"""Sequence step ``beats`` hold (e.g. 12 beats on preset 42, then 4 on preset 5)."""

import asyncio
import os
import sys

PROJECT_ROOT = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
SRC_PATH = os.path.join(PROJECT_ROOT, "src")
if SRC_PATH not in sys.path:
    sys.path.insert(0, SRC_PATH)

from util import sequence_playback as sp  # noqa: E402


def test_step_holds_beats_before_lane_send(monkeypatch):
    sent = []

    async def fake_send_lane(i, st, ctx):
        sent.append((int(st.get("stepIdx", 0)), int(st.get("beatCount", 0))))

    monkeypatch.setattr(sp, "_send_lane", fake_send_lane)

    async def noop_stop(**_kwargs):
        with sp._beat_run_lock:
            sp._beat_run = None

    monkeypatch.setattr(sp, "stop_playback", noop_stop)

    ctx = {
        "num_lanes": 1,
        "loop": False,
        "lanes": [[{"preset_id": "42", "beats": 12}, {"preset_id": "5", "beats": 4}]],
        "lane_states": [{"stepIdx": 0, "beatCount": 0, "done": False}],
        "sequence_loop_beat": 0,
    }
    with sp._beat_run_lock:
        sp._beat_run = ctx

    async def run():
        for _ in range(11):
            await sp.process_active_beat_advance()
        await sp.process_active_beat_advance()
        for _ in range(3):
            await sp.process_active_beat_advance()
        await sp.process_active_beat_advance()

    asyncio.run(run())
    assert sent == [(1, 0)]
    assert ctx["lane_states"][0]["done"] is True
    with sp._beat_run_lock:
        sp._beat_run = None