#!/bin/bash
# This script installs the Project Zomboid dedicated server on an Arch Linux system.
echo "This script will install the Project Zomboid dedicated server on an Arch Linux system."

# detect if 'steamcmd' is installed
if ! command -v steamcmd &> /dev/null; then
    echo "steamcmd could not be found. Please install it first."
    if ! command -v yay &> /dev/null; then
        echo "Using makepkg to install steamcmd."
        git clone https://aur.archlinux.org/steamcmd.git
        cd steamcmd
        makepkg -si --noconfirm
        cd ..
    else
	echo "Using yay to install steamcmd."
   	yay -S steamcmd --noconfirm
    fi
fi

sudo useradd -m -d /home/pzserver -s /bin/bash pzserver

sudo mkdir /opt/pzserver
sudo chown pzserver:pzserver /opt/pzserver

string="
// update_zomboid.txt
//
@ShutdownOnFailedCommand 1 // set 0 if updating multiple servers at once
@NoPromptForPassword 1
force_install_dir /opt/pzserver/
// for servers which don't need a login
login anonymous
app_update 380870 validate
quit
"

install_string="
export PATH=$PATH:/usr/games
steamcmd +runscript /home/pzserver/update_zomboid.txt
"

echo "$string" | sudo tee /home/pzserver/update_zomboid.txt
echo "$install_string" | sudo tee /home/pzserver/install_zomboid.sh
sudo chmod +x /home/pzserver/install_zomboid.sh

# Required Ports for Steam
# The following are ports you need to have open on your router or firewall for Steam to operate normally.
# 
# 
# To log into Steam and download content:
# 
#     HTTP (TCP remote port 80) and HTTPS (443)
#     UDP remote port 27015-27050
#     TCP remote port 27015-27050
# 
# 
# Steam Client
# 
#     UDP remote port 27000-27100: Game traffic
#     UDP local port 27031-27036: Remote Play
#     TCP local port 27036: Remote Play
#     UDP remote port 4380
# 
# Dedicated or Listen Servers
# 
#     TCP local port 27015 (default): SRCDS Rcon port
#     UDP local port 27015 (default): gameplay traffic
# 
# Steamworks P2P Networking and Steam Voice Chat
# 
#     UDP remote port 3478
#     UDP remote port 4379
#     UDP remote port 4380
#     UDP remote ports: 27014-27030

if command -v ufw &> /dev/null; then
    echo "The following UFW rules will be added:"
    echo "sudo ufw allow 16261/udp # zomboid server"
    echo "sudo ufw allow 16262/udp # zomboid server"
    echo "sudo ufw allow 27015 # steam server"
    sudo ufw allow 16261/udp # zomboid server
    sudo ufw allow 16262/udp # zomboid server
    sudo ufw allow 27015 # steam server
fi

echo "Now please switch to the pzserver user and run the install script:
---
# Switch to pzserver user
sudo su pzserver
---
# Install Zomboid Server
cd
bash install_zomboid.sh
---
# Start Zomboid Server
cd /opt/pzserver
bash start-server.sh
"

rm ~/.steam/steamcmd ~/.local/share/Steam/steamcmd ~/Steam/steamcmd -rf