import { removeObjectEmptyFields } from "https://deno.land/x/windmill_helpers@v1.0.0/mod.ts";

/**

 * @param members_to_add *(optional)* An array of emails to be used for a static segment.

 * Any emails provided that are not present on the list will be ignored.

 * A maximum of 500 members can be sent.

 *

 * @param members_to_remove *(optional)* An array of emails to be used for a static segment.

 * Any emails provided that are not present on the list will be ignored.

 * A maximum of 500 members can be sent.

 */

type Mailchimp = {

  api_key: string;

  server: string;

};

export async function main(

  auth: Mailchimp,

  list_id: string,

  segment_id: string,

  members_to_add?: string[],

  members_to_remove?: string[],

) {

  const url = new URL(

    `https://${auth.server}.api.mailchimp.com/3.0/lists/${list_id}/segments/${segment_id}`,

  );

  const body = {

    members_to_add,

    members_to_remove,

  };

  removeObjectEmptyFields(body, true, false);

  if (!Object.keys(body).length) {

    return "No members were declared to be added or removed.";

  }

  const response = await fetch(url, {

    method: "POST",

    headers: {

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

    },

    body: JSON.stringify(body),

  });

  if (!response.ok) {

    throw Error(await response.text());

  }

  return await response.json();

}