import os
from pathlib import Path

from PySide6.QtWidgets import QFileDialog

from src.pluginbase import PluginBase
from src.pluginregistry import PluginRegistry
from src.plugins.domain.menucontribution import MenuContribution
from src.plugins.domain.raction import RAction
from src.plugins.domain.rmenu import RMenu
from src.settings.settings import Settings

from src.i18n import _


class OpenFilePlugin(PluginBase):
    def __init__(self):
        super(OpenFilePlugin, self).__init__()
        self.settings = None

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

    def _action_open_file(self) -> RAction:
        open_file = RAction(_("&Open..."), self._open_file_dialog, shortcut='Ctrl+O',
                            icon_file="icons/myicons/select-file.svg")
        return open_file

    def _sub_menu_recent_files(self) -> RMenu:
        self._menu_recent_files = RMenu(_("Open &Recent"))
        self._update_recent_files_menu()
        return self._menu_recent_files

    def get_menu_contributions(self) -> [MenuContribution]:
        return [
            MenuContribution("file", action=self._action_open_file(), action_id="open file"),
            MenuContribution("file", menu=self._sub_menu_recent_files(), action_id="recent files menu"),
        ]

    def _open_file_dialog(self) -> None:
        current_file = PluginRegistry.execute_single("current_file")
        directory = os.path.dirname(current_file) if current_file else os.path.join(Path.home())

        dialog = QFileDialog()
        (selected_file, _filter) = dialog.getOpenFileName(
            caption=_("Open File"),
            dir=directory
        )
        # directory=directory
        if selected_file:
            self.open_file(selected_file)

    def open_file(self, selected_file: str):
        tab = PluginRegistry.execute_single("create_tab", selected_file)
        if tab:
            PluginRegistry.execute_single("add_tab", tab)
            PluginRegistry.execute("after_open_file", selected_file)

    def _get_recent_files(self) -> [str]:
        recent_files = self.settings.session.get('general', 'recent_files', fallback='')
        # print(recent_files)
        files = recent_files.split(os.pathsep)
        if "" in files:
            files.remove("")
        return files

    def _update_recent_files_menu(self):
        self._menu_recent_files.clear()
        files = self._get_recent_files()
        for file in files:
            action = RAction(os.path.basename(file))
            action.set_action(lambda _="", f=file: self.open_file(f))
            self._menu_recent_files.add_action(action)

    def _remember_recent_file(self, file: str):
        files = self._get_recent_files()
        if file in files:
            files.remove(file)
        files.insert(0, file)
        recent_files = os.pathsep.join(files[:10])
        self.settings.set_session('general', 'recent_files', recent_files)
        self._update_recent_files_menu()

    def after_open_file(self, file: str):
        self._remember_recent_file(file)

    def after_start(self):
        open_files_as_string = self.settings.get_session('general', 'open_files', fallback='')
        files = open_files_as_string.split(os.pathsep)
        if "" in files:
            files.remove("")
        for file in files:
            self.open_file(file)

    def before_shutdown(self):
        open_files = PluginRegistry.execute_single("get_open_files")
        if open_files:
            open_files_as_string = os.pathsep.join(open_files)
            self.settings.set_session('general', 'open_files', open_files_as_string)