import           Control.Monad
import           Data.List
import           System.Exit


import           XMonad
import           XMonad.Config.Desktop

-- Utilities
import           XMonad.Util.EZConfig        (additionalKeysP, additionalKeys)
import           XMonad.Util.SpawnOnce
import           XMonad.Util.Dmenu

-- Layouts
import           XMonad.Layout.NoBorders
import           XMonad.Layout.Spacing

-- Hooks
import           XMonad.Hooks.InsertPosition

-- xmonad :: XConfig -> IO ()
-- https://hackage.haskell.org/package/xmonad-0.15/docs/XMonad-Core.html#t:XConfig
main = xmonad $ desktopConfig
        { normalBorderColor  = "#1c1c1c"
        , focusedBorderColor = "#8a8a8a"
        , terminal           = "st"
        , layoutHook         = myLayouts
        , manageHook         = myManageHook
        , modMask            = mod4Mask       -- mod key to super
        , borderWidth        = 2
        , focusFollowsMouse  = False          -- don't change window based on mouse position (need to click)
        , workspaces         = ["code", "compile", "web"] ++ map show [4..9]
        } `additionalKeysP` myKeys


myLayouts = mySpacing 4 $ tiledVerticalBigMaster          -- bigger master for code and smaller slave for compiling
                          ||| Mirror tiledHorizontalEven  -- 50/50 horizontal split
                          ||| noBorders Full              -- disable borders for fullscreen layout
    where tiledVerticalBigMaster =  Tall 1 (3 / 100) (3 / 5)
          tiledHorizontalEven    =  Tall 1 (3 / 100) (1 / 2)
          mySpacing x            = spacingRaw True (Border x x x x) False (Border x x x x) True

myManageHook = insertPosition End Newer  -- insert new window at the end of the current layout

myKeys = [ ("<XF86AudioLowerVolume>",  spawn "pulseaudio-ctl down")
         , ("<XF86AudioRaiseVolume>",  spawn "pulseaudio-ctl up")
         , ("<XF86AudioMute>",         spawn "pulseaudio-ctl mute")
         , ("M-<F11>",                 spawn "pulseaudio-ctl down")
         , ("M-<F12>",                 spawn "pulseaudio-ctl up")

         , ("<XF86MonBrightnessUp>",   spawn "~/bin/backlight-ctl up")
         , ("<XF86MonBrightnessDown>", spawn "~/bin/backlight-ctl down")
         , ("<XF86ScreenSaver>",       spawn "slock")
         , ("<XF86TouchpadToggle>",    spawn "~/bin/touchpad-toggle")

         , ("M-o",                     spawn "~/bin/project-open")
         , ("M-m",                     spawn "st -e mocp")
         , ("M-S-d",                   spawn "notify-send -i x-office-calendar \"$(date +\"%H:%M %A %d/%m/%Y %B\")\"")
         , ("M-S-b",                   spawn "notify-send \"battery: $(cat /sys/class/power_supply/BAT0/capacity)\"")
         , ("M-q",                     spawn "notify-send 'Restarting xmonad'" >> spawn restartCmd)
         , ("M-S-q",                   confirm "Are you sure you want to shutdown?" $ io (exitWith ExitSuccess))
         ]

confirm :: String -> X () -> X ()
confirm prompt f = do
    result <- menuArgs "dmenu" ["-p", prompt] ["yes", "no"]
    when (result == "yes") f

restartCmd :: String
restartCmd = intercalate "; " [ "if type xmonad"
                              , "then xmonad --recompile && xmonad --restart"
                              , "else xmessage xmonad not in \\$PATH: \"$PATH\""
                              , "fi"
                              ]