module Main where

import Data.Text (pack)
import Options.Applicative
import Types

data Options = Options
  { from :: Source,
    to :: Destination
  }
  deriving (Eq, Ord, Show)

longShort :: HasName f => String -> Mod f a
longShort t@(c : _) = long t <> short c
longShort t = long t

options :: Parser Options
options =
  Options
    <$> (sourceSpec <|> source)
    <*> (destinationSpec <|> destination)
  where
    sourceSpec =
      option
        (maybeReader (sourceFromText . pack))
        ( longShort "from"
            <> help "Source to migrate from in the form of 'FORGE:USER'"
        )
    source = Source <$> forge <*> fromUser
    forge =
      option
        (str >>= (pure . forgeFromText . pack))
        ( long "forge"
            <> help "Forge to migrate from"
        )
    fromUser =
      mkUser
        <$> strOption
          ( long "from-user"
              <> help "User account to migrate from"
          )
    destinationSpec =
      option
        (maybeReader (destinationFromText . pack))
        ( longShort "to"
            <> help "Destiation to migrate to in the form of 'GITEA_URL:USER'"
        )
    destination = Destination <$> gitea <*> toUser
    gitea =
      option
        (str >>= (pure . mkGitea . pack))
        ( longShort "gitea-url"
            <> help "URL of the Gitea instance to migrate to"
        )
    toUser =
      mkUser
        <$> strOption
          ( long "to-user"
              <> help "User account to migrate to"
          )

main :: IO ()
main = do
  args <- execParser parser
  print args
  where
    parser =
      info
        (options <**> helper)
        ( fullDesc
            <> progDesc "migrate-to-gitea solves the problem wherein you have just spun up a new self-hosted https://gitea.io instance, and now you want to move your project history there (or perhaps to one of the more well known public instances)."
            <> header "migrate-to-gitea - cli tool to migrate from git{hub,lab} to a gitea instance"
        )