...(energyClass ? [{ label: 'Klasa energetyczna', value: energyClass }] : []),

                  ].map((s, i) => (
                    <div key={i} className="bg-white rounded-xl p-3 border border-border">
                      <p className="text-xs text-text-muted mb-1">{s.label}</p>
                      <p className="text-sm font-bold text-primary font-heading">{s.value}</p>
                    </div>
                  ))}
                </div>
              </div>


              <div className="p-4 bg-amber-50 border border-amber-200 rounded-xl mt-2">
                <p className="text-xs font-bold text-amber-800 mb-1">⚠️ Ceny mają charakter orientacyjny</p>
                <p className="text-xs text-amber-700 mb-3">
                  Podane ceny urządzeń są cenami brutto (23% VAT). Koszt montażu jest szacunkowy. Zachęcamy do darmowej wyceny.
                </p>
                <div className="flex flex-col sm:flex-row gap-2">
                  <a href={`tel:${companyDetails.phoneRaw}`}>
                    <Button variant="primary" size="sm" className="w-full sm:w-auto">
                      <Phone className="size-3.5" /> Bezpłatna wycena
                    </Button>
                  </a>
                  <Link href="/kontakt" className="flex items-center gap-2 px-4 py-2 bg-amber-100 text-amber-800 rounded-xl text-xs font-bold hover:bg-amber-200 transition-colors border border-amber-300">

                      Prześlij zdjęcia
                    
</Link>
                </div>
              </div>
            </div>
          )}
          <div className="flex justify-between mt-8 pt-6 border-t border-border">
            {step > 0 ? (
              <Button 
                onClick={() => setStep(s => s - 1)}
                variant="outline"
                size="md"
              >
                <ArrowLeft className="size-4" /> Wstecz
              </Button>
            ) : <div />}

            {step < STEPS.length - 1 ? (
                <Button 
                  onClick={handleNext}
                  variant="primary"
                  size="md"
                >
                  Dalej <ArrowRight className="size-4" />
                </Button>
            ) : (
              <Link href={getShopUrl()} className={buttonClasses({ variant: "primary", size: "md" })}>

                  Przejdź do sklepu <ArrowRight className="size-4" />
                
</Link>
            )}
          </div>
        </div>
      </div>
    </main>
  );
}