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-- | CLI interface to the CStructs2Copilot subcommand
module CLI.CommandFretReqsDB2Copilot
    (
      -- * Direct command access
      command
    , CommandOpts
    , ErrorCode

      -- * CLI
    , commandDesc
    , commandOptsParser
    )
  where

-- External imports
import Options.Applicative ( Parser, help, long, metavar, showDefault,
                             strOption, switch, value )

-- External imports: command results
import Command.Result ( Result )

-- External imports: actions or commands supported
import Command.FRETReqsDB2Copilot ( ErrorCode, FRETReqsDB2CopilotOptions (..),
                                    fretReqsDB2Copilot )

-- * Command

-- | Options to generate Copilot from FRET Requirements Databases.
data CommandOpts = CommandOpts
  { fretReqsDBFileName :: FilePath
  , fretReqsDBCoCoSpec :: Bool
  , fretReqsDBTarget   :: String
  }

-- | Transform a FRET requirements database containing a temporal logic
-- specification into a Copilot specification.
--
-- This is just an uncurried version of "Command.FRETReqsDB2Copilot".
command :: CommandOpts -> IO (Result ErrorCode)
command c =
    fretReqsDB2Copilot
      (fretReqsDBFileName c)
      internalCommandOpts

  where

    internalCommandOpts :: FRETReqsDB2CopilotOptions
    internalCommandOpts = FRETReqsDB2CopilotOptions
      { fretReqsDB2CopilotUseCoCoSpec = fretReqsDBCoCoSpec c
      , fretReqsDB2CopilotFilename    = fretReqsDBTarget   c
      }

-- * CLI

-- | Command description for CLI help.
commandDesc :: String
commandDesc =
  "Generate a Copilot file from a FRET Requirements Database"

-- | Subparser for the @fret-reqs-db@ command, used to generate a Copilot
-- specification from a FRET file containing requirements only.
commandOptsParser :: Parser CommandOpts
commandOptsParser = CommandOpts
  <$> strOption
        (  long "fret-file-name"
        <> metavar "FILENAME"
        <> help strFretArgDesc
        )
  <*> switch
        (  long "cocospec"
        <> help strFretCoCoDesc
        )
  <*> strOption
        (  long "target-file-name"
        <> metavar "FILENAME"
        <> help strFretTargetDesc
        <> showDefault
        <> value "fret"
        )

-- | Argument FRET command description
strFretArgDesc :: String
strFretArgDesc = "FRET file with requirements."

-- | CoCoSpec flag description
strFretCoCoDesc :: String
strFretCoCoDesc = "Use CoCoSpec variant of TL properties"

-- | Target file name flag description.
strFretTargetDesc :: String
strFretTargetDesc = "Filename prefix for monitoring files in target language"