#!/bin/bash

# Get parameters function
# This function will check all the parameters 
# Return:
#   string: params to run the server
#   int: -1 is something is wrong.

getparams() {
    # Basic + default params values:
    #   -nographics: basic param for the valheim documentation. MANDATORY.
    #   -batchmode: bacic param for the valheim documentation. MANDATORY.
    #   -public: used the value of the param if defined, if not it will be a private server (0) MANDATORY.
    #   -port: used the value of the param if defined, if not it will use standard port (2456) MANDATORY.
    params="-nographics -batchmode"
    params="$params -public ${PUBLIC:-0}"
    params="$params -port ${PORT:-2456}"

    # Specific params values, if they are not defined, return error:
    ## Name of the server MANDATORY:
    if [[ -z "${NAME}" ]]; then
        echo "The variable NAME is not defined. Please, fix and run again."
        return -1
    else
        params="$params -name \"${NAME}\""
    fi

    ## Name of the world MANDATORY
    if [[ -z "${WORLD}" ]]; then
        echo "The variable WORLD is not defined. Fixed and run again."
        return -1
    else
        params="$params -world \"${WORLD}\""
    fi

    ## Save folder for the data (if not defined can run, but the world will be saved on the container, bad idea):
    if [[ -z "${SAVEDIR}" ]]; then
        echo "The variable SAVEDIR is not defined. Fixed and run again."
        return -1
    else
        params="$params -savedir \"${SAVEDIR}\""
    fi

    ## Password for the server, if not defined, no password = free access:
    if [[ -z "${PASSWORD}" ]]; then
        echo "The variable PASSWORD is not defined. Running WITHOUT password."
    else
        params="$params -password \"${PASSWORD}\""
    fi
}

# Main function
main() {
    # Basic export for the BOX64 emulator
    echo "##############################"
    echo "Basic variables running box64:"
    echo "BOX64_LD_LIBRARY_PATH: ${BOX64_LD_LIBRARY_PATH}"
    echo "BOX64_LOG: ${BOX64_LOG}"
    echo "BOX64_TRACE_FILE: ${BOX64_TRACE_FILE}"
    echo "BOX64_TRACE: ${BOX64_TRACE}"
    echo "##############################"

    # Part of the standar code startup of the server:
    export templdpath="${LD_LIBRARY_PATH}"
    export LD_LIBRARY_PATH=./linux64:"${LD_LIBRARY_PATH}"
    export SteamAppId=${STEAMAPPID}
    
    # Move to the execution folder
    cd /root/valheim_server

    ## Checking the final parameters to use:
    echo "Final Valheim parameters to run: $params"

    # Starting the server:
    box64 ./valheim_server.x86_64 $params
}

getparams
main