import json

import pytest

_TILING_TIMEOUT = 120
_GSD = {"altitude": 400, "focal_length": 24, "sensor_width": 23.5}
_DUP_THRESHOLD = 0.01


def _assert_coords_normalized(detections):
    for d in detections:
        for k in ("centerX", "centerY", "width", "height"):
            v = d[k]
            assert 0.0 <= v <= 1.0


def _assert_no_same_label_near_duplicate_centers(detections):
    by_label = {}
    for d in detections:
        label = d["label"]
        cx, cy = d["centerX"], d["centerY"]
        prev = by_label.setdefault(label, [])
        for pcx, pcy in prev:
            assert not (
                abs(cx - pcx) < _DUP_THRESHOLD and abs(cy - pcy) < _DUP_THRESHOLD
            ), f"near-duplicate centers for label {label!r}: ({pcx},{pcy}) vs ({cx},{cy})"
        prev.append((cx, cy))


@pytest.mark.slow
def test_ft_p04_p16_gsd_tiling_and_deduplication(image_detect, image_large, warm_engine):
    # Assert
    body, _ = image_detect(
        image_large, "img.jpg",
        config=json.dumps({**_GSD, "big_image_tile_overlap_percent": 20}),
        timeout=_TILING_TIMEOUT,
    )
    assert isinstance(body, list)
    _assert_coords_normalized(body)
    _assert_no_same_label_near_duplicate_centers(body)
