#!/usr/bin/env python3
"""horizon-dock — a hover-scrollable orbital dock for hyprdrive, matching
orbit-menu's visual language.

Single-instance, same pattern as astal-menu/orbit-menu's main.py: the first
launch builds the (hidden) window and holds; later invocations forward their
verb over D-Bus via scripts/horizon-dock.sh instead of spawning a second
python3+GTK4 process.

  main.py            run the resident instance (stays hidden until toggled)
  main.py --show      slide/fade in
  main.py --hide      slide/fade out
  main.py --toggle    whichever of the above applies
"""

from __future__ import annotations

import os
import sys
from pathlib import Path

# horizon-dock-start.sh LD_PRELOADs libgtk4-layer-shell (load-ordering requirement
# ahead of libwayland-client). Drop it once resident so it isn't inherited by
# anything this process launches (see astal-menu/orbit-menu's main.py for the same
# rationale — some GTK4 apps abort at startup with the layer-shell lib preloaded).
os.environ.pop("LD_PRELOAD", None)

sys.path.insert(0, str(Path(__file__).resolve().parent))

import gi  # noqa: E402

gi.require_version("Gtk", "4.0")
from gi.repository import Gio, GLib, Gtk  # noqa: E402

import config  # noqa: E402
import theme  # noqa: E402
from dock import HorizonDock  # noqa: E402
from paths import APP_ID  # noqa: E402


class HorizonDockApp(Gtk.Application):
    def __init__(self) -> None:
        super().__init__(application_id=APP_ID,
                         flags=Gio.ApplicationFlags.HANDLES_COMMAND_LINE)
        self.window: HorizonDock | None = None

    def do_startup(self) -> None:
        Gtk.Application.do_startup(self)
        theme.load_css()
        self.window = HorizonDock(tray_enabled=config.tray_enabled(),
                                  hologram_enabled=config.hologram_enabled())
        self._register_actions()
        self.hold()  # stay alive with no visible window

    def _register_actions(self) -> None:
        def add(name: str, callback) -> None:
            action = Gio.SimpleAction.new(name, None)
            action.connect("activate", callback)
            self.add_action(action)

        def guarded(fn):
            def wrapper(*_a) -> None:
                assert self.window is not None
                fn(self.window)
            return wrapper

        add("show", guarded(lambda w: w.show_dock()))
        add("hide", guarded(lambda w: w.hide_dock()))
        add("toggle", guarded(lambda w: w.toggle()))

    def do_command_line(self, cmdline: Gio.ApplicationCommandLine) -> int:
        args = list(cmdline.get_arguments()[1:])
        verb = args[0] if args else "--daemon"
        if self.window is None:
            return 0
        if verb == "--show":
            self.window.show_dock()
        elif verb == "--hide":
            self.window.hide_dock()
        elif verb == "--toggle":
            self.window.toggle()
        # --daemon and anything else: no-op (stay resident, hidden)
        return 0

    def do_activate(self) -> None:
        pass  # resident instance: nothing to do on plain activate


def main() -> int:
    GLib.set_prgname("horizon-dock")
    return HorizonDockApp().run(sys.argv)


if __name__ == "__main__":
    raise SystemExit(main())