import { upload, UploadResult } from "../deno-gyazo/mod.ts";
import { getGyazoToken } from "../scrapbox-userscript-std/rest.ts";

export type Result<T> = { success: false; reason: unknown; } | { success: true; value: T; };

export interface UploadOptions {
  title?: string;
  refererURL?: string;
  app?: string;
  noIndex?: boolean;
  accessToken?: string;
}
export async function* uploadBulk(
  images: File[],
  uploadOptions?: UploadOptions,
): AsyncGenerator<Result<UploadResult & { index: number; name: string; }>, void, unknown> {
  const { noIndex, accessToken: token, ...options } = uploadOptions ?? {};
  // access token取得
  const accessToken = token ?? await (async () => {
    const result = await getGyazoToken();
    if (!result.ok) throw new Error(JSON.stringify(result.value));
    const accessToken = result.value;
    if (!accessToken) throw new Error("Could not get the access token");
    return accessToken;
  })();
  
  const zero = (n: number) => `${n}`.padStart(`${images.length}`.length, "0");
  // 一枚ずつuploadして返す
  for (let index = 0; index < images.length; index++) {
    const result = await upload(images[index], {
      accessToken,
      description: `${images[index].name}${noIndex === true ? "" :` ${zero(index + 1)}`}`,
      ...options,
    });
    if (!result.ok) {
      yield { success: false, reason: result.value };
      continue;
    }
    yield { success: true, value: { index, name: images[index].name, ...result.value } };
  }
}