const revhash = require('rev-hash');
const { MEETING_TYPES, MEETING_LOCATIONS, VIDEO_CONFERENCING_TOOLS } = require('../constants');
const { OPTION_STRATEGIES, MeetingOptions } = require('./meeting-options-builder');

const { NEXT_THREE_DAYS } = OPTION_STRATEGIES;

class SchedulingAttempt {
  constructor() {
    this.descriptionText = 'Meeting Description';
    this.meetingType = MEETING_TYPES['Groups (Schedex)'];
    this.videoConferencingProvider = null;
    this.meetingTitle = 'Meeting Title';
    this.allDayOptions = false;
    this.locations = [];
  }

  withMeetingType(meetingType) {
    this.meetingType = meetingType;
    return this;
  }

  withMeetingTitle(meetingTitle) {
    this.meetingTitle = meetingTitle;
    return this;
  }

  withAllDayOptions(value) {
    this.allDayOptions = value;
    return this;
  }

  withLocationText(locationText) {
    this.locations.push({
      value: locationText,
      type: MEETING_LOCATIONS.Text,
    });
    return this;
  }

  withDescriptionText(descriptionText) {
    this.descriptionText = descriptionText;
    return this;
  }

  withVideoConferencingProvider(videoConferencingProvider) {
    if (Object.values(VIDEO_CONFERENCING_TOOLS).includes(videoConferencingProvider)) {
      this.videoConferencingProvider = videoConferencingProvider;

      this.locations.push({
        type: videoConferencingProvider,
        value: '',
      });
    }
    return this;
  }

  build() {
    return {
      // TODO: What will break if we don't supply this availabilityCalendars value?
      // TODO: Where can we fetch this availabilityCalendars calendar id?
      availabilityCalendars: [],
      preCreationSchedulingAttemptId: revhash(new Date().toUTCString()),
      title: this.meetingTitle,
      description: this.descriptionText,
      timezone: 'Europe/Zurich',
      state: 'OPEN',
      type: this.meetingType,
      options: new MeetingOptions()
        .withGenerationStrategy(NEXT_THREE_DAYS)
        .withAllDayOptions(this.allDayOptions)
        .build(),
      locations: this.locations,
      features: {
        automaticReminder: false,
        deadline: null,
        isHidden: false,
        voteLimitPerOption: null,
      },
      notifyOrganizer: false,
      questions: [],
      lockTimezone: true,
      syncQuestions: true,
    };
  }
}

module.exports = SchedulingAttempt;