from abc import abstractmethod

from openpype import resources

from openpype.modules import OpenPypeInterface


class IPluginPaths(OpenPypeInterface):
    """Module has plugin paths to return.

    Expected result is dictionary with keys "publish", "create", "load" or
    "actions" and values as list or string.
    {
        "publish": ["path/to/publish_plugins"]
    }
    """

    @abstractmethod
    def get_plugin_paths(self):
        pass

    def get_creator_plugin_paths(self, host_name):
        """Retreive creator plugin paths.

        Give addons ability to add creator plugin paths based on host name.

        NOTES:
        - Default implementation uses 'get_plugin_paths' and always return
            all creator plugins.
        - Host name may help to organize plugins by host, but each creator
            alsomay have host filtering.

        Args:
            host_name (str): For which host are the plugins meant.
        """

        paths = self.get_plugin_paths()
        if not paths or "create" not in paths:
            return []

        create_paths = paths["create"]
        if not create_paths:
            return []

        if not isinstance(create_paths, (list, tuple, set)):
            create_paths = [create_paths]
        return create_paths


class ILaunchHookPaths(OpenPypeInterface):
    """Module has launch hook paths to return.

    Expected result is list of paths.
    ["path/to/launch_hooks_dir"]
    """

    @abstractmethod
    def get_launch_hook_paths(self):
        pass


class ITrayModule(OpenPypeInterface):
    """Module has special procedures when used in Pype Tray.

    IMPORTANT:
    The module still must be usable if is not used in tray even if
    would do nothing.
    """
    tray_initialized = False
    _tray_manager = None

    @abstractmethod
    def tray_init(self):
        """Initialization part of tray implementation.

        Triggered between `initialization` and `connect_with_modules`.

        This is where GUIs should be loaded or tray specific parts should be
        prepared.
        """
        pass

    @abstractmethod
    def tray_menu(self, tray_menu):
        """Add module's action to tray menu."""
        pass

    @abstractmethod
    def tray_start(self):
        """Start procedure in Pype tray."""
        pass

    @abstractmethod
    def tray_exit(self):
        """Cleanup method which is executed on tray shutdown.

        This is place where all threads should be shut.
        """
        pass

    def execute_in_main_thread(self, callback):
        """ Pushes callback to the queue or process 'callback' on a main thread

            Some callbacks need to be processed on main thread (menu actions
            must be added on main thread or they won't get triggered etc.)
        """
        if not self.tray_initialized:
            # TODO Called without initialized tray, still main thread needed
            try:
                callback()

            except Exception:
                self.log.warning(
                    "Failed to execute {} in main thread".format(callback),
                    exc_info=True)

            return
        self.manager.tray_manager.execute_in_main_thread(callback)

    def show_tray_message(self, title, message, icon=None, msecs=None):
        """Show tray message.

        Args:
            title (str): Title of message.
            message (str): Content of message.
            icon (QSystemTrayIcon.MessageIcon): Message's icon. Default is
                Information icon, may differ by Qt version.
            msecs (int): Duration of message visibility in miliseconds.
                Default is 10000 msecs, may differ by Qt version.
        """
        if self._tray_manager:
            self._tray_manager.show_tray_message(title, message, icon, msecs)

    def add_doubleclick_callback(self, callback):
        if hasattr(self.manager, "add_doubleclick_callback"):
            self.manager.add_doubleclick_callback(self, callback)


class ITrayAction(ITrayModule):
    """Implementation of Tray action.

    Add action to tray menu which will trigger `on_action_trigger`.
    It is expected to be used for showing tools.

    Methods `tray_start`, `tray_exit` and `connect_with_modules` are overridden
    as it's not expected that action will use them. But it is possible if
    necessary.
    """

    admin_action = False
    _admin_submenu = None
    _action_item = None

    @property
    @abstractmethod
    def label(self):
        """Service label showed in menu."""
        pass

    @abstractmethod
    def on_action_trigger(self):
        """What happens on actions click."""
        pass

    def tray_menu(self, tray_menu):
        from Qt import QtWidgets

        if self.admin_action:
            menu = self.admin_submenu(tray_menu)
            action = QtWidgets.QAction(self.label, menu)
            menu.addAction(action)
            if not menu.menuAction().isVisible():
                menu.menuAction().setVisible(True)

        else:
            action = QtWidgets.QAction(self.label, tray_menu)
            tray_menu.addAction(action)

        action.triggered.connect(self.on_action_trigger)
        self._action_item = action

    def tray_start(self):
        return

    def tray_exit(self):
        return

    @staticmethod
    def admin_submenu(tray_menu):
        if ITrayAction._admin_submenu is None:
            from Qt import QtWidgets

            admin_submenu = QtWidgets.QMenu("Admin", tray_menu)
            admin_submenu.menuAction().setVisible(False)
            ITrayAction._admin_submenu = admin_submenu
        return ITrayAction._admin_submenu


class ITrayService(ITrayModule):
    # Module's property
    menu_action = None

    # Class properties
    _services_submenu = None
    _icon_failed = None
    _icon_running = None
    _icon_idle = None

    @property
    @abstractmethod
    def label(self):
        """Service label showed in menu."""
        pass

    # TODO be able to get any sort of information to show/print
    # @abstractmethod
    # def get_service_info(self):
    #     pass

    @staticmethod
    def services_submenu(tray_menu):
        if ITrayService._services_submenu is None:
            from Qt import QtWidgets

            services_submenu = QtWidgets.QMenu("Services", tray_menu)
            services_submenu.menuAction().setVisible(False)
            ITrayService._services_submenu = services_submenu
        return ITrayService._services_submenu

    @staticmethod
    def add_service_action(action):
        ITrayService._services_submenu.addAction(action)
        if not ITrayService._services_submenu.menuAction().isVisible():
            ITrayService._services_submenu.menuAction().setVisible(True)

    @staticmethod
    def _load_service_icons():
        from Qt import QtGui

        ITrayService._failed_icon = QtGui.QIcon(
            resources.get_resource("icons", "circle_red.png")
        )
        ITrayService._icon_running = QtGui.QIcon(
            resources.get_resource("icons", "circle_green.png")
        )
        ITrayService._icon_idle = QtGui.QIcon(
            resources.get_resource("icons", "circle_orange.png")
        )

    @staticmethod
    def get_icon_running():
        if ITrayService._icon_running is None:
            ITrayService._load_service_icons()
        return ITrayService._icon_running

    @staticmethod
    def get_icon_idle():
        if ITrayService._icon_idle is None:
            ITrayService._load_service_icons()
        return ITrayService._icon_idle

    @staticmethod
    def get_icon_failed():
        if ITrayService._failed_icon is None:
            ITrayService._load_service_icons()
        return ITrayService._failed_icon

    def tray_menu(self, tray_menu):
        from Qt import QtWidgets

        action = QtWidgets.QAction(
            self.label,
            self.services_submenu(tray_menu)
        )
        self.menu_action = action

        self.add_service_action(action)

        self.set_service_running_icon()

    def set_service_running_icon(self):
        """Change icon of an QAction to green circle."""
        if self.menu_action:
            self.menu_action.setIcon(self.get_icon_running())

    def set_service_failed_icon(self):
        """Change icon of an QAction to red circle."""
        if self.menu_action:
            self.menu_action.setIcon(self.get_icon_failed())

    def set_service_idle_icon(self):
        """Change icon of an QAction to orange circle."""
        if self.menu_action:
            self.menu_action.setIcon(self.get_icon_idle())


class ISettingsChangeListener(OpenPypeInterface):
    """Module has plugin paths to return.

    Expected result is dictionary with keys "publish", "create", "load" or
    "actions" and values as list or string.
    {
        "publish": ["path/to/publish_plugins"]
    }
    """
    @abstractmethod
    def on_system_settings_save(
        self, old_value, new_value, changes, new_value_metadata
    ):
        pass

    @abstractmethod
    def on_project_settings_save(
        self, old_value, new_value, changes, project_name, new_value_metadata
    ):
        pass

    @abstractmethod
    def on_project_anatomy_save(
        self, old_value, new_value, changes, project_name, new_value_metadata
    ):
        pass