import ctypes
from PySide6.QtCore import QSettings, Signal, QObject
from PySide6.QtWidgets import QMessageBox

def set_dark_title_bar(hwnd, enable=True):
    """Включает тёмный заголовок окна в Windows 10+."""
    DWMWA_USE_IMMERSIVE_DARK_MODE = 20
    value = ctypes.c_int(1 if enable else 0)
    ctypes.windll.dwmapi.DwmSetWindowAttribute(
        hwnd,
        DWMWA_USE_IMMERSIVE_DARK_MODE,
        ctypes.byref(value),
        ctypes.sizeof(value)
    )

class ThemeManager(QObject):
    theme_changed = Signal(str)

    def __init__(self):
        super().__init__()
        self.settings = QSettings("yobble_messenger", "Theme")
        self.theme = self.settings.value("theme", "dark")

    def get_theme(self):
        return self.theme

    def is_dark(self):
        return self.theme == "dark"

    def set_theme(self, theme: str):
        if theme in ("dark", "light"):
            self.theme = theme
            self.settings.setValue("theme", theme)
            self.theme_changed.emit(self.theme)

    def toggle_theme(self):
        """Переключает тему между светлой и темной."""
        new_theme = "light" if self.is_dark() else "dark"
        self.set_theme(new_theme)

# Глобальный экземпляр
theme_manager = ThemeManager()