'use strict';

const { v4 } = require('uuid');
const _ = require('lodash');

class FakeNantumModule {
  constructor({ events, vens } = {}) {
    this.vens = vens || [];
    this.events = events || [];
    this.eventResponses = [];
    this.reportReadings = [];
  }

  async getVen(clientCertificateFingerprint) {
    return _.find(this.vens, {
      client_certificate_fingerprint: clientCertificateFingerprint,
    });
  }

  async createVen(ven) {
    const venId = v4();
    const newVen = { ...ven, _id: venId };
    this.vens.push(newVen);
  }

  async updateVen(venId, newProperties) {
    const venIndex = _.findIndex(this.vens, { _id: venId });
    if (venIndex == null)
      throw new Error(`Could not find ven with _id: ${venId}`);
    this.vens[venIndex] = { ...this.vens[venIndex], ...newProperties };
  }

  async getEventResponse(ven, eventId, modificationNumber) {
    return _.find(this.eventResponses, {
      ven_id: ven._id,
      event_id: eventId,
      modification_number: modificationNumber,
    })[0];
  }

  async createEventResponse(eventResponse) {
    const eventResponseId = v4();
    const newEventResponse = { ...eventResponse, _id: eventResponseId };
    this.eventResponses.push(newEventResponse);
  }

  async updateEventResponse(id, newProperties) {
    const eventResponseIndex = _.findIndex(this.eventResponses, { _id: id });
    if (eventResponseIndex == null)
      throw new Error(`Could not find eventResponse with _id: ${id}`);
    this.eventResponses[eventResponseIndex] = {
      ...this.eventResponses[eventResponseIndex],
      ...newProperties,
    };
  }

  async markEventAsSeen(ven, eventId, modificationNumber) {
    const existing = ven.seen_events || [];
    const newVen = {
      ...ven,
      seen_events: [
        ...existing,
        {
          event_id: eventId,
          modification_number: modificationNumber,
        },
      ],
    };
    await this.updateVen(ven._id, newVen);
  }

  async getEvents() {
    return [...this.events];
  }

  async sendReportReadings(ven, readings) {
    this.reportReadings.push({ ven: ven._id, readings });
  }
}

module.exports = FakeNantumModule;