from __future__ import annotations

from dataclasses import dataclass
from pathlib import Path


@dataclass(frozen=True)
class PortContext:
    source_root: Path
    tests_root: Path
    assets_root: Path


def build_port_context(base: Path | None = None) -> PortContext:
    root = base or Path(__file__).resolve().parent.parent
    return PortContext(source_root=root / 'src', tests_root=root / 'tests', assets_root=root / 'assets')