import XMonad
import XMonad.Hooks.DynamicLog
import XMonad.Hooks.ManageDocks
import XMonad.Util.Run
import XMonad.Util.Loggers
import XMonad.Util.EZConfig(additionalKeys)
import System.IO
import System.Environment
import Data.Map (Map)
import qualified Data.Map as Map
import qualified XMonad.StackSet as W
import System.Exit
import Control.Monad.State (get)
import XMonad.Layout.Spiral
import Data.Ratio
import Data.List
import Data.Maybe (fromMaybe, listToMaybe, catMaybes)
import XMonad.Layout.Tabbed
import XMonad.Prompt
import XMonad.Util.Scratchpad
import Control.Monad (sequence, liftM, liftM2, join)
import XMonad.Util.WorkspaceCompare
import XMonad.Layout.NoBorders
import XMonad.Layout.PerWorkspace
import XMonad.Layout.SimplestFloat
import XMonad.Layout.Renamed
import XMonad.Layout.Reflect
import XMonad.Layout.OnHost
import XMonad.Layout.Combo
import XMonad.Layout.TwoPane
import XMonad.Layout.LayoutBuilder
import XMonad.Layout.WindowNavigation
import System.Process
import System.Directory (removeFile)
import System.Posix.Files
import System.FilePath ((</>))
import Control.Concurrent
import System.Posix.Process (getProcessID)
import System.IO.Error
import System.IO
import XMonad.Hooks.ManageHelpers hiding (CW)
import XMonad.StackSet (RationalRect (..))
import Control.Monad (when, filterM)
import Graphics.X11.ExtraTypes.XF86
import XMonad.Util.Cursor
import XMonad.Actions.Warp
import XMonad.Util.SpawnOnce
import System.Directory
import System.FilePath

import XMonad.Layout.IM

import XMonad.Prompt.MyShell
import XMonad.Prompt.MySsh

import Network.HostName

import Control.Applicative ((<$>))

type KeyMap = Map (ButtonMask, KeySym) (X ())

data Host = Host
            { hName :: HostName
            , hManageHook :: ManageHook
            , hWsp :: Integer -> WorkspaceId
            , hCoWsp :: String -> Maybe WorkspaceId
            , hKeysMod :: XConfig Layout -> (KeyMap -> KeyMap)
            , hScreens :: [ScreenId]
            }

defaultHost = Host { hName = "unkown"
                   , hManageHook = composeOne [manageScratchTerm]
                   , hWsp = show
                   , hCoWsp = const Nothing
                   , hKeysMod = const id
                   , hScreens = [0,1..]
                   }

hostFromName :: HostName -> Host
hostFromName h@("vali") = defaultHost { hName = h
                                      , hManageHook = composeOne $ catMaybes [ Just manageScratchTerm
                                                                             , assign "web"  $ className =? ".dwb-wrapped"
                                                                             , assign "web"  $ className =? "Chromium"
                                                                             , assign "work" $ className =? "Emacs"
                                                                             , assign "media" $ className =? "mpv"
                                                                             ]
                                      , hWsp = hWsp
                                      , hCoWsp = hCoWsp
                                      , hKeysMod = \conf -> Map.union $ Map.fromList $ join $ map (spawnBindings conf) [ (xK_d, ["chromium", "chromium $(xclip -o)"])
                                                                                                                       , (xK_e, ["emacsclient -c"])
                                                                                                                       ]
                                      , hScreens = [1, 0] ++ [2,3..]
                                      }
  where
    workspaceNames = Map.fromList [ (2, "web")
                                  , (3, "work")
                                  , (10, "media")
                                  ]
    hWsp = wspFromMap workspaceNames
    hCoWsp = coWspFromMap workspaceNames
    assign wsp test = (\wsp -> test -?> doShift wsp) <$> hCoWsp wsp
hostFromName _ = defaultHost

wspFromMap workspaceNames = \i -> case Map.lookup i workspaceNames of
  Just str -> show i ++ " " ++ str
  Nothing -> show i

coWspFromMap workspaceNames = \str -> case filter ((== str) . snd) $ Map.toList workspaceNames of
  [] -> Nothing
  [(i, _)] -> Just $ wspFromMap workspaceNames i
  _ -> Nothing

spawnModifiers = [0, controlMask, shiftMask .|. controlMask]
spawnBindings conf (k, cmds) = zipWith (\m cmd -> ((modm .|. mod1Mask .|. m, k), spawn cmd)) spawnModifiers cmds
  where
    modm = XMonad.modMask conf

manageScratchTerm = (resource =? "scratchpad" <||> resource =? "keysetup") -?> doRectFloat $ RationalRect (1 % 16) (1 % 16) (7 % 8) (7 % 8)

tabbedLayout t = renamed [Replace "Tabbed"] $ reflectHoriz $ t CustomShrink $ tabbedTheme
tabbedTheme = defaultTheme { activeColor = "black"
                           , inactiveColor = "black"
                           , urgentColor = "black"
                           , activeBorderColor = "white"
                           , inactiveBorderColor = "#202020"
                           , urgentBorderColor = "#bb0000"
                           , activeTextColor = "white"
                           , inactiveTextColor = "white"
                           , urgentTextColor = "white"
                           , decoHeight = 16
                           }

main = do
  xmobarProc <- spawnPipe "xmobar"
  hostname <- getHostName
  let
    host = hostFromName hostname
  setEnv "HOST" hostname
  let myConfig = defaultConfig {
        manageHook = manageDocks <+> hManageHook host
        , terminal = "urxvtc"
        , layoutHook = smartBorders $ avoidStruts $ windowNavigation layout'
        , logHook = dynamicLogWithPP xmobarPP'
        , modMask = mod4Mask
        , keys = \conf -> hKeysMod host conf $ myKeys' conf host
        , workspaces = take (length numKeys) $ map wsp [1..]
        , startupHook = assimilateKeychain >> (sequence autostart) >> (setDefaultCursor xC_left_ptr) >> banishScreen LowerRight >> return ()
        , normalBorderColor = "#202020"
        , focusedBorderColor = "white"
        }
      wsp = hWsp host
      -- We can´t define per-host layout modifiers because we lack dependent types
      layout' = onHost "skadhi" ( onWorkspace (wsp 1) (noBorders Full ||| withIM (1%5) (Title "Buddy List") tabbedLayout') $
                                  onWorkspace (wsp 10) (noBorders Full) $
                                  onWorkspace (wsp 2) (noBorders Full ||| tabbedLayout') $ 
                                  onWorkspace (wsp 5) tabbedLayout' $
                                  onWorkspace (wsp 8) (withIM (1%5) (Title "Friends") tabbedLayout') $
                                  defaultLayouts
                                ) $
                onHost "vali"   ( onWorkspace (wsp 2) (noBorders Full ||| tabbedLayout' ||| combineTwo (TwoPane 0.01 0.57) Full tabbedLayout') $
                                  onWorkspace (wsp 3) workLayouts $ 
                                  defaultLayouts
                                ) $
                defaultLayouts
      tabbedLayout' = tabbedLayout tabbedBottomAlways
      defaultLayouts = spiralWithDir East CW (1 % 2) ||| tabbedLayout' ||| noBorders Full
      workLayouts = spiralWithDir East CW (1 % 2)
                    ||| combineTwo (TwoPane 0.1 0.65) Full (
        tabbedLayout'
        ||| (layoutN 1 (SubBox (Abs 0) (Abs 0) (Rel 1) (Rel $ 2 % 3)) Nothing Full $ layoutAll (SubBox (Rel 0) (Rel $ 2 % 3) (Rel 1) (Rel 1)) tabbedLayout')
        )
      sqrtTwo = approxRational (sqrt 2) (1 / 2560)
      xmobarPP' = xmobarPP { ppOutput = hPutStrLn xmobarProc
                           , ppTitle = shorten 50
                           , ppSort = (liftM2 (.)) getSortByIndex $ return scratchpadFilterOutWorkspace
                           , ppUrgent = wrap "(" ")" . xmobarColor "red" ""
                           , ppHiddenNoWindows = xmobarColor "#202020" "" . wrap "(" ")"
                           , ppVisible = wrap "(" ")" . xmobarColor "yellow" ""
                           , ppCurrent = wrap "(" ")" . xmobarColor "green" ""
                           , ppHidden = wrap "(" ")"
                           , ppWsSep = " "
                           , ppSep = " | "
                           }
  xmonad $ myConfig
  
autostart = [ spawnKeychain
            , spawnOnce "urxvtd -o"
            ]

spawnKeychain = do
  home <- liftIO getHomeDirectory
  let keys = map ((home </>) . ("/.ssh/id_" ++)) ["ed25519", "ecdsa", "rsa"]
  keys' <- filterM (liftIO . doesFileExist) keys
  safeSpawn "urxvt" $ ["-title", "keysetup", "-e", "keychain"] ++ keys'

assimilateKeychain :: X ()
assimilateKeychain = liftIO $ assimilateKeychain' >> return ()
assimilateKeychain' = tryIOError $ do
  -- pid <- getProcessID
  -- tmpDir <- lookupEnv "TMPDIR"
  -- let tmpDir' = fromMaybe "/tmp" tmpDir
  --     tmpFile = tmpDir' </> "xmonad-keychain" ++ (show pid) ++ ".env"
  env <- runProcessWithInput "sh" ["-c", "eval $(keychain --eval --noask); env"] "" -- > " ++ tmpFile] ""
  -- env <- readFile tmpFile
  let envVars = Map.fromList $ map (\(k, v) -> (k, tail' v)) $ map (span (/= '=')) $ envLines
      envVars' = Map.filterWithKey (\k _ -> k `elem` transfer) envVars
      transfer = ["SSH_AUTH_SOCK", "SSH_AGENT_PID", "GPG_AGENT_INFO"]
      envLines = filter (elem '=') $ lines env :: [String]
  sequence $ map (\(k, c) -> setEnv k c) $ Map.toList envVars'
  -- removeFile tmpFile
  where
    tail' [] = []
    tail' (x:xs) = xs


numKeys = [xK_parenleft, xK_parenright, xK_braceright, xK_plus, xK_braceleft, xK_bracketright, xK_bracketleft, xK_exclam, xK_equal, xK_asterisk]

instance Shrinker CustomShrink where
  shrinkIt _ "" = [""]
  shrinkIt s cs = cs : shrinkIt s ((reverse . drop 4 . reverse $ cs) ++ "...")

xPConfig = defaultXPConfig { bgColor = "black"
                           , fgColor = "white"
                           , fgHLight = "green"
                           , bgHLight = "black"
                           , borderColor = "white"
                           }

sshOverrides = map (\h -> mkOverride { oHost = h, oCommand = moshCmd . inTmux } )
               [
                 "odin", "odin.asgard.yggdrasil"
               , "surtr", "yggdrasil.li", "surtr.yggdrasil.li", "praseodym.org", "surtr.praseodym.org", "surtr.141.li", "141.li"
               , "vindler", "vindler.alfheim.yggdrasil"
               , "ullr"
               ]
               ++
               map (\h -> mkOverride { oHost = h, oCommand = moshCmd' "/run/current-system/sw/bin/mosh-server" . withEnv [("TERM", "xterm")] . inTmux} )
               [ "bragi", "bragi.asgard.yggdrasil"
               ]
               ++
               map (\h -> mkOverride { oHost = h, oCommand = sshCmd . withEnv [("TERM", "xterm")] . inTmux } )
               [ "galois", "galois.praseodym.org"
               ]

myKeys' conf host = Map.fromList $
    -- launch a terminal
    [ ((modm,               xK_Return), spawn $ (XMonad.terminal conf) ++ " -e tmux")
    , ((modm .|. controlMask, xK_Return), scratchpadSpawnActionCustom $ (XMonad.terminal conf) ++ " -name scratchpad -title scratchpad -e tmux")
 
    -- launch dmenu
    --, ((modm,               xK_d     ), spawn "exe=`dmenu_path | dmenu` && eval \"exec $exe\"")
    , ((modm,               xK_d     ), shellPrompt "Run: " xPConfig)
    , ((modm .|. shiftMask, xK_d     ), prompt "Run in Terminal: " ("urxvtc" ++ " -e") xPConfig)
    , ((modm,               xK_at    ), sshPrompt sshOverrides xPConfig)

    -- close focused window
    , ((modm .|. shiftMask, xK_q     ), kill)
 
     -- Rotate through the available layout algorithms
    , ((modm,               xK_space ), sendMessage NextLayout)
 
    --  Reset the layouts on the current workspace to default
    , ((modm ,              xK_r     ), (setLayout $ XMonad.layoutHook conf) >> refresh)
 
    -- Resize viewed windows to the correct size
    -- , ((modm,               xK_r     ), refresh)

    -- Move focus to the next window
    , ((modm,               xK_t     ), windows W.focusDown)
 
    -- Move focus to the previous window
    , ((modm,               xK_n     ), windows W.focusUp  )
 
    -- Move focus to the master window
    , ((modm,               xK_m     ), windows W.focusMaster  )
 
    -- Swap the focused window and the master window
    , ((modm .|. shiftMask, xK_m     ), windows W.swapMaster)
 
    -- Swap the focused window with the next window
    , ((modm .|. shiftMask, xK_t     ), windows W.swapDown  )
 
    -- Swap the focused window with the previous window
    , ((modm .|. shiftMask, xK_n     ), windows W.swapUp    )

    , ((modm,                 xK_Right), sendMessage $ Go R)
    , ((modm,                 xK_Left ), sendMessage $ Go L)
    , ((modm,                 xK_Up   ), sendMessage $ Go U)
    , ((modm,                 xK_Down ), sendMessage $ Go D)
    , ((modm .|. shiftMask  , xK_Right), sendMessage $ Move R)
    , ((modm .|. shiftMask  , xK_Left ), sendMessage $ Move L)
    , ((modm .|. shiftMask  , xK_Up   ), sendMessage $ Move U)
    , ((modm .|. shiftMask  , xK_Down ), sendMessage $ Move D)
     -- Shrink the master area
    , ((modm,               xK_h     ), sendMessage Shrink)
 
    -- Expand the master area
    , ((modm,               xK_s     ), sendMessage Expand)
 
    -- Push window back into tiling
    , ((modm .|. shiftMask, xK_space ), withFocused $ windows . W.sink)
 
    -- Increment the number of windows in the master area
    , ((modm              , xK_comma ), sendMessage (IncMasterN 1))
 
    -- Deincrement the number of windows in the master area
    , ((modm              , xK_period), sendMessage (IncMasterN (-1)))

    , ((0, xF86XK_AudioRaiseVolume), safeSpawn "amixer" ["sset", "Master", "Playback", "5+"])
    , ((0, xF86XK_AudioLowerVolume), safeSpawn "amixer" ["sset", "Master", "Playback", "5-"])
 
    -- Toggle the status bar gap
    -- Use this binding with avoidStruts from Hooks.ManageDocks.
    -- See also the statusBar function from Hooks.DynamicLog.
    --
    , ((modm              , xK_b     ), sendMessage ToggleStruts)
 
    -- Quit xmonad
    , ((modm .|. shiftMask, xK_e     ), io (exitWith ExitSuccess))
 
    -- Restart xmonad
    , ((modm .|. shiftMask, xK_r     ), whenX (recompile True) $ safeSpawn "xmonad" ["--restart"])
    , ((modm .|. shiftMask, xK_l     ), safeSpawn "slock" [])
    ]
    ++
 
    --
    -- mod-[1..9], Switch to workspace N
    --
    -- mod-[1..9], Switch to workspace N
    -- mod-shift-[1..9], Move client to workspace N
    --
    [((m .|. modm, k), windows $ f i)
    | (i, k) <- zip (XMonad.workspaces conf) $ numKeys
    , (f, m) <- [(W.view, 0), (W.shift, shiftMask)]
    ]
    ++
    [((m .|. modm .|. controlMask, k), screenWorkspace i >>= (flip whenJust) (windows . f))
    | (i, k) <- zip (hScreens host) [xK_g, xK_c, xK_r, xK_l]
    , (f, m) <- [(W.view, 0), (W.shift, shiftMask)]
    ]
  where
    modm = XMonad.modMask conf