"""Adw.Application with single-instance nxm:// forwarding."""
from __future__ import annotations

from pathlib import Path

import gi

gi.require_version("Gtk", "4.0")
gi.require_version("Adw", "1")
from gi.repository import Adw, Gio, GLib

from .. import APP_ID
from ..core.manager import Manager
from .window import MainWindow


class App(Adw.Application):
    def __init__(self):
        # HANDLES_COMMAND_LINE makes a second launch (e.g. the browser opening nxm://) forward its
        # arguments to this already-running instance over D-Bus instead of opening a second window.
        super().__init__(application_id=APP_ID, flags=Gio.ApplicationFlags.HANDLES_COMMAND_LINE)
        self.manager: Manager | None = None
        self.win: MainWindow | None = None
        quit_action = Gio.SimpleAction.new("quit", None)
        quit_action.connect("activate", lambda *_: self.quit())
        self.add_action(quit_action)
        self.set_accels_for_action("app.quit", ["<Primary>q"])

    def _window(self) -> MainWindow:
        if self.win is None:
            self.manager = Manager()
            self.win = MainWindow(self, self.manager)
        return self.win

    def do_activate(self):
        self._window().present()

    def do_command_line(self, cmdline: Gio.ApplicationCommandLine) -> int:
        args = cmdline.get_arguments()[1:]
        win = self._window()
        win.present()
        for a in args:
            if a.startswith("nxm://"):
                GLib.idle_add(lambda url=a: (win.handle_nxm(url), False)[1])
            elif Path(a).exists():
                win.import_paths([Path(a)])
        return 0