"""Write YouTube stream key into repo config/youtube.ini while preserving other keys."""
from __future__ import annotations

import configparser
import io
from pathlib import Path

from src.config_governance import save_managed_file


def write_youtube_ini_stream_key(repo_root: Path, stream_key_or_url: str) -> str:
    root = repo_root.resolve()
    cfg_path = root / "config" / "youtube.ini"
    value = (stream_key_or_url or "").strip()
    if not value:
        return "sync skipped: empty youtube_rtmp_key"

    cfg_path.parent.mkdir(parents=True, exist_ok=True)
    parser = configparser.ConfigParser()
    if cfg_path.is_file():
        parser.read(cfg_path, encoding="utf-8")
    if not parser.has_section("youtube"):
        parser.add_section("youtube")
    parser.set("youtube", "key", value)
    buf = io.StringIO()
    parser.write(buf)
    save_managed_file("app-config", "youtube.ini", buf.getvalue())
    return f"wrote {cfg_path}"