#!/bin/sh

# use for debug only.
# set -x

ULWGL_PROTON_VER="ULWGL-Proton-8.0-5-3"
ULWGL_LAUNCHER_VER="0.1-RC3"

me="$(readlink -f "$0")"

ulwgl_link="https://github.com/Open-Wine-Components/ULWGL-launcher/releases/download/$ULWGL_LAUNCHER_VER/ULWGL-launcher.tar.gz"
ulwgl_dir="$HOME"/.local/share/ULWGL

proton_link="https://github.com/Open-Wine-Components/ULWGL-Proton/releases/download/$ULWGL_PROTON_VER/$ULWGL_PROTON_VER"
proton_dir="$HOME"/.local/share/Steam/compatibilitytools.d

ulwgl_cache="$HOME"/.cache/ULWGL

if [ ! -d "$ulwgl_cache" ]; then
	mkdir -p "$ulwgl_cache"
fi

# Self-update
# In flatpak it will check for /app/share/ULWGL/ULWGL-launcher.tar.gz and check version
# In distro package it will check for /usr/share/ULWGL/ULWGL-launcher.tar.gz and check version
# If tarball does not exist it will just download it.
if [ ! -d "$ulwgl_dir" ]; then
	mkdir -p "$ulwgl_dir"
  if [ -f "${me%/*/*}"/share/ULWGL/ULWGL-launcher.tar.gz ]; then
    tar -zxvf "${me%/*/*}"/share/ULWGL/ULWGL-launcher.tar.gz --one-top-level="$ulwgl_dir"
  else
    wget "$ulwgl_link" -O "$ulwgl_cache/ULWGL-launcher.tar.gz"
    tar -zxvf "$ulwgl_cache/ULWGL-launcher.tar.gz" --one-top-level="$ulwgl_dir"
    rm "$ulwgl_cache/ULWGL-launcher.tar.gz"
  fi
else
    if [ "$ULWGL_LAUNCHER_VER" != "$(cat "$ulwgl_dir"/ULWGL-VERSION)" ]; then
      rm -Rf "$ulwgl_dir" --preserve-root=all
      if [ -f "${me%/*/*}"/share/ULWGL/ULWGL-launcher.tar.gz ]; then
        tar -zxvf "${me%/*/*}"/share/ULWGL/ULWGL-launcher.tar.gz --one-top-level="$ulwgl_dir"
      else
    		wget "$ulwgl_link" -O "$ulwgl_cache/ULWGL-launcher.tar.gz"
        tar -zxvf "$ulwgl_cache/ULWGL-launcher.tar.gz" --one-top-level="$ulwgl_dir"
        rm "$ulwgl_cache/ULWGL-launcher.tar.gz"
      fi
    fi
fi

if [ -z "$PROTONPATH" ]; then
  if [ ! -d "$proton_dir"/$ULWGL_PROTON_VER ]; then
    wget "$proton_link".tar.gz -O "$ulwgl_cache/$ULWGL_PROTON_VER".tar.gz
    wget "$proton_link".sha512sum -O "$ulwgl_cache/$ULWGL_PROTON_VER".sha512sum
    cd "$ulwgl_cache" || exit
    checksum=$(sha512sum "$ULWGL_PROTON_VER".tar.gz)
    cd - || exit
    if [ "$checksum" = "$(cat "$ulwgl_cache/$ULWGL_PROTON_VER".sha512sum)" ]; then
      tar -zxvf "$ulwgl_cache/$ULWGL_PROTON_VER".tar.gz --one-top-level="$proton_dir"
      rm "$ulwgl_cache/$ULWGL_PROTON_VER".tar.gz
      rm "$ulwgl_cache/$ULWGL_PROTON_VER".sha512sum
    else
      echo "ERROR: $ulwgl_cache/$ULWGL_PROTON_VER.tar.gz checksum does not match $ulwgl_cache/$ULWGL_PROTON_VER.sha512sum, aborting!"
      rm "$ulwgl_cache/$ULWGL_PROTON_VER".tar.gz
      rm "$ulwgl_cache/$ULWGL_PROTON_VER".sha512sum
      exit 1
    fi
  fi
  export PROTONPATH="$proton_dir/$ULWGL_PROTON_VER"
else
  export PROTONPATH="$PROTONPATH"
fi

"$ulwgl_dir/ulwgl-run" "$@"