import { getImage } from "../deno-gyazo/mod.ts";
import { getGyazoToken } from "../scrapbox-userscript-std/rest.ts";
import { pool, Result } from "../async-lib/mod.ts";

export type { Result };
export interface ImageResult {
  url: string;
  text: string;
}

export async function* getOCRs(
  images: Iterable<string | URL>,
  accessToken: string,
): AsyncGenerator<Result<ImageResult>, void, unknown> {
  const reader = pool(
    10,
    images,
    async (image): Promise<ImageResult> => {
      const id = image.toString().match(/\/([^\/]+)$/)?.[1];
      if (!id) throw new Error(`Could not find Gyazo ID from "${image}"`);
      const result = await getImage(id, { accessToken });
      if (!result.ok) throw new Error(JSON.stringify(result.ok));
      const { permalink_url, ocr } = result.value;
      return { url: permalink_url, text: ocr?.description || "" };
    },
  );
  
  // 順番を壊さずに返す
  for (const result of reader) {
    yield await result;
  }
}