"""Launcher for Odysseus (https://github.com/pewdiepie-archdaemon/odysseus).

Odysseus is a self-hosted FastAPI/uvicorn app configured via a `.env` file and
its in-app Settings UI (SQLite-backed) — not a CLI gateway with flags. This
launcher seeds `.env` from odysseus.json on first boot (without touching an
existing one, so in-app Settings changes persist across restarts), runs the
one-time setup script, then execs uvicorn so supervisord can supervise it directly.
"""
import json
import os
import subprocess
import sys
from pathlib import Path

CONFIG_PATH = Path(os.environ.get("ODYSSEUS_CONFIG_PATH", "/app/odysseus.json"))
APP_DIR = Path(os.environ.get("ODYSSEUS_APP_DIR", "/app/odysseus"))
DEFAULT_PORT = os.environ.get("ODYSSEUS_PORT", "18796")


def _load_config() -> dict:
    try:
        return json.loads(CONFIG_PATH.read_text(encoding="utf-8"))
    except Exception:
        return {}


def _seed_env_file(config: dict, port: str) -> None:
    env_path = APP_DIR / ".env"
    if env_path.exists():
        return
    env_vars = dict(config.get("env", {}))
    env_vars.setdefault("APP_BIND", "127.0.0.1")
    env_vars.setdefault("APP_PORT", port)
    lines = [f"{key}={value}" for key, value in env_vars.items()]
    env_path.write_text("\n".join(lines) + "\n", encoding="utf-8")


def main() -> None:
    config = _load_config()
    port = str(config.get("gateway", {}).get("port") or DEFAULT_PORT)
    _seed_env_file(config, port)
    os.chdir(APP_DIR)
    subprocess.run([sys.executable, "setup.py"], check=False)
    os.execvp(
        sys.executable,
        [sys.executable, "-m", "uvicorn", "app:app", "--host", "127.0.0.1", "--port", port],
    )


if __name__ == "__main__":
    main()