from __future__ import annotations

import importlib.util
from pathlib import Path

import pytest


ROOT = Path(__file__).resolve().parents[1]


def load(name: str):
    path = ROOT / "scripts" / f"{name}.py"
    spec = importlib.util.spec_from_file_location(name, path)
    assert spec and spec.loader
    module = importlib.util.module_from_spec(spec)
    spec.loader.exec_module(module)
    return module


miner = load("build_building_proposal_classifier_dataset")
trainer = load("train_building_proposal_classifier")


def test_classify_proposals_consumes_reference_once() -> None:
    reference = [(0.0, 0.0, 10.0, 10.0)]
    proposals = [((0.0, 0.0, 10.0, 10.0), 0.9), ((0.0, 0.0, 10.0, 10.0), 0.8)]
    assert [item[0] for item in miner.classify_proposals(proposals, reference, 0.25)] == ["positive", "negative"]


def test_eligible_tiles_rejects_protected_manifest_split() -> None:
    manifest = {"samples": [{"sample_slug": "x", "region": "flanders", "split": "test"}]}
    summary = {"tiles": [{"sample_slug": "x", "split": "train", "image_path": "x.png"}]}
    with pytest.raises(ValueError, match="protected"):
        miner.eligible_tiles(summary, manifest, "flanders")


def test_binary_metrics() -> None:
    result = trainer.binary_metrics([0.9, 0.8, 0.2, 0.1], [1, 0, 1, 0])
    assert result == {"tp": 1, "fp": 1, "fn": 1, "precision": 0.5, "recall": 0.5, "f1": 0.5}