type Openai = {

  api_key: string;

  organization_id: string;

};

type Base64 = string;

/**

 * Create file

 * Upload a file that can be used across various endpoints. The size of all the files uploaded by one organization can be up to 100 GB.

The size of individual files can be a maximum of 512 MB or 2 million tokens for Assistants. See the Assistants Tools guide to learn more about the types of files supported. The Fine-tuning API only supports `.jsonl` files.

Please [contact us](https://help.openai.com/) if you need to increase these storage limits.

 */

export async function main(

  auth: Openai,

  body: {

    file: {

      base64: Base64;

      type:

        | "image/png"

        | "image/jpeg"

        | "image/gif"

        | "application/pdf"

        | "appication/json"

        | "text/csv"

        | "text/plain"

        | "audio/mpeg"

        | "audio/wav"

        | "video/mp4";

      name: string;

    };

    purpose: "fine-tune" | "assistants";

  }

) {

  const url = new URL(`https://api.openai.com/v1/files`);

  const formData = new FormData();

  for (const [k, v] of Object.entries(body)) {

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

      if (["file"].includes(k)) {

        const { base64, type, name } = v as {

          base64: Base64;

          type: string;

          name: string;

        };

        formData.append(

          k,

          new Blob([Uint8Array.from(atob(base64), (m) => m.codePointAt(0)!)], {

            type,

          }),

          name

        );

      } else {

        formData.append(k, String(v));

      }

    }

  }

  const response = await fetch(url, {

    method: "POST",

    headers: {

      "OpenAI-Organization": auth.organization_id,

      Authorization: "Bearer " + auth.api_key,

    },

    body: formData,

  });

  if (!response.ok) {

    const text = await response.text();

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

  }

  return await response.json();

}