#!/usr/bin/env bash

gamescope_has_option() {
	if (gamescope --help 2>&1 | grep -e "$1" > /dev/null); then
		return 0
	fi

	return 1
}

# Source device quirks if exists
if [ -f /usr/share/gamescope-session-plus/device-quirks ]; then
	. /usr/share/gamescope-session-plus/device-quirks
fi

# Source user configuration from ~/.config/environment.d
set -a
for i in "${HOME}"/.config/environment.d/*.conf; do
	[[ -f "${i}" ]] && . "${i}"
done
set +a

# Gamescope parameters
: "${OUTPUT_CONNECTOR:=*,eDP-1}"
GAMESCOPE_PARAMS="--prefer-output $OUTPUT_CONNECTOR"

# Check if NVK driver is in use
if vulkaninfo 2>/dev/null | grep -i "driverName" | grep -q "NVK"; then
	# Workaround for https://gitlab.freedesktop.org/mesa/mesa/-/issues/13478
	BACKEND="sdl"
	GAMESCOPE_PARAMS+=" -f"
fi

if [ -n "$SCREEN_WIDTH" ] && [ -n "$SCREEN_HEIGHT" ]; then
	GAMESCOPE_PARAMS+=" -W $SCREEN_WIDTH -H $SCREEN_HEIGHT"
fi

if [ -n "$INTERNAL_WIDTH" ] && [ -n "$INTERNAL_HEIGHT" ] ; then
	GAMESCOPE_PARAMS+=" -w $INTERNAL_WIDTH -h $INTERNAL_HEIGHT"
fi

if [ -n "$DRM_MODE" ] ; then
	GAMESCOPE_PARAMS+=" --generate-drm-mode $DRM_MODE"
fi

if [ -n "$ORIENTATION" ] ; then
	GAMESCOPE_PARAMS+=" --force-orientation $ORIENTATION"
fi

if [ -n "$ADAPTIVE_SYNC" ]; then
	GAMESCOPE_PARAMS+=" --adaptive-sync"
fi

if [ -n "$PANEL_TYPE" ] && gamescope_has_option "--force-panel-type"; then
	GAMESCOPE_PARAMS+=" --force-panel-type $PANEL_TYPE"
fi

if [ -n "$CUSTOM_REFRESH_RATES" ] && gamescope_has_option "--custom-refresh-rates"; then
	GAMESCOPE_PARAMS+=" --custom-refresh-rates $CUSTOM_REFRESH_RATES"
fi

if [ -n "$USE_ROTATION_SHADER" ] && gamescope_has_option "--use-rotation-shader"; then
	GAMESCOPE_PARAMS+=" --use-rotation-shader $USE_ROTATION_SHADER"
fi

if [ -n "$BACKEND" ] && gamescope_has_option "--backend"; then
	GAMESCOPE_PARAMS+=" --backend $BACKEND"
fi

if [ -f "$CURSOR_FILE" ]; then
	# Use specified cursor if file exists
	GAMESCOPE_PARAMS+=" --cursor ${CURSOR_FILE}"
fi

# Prefer a specific Vulkan adapter if defined
if [ -n "$VULKAN_ADAPTER" ]; then
	GAMESCOPE_PARAMS+=" --prefer-vk-device $VULKAN_ADAPTER"
fi

# Start client application with Gamescope
gamescope $GAMESCOPE_PARAMS -- portprotonqt --fullscreen