import type { Base64 } from "https://deno.land/x/windmill@v1.85.0/mod.ts";

import { decode } from "https://deno.land/std@0.152.0/encoding/base64.ts";

type Slack = {

  token: string;

};

export async function main(

  image: Base64,

  channel: string,

  slack: Slack,

  imagename: string = "image.png",

) {

  const formData = new FormData();

  formData.append("token", slack.token);

  formData.append("file", new File([decode(image)], imagename));

  formData.append("channels", channel);

  formData.append("filename", "image.png");

  formData.append("filetype", imagename);

  return await (

    await fetch("https://slack.com/api/files.upload", {

      method: "POST",

      body: formData,

    })

  ).json();

}