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


@dataclass(frozen=True)
class DatabaseTrack:
    """Read-only metadata extracted from one database V2 track record."""

    path: Path
    filename: str
    title: Optional[str] = None
    artist: Optional[str] = None
    album: Optional[str] = None
    genre: Optional[str] = None


@dataclass(frozen=True)
class SeratoDatabase:
    path: Path
    version: Optional[str]
    tracks: Tuple[DatabaseTrack, ...]