module Stackctl.CLI
  ( App
  , optionsL
  , AppT
  , runAppT
  ) where

import Stackctl.Prelude

import qualified Blammo.Logging.LogSettings.Env as LoggingEnv
import Control.Monad.Catch (MonadCatch)
import Control.Monad.Trans.Resource (ResourceT, runResourceT)
import Stackctl.AWS
import Stackctl.AWS.Scope
import Stackctl.ColorOption
import Stackctl.DirectoryOption
import Stackctl.FilterOption
import Stackctl.VerboseOption

data App options = App
  { appLogger :: Logger
  , appOptions :: options
  , appAwsScope :: AwsScope
  , appAwsEnv :: AwsEnv
  }

optionsL :: Lens' (App options) options
optionsL = lens appOptions $ \x y -> x { appOptions = y }

instance HasLogger (App options) where
  loggerL = lens appLogger $ \x y -> x { appLogger = y }

instance HasAwsScope (App options) where
  awsScopeL = lens appAwsScope $ \x y -> x { appAwsScope = y }

instance HasAwsEnv (App options) where
  awsEnvL = lens appAwsEnv $ \x y -> x { appAwsEnv = y }

instance HasDirectoryOption options => HasDirectoryOption (App options) where
  directoryOptionL = optionsL . directoryOptionL

instance HasFilterOption options => HasFilterOption (App options) where
  filterOptionL = optionsL . filterOptionL

instance HasColorOption options => HasColorOption (App options) where
  colorOptionL = optionsL . colorOptionL

instance HasVerboseOption options => HasVerboseOption (App options) where
  verboseOptionL = optionsL . verboseOptionL

newtype AppT app m a = AppT
  { unAppT :: ReaderT app (LoggingT (ResourceT m)) a
  }
  deriving newtype
    ( Functor
    , Applicative
    , Monad
    , MonadIO
    , MonadUnliftIO
    , MonadResource
    , MonadReader app
    , MonadLogger
    , MonadThrow
    , MonadCatch
    , MonadMask
    )

runAppT
  :: ( MonadMask m
     , MonadUnliftIO m
     , HasColorOption options
     , HasVerboseOption options
     )
  => options
  -> AppT (App options) m a
  -> m a
runAppT options f = do
  envLogSettings <- liftIO LoggingEnv.parse

  logger <- newLogger $ adjustLogSettings
    (options ^. colorOptionL)
    (options ^. verboseOptionL)
    envLogSettings

  aws <- runLoggerLoggingT logger awsEnvDiscover

  let
    runAws
      :: MonadUnliftIO m => ReaderT AwsEnv (LoggingT (ResourceT m)) a -> m a
    runAws = runResourceT . runLoggerLoggingT logger . flip runReaderT aws

  app <- App logger options <$> runAws fetchAwsScope <*> pure aws

  let
    AwsScope {..} = appAwsScope app

    context =
      [ "region" .= awsRegion
      , "accountId" .= awsAccountId
      , "accountName" .= awsAccountName
      ]

  runResourceT
    $ runLoggerLoggingT app
    $ flip runReaderT app
    $ withThreadContext context
    $ unAppT f

adjustLogSettings :: LogColor -> Verbosity -> LogSettings -> LogSettings
adjustLogSettings lc v = setLogSettingsColor lc . verbositySetLogLevels v