#!/bin/bash

# use for debug only.
# set -x

if [[ -z $1 ]] || [[ -z $WINEPREFIX ]] || [[ -z $GAMEID ]]; then
 echo 'Usage: WINEPREFIX=<wine-prefix-path> GAMEID=<ulwgl-id> PROTONPATH=<proton-version-path> ./gamelauncher.sh <executable-path> <arguments>'
 echo 'Ex:'
 echo 'WINEPREFIX=$HOME/Games/epic-games-store GAMEID=egs PROTONPATH="$HOME/.steam/steam/compatibilitytools.d/GE-Proton8-28" ./gamelauncher.sh "$HOME/Games/epic-games-store/drive_c/Program Files (x86)/Epic Games/Launcher/Portal/Binaries/Win32/EpicGamesLauncher.exe" "-opengl -SkipBuildPatchPrereq"'
 exit 1
fi

ULWGL_PROTON_VER="ULWGL-Proton-8.0-5"
ULWGL_LAUNCHER_VER="0.1-RC2"

me="$(readlink -f "$0")"
#here="${me%/*}"

# This is how we update on flatpak. For distro packages it will be similar -- tarball placed in /usr/share which auto-extracts to the user's ~/.local/share/ULWGL/
if [[ ! -d "$HOME"/.local/share/ULWGL/ ]]; then
  tar -zxvf ${me%/*/*}/share/ULWGL/ULWGL-launcher.tar.gz --one-top-level="$HOME"/.local/share/ULWGL
else
    if [[ "$ULWGL_LAUNCHER_VER" != $(cat "$HOME"/.local/share/ULWGL/ULWGL-VERSION) ]]; then
      rm -Rf "$HOME"/.local/share/ULWGL/
      tar -zxvf ${me%/*/*}/share/ULWGL/ULWGL-launcher.tar.gz --one-top-level="$HOME"/.local/share/ULWGL
    fi
fi

if [[ $WINEPREFIX ]]; then
   if [[ ! -d "$WINEPREFIX" ]]; then
     mkdir -p "$WINEPREFIX"
     export PROTON_DLL_COPY="*"
   fi
   if [[ ! -d "$WINEPREFIX"/pfx ]]; then
     ln -s "$WINEPREFIX" "$WINEPREFIX"/pfx &> /dev/null
   fi
   if [[ ! -f "$WINEPREFIX"/tracked_files ]]; then
     touch "$WINEPREFIX"/tracked_files
   fi
   if [[ ! -f "$WINEPREFIX/dosdevices/" ]]; then
     mkdir -p "$WINEPREFIX"/dosdevices
     ln -s "../drive_c" "$WINEPREFIX/dosdevices/c:" &> /dev/null
   fi
fi
if [[ -n $PROTONPATH ]]; then
  if [[ ! -d $PROTONPATH ]]; then
    echo "ERROR: $PROTONPATH is invalid, aborting!"    exit 1
    exit 1
  fi
fi
if [[ -z $PROTONPATH ]]; then
  if [[ ! -d "$HOME"/.local/share/Steam/compatibilitytools.d/$ULWGL_PROTON_VER ]]; then
    wget https://github.com/Open-Wine-Components/ULWGL-Proton/releases/download/$ULWGL_PROTON_VER/$ULWGL_PROTON_VER.tar.gz
    wget https://github.com/Open-Wine-Components/ULWGL-Proton/releases/download/$ULWGL_PROTON_VER/$ULWGL_PROTON_VER.sha512sum
    checksum=$(sha512sum $ULWGL_PROTON_VER.tar.gz)
    if [[ "$checksum" == $(cat $ULWGL_PROTON_VER.sha512sum) ]]; then
      tar -zxvf $ULWGL_PROTON_VER.tar.gz --one-top-level="$HOME"/.local/share/Steam/compatibilitytools.d/
      rm $ULWGL_PROTON_VER.tar.gz
      rm $ULWGL_PROTON_VER.sha512sum
    else
      echo "ERROR: $ULWGL_PROTON_VER.tar.gz checksum does not match $ULWGL_PROTON_VER.sha512sum, aborting!"
      rm $ULWGL_PROTON_VER.tar.gz
      rm $ULWGL_PROTON_VER.sha512sum
      exit 1
    fi
  fi
  PROTONPATH="$HOME"/.local/share/Steam/compatibilitytools.d/$ULWGL_PROTON_VER
else
  export PROTONPATH="$PROTONPATH"
fi
export ULWGL_ID="$GAMEID"
export STEAM_COMPAT_APP_ID="0"
numcheck='^[0-9]+$'
if [[ $(echo $ULWGL_ID | cut -d "-" -f 2) =~ $numcheck ]]; then
  export STEAM_COMPAT_APP_ID=$(echo $ULWGL_ID | cut -d "-" -f 2)
fi
export SteamAppId="$STEAM_COMPAT_APP_ID"
export SteamGameId="$STEAM_COMPAT_APP_ID"

# TODO: Ideally this should be the main game install path, which is often, but not always the path of the game's executable.
if [[ -z $STEAM_COMPAT_INSTALL_PATH ]]; then
  exepath="$(readlink -f "$1")"
  gameinstallpath="${exepath%/*}"
  export STEAM_COMPAT_INSTALL_PATH="$gameinstallpath"
fi

compat_lib_path=$(findmnt -T "$STEAM_COMPAT_INSTALL_PATH" | tail -n 1 | awk '{ print $1 }')
if [ "$compat_lib_path" != "/" ]; then
    export STEAM_COMPAT_LIBRARY_PATHS="${STEAM_COMPAT_LIBRARY_PATHS:+"${STEAM_COMPAT_LIBRARY_PATHS}:"}$compat_lib_path"
fi

if [[ -z $STEAM_RUNTIME_LIBRARY_PATH ]]; then
  # The following info taken from steam ~/.local/share/ubuntu12_32/steam-runtime/run.sh
  host_library_paths=
  exit_status=0
  ldconfig_output=$(/sbin/ldconfig -XNv 2> /dev/null; exit $?) || exit_status=$?
  if [[ $exit_status != 0 ]]; then
      echo "Warning: An unexpected error occurred while executing \"/sbin/ldconfig -XNv\", the exit status was $exit_status"
  fi

  while read -r line; do
    # If line starts with a leading / and contains :, it's a new path prefix
    if [[ "$line" =~ ^/.*: ]]
    then
        library_path_prefix=$(echo "$line" | cut -d: -f1)

        host_library_paths=$host_library_paths$library_path_prefix:
    fi
  done <<< "$ldconfig_output"

  host_library_paths="${LD_LIBRARY_PATH:+"${LD_LIBRARY_PATH}:"}$host_library_paths"
  steam_runtime_library_paths="${STEAM_COMPAT_INSTALL_PATH}:${host_library_paths}"
  export STEAM_RUNTIME_LIBRARY_PATH="$steam_runtime_library_paths"
fi

if [[ -z $PROTON_VERB ]]; then
  export PROTON_VERB="waitforexitandrun"
fi

export STEAM_COMPAT_CLIENT_INSTALL_PATH=''
export STEAM_COMPAT_DATA_PATH="$WINEPREFIX"
export STEAM_COMPAT_SHADER_PATH="$STEAM_COMPAT_DATA_PATH"/shadercache

export PROTON_CRASH_REPORT_DIR='/tmp/ULWGL_crashreports'
export FONTCONFIG_PATH=''

export EXE="$1"
if [[ "$EXE" == "createprefix"  ]]; then
	# Hack, leave empty.
	# forces proton to create a prefix without actually running anything.
	EXE=""
fi
shift 1

export STEAM_COMPAT_TOOL_PATHS="$PROTONPATH:$here"
export STEAM_COMPAT_MOUNTS="$PROTONPATH:$here"

"$HOME"/.local/share/ULWGL/ULWGL "--verb=$PROTON_VERB" -- "$PROTONPATH"/proton "$PROTON_VERB" "$EXE" "$@"