"""
app/services/config_service.py
Read and write runtime settings stored in the SQLite settings table.
"""

from __future__ import annotations

import logging

from app.database import get_conn, get_write_conn
from app.models import ConfigResponse

logger = logging.getLogger(__name__)

_SETTING_KEYS = {"default_wait_seconds", "default_empty_response", "agent_stale_after_seconds"}


def get_config() -> ConfigResponse:
    with get_conn() as conn:
        rows = conn.execute("SELECT key, value FROM settings").fetchall()
    data = {r["key"]: r["value"] for r in rows}
    return ConfigResponse(
        default_wait_seconds=int(data.get("default_wait_seconds", 10)),
        default_empty_response=data.get("default_empty_response", ""),
        agent_stale_after_seconds=int(data.get("agent_stale_after_seconds", 30)),
    )


def update_config(
    default_wait_seconds: int | None = None,
    default_empty_response: str | None = None,
    agent_stale_after_seconds: int | None = None,
) -> ConfigResponse:
    updates: dict[str, str] = {}
    if default_wait_seconds is not None:
        updates["default_wait_seconds"] = str(default_wait_seconds)
    if default_empty_response is not None:
        updates["default_empty_response"] = default_empty_response
    if agent_stale_after_seconds is not None:
        updates["agent_stale_after_seconds"] = str(agent_stale_after_seconds)

    if updates:
        with get_write_conn() as conn:
            for key, value in updates.items():
                conn.execute(
                    "INSERT OR REPLACE INTO settings (key, value) VALUES (?, ?)",
                    (key, value),
                )
        logger.info("Config updated: %s", list(updates.keys()))

    return get_config()