{-# LANGUAGE TemplateHaskell #-}

module Hledger.Flow.Internals where

import GHC.Conc (getNumCapabilities, getNumProcessors)
import Development.GitRev
import Data.Version (Version, showVersion)
import Paths_hledger_flow (version)

import qualified Data.Text as T
import qualified System.Info as Sys

data SystemInfo = SystemInfo { os :: String
                             , arch :: String
                             , compilerName :: String
                             , compilerVersion :: Version
                             , cores :: Int
                             , availableCores :: Int
                             }
                deriving (Show)

versionInfo :: SystemInfo -> T.Text
versionInfo sysInfo = T.pack ("hledger-flow " ++ showVersion version ++ " " ++
                       os sysInfo ++ " " ++ arch sysInfo ++ " " ++
                       compilerName sysInfo ++ " " ++
                       showVersion (compilerVersion sysInfo) ++
                       " " ++ $(gitHash))

systemInfo :: IO SystemInfo
systemInfo = do
    processors <- getNumProcessors
    available <- getNumCapabilities
    return SystemInfo {
        os = Sys.os,
        arch = Sys.arch,
        compilerName = Sys.compilerName,
        compilerVersion = Sys.compilerVersion,
        cores = processors,
        availableCores = available
        }