// logan.js
// Copyright (C) 2023 DTP Technologies, LLC
// License: Apache-2.0

'use strict';

const os = require('os');

const { SiteService, SiteError } = require('../../lib/site-lib');

class LoganService extends SiteService {

  constructor (dtp) {
    super(dtp, module.exports);
  }

  async start ( ) {
    await super.start();
  }

  async sendRequestEvent (component, req, event) {
    if (req.user) {
      event.data = event.data || { };
      event.data.user = {
        _id: req.user._id,
        username: req.user.username,
      };
    }
    event.ip = req.ip;
    return this.sendEvent(component, event);
  }

  async sendEvent (component, event) {
    try {
      event.host = os.hostname();
      event['component.slug'] = component.slug;
      event['component.name'] = component.className || component.name;

      this.log[event.level]('application event', { event });

      if (process.env.DTP_LOGAN !== 'enabled') {
        return;
      }

      const loganScheme = process.env.DTP_LOGAN_SCHEME || 'http';
      const loganUrl = `${loganScheme}://${process.env.DTP_LOGAN_HOST}/api/event`;
      const payload = JSON.stringify(event);

      const response = await fetch(loganUrl, {
        method: 'POST',
        headers: {
          'Content-Type': 'application/json',
          'Content-Length': payload.length,
          'X-LogAn-Auth': process.env.DTP_LOGAN_API_KEY,
        },
        body: payload,
      });

      const json = await response.json();
      if (!json.success) {
        throw new SiteError(500, json.message);
      }

      return json;
    } catch (error) {
      this.log.error('failed to send LOGAN event', { event, error });
      // fall through
    }
  }
}

module.exports = {
  slug: 'logan',
  name: 'logan',
  className: 'LoganService',
  create: (dtp) => { return new LoganService(dtp); },
};