"""Output Devices tab: horizontally-scrolling row of every playback device
(pactl sinks), each with its own volume meter/L-R pair, mute, live peak bar,
and a "Set Default" button. Profile switching lives on the Cards tab instead
(see ui/profile_card.py for why)."""

from __future__ import annotations

import gi

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

from ui.device_card import DeviceCard
from ui.scroll_row import ScrollRow


class OutputTab(Gtk.Box):
    def __init__(self, backend, peaks) -> None:
        super().__init__(orientation=Gtk.Orientation.VERTICAL)
        self.add_css_class("sb-tab-page")
        self._backend = backend
        self._peaks = peaks
        self._default_name = ""
        self._row = ScrollRow(self._make_card, empty_text="No output devices found")
        self.append(self._row)

    def _make_card(self, item: dict, default_name: str) -> DeviceCard:
        return DeviceCard(self._backend, self._peaks, "sink", item,
                          default_name, self._backend.set_default_sink)

    def refresh(self) -> None:
        def got_defaults(sink_name: str, _source_name: str) -> None:
            self._default_name = sink_name

            def got_sinks(sinks: list[dict]) -> None:
                self._row.sync(sinks, self._default_name)
            self._backend.list_sinks(got_sinks)
        self._backend.get_defaults(got_defaults)

    def activate(self) -> None:
        self._row.activate()
        self.refresh()

    def deactivate(self) -> None:
        self._row.deactivate()