import * as plugins from './smartrequest.plugins';
import * as interfaces from './smartrequest.interfaces';
import { request } from './smartrequest.request';

/**
 * the interfae for FormFieldData
 */
export interface IFormField {
  name: string;
  type: 'string' | 'filePath' | 'Buffer';
  payload: string;
}

const appendFormField = async (formDataArg: plugins.formData, formDataField: IFormField) => {
  if (formDataField.type === 'filePath') {
    const fileData = plugins.fs.readFileSync(plugins.path.join(process.cwd(), formDataField.payload));
    formDataArg.append('file', fileData, {
      filename: 'upload.pdf',
      contentType: 'application/pdf'
    });
  }
};

export const postFormData = async (
  urlArg: string,
  optionsArg: interfaces.ISmartRequestOptions = {},
  payloadArg: IFormField[]
) => {
  const form = new plugins.formData();
  for (const formField of payloadArg) {
    await appendFormField(form, formField);
  }
  const requestOptions = {...optionsArg, 
    method: 'POST',
    headers: {
      ...optionsArg.headers,
      ...form.getHeaders()
    },
    requestBody: form};

  // lets fire the actual request for sending the formdata
  const response = await request(urlArg, requestOptions);
  return response;
};