"""Shared fixtures for e2e tests — dataset discovery + skip markers."""

from pathlib import Path

import pytest

REPO_ROOT = Path(__file__).resolve().parents[2]
DATASETS_ROOT = REPO_ROOT / "datasets"


@pytest.fixture(scope="session")
def euroc_mh01_root() -> Path:
    root = DATASETS_ROOT / "euroc" / "MH_01"
    if not (root / "mav0").is_dir():
        pytest.skip(
            f"EuRoC MH_01 not present at {root}. "
            "Fetch the Machine Hall bundle from ETH Research Collection "
            "(DOI 10.3929/ethz-b-000690084), unpack the inner MH_01_easy.zip "
            f"into {root}/ so that {root}/mav0/ exists."
        )
    return root


@pytest.fixture(scope="session")
def vpair_sample_root() -> Path:
    root = DATASETS_ROOT / "vpair" / "sample"
    if not (root / "poses_query.txt").is_file():
        pytest.skip(
            f"VPAIR sample not present at {root}. "
            "Download the sample zip from the Zenodo link on "
            "https://github.com/AerVisLoc/vpair, then unpack so that "
            f"{root}/poses_query.txt exists."
        )
    return root


@pytest.fixture(scope="session")
def mars_lvig_root() -> Path:
    root = DATASETS_ROOT / "mars_lvig"
    if not root.is_dir():
        pytest.skip(f"MARS-LVIG not present at {root}.")
    return root