"""Generate a disposable, synthetic Serato library from the sample manifest."""

import argparse
import json
from pathlib import Path
from typing import Optional


SAMPLE_ROOT = Path(__file__).parent
SERATO_PATH_PREFIX = "Users/djsplice/OneDrive/Jukebox/"


def load_manifest() -> dict:
    return json.loads((SAMPLE_ROOT / "manifest.json").read_text(encoding="utf-8"))


def build_sample(output: Optional[Path] = None) -> Path:
    root = output or SAMPLE_ROOT / "generated"
    manifest = load_manifest()
    music_root = root / "Music"
    crate_root = root / "Serato" / "_Serato_" / "Subcrates"
    crate_root.mkdir(parents=True, exist_ok=True)

    for relative_path in manifest["tracks"]:
        track_path = music_root / relative_path
        track_path.parent.mkdir(parents=True, exist_ok=True)
        track_path.write_bytes(
            f"Synthetic Serato Doctor fixture: {relative_path}\n".encode("utf-8")
        )

    for crate in manifest["crates"]:
        records = "".join(
            f"{SERATO_PATH_PREFIX}{relative_path}otrk"
            for relative_path in crate["references"]
        )
        (crate_root / crate["name"]).write_bytes(records.encode("utf-16-le"))

    return root


def main() -> None:
    parser = argparse.ArgumentParser(description=__doc__)
    parser.add_argument("--output", type=Path)
    args = parser.parse_args()
    root = build_sample(args.output)
    print(f"Generated synthetic library: {root}")


if __name__ == "__main__":
    main()