"""The desktop and browser must see the same events, without duplicating replay."""
from tui_gateway import event_replay, server


class Viewer:
    def __init__(self, fail=False):
        self.frames = []
        self.fail = fail

    def write(self, frame):
        if self.fail:
            raise OSError("disconnected")
        self.frames.append(frame)
        return True


def test_event_reaches_both_viewers_once_and_is_recorded_once(monkeypatch):
    desktop, chrome = Viewer(), Viewer()
    monkeypatch.setattr(server, "_sessions", {"browser-test": {
        "transport": chrome, "viewers": {desktop: 1, chrome: 2},
    }})
    event_replay.reset_replay_state()
    try:
        frame = server._event_frame("message.delta", "browser-test", {"text": "İki yüzey"})
        assert server.write_json(frame)
        assert desktop.frames == chrome.frames == [frame]
        assert event_replay.latest_seq("browser-test") == 1
        assert len(event_replay.events_since("browser-test", 0)) == 1
    finally:
        event_replay.reset_replay_state()


def test_closed_primary_does_not_hide_events_from_remaining_viewer(monkeypatch):
    desktop, chrome = Viewer(), Viewer(fail=True)
    monkeypatch.setattr(server, "_sessions", {"browser-test": {
        "transport": chrome, "viewers": {desktop: 1, chrome: 2},
    }})
    event_replay.reset_replay_state()
    try:
        frame = server._event_frame("approval.request", "browser-test", {"request_id": "test"})
        assert server.write_json(frame)
        assert desktop.frames == [frame]
    finally:
        event_replay.reset_replay_state()