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

import { serverClient } from "@/lib/trpc/server"

import { isHighestMembership } from "@/utils/user"

import { type LevelProgressData, type ProgressCalculation } from "./types"

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

export async function getLevelProgressData(
  membership: NonNullable<NativeFriendsMembership>
): Promise<LevelProgressData> {
  const caller = await serverClient()
  const currentLevel = await caller.contentstack.loyaltyLevels.byLevel({
    level: MembershipLevelEnum[membership.tier],
  })

  const earned = membership.tierPoints ?? 0

  // Check if user has points left to retain their current level.
  const toKeepCurrent =
    currentLevel?.required_points && earned < currentLevel.required_points
      ? currentLevel.required_points - earned
      : undefined

  if (isHighestMembership(membership.tier)) {
    return toKeepCurrent
      ? {
          type: "highest-incomplete",
          earned,
          toKeepCurrent,
          required: currentLevel!.required_points,
        }
      : { type: "highest-complete", earned }
  }

  return {
    type: "lower-level",
    earned,
    toNext: membership.pointsToNextTier ?? 0,
    toKeepCurrent,
  }
}

export function calculateProgress(
  earned: number,
  total: number,
  keepThreshold?: number
): ProgressCalculation {
  const percentage = (earned / total) * 100
  const markerPosition = keepThreshold
    ? ((earned + keepThreshold) / total) * 100
    : undefined

  return { percentage, markerPosition, total }
}