#!/bin/bash

die()
{
        echo "$@"

	if command -v zenity > /dev/null; then
		zenity --error --text="$*"
	fi

        exit 1
}

if [[ -z "$FLATPAK_ID" ]]; then
	die "This script is only for Flatpak."
fi

if [[ "$FLATPAK_ID" == *.Compat.i386 ]]; then
	if [[ ! -e /lib/i386-linux-gnu/ld-linux.so.2 ]]; then
		source /etc/os-release

		die "Can't find 32-bit runtime extension. Try running 'flatpak install org.freedesktop.Platform.Compat.i386//$VERSION_ID'."
	fi

	if [[ ! -e /lib/i386-linux-gnu/libGL.so.1 ]]; then
		die "Can't find 32-bit OpenGL runtime extension. Try installing running appropriate GL32 extension for your system (org.freedesktop.Platform.GL32.nvidia-VERSION for NVIDIA, otherwise org.freedesktop.Platform.GL32.default)"
	fi
fi


echo "Xash3D FWGS installed as Flatpak."

# https://specifications.freedesktop.org/basedir-spec/basedir-spec-latest.html
# $XDG_DATA_HOME defines the base directory relative to which user-specific data files should be stored.
# If $XDG_DATA_HOME is either not set or empty, a default equal to $HOME/.local/share should be used.
if [[ -z "$XDG_DATA_HOME" ]]; then
        export XDG_DATA_HOME="$HOME/.local/share"
fi

if [[ -z "$XASH3D_BASEDIR" ]]; then
        export XASH3D_BASEDIR="$XDG_DATA_HOME/xash3d-fwgs/"
fi

mkdir -p "$XASH3D_BASEDIR"
cd "$XASH3D_BASEDIR" || die "Can't cd into $XASH3D_BASEDIR"
echo "XASH3D_BASEDIR is $XASH3D_BASEDIR"

if [[ -z "$XASH3D_RODIR" ]]; then
        # TODO: detect by libraryfolders.vdf and installed apps
        STEAMDIRS=" \
                $XDG_DATA_HOME/Steam/steamapps/common \
                $HOME/.var/app/com.valvesoftware.Steam/.local/share/Steam/steamapps/common \
                $HOME/.steam/steam/steamapps/common"
        HALFLIFEDIR="Half-Life"

        for i in $STEAMDIRS; do
                if [[ ! -d "$i" ]]; then
                        continue
                fi

                echo "Detected Steam library in $i, probing Half-Life..."

                if [[ ! -d "$i/$HALFLIFEDIR" ]]; then
                        continue
                fi

                echo "Detected Half-Life installation in $i/$HALFLIFEDIR..."

                export XASH3D_RODIR="$i/$HALFLIFEDIR"
                break
        done
fi
echo "XASH3D_RODIR is $XASH3D_RODIR"

if [[ -z "$XASH3D_EXTRAS_PAK1" ]]; then
        export XASH3D_EXTRAS_PAK1=/app/share/xash3d/valve/extras.pk3
fi
echo "XASH3D_EXTRAS_PAK1 is $XASH3D_EXTRAS_PAK1"

exec $DEBUGGER /app/lib32/xash3d/xash3d "$@"