"""System configuration KV store operations."""

import time
from typing import Optional, Any

from storage.db import get_connection


def get_config(key: str) -> Optional[str]:
    """Get a single config value."""
    with get_connection() as conn:
        row = conn.execute(
            "SELECT value FROM system_config WHERE key = ?", (key,)
        ).fetchone()
    return row["value"] if row else None


def set_config(key: str, value: str, description: str = "") -> None:
    """Set or update a config value."""
    now = time.strftime("%Y-%m-%dT%H:%M:%SZ", time.gmtime())
    with get_connection() as conn:
        conn.execute(
            """INSERT INTO system_config (key, value, description, updated_at)
               VALUES (?, ?, ?, ?)
               ON CONFLICT(key) DO UPDATE SET
               value = excluded.value,
               description = excluded.description,
               updated_at = excluded.updated_at""",
            (key, value, description, now),
        )
        conn.commit()


def delete_config(key: str) -> bool:
    """Delete a config value."""
    with get_connection() as conn:
        cursor = conn.execute(
            "DELETE FROM system_config WHERE key = ?", (key,)
        )
        conn.commit()
        return cursor.rowcount > 0


def list_configs() -> list[dict]:
    """List all system config entries."""
    with get_connection() as conn:
        rows = conn.execute("SELECT * FROM system_config ORDER BY key").fetchall()
    return [dict(row) for row in rows]


def get_all_configs_as_dict() -> dict[str, str]:
    """Get all configs as a simple dict."""
    with get_connection() as conn:
        rows = conn.execute("SELECT key, value FROM system_config").fetchall()
    return {row["key"]: row["value"] for row in rows}