#!/bin/bash

set -eo pipefail

VOLUME_HOME="/home/steam/volumes"

#
# STEAM/INSTALL GAME
#

# If STEAM_USER or STEAM_PASSWORD is not set
if [ -z "$STEAM_USER" ] || [ -z "$STEAM_PASSWORD" ]; then
    echo "STEAM_USER or STEAM_PASSWORD is not set. Its recommended to create a new steam user for the server."
    exit 1
fi

# Update or install Arma 3
echo "Updating or installing Arma 3..."

# https://developer.valvesoftware.com/wiki/SteamCMD
/home/steam/steamcmd/steamcmd.sh +force_install_dir /home/steam/server +login "$STEAM_USER" "$STEAM_PASSWORD" +app_update 233780 +quit

#
# PREPARE GAME
#

# Check if config file exists
if [ ! -f "$VOLUME_HOME/config/config.cfg" ]; then
    echo "Config file not found, creating..."
    # TODO: Create config file
    touch "$VOLUME_HOME/config/config.cfg"
fi

# https://community.bistudio.com/wiki/Arma_3:_Startup_Parameters#Server_Options
SERVER_ARGS="-name server -config=$VOLUME_HOME/config/config.cfg -profiles=$VOLUME_HOME/config/profiles"

if [ -n "$LIMIT_FPS" ]; then
    SERVER_ARGS="${SERVER_ARGS} -limitFPS=${LIMIT_FPS}"
fi

if [ -n "$PORT" ]; then
    SERVER_ARGS="${SERVER_ARGS} -port=${PORT}"
fi

#
# PREAPRE MODS
# 

MOD_LINK_DIR="/home/steam/server/mods"
mkdir -p "$MOD_LINK_DIR"
rm -f "$MOD_LINK_DIR"/*

MODS_TO_LOAD=""

for mod_id in $(curl -s "https://steamcommunity.com/sharedfiles/filedetails/?id=$WORKSHOP_COLLECTION" | grep -E 'id="sharedfile_[0-9]+"' | sed 's/.*id="sharedfile_\([0-9]\+\)".*/\1/')
do
    # Check if directory exists
    if [ ! -d "$VOLUME_HOME/mods/$mod_id" ]; then
        echo "Could not find mod directory for $mod_id"
        echo "Try to download it first"
        exit 1
    fi

    ln -s "$VOLUME_HOME/mods/$mod_id" "$MOD_LINK_DIR/$mod_id"
    MODS_TO_LOAD="${MODS_TO_LOAD}mods/${mod_id};"
done

if [ -n "$MODS_TO_LOAD" ]; then
    SERVER_ARGS="${SERVER_ARGS} -mod=${MODS_TO_LOAD::-1}"
fi

#
# LINK MISSIONS
#

rm -r /home/steam/server/mpmissions
ln -s "$VOLUME_HOME/missions" "/home/steam/server/mpmissions"

# SERVER_ARGS="${SERVER_ARGS} -serverMod=${SERVER_MODS}"

#
# RUN GAME
#


echo "Starting server with args: "
echo "$SERVER_ARGS"

# Start the server
echo "Starting the server..."
/home/steam/server/arma3server_x64 ${SERVER_ARGS}