# Copyright (c) Meta Platforms, Inc. and affiliates.
# All rights reserved.
#
# This source code is licensed under the terms described in the LICENSE file in
# the root directory of this source tree.

import pytest

from llama_stack.apis.agents import AgentConfig, Turn
from llama_stack.apis.inference import SamplingParams, UserMessage
from llama_stack.providers.datatypes import Api
from llama_stack.providers.utils.kvstore import kvstore_impl, SqliteKVStoreConfig
from .fixtures import pick_inference_model

from .utils import create_agent_session


@pytest.fixture
def sample_messages():
    return [
        UserMessage(content="What's the weather like today?"),
    ]


@pytest.fixture
def common_params(inference_model):
    inference_model = pick_inference_model(inference_model)

    return dict(
        model=inference_model,
        instructions="You are a helpful assistant.",
        enable_session_persistence=True,
        sampling_params=SamplingParams(temperature=0.7, top_p=0.95),
        input_shields=[],
        output_shields=[],
        tools=[],
        max_infer_iters=5,
    )


class TestAgentPersistence:
    @pytest.mark.asyncio
    async def test_delete_agents_and_sessions(self, agents_stack, common_params):
        agents_impl = agents_stack.impls[Api.agents]
        agent_id, session_id = await create_agent_session(
            agents_impl,
            AgentConfig(
                **{
                    **common_params,
                    "input_shields": [],
                    "output_shields": [],
                }
            ),
        )

        run_config = agents_stack.run_config
        provider_config = run_config.providers["agents"][0].config
        persistence_store = await kvstore_impl(
            SqliteKVStoreConfig(**provider_config["persistence_store"])
        )

        await agents_impl.delete_agents_session(agent_id, session_id)
        session_response = await persistence_store.get(
            f"session:{agent_id}:{session_id}"
        )

        await agents_impl.delete_agents(agent_id)
        agent_response = await persistence_store.get(f"agent:{agent_id}")

        assert session_response is None
        assert agent_response is None

    @pytest.mark.asyncio
    async def test_get_agent_turns_and_steps(
        self, agents_stack, sample_messages, common_params
    ):
        agents_impl = agents_stack.impls[Api.agents]

        agent_id, session_id = await create_agent_session(
            agents_impl,
            AgentConfig(
                **{
                    **common_params,
                    "input_shields": [],
                    "output_shields": [],
                }
            ),
        )

        # Create and execute a turn
        turn_request = dict(
            agent_id=agent_id,
            session_id=session_id,
            messages=sample_messages,
            stream=True,
        )

        turn_response = [
            chunk async for chunk in await agents_impl.create_agent_turn(**turn_request)
        ]

        final_event = turn_response[-1].event.payload
        turn_id = final_event.turn.turn_id

        provider_config = agents_stack.run_config.providers["agents"][0].config
        persistence_store = await kvstore_impl(
            SqliteKVStoreConfig(**provider_config["persistence_store"])
        )
        turn = await persistence_store.get(f"session:{agent_id}:{session_id}:{turn_id}")
        response = await agents_impl.get_agents_turn(agent_id, session_id, turn_id)

        assert isinstance(response, Turn)
        assert response == final_event.turn
        assert turn == final_event.turn.model_dump_json()

        steps = final_event.turn.steps
        step_id = steps[0].step_id
        step_response = await agents_impl.get_agents_step(
            agent_id, session_id, turn_id, step_id
        )

        assert step_response.step == steps[0]