module Model.Income
  ( list
  , create
  , editOwn
  , deleteOwn
  , modifiedDuring
  ) where

import Data.Time.Clock (UTCTime, getCurrentTime)
import Data.Time.Calendar (Day)

import Control.Monad.IO.Class (liftIO)

import Database.Persist

import Model.Database
import qualified Model.Json.Income as Json

list :: Persist [Json.Income]
list = map getJsonIncome <$> selectList [IncomeDeletedAt ==. Nothing] []

getJsonIncome :: Entity Income -> Json.Income
getJsonIncome incomeEntity =
  Json.Income (entityKey incomeEntity) (incomeUserId income) (incomeDate income) (incomeAmount income)
  where income = entityVal incomeEntity

create :: UserId -> Day -> Int -> Persist IncomeId
create userId date amount = do
  now <- liftIO getCurrentTime
  insert (Income userId date amount now Nothing Nothing)

editOwn :: UserId -> IncomeId -> Day -> Int -> Persist Bool
editOwn userId incomeId date amount = do
  mbIncome <- get incomeId
  case mbIncome of
    Just income ->
      if incomeUserId income == userId
        then do
          now <- liftIO getCurrentTime
          update incomeId
            [ IncomeEditedAt =. Just now
            , IncomeDate =. date
            , IncomeAmount =. amount
            ]
          return True
        else
          return False
    Nothing ->
      return False

deleteOwn :: Entity User -> IncomeId -> Persist Bool
deleteOwn user incomeId = do
  mbIncome <- get incomeId
  case mbIncome of
    Just income ->
      if incomeUserId income == entityKey user
        then do
          now <- liftIO getCurrentTime
          update incomeId [IncomeDeletedAt =. Just now]
          return True
        else
          return False
    Nothing ->
      return False

modifiedDuring :: UTCTime -> UTCTime -> Persist [Income]
modifiedDuring start end =
  map entityVal <$> selectList
    (   [IncomeCreatedAt >=. start, IncomeCreatedAt <. end]
    ||. [IncomeEditedAt >=. Just start, IncomeEditedAt <. Just end]
    ||. [IncomeDeletedAt >=. Just start, IncomeDeletedAt <. Just end]
    )
    []