import type { ArtMovement } from '../types';
import type { SurfaceTextureKind } from '../utils/galleryProceduralTextures';

export type GalleryWindowStyle =
  | 'roman-arch'
  | 'gothic-lancet'
  | 'baroque-pair'
  | 'sash'
  | 'factory'
  | 'skylight'
  | 'art-nouveau'
  | 'glass-block'
  | 'clerestory'
  | 'round-oculus';

export interface GalleryWindowSpec {
  wall: 'back' | 'left' | 'right' | 'ceiling';
  /** Offset along wall axis from center (meters). */
  x: number;
  /** Vertical center height (meters). */
  y: number;
  width: number;
  height: number;
  style: GalleryWindowStyle;
  lightColor: string;
  lightIntensity: number;
}

export interface MovementInteriorStyle {
  id: string;
  label: string;
  subtitle: string;
  surfaces: {
    wall: SurfaceTextureKind;
    wallSide?: SurfaceTextureKind;
    ceiling: SurfaceTextureKind;
    floor: SurfaceTextureKind;
  };
  tints: {
    wall: string;
    wallSide?: string;
    ceiling: string;
    floor: string;
    trim: string;
  };
  titleColor: string;
  ambient: number;
  warmLight: string;
  sunLight: string;
  fog: string;
  background: string;
  doorWood: [string, string, string];
  windows: GalleryWindowSpec[];
  trackLights: number;
  /** Scales the shared hall/scene lights. <1 for deliberately dim period interiors. */
  lightScale: number;
  /**
   * Which period architecture the hall is built from. Every movement has its
   * own — the interiors are not shared between movements — and each kind maps
   * to one component under `components/hall-details/`.
   */
  details: MovementDetailKind;
}

export type MovementDetailKind =
  | 'roman'
  | 'byzantine'
  | 'gothic'
  | 'quattrocento'
  | 'cinquecento'
  | 'flemish'
  | 'mannerist'
  | 'baroque'
  | 'rococo'
  | 'neoclassical'
  | 'gothic-revival'
  | 'bourgeois'
  | 'north-light'
  | 'paris-atelier'
  | 'symbolist'
  | 'art-nouveau'
  | 'fauvist'
  | 'expressionist'
  | 'cubist-atelier'
  | 'futurist'
  | 'suprematist'
  | 'constructivist'
  | 'dada'
  | 'surrealist'
  | 'loft'
  | 'white-cube';

function windows(...specs: GalleryWindowSpec[]): GalleryWindowSpec[] {
  return specs;
}

function mk(
  id: string,
  label: string,
  subtitle: string,
  surfaces: MovementInteriorStyle['surfaces'],
  tints: MovementInteriorStyle['tints'],
  opts: Partial<Omit<MovementInteriorStyle, 'id' | 'label' | 'subtitle' | 'surfaces' | 'tints'>> & {
    details: MovementInteriorStyle['details'];
    windows: GalleryWindowSpec[];
  }
): MovementInteriorStyle {
  return {
    id,
    label,
    subtitle,
    surfaces,
    tints,
    titleColor: opts.titleColor ?? '#4a3020',
    ambient: opts.ambient ?? 0.55,
    warmLight: opts.warmLight ?? '#fff4e8',
    sunLight: opts.sunLight ?? '#fffaf0',
    fog: opts.fog ?? '#1a1814',
    background: opts.background ?? '#121010',
    doorWood: opts.doorWood ?? ['#3d2818', '#4e3624', '#261a10'],
    windows: opts.windows,
    trackLights: opts.trackLights ?? 0.8,
    lightScale: opts.lightScale ?? 1,
    details: opts.details,
  };
}

/** Unique photo-real interior per movement (keyed by database id). */
const BY_MOVEMENT_ID: Record<number, MovementInteriorStyle> = {
  27: mk(
    'ancient-classical',
    'Roman atrium',
    'Marble-clad villa · mosaic floor · clerestory daylight',
    { wall: 'limestone', ceiling: 'plaster-warm', floor: 'mosaic-roman' },
    { wall: '#8e8980', ceiling: '#9c9994', floor: '#c8b898', trim: '#a89878' },
    {
      details: 'roman',
      // Lit like the basilica: shared lights held back so the walls read as
      // surfaces rather than blowing out. Window shafts are not scaled.
      lightScale: 0.3,
      titleColor: '#5a4830',
      ambient: 0.62,
      warmLight: '#fff8e8',
      windows: windows(
        { wall: 'back', x: -2.5, y: 3.2, width: 1.4, height: 1.8, style: 'roman-arch', lightColor: '#fff8e0', lightIntensity: 3.2 },
        { wall: 'back', x: 2.5, y: 3.2, width: 1.4, height: 1.8, style: 'roman-arch', lightColor: '#fff8e0', lightIntensity: 3.2 },
        { wall: 'left', x: 0, y: 3.0, width: 2.0, height: 1.6, style: 'clerestory', lightColor: '#fffaf0', lightIntensity: 2.8 },
        { wall: 'right', x: 0, y: 3.0, width: 2.0, height: 1.6, style: 'clerestory', lightColor: '#fffaf0', lightIntensity: 2.8 }
      ),
      trackLights: 0.4,
      doorWood: ['#6a5840', '#7a6848', '#5a4830'],
    }
  ),
  28: mk(
    'byzantine-sanctuary',
    'Byzantine basilica',
    'Marble revetment · coffered timber ceiling · Cosmatesque stone floor',
    { wall: 'marble-revetment', ceiling: 'coffered-wood', floor: 'marble-opus-sectile' },
    { wall: '#a89880', ceiling: '#6a4526', floor: '#a09079', trim: '#8a6440' },
    {
      details: 'byzantine',
      titleColor: '#e8d8b0',
      ambient: 0.44,
      warmLight: '#ffdca8',
      sunLight: '#ffdca0',
      fog: '#100b07',
      background: '#0a0705',
      windows: windows(
        { wall: 'back', x: 0, y: 3.1, width: 0.9, height: 1.9, style: 'roman-arch', lightColor: '#ffd28a', lightIntensity: 3.4 },
        { wall: 'left', x: -3.5, y: 3.2, width: 0.7, height: 1.6, style: 'roman-arch', lightColor: '#ffd28a', lightIntensity: 3.0 },
        { wall: 'left', x: 3.5, y: 3.2, width: 0.7, height: 1.6, style: 'roman-arch', lightColor: '#ffd28a', lightIntensity: 3.0 },
        { wall: 'right', x: -3.5, y: 3.2, width: 0.7, height: 1.6, style: 'roman-arch', lightColor: '#ffd28a', lightIntensity: 3.0 },
        { wall: 'right', x: 3.5, y: 3.2, width: 0.7, height: 1.6, style: 'roman-arch', lightColor: '#ffd28a', lightIntensity: 3.0 }
      ),
      trackLights: 0.35,
      // Basilica interiors are lit by shafts from high windows, not evenly flooded.
      lightScale: 0.3,
      doorWood: ['#3a2416', '#4c3220', '#241608'],
    }
  ),
  29: mk(
    'gothic-cathedral',
    'Gothic nave',
    'Blind-arcaded ashlar · ribbed stone vault · worn flagstones',
    { wall: 'gothic-ashlar', ceiling: 'gothic-vault', floor: 'gothic-stone-floor' },
    { wall: '#8d8471', ceiling: '#6d6555', floor: '#6f6759', trim: '#7d7159' },
    {
      details: 'gothic',
      titleColor: '#efe4cc',
      ambient: 0.6,
      warmLight: '#ffe6bc',
      sunLight: '#dbe8ff',
      // Cool shadowed stone, but never a pure void — walls must stay readable.
      fog: '#1b1a18',
      background: '#131211',
      windows: windows(
        { wall: 'back', x: -2, y: 2.8, width: 0.8, height: 2.8, style: 'gothic-lancet', lightColor: '#c8e0ff', lightIntensity: 3.8 },
        { wall: 'back', x: 2, y: 2.8, width: 0.8, height: 2.8, style: 'gothic-lancet', lightColor: '#c8e0ff', lightIntensity: 3.8 },
        { wall: 'left', x: -4.5, y: 3.0, width: 0.9, height: 2.6, style: 'gothic-lancet', lightColor: '#c8e0ff', lightIntensity: 3.2 },
        { wall: 'left', x: 4.5, y: 3.0, width: 0.9, height: 2.6, style: 'gothic-lancet', lightColor: '#c8e0ff', lightIntensity: 3.2 },
        { wall: 'right', x: -4.5, y: 3.0, width: 0.9, height: 2.6, style: 'gothic-lancet', lightColor: '#c8e0ff', lightIntensity: 3.2 },
        { wall: 'right', x: 4.5, y: 3.0, width: 0.9, height: 2.6, style: 'gothic-lancet', lightColor: '#c8e0ff', lightIntensity: 3.2 }
      ),
      trackLights: 0.5,
      // Naves are lit by window shafts against shadowed stone, not flooded.
      lightScale: 0.26,
    }
  ),
  30: mk(
    'early-renaissance-palazzo',
    'Florentine palazzo',
    'Lime-washed walls · terracotta accents · arched windows',
    { wall: 'painted-lime', wallSide: 'stucco-cream', ceiling: 'fresco-worn', floor: 'terracotta-tiles' },
    { wall: '#89847e', ceiling: '#96948f', floor: '#c89070', trim: '#c9a227' },
    {
      details: 'quattrocento',
      // Lit like the basilica: shared lights held back so the walls read as
      // surfaces rather than blowing out. Window shafts are not scaled.
      lightScale: 0.3,
      titleColor: '#6b4423',
      windows: windows(
        { wall: 'back', x: -2.2, y: 2.6, width: 1.3, height: 1.7, style: 'roman-arch', lightColor: '#fff4e0', lightIntensity: 3.0 },
        { wall: 'back', x: 2.2, y: 2.6, width: 1.3, height: 1.7, style: 'roman-arch', lightColor: '#fff4e0', lightIntensity: 3.0 },
        { wall: 'left', x: 0, y: 2.8, width: 2.2, height: 1.4, style: 'clerestory', lightColor: '#fffaf0', lightIntensity: 2.6 }
      ),
    }
  ),
  31: mk(
    'high-renaissance-palazzo',
    'Roman palazzo',
    'Marble and stucco · coffered ceiling · checker floor',
    { wall: 'marble-veined-carrara', wallSide: 'stucco-cream', ceiling: 'plaster-warm', floor: 'marble-checker' },
    { wall: '#918f8a', wallSide: '#8f8980', ceiling: '#9c9994', floor: '#ddd8cc', trim: '#c9a227' },
    {
      details: 'cinquecento',
      // Lit like the basilica: shared lights held back so the walls read as
      // surfaces rather than blowing out. Window shafts are not scaled.
      lightScale: 0.3,
      titleColor: '#6b4423',
      windows: windows(
        { wall: 'back', x: 0, y: 2.8, width: 2.8, height: 1.8, style: 'baroque-pair', lightColor: '#fff8f0', lightIntensity: 3.8 },
        { wall: 'left', x: 0, y: 3.0, width: 2.0, height: 1.5, style: 'clerestory', lightColor: '#fffaf0', lightIntensity: 2.8 },
        { wall: 'right', x: 0, y: 3.0, width: 2.0, height: 1.5, style: 'clerestory', lightColor: '#fffaf0', lightIntensity: 2.8 },
        { wall: 'ceiling', x: 0, y: 0, width: 3.0, height: 2.0, style: 'round-oculus', lightColor: '#ffffff', lightIntensity: 4.0 }
      ),
    }
  ),
  32: mk(
    'northern-renaissance-hall',
    'Flemish panel hall',
    'Oak wainscoting · leaded glass · herringbone floor',
    { wall: 'oak-panel', wallSide: 'plaster-warm', ceiling: 'dark-wood-panel', floor: 'parquet-herringbone' },
    { wall: '#8a6848', wallSide: '#8c8985', ceiling: '#3a2818', floor: '#8a6848', trim: '#5c4030' },
    {
      details: 'flemish',
      // Lit like the basilica: shared lights held back so the walls read as
      // surfaces rather than blowing out. Window shafts are not scaled.
      lightScale: 0.3,
      titleColor: '#f0e8d8',
      warmLight: '#ffe8c8',
      windows: windows(
        { wall: 'back', x: -2, y: 2.5, width: 1.2, height: 1.5, style: 'sash', lightColor: '#e8f0ff', lightIntensity: 2.8 },
        { wall: 'back', x: 2, y: 2.5, width: 1.2, height: 1.5, style: 'sash', lightColor: '#e8f0ff', lightIntensity: 2.8 },
        { wall: 'left', x: 0, y: 2.6, width: 1.8, height: 1.4, style: 'sash', lightColor: '#e8f0ff', lightIntensity: 2.4 }
      ),
      doorWood: ['#4a3020', '#5c3a28', '#3a2010'],
    }
  ),
  33: mk(
    'mannerist-villa',
    'Mannerist gallery',
    'Dramatic stucco · elongated windows · veined marble',
    { wall: 'stucco-terracotta', ceiling: 'gilded-stucco', floor: 'marble-veined-emerald' },
    { wall: '#98816b', ceiling: '#a79456', floor: '#dce8e0', trim: '#b8860b' },
    {
      details: 'mannerist',
      // Lit like the basilica: shared lights held back so the walls read as
      // surfaces rather than blowing out. Window shafts are not scaled.
      lightScale: 0.3,
      titleColor: '#4a2818',
      windows: windows(
        { wall: 'back', x: -1.8, y: 2.7, width: 1.0, height: 2.2, style: 'roman-arch', lightColor: '#fff0d8', lightIntensity: 2.8 },
        { wall: 'back', x: 1.8, y: 2.7, width: 1.0, height: 2.2, style: 'roman-arch', lightColor: '#fff0d8', lightIntensity: 2.8 },
        { wall: 'right', x: 0, y: 3.0, width: 1.6, height: 1.2, style: 'clerestory', lightColor: '#fffaf0', lightIntensity: 2.2 }
      ),
    }
  ),
  34: mk(
    'baroque-palace',
    'Baroque state gallery',
    'Crimson velvet · gilded stucco · grand windows',
    { wall: 'velvet-crimson', ceiling: 'gilded-stucco', floor: 'marble-veined-carrara' },
    { wall: '#5c1828', ceiling: '#d8c070', floor: '#ece8e0', trim: '#d4af37' },
    {
      details: 'baroque',
      titleColor: '#f0d890',
      ambient: 0.58,
      warmLight: '#ffd898',
      fog: '#100808',
      windows: windows(
        { wall: 'back', x: 0, y: 2.6, width: 3.2, height: 2.2, style: 'baroque-pair', lightColor: '#fff8e8', lightIntensity: 4.5 },
        { wall: 'left', x: 0, y: 2.8, width: 1.8, height: 1.8, style: 'baroque-pair', lightColor: '#fff8e8', lightIntensity: 3.2 },
        { wall: 'right', x: 0, y: 2.8, width: 1.8, height: 1.8, style: 'baroque-pair', lightColor: '#fff8e8', lightIntensity: 3.2 },
        { wall: 'ceiling', x: 0, y: 0, width: 2.5, height: 1.8, style: 'skylight', lightColor: '#ffffff', lightIntensity: 3.5 }
      ),
      trackLights: 0.6,
      doorWood: ['#1a1008', '#2a1810', '#120c06'],
    }
  ),
  35: mk(
    'rococo-salon',
    'Rococo salon',
    'Pastel painted walls · gilt trim · chevron parquet',
    { wall: 'painted-oil-satin', ceiling: 'silk-pale', floor: 'parquet-chevrons' },
    { wall: '#918a91', ceiling: '#9b9995', floor: '#c8a882', trim: '#d4af37' },
    {
      details: 'rococo',
      // Lit like the basilica: shared lights held back so the walls read as
      // surfaces rather than blowing out. Window shafts are not scaled.
      lightScale: 0.3,
      titleColor: '#6a4858',
      warmLight: '#fff0f0',
      windows: windows(
        { wall: 'back', x: -2, y: 2.5, width: 1.4, height: 1.8, style: 'baroque-pair', lightColor: '#fff8ff', lightIntensity: 3.4 },
        { wall: 'back', x: 2, y: 2.5, width: 1.4, height: 1.8, style: 'baroque-pair', lightColor: '#fff8ff', lightIntensity: 3.4 },
        { wall: 'ceiling', x: 0, y: 0, width: 2.0, height: 1.5, style: 'skylight', lightColor: '#ffffff', lightIntensity: 3.0 }
      ),
    }
  ),
  36: mk(
    'neoclassical-museum',
    'Neoclassical museum',
    'White painted walls · coffered ceiling · skylit salon',
    { wall: 'painted-flat', ceiling: 'plaster-white', floor: 'marble-veined-carrara' },
    { wall: '#908f8d', ceiling: '#9e9e9e', floor: '#eceae6', trim: '#b8b0a4' },
    {
      details: 'neoclassical',
      // Lit like the basilica: shared lights held back so the walls read as
      // surfaces rather than blowing out. Window shafts are not scaled.
      lightScale: 0.3,
      titleColor: '#4a4844',
      ambient: 0.65,
      windows: windows(
        { wall: 'back', x: 0, y: 2.6, width: 2.8, height: 2.0, style: 'baroque-pair', lightColor: '#ffffff', lightIntensity: 4.0 },
        { wall: 'ceiling', x: 0, y: 0, width: 4.0, height: 2.5, style: 'skylight', lightColor: '#ffffff', lightIntensity: 5.0 },
        { wall: 'left', x: 0, y: 3.0, width: 2.0, height: 1.2, style: 'clerestory', lightColor: '#fffaf0', lightIntensity: 2.5 }
      ),
      trackLights: 0.7,
    }
  ),
  37: mk(
    'romantic-gothic-revival',
    'Romantic gallery',
    'Dark walnut paneling · pointed windows · Persian carpet tones',
    { wall: 'walnut-panel', ceiling: 'dark-plaster', floor: 'parquet-herringbone' },
    { wall: '#5a4030', ceiling: '#2a2420', floor: '#6a5040', trim: '#8a7050' },
    {
      details: 'gothic-revival',
      titleColor: '#e8dcc8',
      ambient: 0.5,
      warmLight: '#ffe0c0',
      windows: windows(
        { wall: 'back', x: -1.5, y: 2.6, width: 0.9, height: 2.2, style: 'gothic-lancet', lightColor: '#c8d8ff', lightIntensity: 2.6 },
        { wall: 'back', x: 1.5, y: 2.6, width: 0.9, height: 2.2, style: 'gothic-lancet', lightColor: '#c8d8ff', lightIntensity: 2.6 },
        { wall: 'right', x: 0, y: 2.5, width: 1.4, height: 1.6, style: 'sash', lightColor: '#e8f0ff', lightIntensity: 2.2 }
      ),
    }
  ),
  38: mk(
    'realist-bourgeois',
    'Realist picture gallery',
    'Warm painted walls · bourgeois salon · oak parquet',
    { wall: 'painted-emulsion', ceiling: 'painted-emulsion', floor: 'parquet-herringbone' },
    { wall: '#88847e', ceiling: '#97948f', floor: '#a08060', trim: '#8a7050' },
    {
      details: 'bourgeois',
      // Lit like the basilica: shared lights held back so the walls read as
      // surfaces rather than blowing out. Window shafts are not scaled.
      lightScale: 0.3,
      windows: windows(
        { wall: 'back', x: 0, y: 2.5, width: 2.4, height: 1.6, style: 'sash', lightColor: '#f0f4ff', lightIntensity: 3.2 },
        { wall: 'left', x: 0, y: 2.7, width: 1.6, height: 1.3, style: 'sash', lightColor: '#f0f4ff', lightIntensity: 2.4 }
      ),
    }
  ),
  39: mk(
    'impressionist-salon',
    'Impressionist salon',
    'North-light skylight · pale painted walls · herringbone floor',
    { wall: 'painted-emulsion', ceiling: 'painted-flat', floor: 'parquet-herringbone' },
    { wall: '#8f8c87', ceiling: '#9e9e9e', floor: '#c8a882', trim: '#c9a96e' },
    {
      details: 'north-light',
      // Lit like the basilica: shared lights held back so the walls read as
      // surfaces rather than blowing out. Window shafts are not scaled.
      lightScale: 0.3,
      ambient: 0.68,
      windows: windows(
        { wall: 'ceiling', x: 0, y: 0, width: 5.0, height: 3.0, style: 'skylight', lightColor: '#ffffff', lightIntensity: 6.0 },
        { wall: 'back', x: -2, y: 2.6, width: 1.2, height: 1.4, style: 'sash', lightColor: '#f0f8ff', lightIntensity: 2.5 },
        { wall: 'back', x: 2, y: 2.6, width: 1.2, height: 1.4, style: 'sash', lightColor: '#f0f8ff', lightIntensity: 2.5 }
      ),
      trackLights: 0.5,
    }
  ),
  40: mk(
    'post-impressionist-atelier',
    'Montmartre atelier',
    'Painted studio walls · large north window · worn floorboards',
    { wall: 'painted-emulsion', ceiling: 'painted-emulsion', floor: 'parquet-herringbone' },
    { wall: '#847f76', ceiling: '#918f88', floor: '#9a7858', trim: '#8a6848' },
    {
      details: 'paris-atelier',
      // Lit like the basilica: shared lights held back so the walls read as
      // surfaces rather than blowing out. Window shafts are not scaled.
      lightScale: 0.3,
      windows: windows(
        { wall: 'left', x: 0, y: 2.4, width: 2.8, height: 2.0, style: 'factory', lightColor: '#f0f8ff', lightIntensity: 4.5 },
        { wall: 'back', x: 0, y: 2.8, width: 1.0, height: 1.2, style: 'sash', lightColor: '#f0f4ff', lightIntensity: 2.0 }
      ),
    }
  ),
  41: mk(
    'symbolist-chamber',
    'Symbolist chamber',
    'Deep green painted walls · amber window glow · dark parquet',
    { wall: 'painted-oil-matte', ceiling: 'dark-plaster', floor: 'parquet-herringbone' },
    { wall: '#1a4030', ceiling: '#1a1814', floor: '#4a3828', trim: '#8a7050' },
    {
      details: 'symbolist',
      titleColor: '#d8e8c8',
      ambient: 0.55,
      warmLight: '#ffd898',
      windows: windows(
        { wall: 'back', x: 0, y: 2.4, width: 1.0, height: 1.8, style: 'sash', lightColor: '#ffb860', lightIntensity: 2.0 },
        { wall: 'right', x: 0, y: 2.6, width: 0.8, height: 1.4, style: 'gothic-lancet', lightColor: '#ffd080', lightIntensity: 1.6 }
      ),
      trackLights: 0.9,
    }
  ),
  42: mk(
    'art-nouveau-salon',
    'Art Nouveau salon',
    'Painted plaster · stained glass · terrazzo floor',
    { wall: 'painted-oil-satin', ceiling: 'silk-gold', floor: 'terrazzo' },
    { wall: '#8f8c87', ceiling: '#a0946b', floor: '#d8d0c4', trim: '#6a9868' },
    {
      details: 'art-nouveau',
      // Lit like the basilica: shared lights held back so the walls read as
      // surfaces rather than blowing out. Window shafts are not scaled.
      lightScale: 0.3,
      titleColor: '#3a5840',
      windows: windows(
        { wall: 'back', x: 0, y: 2.5, width: 2.2, height: 2.0, style: 'art-nouveau', lightColor: '#e8ffe8', lightIntensity: 3.2 },
        { wall: 'left', x: 0, y: 2.6, width: 1.4, height: 1.8, style: 'art-nouveau', lightColor: '#ffe8f0', lightIntensity: 2.4 },
        { wall: 'ceiling', x: 0, y: 0, width: 2.0, height: 1.2, style: 'skylight', lightColor: '#ffffff', lightIntensity: 2.8 }
      ),
    }
  ),
  43: mk(
    'fauvist-studio',
    'Fauvist studio',
    'Bold painted walls · flooded with color and light',
    { wall: 'painted-oil-matte', wallSide: 'painted-oil-matte', ceiling: 'painted-emulsion', floor: 'parquet-herringbone' },
    { wall: '#e89060', wallSide: '#e8c860', ceiling: '#9e998e', floor: '#a07048', trim: '#c04020' },
    {
      details: 'fauvist',
      // Lit like the basilica: shared lights held back so the walls read as
      // surfaces rather than blowing out. Window shafts are not scaled.
      lightScale: 0.3,
      titleColor: '#402010',
      ambient: 0.7,
      windows: windows(
        { wall: 'left', x: 0, y: 2.5, width: 3.0, height: 2.2, style: 'factory', lightColor: '#fff8f0', lightIntensity: 5.0 },
        { wall: 'back', x: 0, y: 2.8, width: 1.6, height: 1.2, style: 'sash', lightColor: '#fff0e0', lightIntensity: 2.5 }
      ),
    }
  ),
  44: mk(
    'expressionist-room',
    'Expressionist room',
    'Angular wood panels · dramatic raking light',
    { wall: 'dark-wood-panel', ceiling: 'dark-plaster', floor: 'parquet-herringbone' },
    { wall: '#3a2818', ceiling: '#2a2018', floor: '#5a4030', trim: '#8a6040' },
    {
      details: 'expressionist',
      titleColor: '#f0d8b0',
      ambient: 0.52,
      windows: windows(
        { wall: 'back', x: -1.5, y: 2.6, width: 1.0, height: 1.6, style: 'sash', lightColor: '#ffe8c0', lightIntensity: 2.8 },
        { wall: 'right', x: 0, y: 2.4, width: 2.0, height: 1.8, style: 'factory', lightColor: '#fff0d8', lightIntensity: 3.5 }
      ),
    }
  ),
  45: mk(
    'cubist-studio',
    'Cubist studio',
    'Paris atelier · factory windows · painted plaster',
    { wall: 'painted-emulsion', ceiling: 'painted-flat', floor: 'parquet-herringbone' },
    { wall: '#8c8a85', ceiling: '#999999', floor: '#9a8870', trim: '#888888' },
    {
      details: 'cubist-atelier',
      // Lit like the basilica: shared lights held back so the walls read as
      // surfaces rather than blowing out. Window shafts are not scaled.
      lightScale: 0.3,
      ambient: 0.65,
      windows: windows(
        { wall: 'left', x: 0, y: 2.5, width: 3.5, height: 2.4, style: 'factory', lightColor: '#f0f8ff', lightIntensity: 5.5 },
        { wall: 'back', x: 0, y: 3.0, width: 1.8, height: 1.0, style: 'clerestory', lightColor: '#ffffff', lightIntensity: 2.5 }
      ),
    }
  ),
  46: mk(
    'futurist-loft',
    'Futurist loft',
    'Steel and glass · industrial concrete · sweeping daylight',
    { wall: 'concrete-raw', ceiling: 'concrete-raw', floor: 'industrial-floor' },
    { wall: '#858585', ceiling: '#7a7a7a', floor: '#888880', trim: '#606060' },
    {
      details: 'futurist',
      // Lit like the basilica: shared lights held back so the walls read as
      // surfaces rather than blowing out. Window shafts are not scaled.
      lightScale: 0.3,
      titleColor: '#303030',
      ambient: 0.62,
      fog: '#181818',
      windows: windows(
        { wall: 'back', x: 0, y: 2.6, width: 4.0, height: 2.4, style: 'factory', lightColor: '#ffffff', lightIntensity: 6.0 },
        { wall: 'left', x: 0, y: 2.8, width: 2.5, height: 1.6, style: 'factory', lightColor: '#f0f8ff', lightIntensity: 3.5 },
        { wall: 'ceiling', x: 0, y: 0, width: 3.0, height: 2.0, style: 'skylight', lightColor: '#ffffff', lightIntensity: 4.0 }
      ),
      doorWood: ['#606060', '#707070', '#505050'],
    }
  ),
  47: mk(
    'suprematist-gallery',
    'Suprematist white cube',
    'Matte white paint · geometric light · polished floor',
    { wall: 'painted-flat', ceiling: 'painted-flat', floor: 'concrete-polished' },
    { wall: '#a8a8a8', ceiling: '#b3b3b3', floor: '#e0e0e0', trim: '#cccccc' },
    {
      details: 'suprematist',
      // Lit like the basilica: shared lights held back so the walls read as
      // surfaces rather than blowing out. Window shafts are not scaled.
      lightScale: 0.3,
      titleColor: '#222222',
      ambient: 0.72,
      fog: '#1a1a1a',
      background: '#111111',
      windows: windows(
        { wall: 'ceiling', x: 0, y: 0, width: 4.5, height: 3.0, style: 'skylight', lightColor: '#ffffff', lightIntensity: 6.5 },
        { wall: 'back', x: 0, y: 2.8, width: 2.0, height: 1.2, style: 'clerestory', lightColor: '#ffffff', lightIntensity: 3.0 }
      ),
      trackLights: 0.4,
      doorWood: ['#aaaaaa', '#bbbbbb', '#999999'],
    }
  ),
  48: mk(
    'constructivist-space',
    'Constructivist space',
    'Glass block · concrete · angular daylight',
    { wall: 'concrete-block', ceiling: 'concrete-raw', floor: 'concrete-polished' },
    { wall: '#858585', ceiling: '#7a7a7a', floor: '#c0c0c0', trim: '#808080' },
    {
      details: 'constructivist',
      // Lit like the basilica: shared lights held back so the walls read as
      // surfaces rather than blowing out. Window shafts are not scaled.
      lightScale: 0.3,
      titleColor: '#303030',
      ambient: 0.65,
      windows: windows(
        { wall: 'back', x: 0, y: 2.5, width: 2.8, height: 2.0, style: 'glass-block', lightColor: '#f0f8ff', lightIntensity: 4.0 },
        { wall: 'left', x: 0, y: 2.6, width: 2.0, height: 1.8, style: 'glass-block', lightColor: '#f0f8ff', lightIntensity: 3.2 },
        { wall: 'ceiling', x: 0, y: 0, width: 2.5, height: 1.5, style: 'skylight', lightColor: '#ffffff', lightIntensity: 3.5 }
      ),
      doorWood: ['#707070', '#808080', '#606060'],
    }
  ),
  49: mk(
    'dada-salon',
    'Dada salon',
    'Eclectic bourgeois room · painted walls and exposed brick',
    { wall: 'painted-emulsion', wallSide: 'brick', ceiling: 'painted-emulsion', floor: 'parquet-herringbone' },
    { wall: '#8b8478', wallSide: '#8a5040', ceiling: '#97948d', floor: '#8a6848', trim: '#6a4830' },
    {
      details: 'dada',
      // Lit like the basilica: shared lights held back so the walls read as
      // surfaces rather than blowing out. Window shafts are not scaled.
      lightScale: 0.3,
      windows: windows(
        { wall: 'back', x: -1.5, y: 2.5, width: 1.0, height: 1.4, style: 'sash', lightColor: '#f0f4ff', lightIntensity: 2.5 },
        { wall: 'back', x: 1.5, y: 2.6, width: 0.8, height: 1.8, style: 'gothic-lancet', lightColor: '#ffe8c0', lightIntensity: 2.0 },
        { wall: 'right', x: 0, y: 2.4, width: 1.6, height: 1.6, style: 'factory', lightColor: '#ffffff', lightIntensity: 3.0 }
      ),
      trackLights: 1.0,
    }
  ),
  50: mk(
    'surrealist-interior',
    'Surrealist interior',
    'Dark painted walls · uncanny warm light',
    { wall: 'painted-oil-matte', ceiling: 'dark-plaster', floor: 'parquet-herringbone' },
    { wall: '#1a2848', ceiling: '#2a2428', floor: '#5a4838', trim: '#8a7050' },
    {
      details: 'surrealist',
      titleColor: '#e8dcc8',
      ambient: 0.58,
      warmLight: '#ffd898',
      windows: windows(
        { wall: 'back', x: 0, y: 2.5, width: 1.4, height: 1.6, style: 'sash', lightColor: '#ffe8c8', lightIntensity: 2.8 },
        { wall: 'left', x: 0, y: 2.7, width: 1.0, height: 1.2, style: 'sash', lightColor: '#c8e0ff', lightIntensity: 2.0 },
        { wall: 'ceiling', x: 0, y: 0, width: 1.5, height: 1.0, style: 'skylight', lightColor: '#ffffff', lightIntensity: 2.5 }
      ),
      trackLights: 0.85,
    }
  ),
  51: mk(
    'abstract-expressionist-loft',
    'NYC loft',
    'Raw brick and painted plaster · north-light factory windows',
    { wall: 'brick', wallSide: 'painted-flat', ceiling: 'concrete-raw', floor: 'industrial-floor' },
    { wall: '#8a5040', wallSide: '#858585', ceiling: '#989898', floor: '#888880', trim: '#606060' },
    {
      details: 'loft',
      // Lit like the basilica: shared lights held back so the walls read as
      // surfaces rather than blowing out. Window shafts are not scaled.
      lightScale: 0.3,
      titleColor: '#303030',
      ambient: 0.65,
      windows: windows(
        { wall: 'left', x: 0, y: 2.5, width: 4.0, height: 2.6, style: 'factory', lightColor: '#f0f8ff', lightIntensity: 6.5 },
        { wall: 'ceiling', x: 0, y: 0, width: 3.5, height: 2.0, style: 'skylight', lightColor: '#ffffff', lightIntensity: 4.5 }
      ),
    }
  ),
  52: mk(
    'pop-art-gallery',
    'Pop Art gallery',
    'White painted walls · fluorescent daylight · polished concrete',
    { wall: 'painted-flat', ceiling: 'painted-flat', floor: 'concrete-polished' },
    { wall: '#a8a8a8', ceiling: '#b3b3b3', floor: '#d8d8d8', trim: '#cccccc' },
    {
      details: 'white-cube',
      // Lit like the basilica: shared lights held back so the walls read as
      // surfaces rather than blowing out. Window shafts are not scaled.
      lightScale: 0.3,
      titleColor: '#222222',
      ambient: 0.75,
      warmLight: '#ffffff',
      fog: '#1a1a1a',
      background: '#101010',
      windows: windows(
        { wall: 'back', x: 0, y: 2.6, width: 3.0, height: 2.0, style: 'factory', lightColor: '#ffffff', lightIntensity: 5.5 },
        { wall: 'ceiling', x: 0, y: 0, width: 5.0, height: 3.0, style: 'skylight', lightColor: '#ffffff', lightIntensity: 6.0 }
      ),
      trackLights: 0.6,
      doorWood: ['#888888', '#999999', '#777777'],
    }
  ),
};

function blendAccent(style: MovementInteriorStyle, accentHex?: string): MovementInteriorStyle {
  if (!accentHex) return style;
  const w = 0.08;
  const mix = (a: string, b: string) => {
    const pa = parseInt(a.replace('#', ''), 16);
    const pb = parseInt(b.replace('#', ''), 16);
    const r = Math.round(((pa >> 16) & 255) * w + ((pb >> 16) & 255) * (1 - w));
    const g = Math.round(((pa >> 8) & 255) * w + ((pb >> 8) & 255) * (1 - w));
    const bl = Math.round((pa & 255) * w + (pb & 255) * (1 - w));
    return `#${((r << 16) | (g << 8) | bl).toString(16).padStart(6, '0')}`;
  };
  return {
    ...style,
    tints: {
      ...style.tints,
      wall: mix(accentHex, style.tints.wall),
      wallSide: style.tints.wallSide ? mix(accentHex, style.tints.wallSide) : undefined,
      trim: mix(accentHex, style.tints.trim),
    },
  };
}

/**
 * Styles were authored with legacy ids 27–52; gallery_dev uses 1–26.
 * Northern (5) / High Renaissance (6) are swapped vs the legacy sequence.
 */
const DB_ID_TO_STYLE_KEY: Record<number, number> = {
  1: 27,
  2: 28,
  3: 29,
  4: 30,
  5: 32,
  6: 31,
  7: 33,
  8: 34,
  9: 35,
  10: 36,
  11: 37,
  12: 38,
  13: 39,
  14: 40,
  15: 41,
  16: 42,
  17: 43,
  18: 44,
  19: 45,
  20: 46,
  21: 47,
  22: 48,
  23: 49,
  24: 50,
  25: 51,
  26: 52,
};

/** Fallback name-based resolver for movements not in the catalog. */
function fallbackByName(movement: ArtMovement & { era_name?: string }): MovementInteriorStyle {
  const n = movement.name.toLowerCase();
  const era = (movement.era_name ?? '').toLowerCase();
  if (n.includes('byzantine')) return BY_MOVEMENT_ID[28];
  if (n.includes('gothic')) return BY_MOVEMENT_ID[29];
  if (n.includes('renaissance')) return BY_MOVEMENT_ID[31];
  if (n.includes('baroque') || n.includes('rococo')) return BY_MOVEMENT_ID[34];
  if (era.includes('medieval')) return BY_MOVEMENT_ID[29];
  if (n.includes('impression')) return BY_MOVEMENT_ID[39];
  if (era.includes('modern') || era.includes('contemporary')) return BY_MOVEMENT_ID[52];
  return BY_MOVEMENT_ID[36];
}

export function resolveMovementInteriorStyle(
  movement: ArtMovement & { era_name?: string }
): MovementInteriorStyle {
  const styleKey = DB_ID_TO_STYLE_KEY[movement.id] ?? movement.id;
  const base = BY_MOVEMENT_ID[styleKey] ?? fallbackByName(movement);
  return blendAccent(base, movement.color);
}

/** @deprecated use surfaces.floor — kept for transitional imports */
export type GalleryFloorKind = string;