from PyQt6.QtWidgets import QApplication, QMainWindow
from PyQt6.QtGui import QIcon, QResizeEvent, QCloseEvent
from PyQt6.QtCore import QSize, QEvent
from app.core.main_manager import MainManager, NotificationType
from app.ui.widgets.tabs_widget import TabsWidget, MenuDirection, ButtonPosition, BorderSide
from app.ui.windows.settings_window import SettingsWindow
from app.ui.windows.suggestion_window import SuggestionWindow
import app.utils.paths as paths
from typing import Optional

class MainWindow(QMainWindow):
    def __init__(self) -> None:
        super().__init__()

        self.main_manager: MainManager = MainManager.get_instance()
        
        self.language_manager = self.main_manager.get_language_manager()
        self.theme_manager = self.main_manager.get_theme_manager()
        self.settings_manager = self.main_manager.get_settings_manager()
        self.observer_manager = self.main_manager.get_observer_manager()
        self.observer_manager.subscribe(NotificationType.THEME, self.update_theme)

        self.is_maximizing: bool = False
        self.current_size: QSize
        self.previous_size: QSize
        
        # UI elements
        self.side_menu: TabsWidget
        self.settings_window: SettingsWindow
        self.suggestion_window: SuggestionWindow
        
        app: Optional[QApplication] = QApplication.instance()
        size: QSize = app.primaryScreen().size()
        self.settings_manager.minScreenSize = min(size.height(),size.width())
        
        self.setMinimumSize(600, 400)
        self.setup_ui()
        self.apply_saved_window_state()

    def apply_saved_window_state(self) -> None:
        """Apply saved window size and maximized state"""
        window_size: dict = self.settings_manager.get_window_size()
        self.current_size = QSize(window_size["width"], window_size["height"])
        self.previous_size = QSize(window_size["width"], window_size["height"])
        self.resize(self.current_size)
        if self.settings_manager.get_maximized():
            self.is_maximizing = True
            self.showMaximized()

    def changeEvent(self, event: QEvent) -> None:
        """Handle window state changes"""
        super().changeEvent(event)
        if event.type() == event.Type.WindowStateChange:
            if self.isMaximized():
                # On vient de maximiser
                self.is_maximizing = False
            else:
                # On vient de dé-maximiser, restaurer la taille précédente
                if hasattr(self, 'previous_size'):
                    self.current_size = self.previous_size
            self.settings_manager.set_maximized(self.isMaximized())

    def resizeEvent(self, a0: QResizeEvent) -> None:
        # Ne pas sauvegarder la taille si on est en train de maximiser
        if not self.isMaximized() and not self.is_maximizing:
            self.previous_size = self.current_size
            self.current_size = self.size()

    def closeEvent(self, event: QCloseEvent) -> None:
        """Handle application close event"""
        super().closeEvent(event)
        # si la difference de taille est plus grande que 10 pixels, enregistrer previoussize
        if abs(self.current_size.width() - self.previous_size.width()) > 10 or abs(self.current_size.height() - self.previous_size.height()) > 10:
            self.current_size = self.previous_size
        self.settings_manager.set_window_size(
            self.current_size.width(),
            self.current_size.height()
        )

    def setup_ui(self) -> None:
        self.side_menu = TabsWidget(self,MenuDirection.HORIZONTAL,70,None,10,1,BorderSide.TOP)

        self.settings_window = SettingsWindow(self)
        self.side_menu.add_widget(self.settings_window,"",paths.get_asset_svg_path("settings"), position=ButtonPosition.CENTER)
        
        self.suggestion_window = SuggestionWindow(self)
        self.side_menu.add_widget(self.suggestion_window,"",paths.get_asset_svg_path("suggestion"), position=ButtonPosition.CENTER)
        
        self.setCentralWidget(self.side_menu)

    def update_theme(self) -> None:
        self.setStyleSheet(self.theme_manager.get_sheet())