"""Segmentation must honour the same post-processing configuration as detection.

Segmentation reuses the detection suppressor but passed only the IoU threshold,
so it silently fell back to the hardcoded containment constant while detection
read a configured one. A deployment tuning containment for a promoted model
changed detection behaviour and left segmentation on the old value.
"""

from __future__ import annotations

import pytest
from shapely.geometry import box

from app.core.config import Settings


def test_segmentation_has_its_own_containment_setting() -> None:
    settings = Settings(_env_file=None)

    assert settings.segmentation_containment_nms_threshold == pytest.approx(0.85)


def test_the_setting_is_independent_of_the_detection_one() -> None:
    """Masks and boxes overlap differently; one value need not fit both."""

    settings = Settings(
        _env_file=None,
        yolo_containment_nms_threshold=0.7,
        segmentation_containment_nms_threshold=0.95,
    )

    assert settings.yolo_containment_nms_threshold == pytest.approx(0.7)
    assert settings.segmentation_containment_nms_threshold == pytest.approx(0.95)


def test_the_configured_value_reaches_the_suppressor() -> None:
    from app.services.detection_service import DetectionService

    def candidate(name: str, geometry, confidence: float):
        return {
            "class_name": "building",
            "confidence": confidence,
            "geometry": geometry,
            "bbox": [0.0, 0.0, 1.0, 1.0],
            "source_tile_path": f"/tiles/{name}.tif",
            "properties": {"name": name},
        }

    outer = candidate("outer", box(0, 0, 10, 10), 0.9)
    # Containment 0.9, IoU 0.09: only the containment rule can act on this pair.
    mostly_nested = candidate("mostly", box(8.2, 1, 10.2, 6), 0.5)

    strict = DetectionService._suppress_duplicate_candidates(
        [outer, mostly_nested], iou_threshold=0.5, containment_threshold=0.95
    )
    loose = DetectionService._suppress_duplicate_candidates(
        [outer, mostly_nested], iou_threshold=0.5, containment_threshold=0.7
    )

    assert len(strict) == 2
    assert len(loose) == 1