/**
 * 背景来源汇总出口。
 *
 * 各来源都写成一个自包含模块，统一产出 `BackgroundAsset`（形状见 `@/types`）：
 *   - upload.ts    本地文件 → object URL
 *   - geometry.ts  预设几何底纹：纯函数派生 + 渲染；`GEOMETRY_PRESETS` 是
 *                  新背景菜单的卡片数据源（固定图案 + 人工配色，无种子），
 *                  `GEOMETRY_KINDS` 是 legacy 的种子随机配色 4 种
 *   - pexels.ts / unsplash.ts  图库搜索，都实现 `PhotoProvider` 接口，
 *                  Pexels 在前（`PHOTO_PROVIDERS` 见 providers.ts）
 *
 * T4 时代的 legacy 函数面（`searchUnsplash` / `toAsset` 等）保留到旧
 * SourcePanel 被 t13 清掉为止；新界面一律走 `PHOTO_PROVIDERS`。
 */

export { fromUpload, releaseObjectUrl, pickImageFiles } from "./upload";

export {
  deriveGeometryParams,
  derivePresetParams,
  renderGeometry,
  geometryToDataUrl,
  createGeometryAsset,
  createPresetAsset,
  GEOMETRY_KINDS,
  GEOMETRY_PRESETS,
  contrastToWhite,
  relativeLuminance,
} from "./geometry";
export type {
  GeometryParams,
  GeometryKind,
  RenderKind,
  GeometryPreset,
  RGB,
} from "./geometry";

export {
  unsplashStatus,
  searchUnsplash,
  trackDownload,
  toAsset,
  parseUnsplashResponse,
  unsplashProvider,
} from "./unsplash";
export type { UnsplashStatus, UnsplashPhoto } from "./unsplash";

export { parsePexelsResponse, pexelsProvider } from "./pexels";

export { PHOTO_PROVIDERS, providerById, PhotoProviderError } from "./providers";

export type {
  BackgroundAsset,
  Attribution,
  StockPhoto,
  PhotoProvider,
  PhotoProviderId,
  PhotoProviderStatus,
} from "../types";