"""
Memory client example for the MCP memory server.

The script demonstrates how an external agent or CLI tool can connect to the
``memory_server`` via the stdio transport and invoke its tools.

It performs three operations:
1. Saves a value under ``default:username`` using ``save_with_namespace``.
2. Retrieves all items in the ``default`` namespace with ``get_by_namespace``.
3. Lists keys that match a glob pattern via ``list_keys``.

The output is printed to stdout and should look similar to:

::
    Сохранено: True
    Данные namespace 'default':
      username: Алексей
    Ключи с 'name': ['default:user_name']
"""

import asyncio
from fastmcp import Client

async def main():
    # Launch the server as a subprocess and connect via stdio.
    client = Client("python memory_server.py")
    await client.connect()

    try:
        # 1. Save a value in the default namespace.
        result = await client.call_tool(
            "save_with_namespace",
            {"key": "username", "value": "Алексей", "namespace": "default"},
        )
        print(f"Сохранено: {result}")

        # 2. Retrieve all items in the default namespace.
        items = await client.call_tool(
            "get_by_namespace",
            {"namespace": "default"},
        )
        print("Данные namespace 'default':")
        for item in items:
            print(f"  {item['key']}: {item['value']}")

        # 3. List keys matching a pattern.
        keys = await client.call_tool(
            "list_keys",
            {"pattern": "*name"},
        )
        print("Ключи с 'name':", keys)
    finally:
        await client.close()

if __name__ == "__main__":
    asyncio.run(main())