module Main (main) where

import System.IO
import System.Directory

import Configure.Write (write)

main = do
  putStrLn "Manual.hs revision #01, 08 Jun 2011"
  putStrLn ""

  x1 <- doesDirectoryExist "Include"
  if x1 then return () else createDirectory "Include"
  x2 <- doesFileExist "Include/Platform.h"
  if x2 then msg2 else msg1

msg1 = do
  putStrLn "This program allows you to manually specify the build platform"
  putStrLn "values that will be returned from the System.Platform module."
  putStrLn "Usually the configure script will auto-detect these; by specifying"
  putStrLn "these values manually, you will disable auto-detection. Are you"
  putStrLn "sure you want to do that?"
  yes_no prompt_OS (putStrLn "Exit.")

msg2 = do
  putStrLn "This program allows you to manually specify the build platform"
  putStrLn "values that will be returned from the System.Platform module."
  putStrLn "The data in question has already been set; if you proceed, this"
  putStrLn "data will be overwritten. Are you sure you want to do that?"
  yes_no prompt_OS (putStrLn "Exit.")

yes_no yes no = do
  putStr   "(Y/N)? "
  hFlush stdout
  l <- getLine
  case l of
    ('y':_) -> yes
    ('Y':_) -> yes
    _       -> no

prompt_OS = do
  putStrLn ""
  putStrLn "Select OS type:"
  putStrLn "1 = Unix"
  putStrLn "2 = Microsoft Windows"
  putStr   "(1/2)? "
  l <- getLine
  case l of
    "1" -> prompt_CName ("Unix")
    "2" -> prompt_CName ("MS_Windows")
    _   -> do
      putStrLn "Invalid response."
      prompt_OS

prompt_CName os = do
  putStrLn ""
  putStrLn "Enter compiler name string (e.g., \"GHC\", \"JHC\", etc.)"
  putStrLn "Your text will be used verbatim."
  putStr   "Name> "
  cname <- getLine
  prompt_CVer os cname

prompt_CVer os cname = do
  putStrLn ""
  putStrLn "Enter compiler version string (e.g., \"6.6\", \"7.0.2\", etc.)"
  putStrLn "Your text will be used verbatim."
  putStrLn "Version> "
  cver <- getLine
  putStrLn ""
  write (os, cname, cver)