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

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

VERSION_CHECK=$(curl -s "https://piston-meta.mojang.com/mc/game/version_manifest_v2.json" | grep -Pom 1 '"url": "\K[^"]*'$MC_VERSION'.json')
MC_SERVER_FILE=$(curl -s $VERSION_CHECK | jq --raw-output '.downloads.server.url')
MC_RUN_FILE=https://gitea.fithwum.tech/fithwum/minecraft/raw/branch/master/vanilla/run.sh

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 MCserver-$MC_VERSION.jar is out of date/missing ...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

# Looking for run-${MC_VERSION}.sh
if [ -e $MC_DIR/run-$MC_VERSION.sh ]
	then
		echo " "
		echo "INFO ! run-$MC_VERSION.sh found ... will use existing file."
	else
		echo " "
		echo "WARNING ! run.sh is out of date/missing ... will download now."
		rm -fr $MC_DIR/run_*.sh
		wget --no-cache --show-progress --progress=bar:force:noscroll $MC_RUN_FILE -O $MC_DIR/run-$MC_VERSION.sh
		chmod +x $MC_DIR/run-$MC_VERSION.sh
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

# Check for EULA
# if [ ! -f $MC_DIR/eula.txt ]; then
# 	:
# else
# 	if [ "$ACCEPT_EULA" == "false" ]; then
# 		if grep -rq 'eula=true' $MC_DIR/eula.txt; then
# 			sed -i '/eula=true/c\eula=false' $MC_DIR/eula.txt
# 		fi
# 			echo " "
# 			echo "WARNING ! EULA not accepted, you must accept the EULA"
# 			echo "			to start the Server, putting server in sleep mode"
# 		sleep infinity
#     fi
# fi

# if [ ! -f $MC_DIR/eula.txt ]; then
# 	echo " "
# 	echo "WARNING ! EULA not found please stand by..."
# 	sleep 5
# fi
# if [ "$ACCEPT_EULA" == "true" ]; then
# 	if grep -rq 'eula=false' $MC_DIR/eula.txt; then
# 		sed -i '/eula=false/c\eula=true' $MC_DIR/eula.txt
# 		echo " "
# 		echo "INFO ! EULA accepted, server restarting, please wait..."
# 		sleep 1
# 		cd $MC_DIR
# 		exec ./run-$MC_VERSION-$FORGE_VERSION.sh nogui
# 		exit 0
# 	fi
# elif [ "$ACCEPT_EULA" == "false" ]; then
# 	echo " "
# 	echo "WARNING ! EULA not accepted, you must accept the EULA"
# 	echo "			to start the Server, putting server in sleep mode"
# 	sleep infinity
# else
# 	echo " "
# 	echo "WARNING ! Something went wrong, please check EULA variable"
# fi

# Test EULA
# if [ ! -f "$EULA_FILE" ]; then
#     echo "WARNING ! EULA not found, waiting for generation..."
#     sleep 5
# fi

# if [ "$ACCEPT_EULA" = "true" ]; then
#     sed -i 's/eula=false/eula=true/' "$EULA_FILE" 2>/dev/null
#     echo "INFO ! EULA accepted"

# elif [ "$ACCEPT_EULA" = "false" ]; then
#     sed -i 's/eula=true/eula=false/' "$EULA_FILE" 2>/dev/null
#     echo "WARNING ! EULA not accepted, server will not start"
#     sleep infinity

# else
#     echo "WARNING ! ACCEPT_EULA must be set to true or false"
#     sleep infinity
# fi

# 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"
exec $MC_DIR/run-$MC_VERSION.sh --dataPath=$MC_DIR

exit