"""utility functions"""

from pathlib import Path
import re
from typing import Any, Callable, Tuple

import numpy as np

from timezonefinder.configs import (
    DEFAULT_DATA_DIR,
    OCEAN_TIMEZONE_PREFIX,
)
from timezonefinder import utils_numba, utils_clang


# make numba functions available via utils
using_numba = utils_numba.using_numba
clang_extension_loaded = utils_clang.clang_extension_loaded
is_valid_lat = utils_numba.is_valid_lat
is_valid_lng = utils_numba.is_valid_lng
coord2int = utils_numba.coord2int
int2coord = utils_numba.int2coord
convert2coords = utils_numba.convert2coords
convert2coord_pairs = utils_numba.convert2coord_pairs
get_last_change_idx = utils_numba.get_last_change_idx


inside_polygon: Callable[[int, int, np.ndarray], bool]
# at import time fix which "point-in-polygon" implementation will be used
if clang_extension_loaded and not using_numba:
    # use the C implementation only if Numba is not present
    inside_polygon = utils_clang.pt_in_poly_clang
else:
    # use the (JIT compiled) python function if Numba is present or the C extension cannot be loaded
    inside_polygon = utils_numba.pt_in_poly_python


def validate_lat(lat: float) -> None:
    if not is_valid_lat(lat):
        raise ValueError(f"The given latitude {lat} is out of bounds")


def validate_lng(lng: float) -> None:
    if not is_valid_lng(lng):
        raise ValueError(f"The given longitude {lng} is out of bounds")


def validate_coordinates(lng: float, lat: float) -> Tuple[float, float]:
    lng, lat = float(lng), float(lat)
    validate_lng(lng)
    validate_lat(lat)
    return lng, lat


def close_resource(obj: Any) -> None:
    """Safely close a resource, ignoring specific expected errors."""
    if obj is None:
        return
    try:
        obj.close()
    except (AttributeError, OSError, ValueError):
        pass


def is_ocean_timezone(timezone_name: str) -> bool:
    if re.match(OCEAN_TIMEZONE_PREFIX, timezone_name) is None:
        return False
    return True


def get_boundaries_dir(data_dir: Path = DEFAULT_DATA_DIR) -> Path:
    """Return the path to the boundaries directory."""
    return data_dir / "boundaries"


def get_holes_dir(data_dir: Path = DEFAULT_DATA_DIR) -> Path:
    """Return the path to the holes directory."""
    return data_dir / "holes"


def get_hole_registry_path(data_dir: Path = DEFAULT_DATA_DIR) -> Path:
    """Return the path to the hole registry file."""
    return data_dir / "hole_registry.json"