import { Upload, type HttpResponse } from "tus-js-client";
import { getCookie, setCookie } from "@utils";

const AUTH_USER_ID = process.env.AUTH_USER_ID || '';
const CLAIM_NAME = process.env.CLAIM_NAME || '';
const BASE_URL = process.env.NEXT_PUBLIC_SERVER_API_URL || '';
const END_URL = `${BASE_URL}/attach-service/api/v1/tus/upload`;

type UploadOptions = {
  handleUploadStart?: (upload: Upload) => void;
  handleProgress?: (percentage: string) => void;
  handleSuccess?: (upload: Upload) => void;
  handleResponse?: (res: HttpResponse) => void;
};

export const handleUpload = (files: FileList, options?: UploadOptions) => {
  let metadata = {};

  const file = files.item(0);
  if (!file) return;
  metadata = {
    filename: file.name,
    filetype: file.type,
  };

  const upload = new Upload(file, {
    endpoint: END_URL,
    chunkSize: 10 * 1024 * 1024,
    headers: {
      [CLAIM_NAME]: getCookie(CLAIM_NAME) ?? "",
      [AUTH_USER_ID]: getCookie(AUTH_USER_ID) ?? "",
    },
    metadata,
    onError(error) {
      console.error(`Failed because: ${error}`);
    },
    onProgress(bytesUploaded, bytesTotal) {
      const percentage = ((bytesUploaded / bytesTotal) * 100).toFixed(2);
      options?.handleProgress?.(percentage);
    },
    onAfterResponse(req, res) {
      const fileInfo = res.getHeader("X-File-Info");
      if (fileInfo === undefined || fileInfo === null) return;

      setCookie("atfl-cd-key", JSON.parse(fileInfo)?.atflCd ?? "");
      options?.handleResponse?.(res);
    },
    onSuccess() {
      options?.handleSuccess?.(upload);
    },
  });

  upload.start();
  options?.handleUploadStart?.(upload);
};