import type {
  ApiReward,
  RedeemableCoupon,
  SurpriseReward,
} from "../../../types/reward"

export function getRedeemableRewards(rewards: ApiReward[]) {
  return rewards
    .filter((reward) => {
      if ("coupon" in reward && reward.coupon.length > 0) {
        if (reward.coupon.every((coupon) => coupon.state === "redeemed")) {
          return false
        }
      }
      return true
    })
    .filter((reward) => {
      if (isSurpriseReward(reward)) {
        return !reward.coupon.some(({ unwrapped }) => !unwrapped)
      }
      return true
    })
}

function isSurpriseReward(reward: ApiReward): reward is SurpriseReward {
  return reward.rewardType === "Surprise"
}

export function getUnwrappedSurpriseRewards(rewards: ApiReward[]) {
  return rewards
    .filter(isSurpriseReward)
    .filter((reward) => getReedemableCoupons(reward).length)
    .filter((reward) => {
      const unwrappedCoupons =
        reward.coupon.filter((coupon) => !coupon.unwrapped) || []

      return unwrappedCoupons.length
    })
}

export function getReedemableCoupons(reward: ApiReward): RedeemableCoupon[] {
  if ("coupon" in reward) {
    return reward.coupon.filter(
      (coupon): coupon is RedeemableCoupon => coupon.state !== "redeemed"
    )
  }
  return []
}