"""Small SQLite store for OpenViking user keys."""
from __future__ import annotations

import sqlite3
from datetime import datetime, timezone
from pathlib import Path


class OpenVikingUserKeyStore:
    def __init__(self, sqlite_path: str) -> None:
        self.sqlite_path = sqlite_path
        self._ensure_table()

    def get_user_key(self, user_id: str) -> str | None:
        with self._connect() as conn:
            row = conn.execute(
                "SELECT user_key FROM memory_system_openviking_users WHERE user_id = ?",
                (user_id,),
            ).fetchone()
        return str(row[0]) if row else None

    def save_user_key(self, user_id: str, user_key: str) -> None:
        now = datetime.now(timezone.utc).isoformat()
        with self._connect() as conn:
            conn.execute(
                """
                INSERT INTO memory_system_openviking_users (user_id, account_id, user_key, created_at, updated_at)
                VALUES (?, ?, ?, ?, ?)
                ON CONFLICT(user_id) DO UPDATE SET
                    user_key = excluded.user_key,
                    updated_at = excluded.updated_at
                """,
                (user_id, user_id, user_key, now, now),
            )

    def _ensure_table(self) -> None:
        path = Path(self.sqlite_path)
        path.parent.mkdir(parents=True, exist_ok=True)
        with self._connect() as conn:
            conn.execute(
                """
                CREATE TABLE IF NOT EXISTS memory_system_openviking_users (
                    user_id TEXT PRIMARY KEY,
                    account_id TEXT NOT NULL,
                    user_key TEXT NOT NULL,
                    created_at TEXT NOT NULL,
                    updated_at TEXT NOT NULL
                )
                """
            )

    def _connect(self) -> sqlite3.Connection:
        return sqlite3.connect(self.sqlite_path)