# assume EDITOR is set
BROWSER=firefox

# im not multimc who cares if you dont rename this
PNAME=mcl
MDIR=~/.$PNAME
CACHE=/tmp/$PNAME\cache
PLAT=linux

login() {
	$1 'https://login.microsoftonline.com/consumers/oauth2/v2.0/authorize?client_id=ed8c593c-4c7f-4484-8dc4-d2ce60bf62a4&response_type=code&response_mode=query&scope=XboxLive.signin&redirect_uri=https%3A%2F%2Fmothcompute.lilylenora.net%2Fmcl_auth.php'
	echo -n 'opened sign-in link in firefox. paste the output into the file that is about to be opened (press enter to continue):'
	read
	$EDITOR "$MDIR/account$2"
}

[ "$1" = edit ] && $EDITOR "$MDIR/profile/$2" && exit

[ ! -f "$MDIR/account$2" -o "$1" = 'login' ] && login "$BROWSER" "$2" && echo logged in && exit

[ $(date -d "$(jq -r .exp.mc "$MDIR/account$2")" +%s) -le $(date +%s) ] && if [ $(date -d "$(jq -r .exp.xb "$MDIR/account$2")" +%s) -le $(date +%s) ]; then
	login "$BROWSER" "$2"
	else
		curl 'https://mothcompute.lilylenora.net/mcl_auth.php?xb='$(jq -r .tok.xb "$MDIR/account$2")'&u='$(jq -r .xb_usr "$MDIR/account$2")'&e='$(jq -r .exp.xb "$MDIR/account$2") > "$MDIR/swp.account$2"
		mv "$MDIR/swp.account$2" "$MDIR/account$2"
fi

user_type=msa
auth_xuid=$(jq -r '.xb_uid' "$MDIR/account$2")
auth_player_name=$(jq -r '.mc_usr' "$MDIR/account$2")
auth_uuid=$(jq -r '.mc_uid' "$MDIR/account$2")
auth_access_token=$(jq -r '.tok.mc' "$MDIR/account$2")
auth_session="token:$auth_access_token:$auth_uuid"
clientid=$(dd if=/dev/random bs=48 count=1 status=none|base64)

mkdir -p "$CACHE" "$MDIR/libs" "$MDIR/assets" "$MDIR/assets/indexes" "$MDIR/assets/objects" "$MDIR/versions" "$CACHE/natives" "$MDIR/profile"
[ ! -f "$MDIR/launcher_profiles.json" ] && echo '{"profiles":{}}' > "$MDIR/launcher_profiles.json"

[ ! -z "$1" -a ! -f "$MDIR/profile/$1" ] && echo -ne "# type 'snapshot', 'release', or a version number. get a list with:\n# curl https://launchermeta.mojang.com/mc/game/version_manifest.json | jq -r '.versions[].id' | less\nVERSION=snapshot\nJAVA8=/usr/lib/jvm/java-8-openjdk/bin/java\nJAVA_LATEST=/bin/java\ngame_directory=~/mclinstance\n# additional jvm arguments\njvm="> "$MDIR/profile/$1" && $EDITOR "$MDIR/profile/$1"

MANIFEST='https://launchermeta.mojang.com/mc/game/version_manifest.json'
[ "$(uname -sm)" = "Linux aarch64" ] && MANIFEST='https://raw.githubusercontent.com/theofficialgman/piston-meta-arm64/main/mc/game/version_manifest.json'

echo fetching version manifest...
wget https://launchermeta.mojang.com/mc/game/version_manifest.json -qO $CACHE/version_manifest.json

CHANNEL=snapshot
JAVA8=/usr/lib/jvm/java-8-openjdk/bin/java
JAVA_LATEST=/bin/java
game_directory=~/mclinstance
VERSION="$(jq -r .latest.$CHANNEL $CACHE/version_manifest.json)"
jvm=""
VIRTP=""

[ ! -z "$1" ] && . "$MDIR/profile/$1"
mkdir -p "$game_directory"

[ "$VERSION" = 'snapshot' -o "$VERSION" = 'release' ] && CHANNEL=$VERSION && VERSION="$(jq -r .latest.$CHANNEL $CACHE/version_manifest.json)"

echo ver $VERSION

# create directory structure for version if missing
mkdir -p $MDIR/versions/$VERSION

# get json file for version
VERSION_MANIFEST=$(jq ".versions[] | select(.id==\"$VERSION\")" $CACHE/version_manifest.json | jq -r .url)
[ ! -z "$VERSION_MANIFEST" ] && [ ! -f "$MDIR/versions/$VERSION/$(basename $VERSION_MANIFEST)" ] && wget $VERSION_MANIFEST -qO "$MDIR/versions/$VERSION/$(basename $VERSION_MANIFEST)"

VERJSON="$MDIR/versions/$VERSION/$VERSION.json"
IVER=$(jq -r .inheritsFrom "$VERJSON")
[ ! -z "$IVER" ] && spruce merge "$MDIR/versions/$IVER/$IVER.json" "$VERJSON" | spruce json > "$CACHE/$VERSION.json" && export VERJSON="$CACHE/$VERSION.json"
echo json $VERJSON

# get jar file for version TODO unwrapped filename
[ ! -f "$MDIR/versions/$VERSION/$VERSION.jar" ] && wget "$(jq -r .downloads.client.url $VERJSON)" -qO "$MDIR/versions/$VERSION/$VERSION.jar"

# get version assets TODO unwrapped filename
VERSION_ASSETS="$(jq -r .assetIndex.url $VERJSON)"
[ ! -f "$MDIR/assets/indexes/$(basename $VERSION_ASSETS)" ] && wget $VERSION_ASSETS -qO "$MDIR/assets/indexes/$(basename $VERSION_ASSETS)"

# download objects TODO unwrapped filename
if [ "$(jq .map_to_resources $MDIR/assets/indexes/$(basename $VERSION_ASSETS))" = true -o "$(jq .virtual $MDIR/assets/indexes/$(basename $VERSION_ASSETS))" = true ]; then
	rsrc=1
	[ "$(jq .virtual $MDIR/assets/indexes/$(basename $VERSION_ASSETS))" = true ] && VIRTP=virtual/
	OLDIFS="$IFS"
	IFS=$'\n'
	for OBJ in `jq -r '.objects|to_entries[]|{"value":.value.hash,"key":.key}' "$MDIR/assets/indexes/$(basename $VERSION_ASSETS)"|tr -d '\n'|xargs|sed 's/[}]/\n/g'|sed 's/^.*value: //g;s/, key://g'`; do
		echo $OBJ
		OBJP="`echo $OBJ | sed 's/^[^ ]* //'`"
		OBJH="`echo $OBJ | sed 's/ .*//'`"
		eval mkdir -p '$(dirname "$MDIR/resources/$VIRTP$OBJP")'
		echo wget "https://resources.download.minecraft.net/$(echo $OBJH | cut -b 1,2)/$OBJH" -qO "$MDIR/resources/$VIRTP$OBJP"
		[ ! -f "$MDIR/resources/$VIRTP$OBJP" ] && wget "https://resources.download.minecraft.net/$(echo $OBJH | cut -b 1,2)/$OBJH" -qO "$MDIR/resources/$VIRTP$OBJP"
	done
	IFS="$OLDIFS"
else
	for OBJ in `jq -r .objects[].hash "$MDIR/assets/indexes/$(basename $VERSION_ASSETS)"`; do
		mkdir -p "$MDIR/assets/objects/$(echo $OBJ | cut -b 1,2)"
		[ ! -f "$MDIR/assets/objects/$(echo $OBJ | cut -b 1,2)/$OBJ" ] && echo wget "https://resources.download.minecraft.net/$(echo $OBJ | cut -b 1,2)/$OBJ" && wget "https://resources.download.minecraft.net/$(echo $OBJ | cut -b 1,2)/$OBJ" -qO "$MDIR/assets/objects/$(echo $OBJ | cut -b 1,2)/$OBJ"
	done
fi

echo object download complete

export classpath="$MDIR/versions/$VERSION/$VERSION.jar"

# get non-native libs
fetchlib() {
LIBJSON="$1"
for LIBINDEX in `seq 0 $(($(jq '.libraries|length' "$LIBJSON")-1))`; do
	echo lib $LIBINDEX
	LIBPATH="$MDIR/libraries/"`jq -r ".libraries[$LIBINDEX].downloads.artifact.path" "$LIBJSON"`
	LIBURL=`jq -r ".libraries[$LIBINDEX].downloads.artifact.url" "$LIBJSON"`
	LIBNAME=`jq -r ".libraries[$LIBINDEX].name" "$LIBJSON"`

	mkdir -p "$(dirname $LIBPATH)"
	[ ! -f "$LIBPATH" ] && echo $LIBURL '=>' "$LIBPATH" && wget $LIBURL -qO "$LIBPATH"
	QNATIVE=`jq -r .libraries[$LIBINDEX].downloads.classifiers."\"natives-$PLAT\"" "$LIBJSON"`
	# TODO create natives for game
	[ ! "$QNATIVE" = "null" ] &&
		echo HAS NATIVE &&
		LIBPATH="$MDIR/libs/$VERSION/"`jq -r .libraries[$LIBINDEX].downloads.classifiers."\"natives-$PLAT\"".path "$LIBJSON"` &&
		LIBURL=`jq -r .libraries[$LIBINDEX].downloads.classifiers.'"natives-linux"'.url "$LIBJSON"` &&
		mkdir -p "$(dirname $LIBPATH)" &&
		echo $LIBURL '=>' "$LIBPATH" &&
		[ ! -f "$LIBPATH" ] && wget $LIBURL -qO "$LIBPATH" &&
		unzip -o "$LIBPATH" -d $CACHE/natives/$VERSION

	if [ ! "$LIBURL" = null ]; then
		classpath="$classpath:$LIBPATH"
	else
		classpath="$classpath:$(find `echo $MDIR/libraries/$LIBNAME | sed 's/:/\//g'` | grep -E '\.jar$')"
	fi
done
}

[ ! -z "$IVER" ] && fetchlib "$MDIR/versions/$IVER/$IVER.json"
fetchlib "$MDIR/versions/$VERSION/$VERSION.json"

# all the libs in the classpath, minus the version jar
# find /home/NAME/.minecraft/libraries/ | grep jar | sed 's/^\/home\/NAME\/.minecraft\/libraries\///g' | grep -v natives | wc -l

library_directory="$MDIR/libraries"
classpath_separator=":"
natives_directory=$CACHE/natives/$VERSION
mkdir -p $natives_directory
#classpath=`find $CLASSPT | grep -v "natives-" | grep -E '.jar$' | xargs | sed 's/ /:/g'`:"$MDIR/versions/$VERSION/$VERSION.jar"
version_name=$VERSION
assets_root="$MDIR/assets"
game_assets="$MDIR/assets"
[ "$rsrc" = 1 ] && game_assets="$MDIR/resources/$VIRTP"
#game_assets="$assets_root/virtual/pre-1.6" ???
assets_index_name=`jq -r .assetIndex.id "$VERJSON"`
version_type=`jq -r .type "$VERJSON"`

# TODO natives
mkdir -p $CACHE/natives/$VERSION $game_directory
for i in `find "$MDIR/libs/$VERSION" | grep natives-$PLAT`; do unzip -o $i -d $CACHE/natives/$VERSION; done

jvm="-Xss1M -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M $jvm "`jq -r .arguments.jvm "$MDIR/versions/$VERSION/$VERSION.json" --indent 1 | grep -E '^ "' | sed 's/,$//' | xargs`
[ ! -z "$IVER" ] && jvm="$jvm "`jq -r .arguments.jvm "$MDIR/versions/$IVER/$IVER.json" --indent 1 | grep -E '^ "' | sed 's/,$//' | xargs`

# TODO determine correct java version for old release versions
JAVAV=$JAVA_LATEST

setleg() {
	echo legacy version detected
	JAVAV=$JAVA8
	#legacygame="--tweakClass net.minecraft.launchwrapper.AlphaVanillaTweaker --gameDir ${game_directory} --assetsDir ${assets_root}"
	jvm="-Djava.library.path=${natives_directory} -cp $classpath $jvm"
}

[ "$version_type" = "old_alpha" -o "$version_type" = "old_beta" -o "$(echo $VERSION | sed 's/^[^\.]*\.//;s/\.[^\.]*$//')" -lt '13' ] && setleg
#TODO optifine
#[ $? = 2 ] && echo $VERSION | grep -v w && setleg

dbrun() {
	echo $@ | sed 's/:/\n/g'
	$@
}

GAMEARGS=`jq -r .arguments.game "$MDIR/versions/$VERSION/$VERSION.json" --indent 1 | grep -E '^ "' | sed 's/,$//' | xargs`
[ ! -z "$IVER" ] && GAMEARGS="$GAMEARGS "`jq -r .arguments.game "$MDIR/versions/$IVER/$IVER.json" --indent 1 | grep -E '^ "' | sed 's/,$//' | xargs`

cd $MDIR
eval dbrun $JAVAV \
$jvm \
`jq -r .mainClass "$VERJSON" --indent 1` \
`jq -r .minecraftArguments "$VERJSON" --indent 1 | sed 's/,$//' | xargs | sed "s/null//g"` \
$GAMEARGS $legacygame