{-# LANGUAGE TemplateHaskell #-}

module PayPal.Adaptive.Core.PayResponse.PayStatus where

import           Data.Aeson.TH
import           Data.Char (toUpper)

import           Import

-- | This refers to the processing of this request. To make sure a payment
-- has actually gone through, check 'TransactionStatus' as well.
--
-- PayPal returns this using the JSON object key "paymentExecStatus"
-- in responses to Withdrawal and Deposit and "status" in responses to
-- LookupPayment.
--
-- https://developer.paypal.com/docs/classic/api/adaptive-payments/PaymentDetails_API_Operation/
data PayStatus
  = PeCreated
  -- ^ CREATED – The payment request was received; funds will be transferred once the payment is approved
  | PeCompleted
  -- ^ COMPLETED – The payment was successful
  | PePending
  -- ^ PENDING – The payment is awaiting processing
  | PeProcessing
  -- ^ PROCESSING – The payment is in progress
  | PeIncomplete
  -- ^ INCOMPLETE – Some transfers succeeded and some failed for a parallel payment or,
  -- for a delayed chained payment, secondary receivers have not been paid
  | PeExpired
  -- ^ EXPIRED
  --
  -- NOTE: This occurs in practice, but isn't in the documentation.
  | PeError
  -- ^ ERROR – The payment failed and all attempted transfers failed or all completed transfers
  -- were successfully reversed
  | PeReversalError
  -- ^ REVERSALERROR – One or more transfers failed when attempting to reverse a payment
  deriving (Eq, Show, Read)

$(deriveFromJSON defaultOptions { constructorTagModifier = map toUpper . drop 2 } ''PayStatus)
$(makePrisms ''PayStatus)