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

DEBIAN_VERSION=13

MC_DIR_OLD=/mc_server
MC_DIR=/mcserver

if [ -d "$MC_DIR_OLD" ]; then
    mkdir -p "$MC_DIR"
    mv $MC_DIR_OLD/* "$MC_DIR/" 2>/dev/null || true
fi

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 $VERSION_CHECK | jq --raw-output '.downloads.server.url')
BUKKIT_INSTALLER_FILE=https://cdn.getbukkit.org/craftbukkit/craftbukkit-$MC_VERSION.jar
FABRIC_SERVER_FILE=https://meta.fabricmc.net/v2/versions/loader/$MC_VERSION/$FABRIC_VERSION/$FABRIC_INSTALLER_VERSION/server/jar
QUILT_INSTALLER_FILE=https://quiltmc.org/api/v1/download-latest-installer/java-universal
FORGE_INSTALLER_FILE=https://maven.minecraftforge.net/net/minecraftforge/forge/$MC_VERSION-$FORGE_VERSION/forge-$MC_VERSION-$FORGE_VERSION-installer.jar
NEOFORGED_INSTALLER_FILE=https://maven.neoforged.net/releases/net/neoforged/neoforge/$NEOFORGED_VERSION/neoforge-$NEOFORGED_VERSION-installer.jar

# Install java
if [ $JAVA_VERSION = "openjdk-21-jre" ]; then
    echo "INFO ! $JAVA_VERSION Selected"
	if dpkg -s $JAVA_VERSION &> /dev/null
		then
			echo "INFO ! $JAVA_VERSION installed ... moving on."
		else
			echo " "
			echo "WARNING ! $JAVA_VERSION not installed ... will install now."
			apt-get update
			apt-get --no-install-recommends -y install $JAVA_VERSION
	fi
if [ $JAVA_VERSION = "openjdk-25-jre" ]; then
    echo "INFO ! $JAVA_VERSION Selected"
	if dpkg -s $JAVA_VERSION &> /dev/null
		then
			echo "INFO ! $JAVA_VERSION installed ... moving on."
		else
			echo " "
			echo "WARNING ! $JAVA_VERSION not installed ... will install now."
			apt-get update
			apt-get --no-install-recommends -y install $JAVA_VERSION
	fi
elif [ $JAVA_VERSION = "msopenjdk-21" ]; then
    echo "INFO ! $JAVA_VERSION Selected"
	if dpkg -s $JAVA_VERSION &> /dev/null
		then
			echo "INFO ! $JAVA_VERSION installed ... moving on."
		else
			echo " "
			echo "WARNING ! $JAVA_VERSION not installed ... will install now."
			wget https://packages.microsoft.com/config/debian/$DEBIAN_VERSION/packages-microsoft-prod.deb -O packages-microsoft-prod.deb \
			dpkg -i packages-microsoft-prod.deb \
			apt-get update && apt-get install -y $JAVA_VERSION \
			apt-get -y update && apt-get -y --fix-broken install
	fi
elif [ $JAVA_VERSION = "msopenjdk-25" ]; then
    echo "INFO ! $JAVA_VERSION Selected"
	if dpkg -s $JAVA_VERSION &> /dev/null
		then
			echo "INFO ! $JAVA_VERSION installed ... moving on."
		else
			echo " "
			echo "WARNING ! $JAVA_VERSION not installed ... will install now."
			wget https://packages.microsoft.com/config/debian/$DEBIAN_VERSION/packages-microsoft-prod.deb -O packages-microsoft-prod.deb \
			dpkg -i packages-microsoft-prod.deb \
			apt-get update && apt-get install -y $JAVA_VERSION \
			apt-get -y update && apt-get -y --fix-broken install
	fi
else
    echo "ERROR ! Java version must be set first run"
    sleep infinity
fi

# Main install (Debian).
# Check for server files and download if needed.
if [ $MC_TYPE = "vanilla" ]; then
    echo "INFO ! Vanilla Selected"
	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."
			cd $MC_DIR
			mkdir -pv old-server-versions/
			rm -fr *.jar
			rm -fr libraries
			mv -v *.log old-server-versions/
			wget --no-cache --show-progress --progress=bar:force:noscroll $MC_SERVER_FILE -O mcserver-$MC_VERSION.jar
			chmod +x mcserver-$MC_VERSION.jar
			echo " "
			echo "WARNING ! run-$MC_TYPE-$MC_VERSION.sh is out of date/missing ... will generate now."
			mv -v run-*.sh old-server-versions/
			cat > run-$MC_TYPE-$MC_VERSION.sh <<- "EOF"
			#!/bin/bash
			# Copyright (c) 2022 fithwum
			# All rights reserved

			cd /mc_server
			JAR=./mcserver-*.jar

			while [ true ]; do
				java -Xmx$XMX_SIZE -Xms$XMS_SIZE -Xmn$XMN_SIZE -Dbungee.epoll=false -jar $JAR nogui
				if [ $? -eq 0 ]; then
					break
				fi
			done
			EOF
			chmod +x run-$MC_TYPE-$MC_VERSION.sh
			cd ..
	fi
elif [ $MC_TYPE = "bukkit" ]; then
    echo "INFO ! Bukkit Selected"
	if [ -e $MC_DIR/craftbukkit-$MC_VERSION.jar ]
		then
			echo " "
			echo "INFO ! craftbukkit-$MC_VERSION.jar found starting now."
		else
			echo " "
			echo "WARNING ! craftbukkit-$MC_VERSION.jar is out of date/missing ... will download now."
			echo " "
			echo "INFO ! Cleaning old files."
			cd $MC_DIR
			mkdir -pv old-server-versions/
			rm -fr *.jar
			rm -fr libraries
			mv -v *.log old-server-versions/
			wget --no-cache --show-progress --progress=bar:force:noscroll $BUKKIT_INSTALLER_FILE -O craftbukkit-$MC_VERSION.jar
			chmod +x craftbukkit-$MC_VERSION.jar
			echo " "
			echo "WARNING ! run-$MC_TYPE-$MC_VERSION.sh is out of date/missing ... will generate now."
			mv -v run-*.sh old-server-versions/
			cat > run-$MC_TYPE-$MC_VERSION.sh <<- "EOF"
			#!/bin/bash
			# Copyright (c) 2022 fithwum
			# All rights reserved

			cd /mc_server
			JAR=./craftbukkit-*.jar
			
			while [ true ]; do
				java -Xmx$XMX_SIZE -Xms$XMS_SIZE -Xmn$XMN_SIZE -Dbungee.epoll=false -jar $JAR nogui
				if [ $? -eq 0 ]; then
					break
				fi
			done
			EOF
			chmod +x run-$MC_TYPE-$MC_VERSION.sh
			cd ..
	fi
elif [ $MC_TYPE = "fabric" ]; then
    echo "INFO ! Fabric Selected"
	if [ -e $MC_DIR/fabric-$MC_VERSION-$FABRIC_VERSION.jar ]
		then
			echo " "
			echo "INFO ! fabric-$MC_VERSION-$FABRIC_VERSION.jar found starting now."
		else
			echo " "
			echo "WARNING ! fabric-$MC_VERSION-$FABRIC_VERSION.jar is out of date/missing ... will download now."
			echo " "
			echo "INFO ! Cleaning old files."
			cd $MC_DIR
			mkdir -pv old-server-versions/
			rm -fr *.jar
			rm -fr libraries
			mv -v *.log old-server-versions/
			wget --no-cache --show-progress --progress=bar:force:noscroll $FABRIC_SERVER_FILE -O fabric-$MC_VERSION-$FABRIC_VERSION.jar
			chmod +x fabric-$MC_VERSION-$FABRIC_VERSION.jar
			echo " "
			echo "WARNING ! run-$MC_TYPE-$MC_VERSION.sh is out of date/missing ... will generate now."
			mv -v run-*.sh old-server-versions/
			cat > run-$MC_TYPE-$MC_VERSION.sh <<- "EOF"
			#!/bin/bash
			# Copyright (c) 2022 fithwum
			# All rights reserved

			cd /mc_server
			JAR=./fabric-*-*.jar
			
			while [ true ]; do
				java -Xmx$XMX_SIZE -Xms$XMS_SIZE -Xmn$XMN_SIZE -Dbungee.epoll=false -jar $JAR nogui
				if [ $? -eq 0 ]; then
					break
				fi
			done
			EOF
			chmod +x run-$MC_TYPE-$MC_VERSION.sh
			cd ..
	fi
elif [ $MC_TYPE = "quilt" ]; then
    echo "INFO ! Quilt Selected"
	if [ -e $MC_DIR/quilt-installer-$QUILT_VERSION.jar ]
		then
			echo " "
			echo "INFO ! quilt-installer-$QUILT_VERSION.jar found starting now."
		else
			echo " "
			echo "WARNING ! quilt-installer-$QUILT_VERSION.jar is out of date/missing ... will download now."
			echo " "
			echo "INFO ! Cleaning old files."
			cd $MC_DIR
			mkdir -pv old-server-versions/
			rm -fr *.jar
			rm -fr libraries
			mv -v *.log old-server-versions/
			wget --no-cache --show-progress --progress=bar:force:noscroll $QUILT_INSTALLER_FILE -O quilt-installer-$QUILT_VERSION.jar
			chmod +x quilt-installer-$QUILT_VERSION.jar
			java -jar quilt-installer-$QUILT_VERSION.jar install server $MC_VERSION --download-server
			cd server
			mv -v * $MC_DIR
			cd ..
			rm -fr server
			echo " "
			echo "WARNING ! run-$MC_TYPE-$MC_VERSION.sh is out of date/missing ... will generate now."
			mv -v run-*.sh old-server-versions/
			cat > run-$MC_TYPE-$MC_VERSION.sh <<- "EOF"
			#!/bin/bash
			# Copyright (c) 2022 fithwum
			# All rights reserved
			
			cd /mc_server
			JAR=./quilt-server-launch.jar
			
			while [ true ]; do
				java -Xmx$XMX_SIZE -Xms$XMS_SIZE -Xmn$XMN_SIZE -Dbungee.epoll=false -jar $JAR nogui
				if [ $? -eq 0 ]; then
					break
				fi
			done
			EOF
			chmod +x run-$MC_TYPE-$MC_VERSION.sh
			cd ..
	fi
elif [ $MC_TYPE = "forge" ]; then
    echo "INFO ! Forge Selected"
	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 -pv old-server-versions/
			rm -fr *.jar
			rm -fr libraries
			mv -v *.log old-server-versions/
			mv -v run-*.sh old-server-versions/
			wget --no-cache --show-progress --progress=bar:force:noscroll $FORGE_INSTALLER_FILE -O forge-$MC_VERSION-$FORGE_VERSION-installer.jar
			chmod +x forge-$MC_VERSION-$FORGE_VERSION-installer.jar
			java -jar forge-$MC_VERSION-$FORGE_VERSION-installer.jar --installServer
			mv -v run.sh run-$MC_TYPE-$MC_VERSION.sh
			chmod +x run-$MC_TYPE-$MC_VERSION.sh
			tee user_jvm_args.txt <<-EOF
			-Xmx${XMX_SIZE}
			-Xms${XMS_SIZE}
			-Xmn${XMN_SIZE}
			EOF
			cd ..
	fi
elif [ $MC_TYPE = "neoforged" ]; then
    echo "INFO ! Neoforged Selected"
	if [ -e $MC_DIR/neoforge-$NEOFORGED_VERSION-installer.jar ]
		then
			echo " "
			echo "INFO ! neoforge-$NEOFORGED_VERSION-installer.jar found starting now."
		else
			echo " "
			echo "WARNING ! neoforge-$NEOFORGED_VERSION-installer.jar is out of date/missing ... will download now."
			echo " "
			echo "INFO ! Cleaning old files."
			cd $MC_DIR
			mkdir -pv old-server-versions/
			rm -fr *.jar
			rm -fr libraries
			mv -v *.log old-server-versions/
			mv -v run-*.sh old-server-versions/
			wget --no-cache --show-progress --progress=bar:force:noscroll $NEOFORGED_INSTALLER_FILE -O neoforge-$NEOFORGED_VERSION-installer.jar
			chmod +x neoforge-$NEOFORGED_VERSION-installer.jar
			java -jar neoforge-$NEOFORGED_VERSION-installer.jar --installServer
			mv -v run.sh run-$MC_TYPE-$MC_VERSION.sh
			chmod +x run-$MC_TYPE-$MC_VERSION.sh
			tee user_jvm_args.txt <<-EOF
			-Xmx${XMX_SIZE}
			-Xms${XMS_SIZE}
			-Xmn${XMN_SIZE}
			EOF
			cd ..
	fi
else
    echo "ERROR ! MC_TYPE must be set first run"
    sleep infinity
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

# 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 776 -R $MC_DIR

sleep 1

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

exit