{- git-annex command
 -
 - Copyright 2010-2017 Joey Hess <id@joeyh.name>
 -
 - Licensed under the GNU AGPL version 3 or higher.
 -}

module Command.Add where

import Command
import Annex.Ingest
import Logs.Location
import Annex.Content
import qualified Annex
import qualified Annex.Queue
import qualified Database.Keys
import Annex.FileMatcher
import Annex.Link
import Annex.Tmp
import Messages.Progress
import Git.FilePath
import qualified Utility.RawFilePath as R

cmd :: Command
cmd = notBareRepo $ 
	withGlobalOptions [jobsOption, jsonOptions, jsonProgressOption, fileMatchingOptions] $
		command "add" SectionCommon "add files to annex"
			paramPaths (seek <$$> optParser)

data AddOptions = AddOptions
	{ addThese :: CmdParams
	, includeDotFiles :: Bool
	, batchOption :: BatchMode
	, updateOnly :: Bool
	}

optParser :: CmdParamsDesc -> Parser AddOptions
optParser desc = AddOptions
	<$> cmdParams desc
	<*> switch
		( long "include-dotfiles"
		<> help "don't skip dotfiles"
		)
	<*> parseBatchOption
	<*> switch
		( long "update"
		<> short 'u'
		<> help "only update tracked files"
		)

seek :: AddOptions -> CommandSeek
seek o = startConcurrency commandStages $ do
	largematcher <- largeFilesMatcher
	addunlockedmatcher <- addUnlockedMatcher
	let gofile file = ifM (checkFileMatcher largematcher (fromRawFilePath file) <||> Annex.getState Annex.force)
		( start file addunlockedmatcher
		, ifM (annexAddSmallFiles <$> Annex.getGitConfig)
			( startSmall file
			, stop
			)
		)
	case batchOption o of
		Batch fmt
			| updateOnly o ->
				giveup "--update --batch is not supported"
			| otherwise -> batchFilesMatching fmt (gofile . toRawFilePath)
		NoBatch -> do
			l <- workTreeItems (addThese o)
			let go a = a (commandAction . gofile) l
			unless (updateOnly o) $
				go (withFilesNotInGit (not $ includeDotFiles o))
			go withFilesMaybeModified
			go withUnmodifiedUnlockedPointers

{- Pass file off to git-add. -}
startSmall :: RawFilePath -> CommandStart
startSmall file = starting "add" (ActionItemWorkTreeFile file) $
	next $ addSmall file

addSmall :: RawFilePath -> Annex Bool
addSmall file = do
	showNote "non-large file; adding content to git repository"
	addFile file

addFile :: RawFilePath -> Annex Bool
addFile file = do
	ps <- forceParams
	Annex.Queue.addCommand "add" (ps++[Param "--"]) [fromRawFilePath file]
	return True

start :: RawFilePath -> AddUnlockedMatcher -> CommandStart
start file addunlockedmatcher = do
	mk <- liftIO $ isPointerFile file
	maybe go fixuppointer mk
  where
	go = ifAnnexed file addpresent add
	add = liftIO (catchMaybeIO $ R.getSymbolicLinkStatus file) >>= \case
		Nothing -> stop
		Just s 
			| not (isRegularFile s) && not (isSymbolicLink s) -> stop
			| otherwise -> 
				starting "add" (ActionItemWorkTreeFile file) $
					if isSymbolicLink s
						then next $ addFile file
						else perform file addunlockedmatcher
	addpresent key = 
		liftIO (catchMaybeIO $ R.getSymbolicLinkStatus file) >>= \case
			Just s | isSymbolicLink s -> fixuplink key
			_ -> add
	fixuplink key = starting "add" (ActionItemWorkTreeFile file) $ do
		-- the annexed symlink is present but not yet added to git
		liftIO $ removeFile (fromRawFilePath file)
		addLink (fromRawFilePath file) key Nothing
		next $
			cleanup key =<< inAnnex key
	fixuppointer key = starting "add" (ActionItemWorkTreeFile file) $ do
		-- the pointer file is present, but not yet added to git
		Database.Keys.addAssociatedFile key =<< inRepo (toTopFilePath file)
		next $ addFile file

perform :: RawFilePath -> AddUnlockedMatcher -> CommandPerform
perform file addunlockedmatcher = withOtherTmp $ \tmpdir -> do
	lockingfile <- not <$> addUnlocked addunlockedmatcher
		(MatchingFile (FileInfo file file))
	let cfg = LockDownConfig
		{ lockingFile = lockingfile
		, hardlinkFileTmpDir = Just tmpdir
		}
	ld <- lockDown cfg (fromRawFilePath file)
	let sizer = keySource <$> ld
	v <- metered Nothing sizer $ \_meter meterupdate ->
		ingestAdd meterupdate ld
	finish v
  where
	finish (Just key) = next $ cleanup key True
	finish Nothing = stop

cleanup :: Key -> Bool -> CommandCleanup
cleanup key hascontent = do
	maybeShowJSON $ JSONChunk [("key", serializeKey key)]
	when hascontent $
		logStatus key InfoPresent
	return True