const { formatCurrency } = require('../../util/currency')
const GroupPlansData = require('./GroupPlansData')
const { isStandaloneAiAddOnPlanCode } = require('./AiHelper')

/**
 * If the user changes to a less expensive plan, we shouldn't apply the change immediately.
 * This is to avoid unintended/artifical credits on users Recurly accounts.
 */
function shouldPlanChangeAtTermEnd(oldPlan, newPlan, isInTrial) {
  if (isInTrial) {
    // we should always upgrade or downgrade immediately if actively in trial
    return false
  }

  if (
    oldPlan.annual === newPlan.annual &&
    isStandaloneAiAddOnPlanCode(oldPlan.planCode) &&
    !isStandaloneAiAddOnPlanCode(newPlan.planCode)
  ) {
    // changing from an standalone AI add-on plan to a non-AI plan should not be considered a downgrade
    return false
  }
  return oldPlan.price_in_cents > newPlan.price_in_cents
}

/**
 * @import { CurrencyCode } from '../../../../types/subscription/currency'
 */

/**
 * @typedef {Object} PlanToPrice
 * @property {string} collaborator
 * @property {string} professional
 */

/**
 * @typedef {Object} LocalizedGroupPrice
 * @property {PlanToPrice} price
 * @property {PlanToPrice} pricePerUser
 */

/**
 * @param {CurrencyCode} recommendedCurrency
 * @param {string} locale
 * @returns {LocalizedGroupPrice}
 */
function generateInitialLocalizedGroupPrice(recommendedCurrency, locale) {
  const INITIAL_LICENSE_SIZE = 2

  // the price is in cents, so divide by 100 to get the value
  const collaboratorPrice =
    GroupPlansData.enterprise.collaborator[recommendedCurrency][
      INITIAL_LICENSE_SIZE
    ].price_in_cents / 100
  const collaboratorPricePerUser = collaboratorPrice / INITIAL_LICENSE_SIZE
  const professionalPrice =
    GroupPlansData.enterprise.professional[recommendedCurrency][
      INITIAL_LICENSE_SIZE
    ].price_in_cents / 100
  const professionalPricePerUser = professionalPrice / INITIAL_LICENSE_SIZE

  /**
   * @param {number} price
   * @returns {string}
   */
  const formatPrice = price =>
    formatCurrency(price, recommendedCurrency, locale, true)

  return {
    price: {
      collaborator: formatPrice(collaboratorPrice),
      professional: formatPrice(professionalPrice),
    },
    pricePerUser: {
      collaborator: formatPrice(collaboratorPricePerUser),
      professional: formatPrice(professionalPricePerUser),
    },
  }
}

function isPaidSubscription(subscription) {
  const hasRecurlySubscription =
    subscription?.recurlySubscription_id &&
    subscription?.recurlySubscription_id !== ''
  const hasStripeSubscription =
    subscription?.paymentProvider?.subscriptionId &&
    subscription?.paymentProvider?.subscriptionId !== ''
  return !!(subscription && (hasRecurlySubscription || hasStripeSubscription))
}

function isIndividualActivePaidSubscription(subscription) {
  return (
    isPaidSubscription(subscription) &&
    subscription?.groupPlan === false &&
    subscription?.recurlyStatus?.state !== 'canceled' &&
    subscription?.paymentProvider?.state !== 'canceled'
  )
}

function getPaymentProviderSubscriptionId(subscription) {
  if (subscription?.recurlySubscription_id) {
    return subscription.recurlySubscription_id
  }
  if (subscription?.paymentProvider?.subscriptionId) {
    return subscription.paymentProvider.subscriptionId
  }
  return null
}

function getPaidSubscriptionState(subscription) {
  if (subscription?.recurlyStatus?.state) {
    return subscription.recurlyStatus.state
  }
  if (subscription?.paymentProvider?.state) {
    return subscription.paymentProvider.state
  }
  return null
}

function getSubscriptionTrialStartedAt(subscription) {
  if (subscription?.recurlyStatus?.trialStartedAt) {
    return subscription.recurlyStatus?.trialStartedAt
  }
  return subscription?.paymentProvider?.trialStartedAt
}

function getSubscriptionTrialEndsAt(subscription) {
  if (subscription?.recurlyStatus?.trialEndsAt) {
    return subscription.recurlyStatus?.trialEndsAt
  }
  return subscription?.paymentProvider?.trialEndsAt
}

function isInTrial(trialEndsAt) {
  if (!trialEndsAt) {
    return false
  }

  return trialEndsAt.getTime() > Date.now()
}

module.exports = {
  shouldPlanChangeAtTermEnd,
  generateInitialLocalizedGroupPrice,
  isPaidSubscription,
  isIndividualActivePaidSubscription,
  getPaymentProviderSubscriptionId,
  getPaidSubscriptionState,
  getSubscriptionTrialStartedAt,
  getSubscriptionTrialEndsAt,
  isInTrial,
}