#!/bin/bash

CWD=$(pwd)

# Check if the minecraft user and group exist. If not, then bail.
if [ "$(id -g minecraft 2> /dev/null)" != "987" -o "$(id -u minecraft 2> /dev/null)" != "987" ]; then
    echo "  You must have an 'minecraft' user and group to run this script."
    echo "    # groupadd -g 987 minecraft"
    echo "    # useradd -d /opt/$PRGNAM -g minecraft -s /bin/bash -u 987 minecraft --system "
    exit 1
fi

PRGNAM=$(basename $CWD)
VERSION=${VERSION:-$(curl https://www.minecraft.net/en-us/download/server | grep "minecraft_server.*\.jar" -o | grep -o "[0-9][0-9.]*[0-9]" | head -n1)}
ARCH=${ARCH:-$(uname -m)}
BUILD=${BUILD:-1}
TAG=${TAG:-gwh}

TMP=${TMP:-/tmp/$TAG}
PKG=$TMP/pkg-$PRGNAM
OUTPUT=${OUTPUT:-/tmp}
PREFIX=/usr

REPOSITORY=${REPOSITORY:-/var/cache/SlackBuilds.gwh/$PRGNAM}

mkdir -p $REPOSITORY

[ ! -e  $REPOSITORY/${PRGNAM}-${VERSION}.jar ] && wget -c $(curl https://www.minecraft.net/en-us/download/server | grep -o "https.*server\.jar") -O $REPOSITORY/${PRGNAM}-${VERSION}.jar

rm -fr $PKG

mkdir -p $PKG/opt/$PRGNAM
cp $REPOSITORY/${PRGNAM}-${VERSION}.jar $PKG/opt/$PRGNAM/$PRGNAM.jar
cat <<EOF > $PKG/opt/$PRGNAM/start.sh
#!/bin/bash
java -Xms1G -Xmx1G -jar /opt/$PRGNAM/$PRGNAM.jar nogui
EOF
chmod +x $PKG/opt/$PRGNAM/start.sh
chown -R minecraft:minecraft $PKG/opt/$PRGNAM/

mkdir -p $PKG/etc/rc.d/
cat <<EOF > $PKG/etc/rc.d/rc.$PRGNAM
#!/bin/bash
#Slackware startup deamon script

# Name of Service
NAME="Minecraft Daemon"

# user used to run the daemon
USERNAME=minecraft

PIDFILE=/var/run/minecraft.pid

func_stop() {
    [ -e \$PIDFILE ] && kill \$(cat \$PIDFILE) && rm \$PIDFILE
}

func_start() {
    echo -n "Starting \$NAME ... "
    su - \$USERNAME -c /opt/$PRGNAM/start.sh &
    echo $! > \$PIDFILE
}


case \$1 in
    "start")
        func_start
        ;;

    "stop")
        func_stop
        ;;

    "restart")
        func_stop
        sleep 2
        func_start
        ;;
    *)
        echo "Usage; start|stop|restart"
        ;;
esac
EOF
chmod +x $PKG/etc/rc.d/rc.$PRGNAM

mkdir -p $PKG/install
cat <<EOF > $PKG/install/doinst.sh
#!/bin/bash
[ ! -e /opt/$PRGNAM/eula.txt ] && /etc/rc.d/rc.$PRGNAM start
EOF

cat <<EOF > $PKG/install/slack-desc
       |-----handy-ruler--------------------------------------------------------|
$PRGNAM: $PRGNAM (Proprietary Minecraft Server)
$PRGNAM:
$PRGNAM:
$PRGNAM:
$PRGNAM:
$PRGNAM:
$PRGNAM: https://www.minecraft.net/en-us/download/server/
$PRGNAM:
$PRGNAM:
$PRGNAM:
$PRGNAM:
EOF

cd $PKG
rm -f $PKG/{,usr/}lib$(uname -m | grep -o 64)/*.la

/sbin/makepkg --linkadd y --chown n --prepend $OUTPUT/$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.txz