const logger = require('@overleaf/logger')
const util = require('util')
const { AffiliationError } = require('../Errors/Errors')
const Features = require('../../infrastructure/Features')
const { User } = require('../../models/User')
const UserDeleter = require('./UserDeleter')
const UserGetter = require('./UserGetter')
const UserUpdater = require('./UserUpdater')
const Analytics = require('../Analytics/AnalyticsManager')
const SplitTestHandler = require('../SplitTests/SplitTestHandler')
const UserOnboardingEmailManager = require('./UserOnboardingEmailManager')
const UserPostRegistrationAnalyticsManager = require('./UserPostRegistrationAnalyticsManager')
const OError = require('@overleaf/o-error')

async function _addAffiliation(user, affiliationOptions) {
  try {
    await UserUpdater.promises.addAffiliationForNewUser(
      user._id,
      user.email,
      affiliationOptions
    )
  } catch (error) {
    throw new AffiliationError('add affiliation failed').withCause(error)
  }

  try {
    user = await UserGetter.promises.getUser(user._id)
  } catch (error) {
    logger.error(
      OError.tag(error, 'could not get fresh user data', {
        userId: user._id,
        email: user.email,
      })
    )
  }
  return user
}

async function recordRegistrationEvent(user) {
  SplitTestHandler.promises
    .getAssignmentForUser(user._id, 'highlight-sso')
    .then(assignment => {
      const segmentation = {
        highlightSSO: assignment.variant === 'active',
      }
      if (user.thirdPartyIdentifiers && user.thirdPartyIdentifiers.length > 0) {
        segmentation.provider = user.thirdPartyIdentifiers[0].providerId
      }
      return Analytics.recordEventForUser(
        user._id,
        'user-registered',
        segmentation
      )
    })
    .catch(err =>
      logger.warn(
        { err },
        'there was an error recording `user-registered` event'
      )
    )
}

async function createNewUser(attributes, options = {}) {
  let user = new User()

  if (attributes.first_name == null || attributes.first_name === '') {
    attributes.first_name = attributes.email.split('@')[0]
  }

  Object.assign(user, attributes)

  user.ace.syntaxValidation = true
  if (user.featureSwitches != null) {
    user.featureSwitches.pdfng = true
  }

  const reversedHostname = user.email.split('@')[1].split('').reverse().join('')

  const emailData = {
    email: user.email,
    createdAt: new Date(),
    reversedHostname,
  }
  if (Features.hasFeature('affiliations')) {
    emailData.affiliationUnchecked = true
  }
  if (
    attributes.samlIdentifiers &&
    attributes.samlIdentifiers[0] &&
    attributes.samlIdentifiers[0].providerId
  ) {
    emailData.samlProviderId = attributes.samlIdentifiers[0].providerId
  }

  user.emails = [emailData]

  user = await user.save()

  if (Features.hasFeature('affiliations')) {
    try {
      user = await _addAffiliation(user, options.affiliationOptions || {})
    } catch (error) {
      if (options.requireAffiliation) {
        await UserDeleter.promises.deleteMongoUser(user._id)
        throw OError.tag(error)
      } else {
        logger.error(OError.tag(error))
      }
    }
  }

  await recordRegistrationEvent(user)
  await Analytics.setUserPropertyForUser(user._id, 'created-at', new Date())
  await Analytics.setUserPropertyForUser(user._id, 'user-id', user._id)
  if (attributes.analyticsId) {
    await Analytics.setUserPropertyForUser(
      user._id,
      'analytics-id',
      attributes.analyticsId
    )
  }

  if (Features.hasFeature('saas')) {
    try {
      await UserOnboardingEmailManager.scheduleOnboardingEmail(user)
      await UserPostRegistrationAnalyticsManager.schedulePostRegistrationAnalytics(
        user
      )
    } catch (error) {
      logger.error(
        OError.tag(error, 'Failed to schedule sending of onboarding email', {
          userId: user._id,
        })
      )
    }
  }

  return user
}

const UserCreator = {
  createNewUser: util.callbackify(createNewUser),
  promises: {
    createNewUser: createNewUser,
  },
}

module.exports = UserCreator