{-# LANGUAGE ApplicativeDo       #-}
{-# LANGUAGE ScopedTypeVariables #-}

module Main where

import           Data.Version               (showVersion)
import           Options.Applicative.Simple (Parser, help, long, metavar, simpleOptions,
                                             strOption, switch, value)
import           Paths_orgstat              (version)
import           System.Directory           (getHomeDirectory)
import           System.FilePath            ((</>))
import           System.Wlog                (Severity (..), consoleOutB, lcTermSeverity,
                                             logDebug, logError, setupLogging)
import           Universum

import           OrgStat.CLI                (CommonArgs, parseCommonArgs)
import           OrgStat.IO                 (readConfig)
import           OrgStat.Logic              (runOrgStat)
import           OrgStat.WorkMonad          (WorkConfig (..), runWorkM)

data Args = Args
    { configPath :: !FilePath
      -- ^ Path to configuration file.
    , debug      :: !Bool
      -- ^ Enable debug logging.
    , commonArgs :: CommonArgs
      -- ^ Other arguments.
    } deriving Show

argsParser :: FilePath -> Parser Args
argsParser homeDir = do
    configPath <-
        strOption
            (long "conf-path" <> metavar "FILEPATH" <> value (homeDir </> ".orgstat.yaml") <>
            help "Path to the configuration file")
    debug <- switch (long "debug" <> help "Enable debug logging")
    commonArgs <- parseCommonArgs
    pure Args {..}

getNodeOptions :: FilePath -> IO Args
getNodeOptions homeDir = do
    (res, ()) <-
        simpleOptions
            ("orgstat-" <> showVersion version)
            "----- OrgStat ------"
            "Statistic reports visualizer for org-mode"
            (argsParser homeDir)
            empty
    pure res

main :: IO ()
main = do
    args@Args{..} <- getNodeOptions =<< getHomeDirectory
    let sev = if debug then Debug else Info
    setupLogging Nothing $ consoleOutB & lcTermSeverity .~ Just sev
    config <- readConfig configPath
    runWorkM (WorkConfig config commonArgs) $ do
        logDebug $ "Just started with options: " <> show args
        runOrgStat `catch` topHandler
  where
    topHandler (e :: SomeException) = do
        logError $ "Top level error occured: " <> show e