type Asana = {

  token: string;

};

/**

 * Add a custom field to a project

 * Custom fields are associated with projects by way of custom field settings.  This method creates a setting for the project.

 */

export async function main(

  auth: Asana,

  project_gid: string,

  opt_pretty: string | undefined,

  body: {

    data?: {

      custom_field: string;

      insert_after?: string;

      insert_before?: string;

      is_important?: boolean;

      [k: string]: unknown;

    };

    [k: string]: unknown;

  }

) {

  const url = new URL(

    `https://app.asana.com/api/1.0/projects/${project_gid}/addCustomFieldSetting`

  );

  for (const [k, v] of [["opt_pretty", opt_pretty]]) {

    if (v !== undefined && v !== "") {

      url.searchParams.append(k, v);

    }

  }

  const response = await fetch(url, {

    method: "POST",

    headers: {

      "Content-Type": "application/json",

      Authorization: "Bearer " + auth.token,

    },

    body: JSON.stringify(body),

  });

  if (!response.ok) {

    const text = await response.text();

    throw new Error(`${response.status} ${text}`);

  }

  return await response.json();

}