#!/bin/bash --posix



set +e

usage() {
  printf "%s\n" \
    "Usage: $(basename "${0}") -u <steam username> -s <server number> -w <workshop id> -m <mod name>
  --user <string> | -u <string>
    Example:
      --user Sbinalla
  --server <int> | -s <int>
    Example:
      --server 0
  --workshop-id <int> | -w <int>
    Example:
      --workshop-id 450814997
    Note:
      All mod names are converted to lowercase, Arma 3 requires lowercase mod names for linux."
}

error() {
  printf "\n%s\n" "$1" >&2
  exit 1
}

confirmation() {
  local choice
  while true; do
    read -p "${1}" -n 1 -r choice
    case "${choice}" in
      y | Y)
        echo ""
        return 1
        ;;
      n | N)
        echo ""
        return 0
        ;;
      *) echo -e "\nInput must be either y, Y, n, or N" ;;
    esac
  done
}

## Variable setup
SERVERNUM=""
STEAMUSER=""
WORKSHOPID=""
#MODNAME=""

# Arg parsing is done here
while :; do
  case $1 in
    -h | -\? | --help)
      usage # Display a usage synopsis.
      exit
      ;;
    --) # End of all options.
      shift
      break
      ;;
    -s | --server)
      shift
      SERVERNUM="${1}"
      ;;
    -u | --user)
      shift
      STEAMUSER="${1}"
      ;;
    -w | --workshop-id)
      shift
      WORKSHOPID="${1}"
      ;;
#    -m | --mod-name)
#      shift
#      MODNAME="${1}"
#      ;;
    -?*)
      printf 'Unknown option: %s\n' "$1" >&2
      usage
      error
      ;;
    *) # Default case: No more options, so break out of the loop.
      break ;;
  esac
  shift
done

## Next chunk is checks to see that variables are passed and match correct arguments etc.
[[ "${SERVERNUM}" == "" ]] && error "Error: A server number must be provided"
[[ "${SERVERNUM}" =~ [^0-9]+. ]] && error "Error: The argument for server must be a number"

[[ "${STEAMUSER}" == "" ]] && error "Error: A steam user must be provided"

[[ "${WORKSHOPID}" == "" ]] && error "Error: An argument for workshop-id must be provided"
[[ "${WORKSHOPID}" =~ [^0-9]+. ]] && error "Error: The argument for workshop-id must be a number"

#[[ "${MODNAME}" == "" ]] && error "Error: An argument for mod-name must be provided"

[[ -d ~/Arma/Server-"${SERVERNUM}" ]] || error "Error: Arma Server ${SERVERNUM} does not exist!"

## Converts the modname to lowercase as Arma 3 on linux requires lowercase mod directory names
#MODNAME=$(echo "${MODNAME}" | tr '[:upper:]' '[:lower:]')
#
## Prefix mod with @
#MODNAME="@${MODNAME}"

# Create the mods directory if it doesn't exist
[[ -d ~/Arma/Server-"${SERVERNUM}"/mods ]] \
  || mkdir -p ~/Arma/Server-"${SERVERNUM}"/mods && echo "Info: Created mods directory as it did not exist"

echo "Info: Downloading mod ${WORKSHOPID}"
# Download the mod
steamcmd +login "${STEAMUSER}" +force_install_dir ~/Arma/Server-"${SERVERNUM}" +workshop_download_item 107410 "${WORKSHOPID}" validate +quit \
  && echo && echo "Info: Finished Downloading mod"

# Finally install the mod into the mods directory
echo "Info: Installing the mod ${WORKSHOPID}"
[[ -d  "${HOME}/Arma/Server-${SERVERNUM}/mods/${WORKSHOPID}" ]] && rm -rf "${HOME}/Arma/Server-${SERVERNUM}/mods/${WORKSHOPID}"
[[ -d ~/Arma/Server-"${SERVERNUM}"/mods/"${WORKSHOPID}" ]] \
  || mkdir -p ~/Arma/Server-"${SERVERNUM}"/mods/"${WORKSHOPID}" \
    && echo "Info: Created the ${WORKSHOPID} directory within mods"
mv "${HOME}/Arma/Server-${SERVERNUM}/steamapps/workshop/content/107410/${WORKSHOPID}"/* "${HOME}/Arma/Server-${SERVERNUM}/mods/${WORKSHOPID}"


bikey_location=$(find ~/Arma/Server-"${SERVERNUM}"/mods/"${WORKSHOPID}"/ -name "*.bikey")
[[ -z "${bikey_location}" ]] || cp -f "${bikey_location}" "${HOME}/Arma/Server-${SERVERNUM}/keys/$(basename "${bikey_location}")"



echo "Info: Successfully installed the mod ${WORKSHOPID} to Server-${SERVERNUM}"