module TeaCleaner.Filter
    ( FilterResult(..)
    , UserFilter(..)
    , filterByActivities
    , filterByUserProperties
    ) where

import qualified Data.Text as Text
import Data.Time (LocalTime(..), ZonedTime(..))
import Data.Time.Calendar.OrdinalDate (fromOrdinalDate)
import qualified Data.Vector as Vector
import TeaCleaner.Client (Activity(..), User(..), getActivities)
import TeaCleaner.Configuration (Settings(..))

data UserFilter
    = PassFilter
    | SuspiciousFilter
    | FailedFilter
    deriving (Eq, Show)

data FilterResult = FilterResult User UserFilter
    deriving (Show)

filterByUserProperties :: User -> FilterResult
filterByUserProperties user@User{ created, lastLogin, description, website }
    | zonedDay created == zonedDay lastLogin
    , zonedDay created > fromOrdinalDate 2024 1
    , zonedDay created < fromOrdinalDate 2025 17
    , not (Text.null description)
    , not (Text.null website) = FilterResult user SuspiciousFilter
    | otherwise = FilterResult user PassFilter
  where
    zonedDay = localDay . zonedTimeToLocalTime

filterByActivities :: Settings -> User -> IO FilterResult
filterByActivities settings user = getActivities settings user
    >>= evalActivities
  where
    evalActivities activities
        | Just (Activity{ opType }, rest) <- Vector.uncons activities
        , Vector.null rest
        , opType == "create_repo" = pure $ FilterResult user SuspiciousFilter
    evalActivities _ = pure $ FilterResult user PassFilter