#!/bin/bash
# Copyright (c) 2022 fithwum
# All rights reserved

MC_DIR=/MCserver
EULA_FILE=$MC_DIR/eula.txt
EULA_MARKER=$MC_DIR/.eula_accepted

# Main Install Links
INSTALLER_FILE=https://maven.minecraftforge.net/net/minecraftforge/forge/$MC_VERSION-$FORGE_VERSION/forge-$MC_VERSION-$FORGE_VERSION-installer.jar
MC_RUN_FILE=https://gitea.fithwum.tech/fithwum/minecraft/raw/branch/master/neoforged/run.sh

# Main install (Debian).
# Check for server files and download if needed.
if [ -e $MC_DIR/forge-$MC_VERSION-$FORGE_VERSION-installer.jar ]
	then
		echo " "
		echo "INFO ! forge-$MC_VERSION-$FORGE_VERSION-installer.jar found starting now."
	else
		echo " "
		echo "WARNING ! forge-$MC_VERSION-$FORGE_VERSION-installer.jar is out of date/missing ... will download now."
		echo " "
		echo "INFO ! Cleaning old files."
		cd $MC_DIR
		mkdir /old-server-versions/
		mv neoforge-*.jar old-server-versions/
		mv run-*.sh old-server-versions/ 
		mv /libraries /libraries_OLD
		mv /libraries_OLD old-server-versions/
		wget --no-cache --show-progress --progress=bar:force:noscroll $INSTALLER_FILE -O forge-$MC_VERSION-$FORGE_VERSION-installer.jar
		chmod +x forge-$MC_VERSION-$FORGE_VERSION-installer.jar
		java -jar forge-$MC_VERSION-$FORGE_VERSION-installer.jar --installServer
		mv run.sh run-$MC_VERSION-$FORGE_VERSION.sh
		chmod +x run-$MC_VERSION-$FORGE_VERSION.sh
		cd ..
fi

echo "INFO ! Setting game port."
if [ -f $MC_DIR/server.properties ]; then
	sed -i '/server-port='*'/c\server-port='$GAME_PORT'' $MC_DIR/server.properties
fi

echo "INFO ! Setting java settings."
cat > $MC_DIR/user_jvm_args.txt <<EOF
-Xmx${XMX_SIZE}
-Xms${XMS_SIZE}
EOF
[ -n "$XMN_SIZE" ] && echo "-Xmn${XMN_SIZE}" >> $MC_DIR/user_jvm_args.txt

# Wait briefly for installer/server to generate eula.txt
if [ ! -f "$EULA_FILE" ] && [ ! -f "$EULA_MARKER" ]; then
    echo "INFO ! Waiting for EULA generation..."
    sleep 5
fi

# If EULA already accepted once, never touch it again
if [ -f "$EULA_MARKER" ]; then
    echo "INFO ! EULA previously accepted"
    return 0 2>/dev/null || true
fi

# First-time decision
if [ "$ACCEPT_EULA" = "true" ]; then
    echo "INFO ! Accepting EULA (one-time)"
    sed -i 's/eula=false/eula=true/' "$EULA_FILE" 2>/dev/null \
    || echo "eula=true" > "$EULA_FILE"
    touch "$EULA_MARKER"
elif [ "$ACCEPT_EULA" = "false" ]; then
    echo "WARNING ! EULA not accepted on first run"
    echo "WARNING ! Set ACCEPT_EULA=true to proceed"
    sleep infinity
else
    echo "ERROR ! ACCEPT_EULA must be set to true or false on first run"
    sleep infinity
fi

# Set permissions.
chown 99:100 -R $MC_DIR
chmod 777 -R $MC_DIR

sleep 1

# Run Minecraft server.
echo " "
echo "INFO ! Starting Minecraft Server $MC_VERSION-$FORGE_VERSION"
cd $MC_DIR
exec ./run-$MC_VERSION-$FORGE_VERSION.sh nogui

exit