"""Settings from config.toml (or the file named by ENSVOICE_CONFIG) and the work-directory layout."""
import os
import pathlib
import tomllib

ROOT = pathlib.Path(__file__).resolve().parent.parent


class Config:
    def __init__(self, path=None):
        path = pathlib.Path(path or os.environ.get("ENSVOICE_CONFIG") or ROOT / "config.toml")
        if not path.exists():
            raise SystemExit(f"no config: {path} (copy config.example.toml to config.toml and edit it)")
        self.raw = tomllib.loads(path.read_text(encoding="utf-8"))
        p = self.raw["paths"]
        self.game = pathlib.Path(p["game"])
        self.work = pathlib.Path(p["work"])
        self.tools = pathlib.Path(p.get("tools", ROOT / "tools"))
        self.work.mkdir(parents=True, exist_ok=True)
        # ENSVOICE_NOTES=n016,n238 limits segments (and so everything after it) to these notes
        self.only = {x.strip() for x in os.environ.get("ENSVOICE_NOTES", "").split(",") if x.strip()}

    def __getitem__(self, key):
        return self.raw[key]

    def get(self, section, key, default=None):
        return self.raw.get(section, {}).get(key, default)

    # work-directory layout (everything derived from the game stays here, never in the repo)
    def w(self, *parts) -> pathlib.Path:
        p = self.work.joinpath(*parts)
        p.parent.mkdir(parents=True, exist_ok=True)
        return p


def load(path=None) -> Config:
    return Config(path)