export type RoomBackgroundId =

  | "room-day"

  | "room-dusk"

  | "room-night"

  | "room-forest";



export type RoomBackgroundLayer = {

  id: string;

  className: string;

  speed: number;

};



export type RoomBackground = {

  id: RoomBackgroundId;

  name: string;

  free: boolean;

  previewClassName: string;

  layers: RoomBackgroundLayer[];

};



export const DEFAULT_ROOM_BACKGROUND: RoomBackgroundId = "room-day";



export const ROOM_BACKGROUNDS: RoomBackground[] = [

  {

    id: "room-day",

    name: "Sunny Field",

    free: true,

    previewClassName: "bg-gradient-to-b from-sky-400 via-sky-300 to-lime-400",

    layers: [

      { id: "sky", className: "bg-gradient-to-b from-sky-500 via-sky-300 to-sky-200", speed: 0.15 },

      { id: "clouds", className: "bg-[radial-gradient(circle_at_20%_30%,rgba(255,255,255,0.85)_0%,transparent_35%),radial-gradient(circle_at_70%_20%,rgba(255,255,255,0.7)_0%,transparent_30%)]", speed: 0.35 },

      { id: "hills", className: "bg-[linear-gradient(to_top,#3d8b37_0%,#3d8b37_40%,transparent_40%),radial-gradient(ellipse_120%_80%_at_50%_100%,#2f6f2c_0%,transparent_70%)]", speed: 0.55 },

      { id: "grass", className: "bg-[repeating-linear-gradient(90deg,rgba(0,0,0,0.06)_0_2px,transparent_2px_6px)] opacity-40", speed: 0.75 },

    ],

  },

  {

    id: "room-dusk",

    name: "Golden Dusk",

    free: true,

    previewClassName: "bg-gradient-to-b from-orange-400 via-pink-400 to-indigo-700",

    layers: [

      { id: "sky", className: "bg-gradient-to-b from-orange-500 via-rose-400 to-indigo-800", speed: 0.12 },

      { id: "sun", className: "bg-[radial-gradient(circle_at_50%_85%,rgba(255,220,120,0.95)_0%,rgba(255,160,80,0.35)_18%,transparent_45%)]", speed: 0.25 },

      { id: "hills", className: "bg-[radial-gradient(ellipse_130%_70%_at_50%_100%,#1f2937_0%,transparent_72%)]", speed: 0.5 },

      { id: "stars", className: "bg-[radial-gradient(circle,#fff_1px,transparent_1px)] bg-[length:18px_18px] opacity-20", speed: 0.65 },

    ],

  },

  {

    id: "room-night",

    name: "Starlit Night",

    free: false,

    previewClassName: "bg-gradient-to-b from-indigo-950 via-violet-900 to-slate-900",

    layers: [

      { id: "sky", className: "bg-gradient-to-b from-indigo-950 via-violet-900 to-slate-900", speed: 0.1 },

      { id: "stars", className: "bg-[radial-gradient(circle,#fff_1.5px,transparent_1.5px)] bg-[length:22px_22px] opacity-80", speed: 0.3 },

      { id: "moon", className: "bg-[radial-gradient(circle_at_78%_18%,rgba(255,255,220,0.95)_0%,rgba(255,255,220,0.15)_8%,transparent_20%)]", speed: 0.2 },

      { id: "ground", className: "bg-[linear-gradient(to_top,#111827_0%,#111827_35%,transparent_35%)]", speed: 0.6 },

    ],

  },

  {

    id: "room-forest",

    name: "Mystic Forest",

    free: false,

    previewClassName: "bg-gradient-to-b from-emerald-900 via-green-900 to-lime-950",

    layers: [

      { id: "sky", className: "bg-gradient-to-b from-emerald-950 via-green-900 to-lime-950", speed: 0.14 },

      { id: "mist", className: "bg-[radial-gradient(circle_at_30%_60%,rgba(180,255,200,0.25)_0%,transparent_45%),radial-gradient(circle_at_70%_40%,rgba(180,255,200,0.18)_0%,transparent_40%)]", speed: 0.4 },

      { id: "trees", className: "bg-[repeating-linear-gradient(90deg,rgba(0,0,0,0.35)_0_14px,transparent_14px_28px)] opacity-50", speed: 0.55 },

      { id: "floor", className: "bg-[linear-gradient(to_top,#14532d_0%,#14532d_30%,transparent_30%)]", speed: 0.7 },

    ],

  },

];



const ROOM_MAP = new Map(ROOM_BACKGROUNDS.map((room) => [room.id, room]));



const LEGACY_ROOM_IDS = new Set(["room-space", "room-neon"]);



export function getRoomBackground(id: string | null | undefined): RoomBackground {

  if (id && LEGACY_ROOM_IDS.has(id)) {

    return ROOM_MAP.get(DEFAULT_ROOM_BACKGROUND)!;

  }



  return ROOM_MAP.get((id as RoomBackgroundId) ?? DEFAULT_ROOM_BACKGROUND) ?? ROOM_MAP.get(DEFAULT_ROOM_BACKGROUND)!;

}



export function isValidRoomBackgroundId(id: string): id is RoomBackgroundId {

  return ROOM_MAP.has(id as RoomBackgroundId);

}



export function normalizeRoomBackgroundId(id: string | null | undefined): RoomBackgroundId {

  if (id && LEGACY_ROOM_IDS.has(id)) {

    return DEFAULT_ROOM_BACKGROUND;

  }



  if (id && isValidRoomBackgroundId(id)) {

    return id;

  }



  return DEFAULT_ROOM_BACKGROUND;

}



export function isRoomBackgroundUnlocked(

  roomId: RoomBackgroundId,

  ownedItemIds: readonly string[],

): boolean {

  const room = getRoomBackground(roomId);

  if (room.free) {

    return true;

  }



  return ownedItemIds.includes(roomId);

}



export function getShopRoomBackgrounds() {

  return ROOM_BACKGROUNDS.filter((room) => !room.free).map((room) => ({

    id: room.id,

    name: room.name,

    type: "room" as const,

    price: room.id === "room-night" ? 40 : 50,

    image_path: "",

  }));

}