import {
  type MembershipLevel,
  MembershipLevelEnum,
} from "@scandic-hotels/common/constants/membershipLevels"

import type { User } from "@scandic-hotels/trpc/types/user"

export function isHighestMembership(
  membershipLevel: MembershipLevel | undefined
) {
  return membershipLevel == MembershipLevelEnum.L7
}

export function getInitials(
  firstName: User["firstName"],
  lastName: User["lastName"]
) {
  if (!firstName || !lastName) return null
  const firstInitial = firstName.charAt(0).toUpperCase()
  const lastInitial = lastName.charAt(0).toUpperCase()
  return `${firstInitial}${lastInitial}`
}

export function getSteppedUpLevel(
  currentValue: MembershipLevel,
  stepsUp: number
): MembershipLevel {
  const values = Object.values(MembershipLevelEnum)
  const currentIndex = values.indexOf(currentValue as MembershipLevelEnum)
  if (currentIndex === -1 || currentIndex === values.length - 1) {
    return currentValue
  }
  return values[currentIndex + stepsUp]
}