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module Feldspar.Compiler.Frontend.CommandLine.API.Library where


import Data.Char (toUpper)
import System.Console.ANSI

upperFirst :: String -> String
upperFirst (first:rest) = toUpper first : rest
upperFirst s            = s

formatStringListCore :: [String] -> String
formatStringListCore []     = ""
formatStringListCore [x]    = x
formatStringListCore (x:xs) = x ++ " | " ++ formatStringListCore xs

formatStringList :: [String] -> String
formatStringList []   = error "formatStringList should not be called with an empty list."
formatStringList list = "(" ++ formatStringListCore list ++ ")"

rpad :: Int -> String -> String
rpad target = rpadWith target ' '

rpadWith :: Int -> Char -> String -> String
rpadWith target padchar s
    | length s >= target = s
    | otherwise = rpadWith target padchar (s ++ [padchar])

fancyWrite :: String -> IO ()
fancyWrite s = do
    withColor Blue $ putStr "=== [ "
    withColor Cyan $ putStr $ rpad 70 s
    withColor Blue $ putStrLn " ] ==="

withColor :: Color -> IO () -> IO ()
withColor color action = do
    setSGR [SetColor Foreground Vivid color, SetColor Background Dull Black] -- , SetConsoleIntensity BoldIntensity]
    action
    setSGR [Reset]
