// Copyright (c) 2026 Storm Dragon
// Authors: Storm Dragon, Angus Kola
// SPDX-License-Identifier: GPL-3.0-or-later

// Package session keeps desktop session policy independent of native backends.
package session

import (
	"os"
	"strings"
)

// Wayland respects an explicit session type; WAYLAND_DISPLAY is a fallback for
// launchers that do not set XDG_SESSION_TYPE.
func Wayland() bool {
	kind := strings.ToLower(strings.TrimSpace(os.Getenv("XDG_SESSION_TYPE")))
	if kind != "" {
		return kind == "wayland"
	}
	return strings.TrimSpace(os.Getenv("WAYLAND_DISPLAY")) != ""
}

// GTKEnvironment preserves Xorg focus correlation in explicit X11 sessions.
// Elsewhere GTK inherits the user's backend choice and selects its own default.
func GTKEnvironment() []string {
	environment := os.Environ()
	if strings.EqualFold(strings.TrimSpace(os.Getenv("XDG_SESSION_TYPE")), "x11") {
		environment = append(environment, "GDK_BACKEND=x11")
	}
	return environment
}