#!/bin/bash
# /etc/init.d/minecraft

### BEGIN INIT INFO
# Provides:   minecraft
# Required-Start: $local_fs $remote_fs
# Required-Stop:  $local_fs $remote_fs
# Should-Start:   $network
# Should-Stop:    $network
# Default-Start:  2 3 4 5
# Default-Stop:   0 1 6
# Short-Description:    Minecraft server
# Description:    Init script for minecraft server. In development.
### END INIT INFO

MINECRAFT_DIR="/srv/minecraft-server"

START_COMMAND="java -Xincgc -Xmx8G -XX:MaxPermSize=128M -jar Spigot.jar"

SCREEN_NAME="minecraft-server"

attach() {
    screen -Rx $SCREEN_NAME
}

start() {
    echo "Starting minecraft server..."
    if cd $MINECRAFT_DIR && screen -dmS $SCREEN_NAME $START_COMMAND; then
        echo "Minecraft server started. Use 'sudo service minecraft attach'."
    fi
}

stop() {
    if send "stop"; then
        echo "Minecraft server is stopping..."
    fi
}

restart() {
    echo "Feature is not yet implemented."
    # echo "Restarting minecraft server..."
    # stop
    # start
}

status() {
    screen_info=$(screen -list | grep $SCREEN_NAME)
    if [ ! -z "$screen_info" ]; then
        echo "Minecraft server is running. Screen session is:"
        echo $screen_info
    else
        echo "Minecraft server is stopped."
    fi
}

send() {
    screen -p 0 -S minecraft -X stuff "$1$(printf \\r)"
}

update() {
    echo "Feature is not yet implemented."
}

log() {
    less -r "$MINECRAFT_DIR/logs/latest.log"
}

case "$1" in
    attach)
        attach
        ;;
    start)
        start
        ;;
    stop)
        stop
        ;;
    restart)
        restart
        ;;
    status)
        status
        ;;
    update)
        update
        ;;
    send)
        if !([ -z $2 ]); then
            echo "Sending '$2' to the server."
            send $2
        else
            echo "Specify a command to send to the server."
        fi
        ;;
    log)
        log
        ;;
    *)
        # echo "Usage: {attach|start|stop|restart|status|log|update <version>|send <command>}"
        echo "Usage: {attach|start|stop|status|log|send <command>}"
        exit 1
        ;;
esac