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

import configparser
import io
import re
from pathlib import Path

from src.config_governance import save_managed_file


def _youtube_sync_relpaths(root: Path, process: str | None = None) -> list[str]:
    relpaths = ["youtube.ini"]
    if process:
        safe = re.sub(r"[^a-zA-Z0-9_.-]", "_", process.strip())
        if safe:
            relpaths.append(f"youtube.{safe}.ini")
    elif (root / "config" / "youtube.youtube.ini").is_file():
        relpaths.append("youtube.youtube.ini")
    return relpaths


def write_youtube_ini_stream_key(repo_root: Path, stream_key_or_url: str, process: str | None = None) -> str:
    root = repo_root.resolve()
    value = (stream_key_or_url or "").strip()
    if not value:
        return "sync skipped: empty youtube_rtmp_key"

    written: list[str] = []
    for rel in _youtube_sync_relpaths(root, process):
        cfg_path = root / "config" / rel
        cfg_path.parent.mkdir(parents=True, exist_ok=True)
        parser = configparser.ConfigParser()
        if cfg_path.is_file():
            parser.read(cfg_path, encoding="utf-8-sig")
        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", rel, buf.getvalue())
        written.append(str(cfg_path))
    return f"wrote {', '.join(written)}"