Platzhalterbilder

'use client';

import { useEffect, useRef, useState } from 'react';
import { cn, useTexts } from '@/lib/kit';
import { AppScreen, TourScreen, type TourView } from '@/components/ui/graphics';
import {
  BrandBoard,
  CourseCover,
  PhotoCafe,
  PhotoCoast,
  PhotoDish,
  PhotoDrink,
  PhotoHouse,
  PhotoInterior,
  PhotoOffice,
  PhotoShop,
  PhotoStudio,
  PhotoTreatment,
  PhotoValley,
  PhotoWorkshop,
  StagePhoto,
  type DishKind,
  type DrinkKind,
  type HouseKind,
  type InteriorKind,
  type InteriorView,
  type StudioKind,
} from '@/components/ui/photos';

/*
 * Placeholder images per industry. They look like the photo that will later
 * sit in the slot, so a layout reads right before the real pictures arrive.
 * Drawn in SVG, no image files, no requests. The seed picks a different shot
 * of the same industry. Photo motifs keep their natural colours in both
 * themes, software and agency follow the tokens and the accent.
 */

export type PlaceholderIndustry =
  | 'restaurant'
  | 'cafe'
  | 'bar'
  | 'real-estate'
  | 'hotel'
  | 'fitness'
  | 'yoga'
  | 'salon'
  | 'practice'
  | 'law'
  | 'craft'
  | 'travel'
  | 'software'
  | 'education'
  | 'events'
  | 'shop'
  | 'agency';

export const PLACEHOLDER_INDUSTRIES: PlaceholderIndustry[] = ['restaurant', 'cafe', 'bar', 'real-estate', 'hotel', 'fitness', 'yoga', 'salon', 'practice', 'law', 'craft', 'travel', 'software', 'education', 'events', 'shop', 'agency'];

const TEXTS = {
  en: {
    restaurant: 'A dish on a restaurant table',
    cafe: 'Coffee in a café in morning light',
    bar: 'A drink on the bar',
    'real-estate': 'A house for sale',
    hotel: 'A hotel room with a view',
    fitness: 'A training studio',
    yoga: 'A calm yoga studio',
    salon: 'A salon with a mirror and a chair',
    practice: 'A bright treatment room',
    law: 'An office with books and a desk',
    craft: 'A workshop bench with ceramics',
    travel: 'A landscape for a trip',
    software: 'A software dashboard',
    education: 'A course cover',
    events: 'A conference stage',
    shop: 'A small boutique',
    agency: 'A brand identity board',
    ratio: 'Image size',
  },
  de: {
    restaurant: 'Ein Gericht auf einem Restauranttisch',
    cafe: 'Kaffee in einem Café im Morgenlicht',
    bar: 'Ein Drink an der Bar',
    'real-estate': 'Ein Haus zum Verkauf',
    hotel: 'Ein Hotelzimmer mit Aussicht',
    fitness: 'Ein Trainingsstudio',
    yoga: 'Ein ruhiges Yogastudio',
    salon: 'Ein Salon mit Spiegel und Stuhl',
    practice: 'Ein heller Behandlungsraum',
    law: 'Ein Büro mit Büchern und Schreibtisch',
    craft: 'Eine Werkbank mit Keramik',
    travel: 'Eine Landschaft für eine Reise',
    software: 'Ein Software-Dashboard',
    education: 'Ein Kurscover',
    events: 'Eine Konferenzbühne',
    shop: 'Eine kleine Boutique',
    agency: 'Ein Markenboard',
    ratio: 'Bildgröße',
  },
};

export type PlaceholderLabels = Partial<typeof TEXTS.en>;

export interface PlaceholderProps {
  industry?: PlaceholderIndustry;
  /** Picks another shot of the same industry */
  seed?: number;
  /** CSS aspect ratio, default "4 / 3". Pass "auto" to size it with className. */
  aspect?: string;
  /** Rounded corners and a hairline edge, default true */
  rounded?: boolean;
  /** An optional caption chip in the lower left */
  label?: React.ReactNode;
  /** A small size hint for builders in the upper right, e.g. 1200 × 900 */
  showRatio?: boolean;
  /** Width the size hint is based on, default 1200 */
  ratioWidth?: number;
  /** Zooms the picture a little on hover, default false */
  zoom?: boolean;
  /** Crops into the picture for a detail shot, 1 shows all of it (default), 2 shows a quarter */
  crop?: number;
  /** The point the crop centers on, as CSS position, default "50% 50%" */
  focus?: string;
  /** Alternative text. Defaults to a short description of the industry, pass "" for a decorative image. */
  alt?: string;
  labels?: PlaceholderLabels;
  className?: string;
}

const DISHES: DishKind[] = ['pasta', 'salad', 'fish', 'steak', 'risotto', 'bowl', 'soup', 'dessert'];
const DRINKS: DrinkKind[] = ['cocktail', 'wine', 'spritz', 'beer', 'red', 'lemonade'];
const HOUSES: HouseKind[] = ['villa', 'townhouse', 'cottage', 'apartment', 'loft'];
const ROOMS: [InteriorKind, InteriorView][] = [['suite', 'sea'], ['bedroom', 'mountains'], ['living', 'city'], ['bath', 'garden']];
const STUDIOS: StudioKind[] = ['strength', 'cycle', 'boxing'];
const CALM: StudioKind[] = ['yoga', 'pilates'];
const VIEWS: TourView[] = ['insights', 'board', 'automations', 'inbox'];

/** A product shot for software: the app window floats on a soft accent field */
function SoftwareShot({ seed }: { seed: number }) {
  return (
    <div className="absolute inset-0 bg-[radial-gradient(120%_90%_at_20%_0%,color-mix(in_oklab,var(--primary)_30%,var(--surface-2)),var(--surface)_70%)]">
      <div aria-hidden className="absolute inset-0 bg-[radial-gradient(color-mix(in_oklab,var(--foreground)_10%,transparent)_1px,transparent_1.4px)] [background-size:18px_18px] [mask-image:linear-gradient(to_bottom,#000,transparent_80%)]" />
      <svg viewBox="0 0 800 560" preserveAspectRatio="xMidYMin slice" className="absolute inset-0 size-full">
        <foreignObject x="90" y="56" width="620" height="560">
          <div className="h-full overflow-hidden rounded-xl border border-border bg-background shadow-[var(--shadow-lg)]">
            <div className="flex h-7 items-center gap-1.5 border-b border-border bg-surface px-3">
              {[0, 1, 2].map((i) => (
                <span key={i} className="size-2 rounded-full bg-border-strong" />
              ))}
            </div>
            {seed % 2 === 0 ? <AppScreen className="min-h-[520px]" /> : <TourScreen view={VIEWS[Math.floor(seed / 2) % VIEWS.length]} className="min-h-[520px]" />}
          </div>
        </foreignObject>
      </svg>
    </div>
  );
}

function art(industry: PlaceholderIndustry, seed: number) {
  const s = Math.abs(Math.round(seed));
  switch (industry) {
    case 'restaurant':
      return <PhotoDish dish={DISHES[s % DISHES.length]} table={s} />;
    case 'cafe':
      return s % 2 === 0 ? <PhotoCafe /> : <PhotoDrink kind="coffee" />;
    case 'bar':
      return <PhotoDrink kind={DRINKS[s % DRINKS.length]} />;
    case 'real-estate':
      return <PhotoHouse kind={HOUSES[s % HOUSES.length]} />;
    case 'hotel': {
      const [kind, view] = ROOMS[s % ROOMS.length];
      return <PhotoInterior kind={kind} view={view} />;
    }
    case 'fitness':
      return <PhotoStudio kind={STUDIOS[s % STUDIOS.length]} />;
    case 'yoga':
      return <PhotoStudio kind={CALM[s % CALM.length]} />;
    case 'salon':
      return <PhotoTreatment kind={s % 2 === 0 ? 'salon' : 'spa'} />;
    case 'practice':
      return <PhotoTreatment kind="practice" />;
    case 'law':
      return <PhotoOffice seed={s} />;
    case 'craft':
      return <PhotoWorkshop />;
    case 'travel':
      return s % 2 === 0 ? <PhotoCoast /> : <PhotoValley />;
    case 'software':
      return <SoftwareShot seed={s} />;
    case 'education':
      return <CourseCover seed={s} />;
    case 'events':
      return <StagePhoto seed={s} anchor="xMidYMin" />;
    case 'shop':
      return <PhotoShop seed={s} />;
    case 'agency':
      return <BrandBoard seed={s} />;
  }
}

/** "4 / 3" → [4, 3] */
function ratioOf(aspect: string): [number, number] | null {
  const m = aspect.match(/^\s*([\d.]+)\s*(?:\/\s*([\d.]+))?\s*$/);
  if (!m) return null;
  return [Number(m[1]), Number(m[2] ?? 1)];
}

/**
 * A placeholder picture for an industry.
 *
 *   <Placeholder industry="restaurant" seed={2} aspect="3 / 2" label="Lunch menu" showRatio />
 */
export function Placeholder({ industry = 'restaurant', seed = 0, aspect = '4 / 3', rounded = true, label, showRatio = false, ratioWidth = 1200, zoom = false, crop = 1, focus = '50% 50%', alt, labels, className }: PlaceholderProps) {
  const t = useTexts(TEXTS, labels);
  const text = alt ?? t[industry];
  // with aspect="auto" the size hint follows the rendered box
  const ref = useRef<HTMLDivElement>(null);
  const [box, setBox] = useState<[number, number] | null>(null);
  useEffect(() => {
    const el = ref.current;
    if (!el || !showRatio || aspect !== 'auto' || typeof ResizeObserver === 'undefined') return;
    const ro = new ResizeObserver(() => setBox(el.clientWidth && el.clientHeight ? [el.clientWidth, el.clientHeight] : null));
    ro.observe(el);
    return () => ro.disconnect();
  }, [showRatio, aspect]);
  const r = aspect === 'auto' ? box : ratioOf(aspect);
  const hint = r ? `${Math.round(ratioWidth)} × ${(aspect === 'auto' ? Math.round((ratioWidth * r[1]) / r[0] / 10) * 10 : Math.round((ratioWidth * r[1]) / r[0]))}` : null;
  return (
    <div
      ref={ref}
      role={text ? 'img' : undefined}
      aria-label={text || undefined}
      aria-hidden={text ? undefined : true}
      className={cn('group/ph relative isolate overflow-hidden bg-surface-2', rounded && 'rounded-xl border border-border', className)}
      style={aspect !== 'auto' ? { aspectRatio: aspect } : undefined}
    >
      <div aria-hidden data-clip-ok className={cn('absolute inset-0', zoom && 'transition-transform duration-700 ease-[var(--ease-kit)] group-hover/ph:scale-[1.045] motion-reduce:transition-none')}>
        <div className="absolute inset-0 [&>svg]:absolute [&>svg]:inset-0" style={crop !== 1 ? { transform: `scale(${Math.max(1, crop)})`, transformOrigin: focus } : undefined}>
          {art(industry, seed)}
        </div>
      </div>
      {showRatio && hint && (
        <span title={`${t.ratio} ${hint}`} className="absolute right-2.5 top-2.5 inline-flex items-center gap-1 rounded-md bg-[color-mix(in_oklab,var(--background)_78%,transparent)] px-1.5 py-1 text-[10.5px] font-medium leading-none tabular-nums text-foreground shadow-[var(--shadow-sm)] backdrop-blur">
          <svg viewBox="0 0 12 12" className="size-2.5" fill="none" stroke="currentColor" strokeWidth="1.4" strokeLinecap="round" strokeLinejoin="round" aria-hidden>
            <path d="M1.5 4.5v-3h3M10.5 7.5v3h-3M1.5 1.5l3.5 3.5M10.5 10.5 7 7" />
          </svg>
          {hint}
        </span>
      )}
      {label && (
        <span className="absolute bottom-2.5 left-2.5 max-w-[calc(100%-1.25rem)] truncate rounded-md bg-[color-mix(in_oklab,var(--background)_82%,transparent)] px-2 py-1 text-[11.5px] font-medium leading-tight text-foreground shadow-[var(--shadow-sm)] backdrop-blur">
          {label}
        </span>
      )}
    </div>
  );
}