{-# LANGUAGE LambdaCase #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE RecordWildCards #-}
{-# LANGUAGE NoImplicitPrelude #-}

module Biz.Cli
  ( Plan (..),
    main,
    Docopt.Docopt (..),
    Docopt.Arguments,
    Docopt.argument,
    Docopt.docopt,
    Docopt.getAllArgs,
    Docopt.getArg,
    Docopt.getArgWithDefault,
    Docopt.longOption,
    Docopt.shortOption,
    Docopt.command,
    has,
  )
where

import Alpha
import qualified Biz.Test as Test
import qualified System.Console.Docopt as Docopt
import qualified System.Environment as Environment

data Plan cfg = Plan
  { help :: Docopt.Docopt,
    move :: Docopt.Arguments -> IO (),
    test :: Test.Tree,
    tidy :: cfg -> IO ()
  }

main :: Plan cfg -> IO ()
main Plan {..} =
  Environment.getArgs
    /> Docopt.parseArgs help
    +> \case
      Left err -> panic <| show err
      Right args ->
        if args `has` Docopt.command "test"
          then Test.run test
          else
            if args `has` Docopt.longOption "help" || args `has` Docopt.shortOption 'h'
              then Docopt.exitWithUsage help
              else move args

has :: Docopt.Arguments -> Docopt.Option -> Bool
has = Docopt.isPresent