import {

  getState,

  setState,

} from "https://deno.land/x/windmill@v1.85.0/mod.ts";

import { drive } from "npm:@googleapis/drive@4";

const PAGE_SIZE = 500 as const;

/**

 * @returns A list of newly uploaded files in ascending order

 * of creation date.

 * Maximum number of returned items is set to `500` for each run.

 */

type Gdrive = {

  token: string;

};

export async function main(auth: Gdrive) {

  const client = drive({

    version: "v3",

    headers: {

      Authorization: `Bearer ${auth.token}`,

    },

  });

  const lastCheck = await getState();

  await setState(new Date().toISOString());

  const response = await client.files.list({

    q: lastCheck ? `createdTime > '${lastCheck}'` : undefined,

    orderBy: "createdTime asc",

    pageSize: PAGE_SIZE,

  });

  if (response.data.nextPageToken && response?.data?.files?.at(-1)) {

    const lastItem = await client.files.get({

      fileId: response.data.files.at(-1)?.id || undefined,

      fields: "createdTime",

    });

    const date = lastItem?.data?.createdTime;

    if (date) {

      await setState(date);

    }

  }

  return response.data.files;

}