import sys
from typing import Optional, Callable

from PySide6.QtCore import Qt
from PySide6.QtWidgets import QDockWidget

import constants
from aboutdialog import AboutDialog
from raven.mainwindow import MainWindow
from raven.pluginbase import PluginBase
from raven.plugins.domain.menucontribution import MenuContribution
from raven.plugins.domain.raction import RAction
from raven.plugins.domain.rmenu import RMenu
from raven.plugins.ravenlog.Tab import Tab
from raven.i18n import _
from settings import Settings


class RavenLogPlugin(PluginBase):
    def __init__(self):
        super(RavenLogPlugin, self).__init__()
        self.main_window = None

    def set_settings(self, settings: Settings):
        self.settings = settings

    def create_main_window(self):
        if not self.main_window:
            self.main_window = MainWindow()
        return self.main_window

    def get_menu_contributions(self) -> [MenuContribution]:
        return [
            MenuContribution("file", action=self._action_close(), action_id="close application", after="<last>"),
            MenuContribution("help", action=self._action_about(), action_id="open about dialog", after="<last>"),
            MenuContribution("settings", menu=self._sub_menu_languages(), action_id="recent files menu"),
        ]

    def _sub_menu_languages(self) -> RMenu:
        menu = RMenu(_("&Languages"))
        menu.add_action(RAction(_("&Default"), lambda: self._set_lang('')))
        menu.add_action(RAction(_("&English"), lambda: self._set_lang('en')))
        menu.add_action(RAction(_("&German"), lambda: self._set_lang('de')))
        return menu

    def _set_lang(self, lang: str):
        if (lang == ''):
            self.settings.session.remove_option('general', 'lang')
        else:
            self.settings.session.set('general', 'lang', lang)

    def current_file(self) -> Optional[str]:
        return self.main_window.tabs.current_file()

    def add_tab(self, tab: Tab):
        self.main_window.tabs.add_tab(tab)

    def add_dock(self, area: Qt.DockWidgetArea, widget: Tab):
        dock_widget = QDockWidget(widget.title, self.main_window)
        dock_widget.setWidget(widget)
        self.main_window.addDockWidget(area, dock_widget)

    def _action_about(self) -> RAction:
        about_action = RAction(
            _("&About"),
            action=lambda: AboutDialog().exec(),
            icon_file=constants.raven_icon
        )
        return about_action

    def _action_close(self) -> RAction:
        icon = "close" if sys.platform == 'win32' or sys.platform == 'cygwin' else "exit"
        close_action = RAction(_("E&xit"), action=lambda: self.main_window.destruct(), shortcut='Ctrl+X',
                               icon_from_theme=icon)
        return close_action