"""Semantic version comparison.

Ported from net.i2p.util.VersionComparator.
"""

from __future__ import annotations

import re


def compare_versions(v1: str, v2: str) -> int:
    """Compare two version strings numerically.

    Returns -1 if v1 < v2, 0 if equal, 1 if v1 > v2.
    Handles versions like "0.9.50", "0.9.50-1", "2.3.0".
    """
    parts1 = [int(x) for x in re.split(r"[.\-]", v1)]
    parts2 = [int(x) for x in re.split(r"[.\-]", v2)]

    # Pad shorter list with zeros
    max_len = max(len(parts1), len(parts2))
    parts1.extend([0] * (max_len - len(parts1)))
    parts2.extend([0] * (max_len - len(parts2)))

    for a, b in zip(parts1, parts2):
        if a < b:
            return -1
        if a > b:
            return 1
    return 0