import {McUtilsAPIError} from "../types/error";

export default class WebRequest {
  /**
   * Gets a response from the given URL.
   *
   * @param url the url
   * @returns the response
   */
  public static get<T>(url: string): Promise<T> {
    return new Promise(async (resolve, reject) => {
      try {
        const response = await fetch(url, {
          headers: {
            "User-Agent": "McUtils-JS-Library/1.0",
          },
        });

        // Resolve with a buffer if the content type is an image
        if (response.headers.get("content-type")?.includes("image/")) {
          const arrayBuffer = await response.arrayBuffer();
          resolve(Buffer.from(arrayBuffer) as unknown as T);
          return;
        }

        const data = await response.json();

        // Reject if the status code is not 200
        if (!response.ok) {
          reject(data as McUtilsAPIError);
          return;
        }

        // Resolve with a buffer if the content type is an image
        if (response.headers.get("content-type")?.includes("image/")) {
          const arrayBuffer = await response.arrayBuffer();
          resolve(Buffer.from(arrayBuffer) as unknown as T);
          return;
        }

        // Resolve with the data
        resolve(data as T);
      } catch (error) {
        reject(error);
      }
    });
  }
}