import * as plugins from './mailgun.plugins';
import * as interfaces from './interfaces';

export class MailgunAccount {
  public baseUrl = 'https://api.mailgun.net/v3';
  public apiToken: string;

  constructor(apiTokenArg: string) {
    this.apiToken = apiTokenArg;
  }

  public async getRequest(routeArg: string, binaryArg: boolean = false) {
    let requestUrl = routeArg;
    const needsBaseUrlPrefix = !routeArg.startsWith('https://');
    needsBaseUrlPrefix ? requestUrl = `${this.baseUrl}${routeArg}` : null;
    console.log(requestUrl);
    const requestOptions: plugins.smartrequest.ISmartRequestOptions = {
      method: 'GET',
      headers: {
        Authorization: `Basic ${plugins.smartstring.base64.encode(
          `api:${this.apiToken}`
        )}`,
        'Content-Type': 'application/json'
      }
    };
    let response: plugins.smartrequest.IExtendedIncomingMessage;
    if (!binaryArg) {
      response = await plugins.smartrequest.request(requestUrl, requestOptions);
    } else {
      response = await plugins.smartrequest.getBinary(requestUrl, requestOptions);
    }
    return response;
  }

  public async postFormData(routeArg: string, formFields: plugins.smartrequest.IFormField[]) {
    const requestUrl = `${this.baseUrl}${routeArg}`; // TODO;
    const response = await plugins.smartrequest.postFormData(
      requestUrl,
      {
        headers: {
          Authorization: `Basic ${plugins.smartstring.base64.encode(
            `api:${this.apiToken}`
          )}`
        }
      },
      formFields
    );
    return response;
  }

  /**
   * sends a SmartMail
   */
  public async sendSmartMail(smartmailArg: plugins.smartmail.Smartmail<interfaces.IMailgunMessage>, toArg: string, dataArg = {}) {
    const domain = smartmailArg.options.from.split('@')[1].replace('>', '');
    const formFields: plugins.smartrequest.IFormField[] = [
      {
        name: 'from',
        type: 'string',
        payload: smartmailArg.options.from
      },
      {
        name: 'to',
        type: 'string',
        payload: toArg
      },
      {
        name: 'subject',
        type: 'string',
        payload: smartmailArg.getSubject(dataArg)
      },
      {
        name: 'html',
        type: 'string',
        payload: smartmailArg.getBody(dataArg)
      }
    ];

    console.log(smartmailArg.attachments);

    for (const attachment of smartmailArg.attachments) {
      formFields.push({
        name: 'attachment',
        type: 'Buffer',
        payload: attachment.contentBuffer,
        fileName: attachment.parsedPath.base
      });
    }

    const response = await this.postFormData(`/${domain}/messages`, formFields);
    if (response.statusCode === 200) {
      return response.body;
    } else {
      console.log(response.body);
      throw new Error('could not send email');
    }
  }

  public async retrieveSmartMailFromMessageUrl(messageUrlArg: string) {
    const response = await this.getRequest(messageUrlArg);
    if (response.statusCode === 404) {
      console.log(response.body.message);
      return null;
    }
    const responseBody: interfaces.IMailgunMessage = response.body;
    const smartmail = new plugins.smartmail.Smartmail<interfaces.IMailgunMessage>({
      from: responseBody.From,
      body: responseBody["body-html"],
      subject: responseBody.Subject,
      creationObjectRef: responseBody
    });

    // lets care about attachments
    if (responseBody.attachments && responseBody.attachments instanceof Array) {
      for (const attachmentInfo of responseBody.attachments) {
        const attachmentName = attachmentInfo.name;
        const attachmentContents = await this.getRequest(attachmentInfo.url, true);
        smartmail.addAttachment(new plugins.smartfile.Smartfile({
          path: `./${attachmentName}`,
          base: `./${attachmentName}`,
          contentBuffer: attachmentContents.body
        }));
      }
    }

    return smartmail;
  }
  
  public async retrieveSmartMailFromNotifyPayload(notifyPayloadArg: any) {
    return await this.retrieveSmartMailFromMessageUrl(notifyPayloadArg['message-url']);
  }
}