module miTask

import StdDebug, StdMisc
from StdFunc import flip

import iTasks
import mTask

from Text import class Text(startsWith,concat,split,join), instance Text String

import qualified Data.Map as DM

from Data.Func import $
import Data.Tuple
import Data.List
import System.Directory

import iTasks.UI.Definition

import iTasks._Framework.TaskState
import iTasks._Framework.TaskServer
import iTasks._Framework.IWorld
import iTasks._Framework.Store


import TTY, iTasksTTY

derive class iTask Queue, TTYSettings, Parity, BaudRate, ByteSize
derive class iTask MTaskMSGRecv, MTaskMSGSend, SerTCP, UserLED

:: *Resource | TTYd !*TTY
:: Channels :== ([MTaskMSGRecv], [MTaskMSGSend], Bool)

:: SerTCP = SerialDevice | TCPDevice
:: MTaskDevice = {
		deviceTask :: Maybe TaskId,
		deviceConnected :: Maybe String,
		deviceName :: String,
		deviceTasks :: [(String, Int)]
	}
:: MTaskShare = {
		initValue :: Int,
		withTask :: String,
		identifier :: Int,
		realShare :: String
	}

Start :: *World -> *World
Start world = startEngine (mTaskManager
	>>* [OnAction (Action "Shutdown") (always $ shutDown)]) world

memoryShare :: String a -> Shared a | iTask a
memoryShare s d = sdsFocus s $ memoryStore "" $ Just d

deviceStore :: Shared [MTaskDevice]
deviceStore = memoryShare "mTaskDevices" []

sdsStore :: Shared [MTaskShare]
sdsStore = memoryShare "mTaskShares" []

bcStateStore :: Shared BCState
bcStateStore = memoryShare "mTaskBCState" zero

mTaskTaskStore :: Shared [String]
mTaskTaskStore = memoryShare "mTaskTasks" ["ledder", "ledon", "ledoff"]

mTaskMap :: Map String (Main (ByteCode () Stmt))
mTaskMap = 'DM'.fromList [("ledder", bc), ("ledon", bc2 LED1), ("ledoff", bc3 LED3)]

bc :: Main (ByteCode () Stmt)
bc = sds \x=1 In sds \pinnetje=1 In {main =
		IF (digitalRead D3) (
			x =. x +. lit 1 :.
			pub x
		) (
			noOp
		) :.
		IF (pinnetje ==. lit 1) (
			ledOn LED1
		) (
			IF (pinnetje ==. lit 2) (
				ledOn LED2
			) (
				ledOn LED3
			)
		)}

bc2 :: UserLED -> Main (ByteCode () Stmt)
bc2 d = {main = ledOn d}

bc3 :: UserLED -> Main (ByteCode () Stmt)
bc3 d = {main = ledOff d}

:: MTaskDeviceStatus = {connected :: Bool, name :: String, tasks :: [(String, Int)]}
derive class iTask MTaskDeviceStatus, MTaskDevice, MTaskShare, BCState

mTaskManager :: Task ()
mTaskManager = anyTask 
		[ viewmTasks @! ()
		, viewShares
		, whileUnchanged deviceStore viewDevices
		] <<@ ApplyLayout layout
	where
		layout = sequenceLayouts
			[ arrangeWithSideBar 0 LeftSide 260 True
			, arrangeSplit Vertical True
			]

		viewmTasks = listmTasks
			>&^ \sh->whileUnchanged sh $ \mi->case mi of
				Nothing = viewInformation "No task selected" [] ()
				Just mTaskTask = get deviceStore
					>>= \devices->case devices of
						[] = viewInformation "No devices yet" [] ()
						ds = sendmTask mTaskTask ds @! ()
			where
				listmTasks :: Task String
				listmTasks = enterChoiceWithShared "Available mTasks" [ChooseFromList id] mTaskTaskStore

				sendmTask mTaskId ds = 
						(enterChoice "Choose Device" [ChooseFromDropdown \t->t.deviceName] ds
						-&&- enterInformation "Timeout, 0 for one-shot" [])
					>>* [OnAction (Action "Send") (withValue $ Just o sendToDevice mTaskId)]

				sendToDevice :: String (MTaskDevice, Int) -> Task ()
				sendToDevice mTask (device, timeout) =
						get bcStateStore @ createBytecode
					>>= \(msgs, st1)->set st1 bcStateStore @ toSDSRecords
					>>= \sdss->upd ((++)sdss) sdsStore//MTaskShareaddToSDSShare
					>>| makeShares sdss
					>>| upd (\(r,s,ss)->(r,s++msgs,ss)) (channels device)
					@! ()
					where
						createBytecode st = toMessages timeout $ toRealByteCode (unMain $ fromJust ('DM'.get mTask mTaskMap)) st
						sharename i = fromJust (device.deviceConnected) +++ "-" +++ toString i
						toSDSRecords st = [{MTaskShare |
							initValue=toInt d1*265 + toInt d2,
							withTask=mTask,
							identifier=i,
							realShare="mTaskSDS-" +++ toString i}
								\\(i,[d1,d2])<-st.sdss]
						makeShares = foldr (\sh t->set sh.initValue (getSDSStore sh) >>| t) (treturn ())
					
		getSDSStore :: MTaskShare -> Shared Int
		getSDSStore sh = memoryShare sh.realShare 0
					
		channels :: MTaskDevice -> Shared Channels
		channels d = memoryShare (fromJust d.deviceConnected) ([], [], False)

		viewShares :: Task ()
		viewShares = forever $ viewSharedInformation "Shares" [] sdsStore @! ()
//				enterChoiceWithShared "Shares" [ChooseFromList id] sdsStore
//			>>* [OnValue $ withValue $ Just o updateShare]
//			>>* [OnAction (Action "Back") (const $ Just $ treturn ())]
//			where
//				sdsvw (k, v) = concat ["SDS ", toString k, ": ", toString v]
//				updateShare s = viewInformation "" [] ()
//				updateShare (k, v) = (viewInformation "Key" [] k
//					||- updateInformation "Value" [] v)
					

		viewDevices :: [MTaskDevice] -> Task ()
		viewDevices ds = anyTask [
				addDevice deviceStore <<@ Title "Add new device" @! ():
					[viewDevice d <<@ Title d.deviceName\\d<-ds]]
			<<@ ArrangeWithTabs @! ()
		
		viewDevice :: MTaskDevice -> Task ()
		viewDevice d = (viewInformation "Device settings" [] d 
				||- (case d.deviceConnected of
					Just s = viewSharedInformation "Channels" [ViewAs dropEmpty] (channels d) @! ()
					Nothing = viewInformation "No channels yet" [] "" @! ()
				)) <<@ ArrangeHorizontal
			where
				dropEmpty (r,s,ss) = (filter ((=!=)MTEmpty) r,s,ss)

		addDevice :: (Shared [MTaskDevice]) -> Task SerTCP
		addDevice devices = enterInformation "Device type" []
			>&^ \sh->whileUnchanged sh $ \mty->case mty of
				Nothing = viewInformation "No type selected yet" [] "" @! ()
				Just ty = case ty of
					TCPDevice = (enterInformation "Name" [] -&&- enterInformation "Hostname" [] -&&- enterInformation "Port" [])
						>>= \(name, (host, port))->cont name (syncNetworkChannel host port)
					SerialDevice = accWorld getTTYDevices
						>>= \dl->(enterInformation "Name" [] -&&- enterChoice "Device" [] dl -&&- updateInformation "Settings" [] zero)
						>>= \(name, (dev, set))->cont name (syncSerialChannel dev set)
			where
				cont :: String ((Shared Channels) -> Task ()) -> Task ()
				cont name synfun = get randomInt 
					@ (\randint->{deviceConnected=Just (name +++ toString randint), deviceName=name, deviceTasks=[], deviceTask=Nothing})
					>>= \dev->appendTopLevelTask 'DM'.newMap True (synfun $ channels dev)
					>>= \tid->upd (\l->[{dev & deviceTask=Just tid}:l]) devices
					@! ()
						
//				>= \ty->get randomInt @ (\randint->{deviceConnected=Just (name +++ toString randint), deviceName=name, deviceTasks=[]})
//			>>= \dev->let ch = channels dev in case ty of
//				TCPDevice = enterInformation "Hostname and port" []
//					>>= \(host, port)->cont dev ||- syncNetworkChannel host port ch
//				SerialDevice = accWorld getDevices
//					>>= \dl->(enterChoice "Device" [] dl -&&- updateInformation "Settings" [] zero)
//					>>= \(device, settings)->cont dev ||- syncSerialChannel device settings ch
//			where
//				cont d = (upd (\l->[d:l]) devices >>| addDevice devices)

//		connectDevice :: [MTaskDevice] -> Task ()
//		connectDevice [] = treturn ()
//		connectDevice [d:ds] = (case d.deviceConnected of
//			(Just sh) = viewSharedInformation "Buffers" [] sh @! ()
//			Nothing = viewInformation ("Connect " +++ d.deviceName) [] "" >>* [
//				OnAction (Action "connect") (const $ Just $ connect d)]
//			) -|| connectDevice ds

		deviceviewer :: [MTaskDevice] -> [MTaskDeviceStatus]
		deviceviewer ds = [{MTaskDeviceStatus | name = d.deviceName,
			connected = if (isNothing d.deviceConnected) False True,
			tasks = d.deviceTasks}\\d<-ds]
	
//		showTabbed :: [MTaskDevice] -> Task ()
//		showTabbed [] = viewInformation "" [] "No devices yet" @! ()
//		showTabbed [l:ls] = foldr (\e es->manageDevice e ||- es) (manageDevice l) ls
//
//		manageDevice :: MTaskDevice -> Task ()
//		manageDevice md = 
//				either viewTCP viewSer md.deviceSettings
//			||- maybe
//				(treturn () >>* [OnAction (Action "Connect") (always shutDown)] @! ())
//				(\b->viewSharedInformation "Buffers" [] b @! ())
//				md.deviceConnected
//			<<@ ArrangeVertical

		mapPar :: (a -> Task a) [a] -> Task ()
		mapPar f l = foldr1 (\x y->f x ||- y) l <<@ ArrangeWithTabs @! ()
		allAtOnce t = foldr1 (||-) t @! ()
		//allAtOnce = (flip (@!) ()) o foldr1 (||-)


//mTaskTask :: Task ()
//mTaskTask = let (msgs, sdsShares) = makeMsgs 1000 bc in
//	withDevice \ch->
//			sendMsg msgs ch
//		||- processMessages ch messageShare sdsShares
//		||- forever (enterChoice "Choose led to enable" [] [LED1, LED2, LED3]
//				>>= \p->sendMsg (fst (makeMsgs 0 (bc2 p))) ch)
//		||- forever (enterChoice "Choose led to disable" [] [LED1, LED2, LED3]
//				>>= \p->sendMsg (fst (makeMsgs 0 (bc3 p))) ch)
//		||- viewSharedInformation "channels" [ViewAs lens] ch
//		||- viewSharedInformation "messages" [] messageShare
//		||- viewSh sdsShares ch
//		>>* [OnAction ActionFinish (always shutDown)]
//	where
//		messageShare :: Shared [String]
//		messageShare = sharedStore "mTaskMessagesRecv" []
//
//		makeMsgs :: Int (Main (ByteCode () Stmt)) -> ([MTaskMSGSend], [(Int, Shared Int)])
//		makeMsgs timeout bc
//		# (msgs, st) = toMessages timeout (toRealByteCode (unMain bc))
//		= (msgs, map f st.sdss)
//			where 
//				f (i,d) = (i, sharedStore ("mTaskSDS-" +++ toString i) (dd d))
//				dd [x,y] = toInt x*265 + toInt y
//
//		updateSDSs :: [(Int, Shared Int)] (Shared [String]) MTaskMSGRecv -> Task ()
//		updateSDSs [(id, sh):xs] m n=:(MTPub i d)
//		| id == i = set ((toInt d.[0])*265 + toInt d.[1]) sh @! ()
//		= updateSDSs xs m n
//		updateSDSs _ m mtm = case mtm of
//			MTMessage s = upd (\l->take 5 [s:l]) m @! ()
//			mta=:(MTTaskAck _) = upd (\l->take 5 [toString mta:l]) m @! ()
//			//TODO other recv msgs
//			_ = return ()
//
//		lens :: ([MTaskMSGRecv], [MTaskMSGSend],Bool) -> ([String], [String])
//		lens (r,s,_) = (map toString r, map toString s)
//
//		viewSh :: [(Int, Shared Int)] (Shared ([MTaskMSGRecv],[MTaskMSGSend],Bool)) -> Task ()
//		viewSh [] ch = return ()
//		viewSh [(i, sh):xs] ch
//		# sharename = "SDS-" +++ toString i
//		= (
//				viewSharedInformation ("SDS-" +++ toString i) [] sh ||-
//				forever (
//					enterInformation sharename []
//					>>* [OnAction ActionOk 
//							(ifValue (\j->j>=1 && j <= 3) 
//							(\c->set c sh
//								>>= \_->sendMsg (toSDSUpdate i c) ch
//								@! ()
//							)
//						)]
//				)
//			) ||- viewSh xs ch

sendMsg :: [MTaskMSGSend] (Shared ([MTaskMSGRecv],[MTaskMSGSend],Bool)) -> Task ()
sendMsg m ch = upd (\(r,s,ss)->(r,s ++ m,True)) ch @! ()

syncSerialChannel :: String TTYSettings (Shared ([MTaskMSGRecv],[MTaskMSGSend],Bool)) -> Task ()
syncSerialChannel dev opts rw = Task eval
	where
		eval event evalOpts tree=:(TCInit taskId ts) iworld=:{IWorld|world}
		= case TTYopen dev opts world of
			(False, _, world)
			# (err, world) = TTYerror world
			= (ExceptionResult (exception err), {iworld & world=world})
			(True, tty, world)
			# iworld = {iworld & world=world, resources=Just (TTYd tty)}
			= case addBackgroundTask 42 (BackgroundTask (serialDeviceBackgroundTask rw)) iworld of
				(Error e, iworld) = (ExceptionResult (exception "h"), iworld)
				(Ok _, iworld) = (ValueResult NoValue {TaskEvalInfo|lastEvent=ts,removedTasks=[],refreshSensitive=True} NoChange (TCBasic taskId ts JSONNull False), iworld)

		eval _ _ tree=:(TCBasic _ ts _ _) iworld
		= (ValueResult NoValue {TaskEvalInfo|lastEvent=ts,removedTasks=[],refreshSensitive=False} NoChange tree, iworld)

		eval event evalOpts tree=:(TCDestroy _) iworld=:{IWorld|resources,world}
		# (TTYd tty) = fromJust resources
		# (ok, world) = TTYclose tty world
		# iworld = {iworld & world=world,resources=Nothing}
		= case removeBackgroundTask 42 iworld of
			(Error e, iworld) = (ExceptionResult (exception "h"), iworld)
			(Ok _, iworld) = (DestroyedResult, iworld)

serialDeviceBackgroundTask :: (Shared ([MTaskMSGRecv],[MTaskMSGSend],Bool)) !*IWorld -> (MaybeError TaskException (), *IWorld)
serialDeviceBackgroundTask rw iworld
	= case read rw iworld of
		(Error e, iworld) = (Error $ exception "share couldn't be read", iworld)
		(Ok (r,s,ss), iworld)
		# (Just (TTYd tty)) = iworld.resources
		# tty = writet (map encode s) tty
		# (ml, tty) = case TTYavailable tty of
			(False, tty) = ([], tty)
			(_, tty)
			# (l, tty) = TTYreadline tty
			= ([decode l], tty)
		# iworld = {iworld & resources=Just (TTYd tty)}
		= case write (r++ml,[],False) rw iworld of
			(Error e, iworld) = (Error $ exception "share couldn't be written", iworld)
			(Ok _, iworld) = case notify rw iworld of
				(Error e, iworld) = (Error $ exception "share couldn't be notified", iworld)
				(Ok _, iworld) = (Ok (), iworld)
	where
		writet :: [String] -> (*TTY -> *TTY)
		writet [] = id
		writet [x:xs] = writet xs o TTYwrite x


syncNetworkChannel :: String Int (Shared ([MTaskMSGRecv], [MTaskMSGSend], Bool)) -> Task ()
syncNetworkChannel server port channel = catchAll
		(tcpconnect server port channel {ConnectionHandlers|onConnect=onConnect,whileConnected=whileConnected,onDisconnect=onDisconnect} @! ())
		(\v->traceValue v @! ())
	where
		onConnect :: String ([MTaskMSGRecv],[MTaskMSGSend],Bool) -> (MaybeErrorString String, Maybe ([MTaskMSGRecv],[MTaskMSGSend],Bool), [String], Bool)
		onConnect _ (msgs,send,sendStopped)
			= (Ok "", Just (msgs,[],sendStopped), map encode send, False)

		whileConnected :: (Maybe String) String ([MTaskMSGRecv], [MTaskMSGSend],Bool) -> (MaybeErrorString String, Maybe ([MTaskMSGRecv],[MTaskMSGSend],Bool), [String], Bool)
		whileConnected Nothing acc (msgs,send,sendStopped)
		= (Ok acc, Nothing, [], False)

		whileConnected (Just newData) acc (msgs,send,sendStopped)
		= (Ok acc, Just (msgs ++ [decode newData],[],False), map encode send, False)
		//| sendStopped = (Ok acc, Just (msgs ++ [decode newData],[],False), map encode send, False)
//		= (Ok acc, Just (msgs ++ [decode newData],[],False), [], False)
		
		onDisconnect :: String ([MTaskMSGRecv],[MTaskMSGSend],Bool) -> (MaybeErrorString String, Maybe ([MTaskMSGRecv],[MTaskMSGSend],Bool))
		onDisconnect l (msgs,send,sendStopped) = (Ok l, Nothing)