from dataclasses import dataclass
from pathlib import Path
from typing import Iterable, Tuple


@dataclass(frozen=True)
class ScanConfig:
    """Read-only paths used for one library scan."""

    serato: Path
    music: Path
    out: Path
    report: Path
    reference_roots: Tuple[Path, ...] = ()

    @classmethod
    def build(
        cls,
        serato: Path,
        music: Path,
        out: Path,
        report: Path,
        reference_roots: Iterable[Path] = (),
    ) -> "ScanConfig":
        return cls(serato, music, out, report, tuple(reference_roots))