import sys
from typing import Optional

import constants
from aboutdialog import AboutDialog
from raven.mainwindow import MainWindow
from raven.pluginbase import PluginBase
from raven.pluginregistry import PluginRegistry
from raven.plugins.domain.menucontribution import MenuContribution
from raven.plugins.domain.raction import RAction


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

    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"),
            MenuContribution("help", action=self._action_about(), action_id="open about dialog"),
        ]

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

    def create_tab(self, file: str):
        self.main_window.tabs.create_tab(file)
        PluginRegistry.execute("after_open_file", file)

    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