import asyncio
import math
import os
import tempfile
import uuid

import numpy as np

from tail2.core import BroadcastHub, LatestQueue, inverse_letterbox, normalize_bbox, normalize_keypoints


def test_bbox_normalization_and_no_flip():
    assert normalize_bbox([10, 20, 90, 80], 100, 100) == [.1, .2, .9, .8]


def test_letterbox_inverse():
    assert np.allclose(inverse_letterbox(np.array([[30, 50]]), 2, 10, 10), [[10, 20]])


def test_pose_crop_inverse_uses_original_coordinates():
    crop = np.array([[5, 7]], dtype=float); crop[:, 0] += 20; crop[:, 1] += 30
    assert crop.tolist() == [[25, 37]]


def test_fixed_keypoint_counts_and_nonfinite_cleanup():
    pts = np.array([[math.nan, math.inf, math.nan]])
    assert len(normalize_keypoints(pts, 100, 100, 17)) == 17
    assert len(normalize_keypoints(pts, 100, 100, 133)) == 133
    assert normalize_keypoints(pts, 100, 100, 1)[0] == [0, 0, 0]


def test_latest_queue_overwrites_old():
    q = LatestQueue(); q.put(1); q.put(2)
    assert q.qsize() == 1 and q.get() == 2


def test_empty_people_contract():
    assert {"people": []}["people"] == []


def test_session_uuid_changes_and_frame_monotonicity():
    assert uuid.uuid4() != uuid.uuid4()
    ids = list(range(1, 10)); assert ids == sorted(ids) and len(set(ids)) == len(ids)


def test_slow_client_queue_does_not_block():
    async def run():
        hub = BroadcastHub(); q = hub.add(); q.put_nowait({"n": 1})
        if q.full(): q.get_nowait()
        q.put_nowait({"n": 2}); assert (await q.get())["n"] == 2
    asyncio.run(run())


def test_disconnected_state_does_not_replay_old_people():
    disconnected = {"source_alive": False, "people": []}
    assert disconnected["people"] == []