import { getDownloadURL, ref, uploadBytesResumable } from 'firebase/storage';
import type { StorageFile, UploadResult } from './types';
import getStorage from './getStorage';

/**
 * @function uploadFile
 * @param {StorageFile} file
 * @param {string} pathname
 * @returns {Promise<UploadResult|null>}
 */
export default async function uploadFile(file: StorageFile, pathname: string): Promise<UploadResult> {
  if (!file) {
    throw new Error('No image/file passed');
  }

  const storage = getStorage();
  return new Promise((resolve, reject) => {
    const extensions = pathname.split('.');
    const extension = extensions[extensions.length - 1];
    let hasExtension = false;
    if (typeof extension === 'string' && extension?.length <= 4) {
      hasExtension = true;
    }
    const filePath = hasExtension ? pathname : `${pathname}/${(file as File)?.name ?? Math.random().toString(36).substring(2)}`;
    const storageRef = ref(storage, filePath);

    const uploadTask = uploadBytesResumable(storageRef, file);

    uploadTask.on(
      'state_changed',
      (snapshot) => {
        const progress = (snapshot.bytesTransferred / snapshot.totalBytes) * 100;
        console.log(`Upload is ${progress}% done`, snapshot.bytesTransferred, snapshot.totalBytes, snapshot);
        switch (snapshot.state) {
          case 'paused':
            console.log('Upload is paused');
            break;
          case 'running':
            console.log('Upload is running');
            break;
          case 'canceled':
            console.log('Upload is canceled');
            break;
          case 'success':
            console.log('Upload is completed');
            break;
          case 'error':
            console.log('Upload is completed');
            break;
          default:
            console.log('Upload is running');
            break;
        }
      },
      (error) => {
        console.error('Upload failed:', error);
        reject(error);
      },
      async () => {
        const downloadURL = await getDownloadURL(uploadTask.snapshot.ref);
        resolve({ downloadURL, filePath } as UploadResult);
      }
    );
  });
}