from PyQt6.QtWidgets import QMainWindow, QTabWidget, QMessageBox
from gui.tabs.accounts.account_tab import AccountTab
from gui.tabs.products.product_tab import ProductTab
from gui.tabs.import_tab import ImportTab
from gui.tabs.listeds.listed_tab import ListedTab
from gui.tabs.settings.settings_tab import SettingsTab
from gui.core.login_handle_dialog import LoginHandleDialog
from stores.shared_store import SharedStore
from tasks.listed_tasks import start_background_listed
from gui.global_signals import global_signals


class MainWindow(QMainWindow):
    def __init__(self):
        super().__init__()
        self.setWindowTitle("Facebook Marketplace Manager")
        self.resize(1200, 600)

        # --- Tabs ---
        self.tabs = QTabWidget()
        self.account_tab = AccountTab()
        self.product_tab = ProductTab()
        self.import_tab = ImportTab()
        self.listed_tab = ListedTab()
        self.setting_tab = SettingsTab()

        self.tabs.addTab(self.account_tab, "Accounts")
        self.tabs.addTab(self.product_tab, "Products")
        self.tabs.addTab(self.listed_tab, "Queue Handle")
        self.tabs.addTab(self.import_tab, "Import Data")
        self.tabs.addTab(self.setting_tab, "Setting")

        self.tabs.currentChanged.connect(self.on_tab_changed)
        self.setCentralWidget(self.tabs)
        self.on_tab_changed(0)

        # --- Signals ---
        # global_signals.listed_finished.connect(self.on_listed_task_finished)
        # global_signals.dialog_finished.connect(self.on_dialog_finished)
        # global_signals.open_login_dialog.connect(self.show_login_dialog)

        # --- Background tasks ---
        # start_background_listed()

        # --- Store opened dialogs ---
        self.login_dialogs = []

    # ----------------------------------------------------------------------
    def show_login_dialog(self, account_id: int, listed_id: int):
        """Hiển thị dialog xử lý login (modeless)"""
        print(f"[INFO] Open LoginHandleDialog for acc={account_id}, listed={listed_id}")
        dialog = LoginHandleDialog(account_id=account_id, listed_id=listed_id)
        dialog.setParent(self)  # đảm bảo dialog đóng theo MainWindow
        dialog.show()
        self.login_dialogs.append(dialog)

        # Cleanup khi dialog đóng
        dialog.finished.connect(
            lambda: self._on_dialog_closed(dialog, account_id, listed_id)
        )

    # ----------------------------------------------------------------------
    def _on_dialog_closed(self, dialog, account_id, listed_id):
        """Xử lý khi dialog đóng"""
        if dialog in self.login_dialogs:
            self.login_dialogs.remove(dialog)
        self.on_dialog_finished(account_id, listed_id)

    # ----------------------------------------------------------------------
    def on_dialog_finished(self, account_id, listed_id):
        """Khi dialog xử lý xong"""
        store = SharedStore.get_instance()
        store.remove(listed_id)

    # ----------------------------------------------------------------------
    def on_tab_changed(self, index: int):
        """Lazy-load dữ liệu khi đổi tab"""
        tab = self.tabs.widget(index)
        if hasattr(tab, "load_data") and not getattr(tab, "is_loaded", False):
            tab.load_data()
            tab.is_loaded = True

    # ----------------------------------------------------------------------
    def on_listed_task_finished(self):
        """Khi task nền hoàn tất"""
        QMessageBox.information(
            self, "Auto Listing", "All pending listed items have been processed!"
        )

    # ----------------------------------------------------------------------
    def closeEvent(self, event):
        """Khi đóng MainWindow -> đóng hết dialog con"""
        for dialog in self.login_dialogs[:]:  # copy để tránh modify khi lặp
            dialog.close()
        event.accept()