from __future__ import annotations

import importlib.util
from pathlib import Path


SCRIPT = Path(__file__).parents[2] / "scripts" / "build_regional_yolo_dataset.py"
SPEC = importlib.util.spec_from_file_location("regional_yolo_dataset", SCRIPT)
assert SPEC and SPEC.loader
MODULE = importlib.util.module_from_spec(SPEC)
SPEC.loader.exec_module(MODULE)


def test_select_paths_is_region_and_split_safe() -> None:
    manifest = {
        "samples": [
            {"sample_slug": "f-train", "region": "flanders", "split": "train"},
            {"sample_slug": "f-val", "region": "flanders", "split": "val"},
            {"sample_slug": "f-test", "region": "flanders", "split": "test"},
            {"sample_slug": "w-train", "region": "wallonia", "split": "train"},
        ]
    }
    summary = {
        "tiles": [
            {"sample_slug": "f-train", "split": "train", "image_path": "/f-train.png"},
            {"sample_slug": "f-val", "split": "val", "image_path": "/f-val.png"},
            {"sample_slug": "f-test", "split": "val", "image_path": "/f-test.png"},
            {"sample_slug": "w-train", "split": "train", "image_path": "/w-train.png"},
        ]
    }
    train, val = MODULE.select_paths(summary, manifest, "flanders")
    assert train == ["/f-train.png"]
    assert val == ["/f-val.png"]