"""Fixtures for OVHcloud AI Endpoints integration tests."""

from collections.abc import AsyncGenerator, Generator
import json
from typing import Any
from unittest.mock import AsyncMock, MagicMock, patch

from openai.types import CompletionUsage, Model
from openai.types.chat import ChatCompletion, ChatCompletionMessage
from openai.types.chat.chat_completion import Choice
import pytest

from homeassistant.components.ovhcloud_ai_endpoints.const import DOMAIN
from homeassistant.config_entries import ConfigSubentryData
from homeassistant.const import CONF_API_KEY, CONF_LLM_HASS_API, CONF_MODEL, CONF_PROMPT
from homeassistant.core import HomeAssistant
from homeassistant.helpers import llm
from homeassistant.setup import async_setup_component

from tests.common import MockConfigEntry, async_load_fixture


@pytest.fixture
def mock_setup_entry() -> Generator[AsyncMock]:
    """Override async_setup_entry."""
    with patch(
        "homeassistant.components.ovhcloud_ai_endpoints.async_setup_entry",
        return_value=True,
    ) as mock_setup_entry:
        yield mock_setup_entry


@pytest.fixture
def enable_assist() -> bool:
    """Toggle for whether the conversation subentry exposes the Assist API."""
    return False


@pytest.fixture
def conversation_subentry_data(enable_assist: bool) -> dict[str, Any]:
    """Mock conversation subentry data."""
    res: dict[str, Any] = {
        CONF_MODEL: "Meta-Llama-3_3-70B-Instruct",
        CONF_PROMPT: "You are a helpful assistant.",
    }
    if enable_assist:
        res[CONF_LLM_HASS_API] = [llm.LLM_API_ASSIST]
    return res


@pytest.fixture
def mock_config_entry(
    hass: HomeAssistant,
    conversation_subentry_data: dict[str, Any],
) -> MockConfigEntry:
    """Mock a config entry."""
    return MockConfigEntry(
        title="OVHcloud AI Endpoints",
        domain=DOMAIN,
        data={
            CONF_API_KEY: "bla",
        },
        subentries_data=[
            ConfigSubentryData(
                data=conversation_subentry_data,
                subentry_id="ABCDEF",
                subentry_type="conversation",
                title="Meta-Llama-3_3-70B-Instruct",
                unique_id=None,
            ),
        ],
    )


async def _build_models(hass: HomeAssistant) -> list[Model]:
    """Load mocked models from the fixture file."""
    raw = await async_load_fixture(hass, "models.json", DOMAIN)
    return [Model.model_validate(m) for m in json.loads(raw)["data"]]


@pytest.fixture
async def mock_openai_client(hass: HomeAssistant) -> AsyncGenerator[AsyncMock]:
    """Mock the AsyncOpenAI client used by the integration."""
    models = await _build_models(hass)

    async def _list_models(*args: Any, **kwargs: Any) -> AsyncGenerator[Model]:
        for model in models:
            yield model

    with patch(
        "homeassistant.components.ovhcloud_ai_endpoints.AsyncOpenAI"
    ) as mock_async_openai:
        client = mock_async_openai.return_value
        client.with_options.return_value = client
        client.models.list = MagicMock(side_effect=_list_models)
        client.chat.completions.create = AsyncMock(
            return_value=ChatCompletion(
                id="chatcmpl-1234567890ABCDEFGHIJKLMNOPQRS",
                choices=[
                    Choice(
                        finish_reason="stop",
                        index=0,
                        message=ChatCompletionMessage(
                            content="Hello, how can I help you?",
                            role="assistant",
                            function_call=None,
                            tool_calls=None,
                        ),
                    )
                ],
                created=1700000000,
                model="Meta-Llama-3_3-70B-Instruct",
                object="chat.completion",
                system_fingerprint=None,
                usage=CompletionUsage(
                    completion_tokens=9, prompt_tokens=8, total_tokens=17
                ),
            )
        )
        yield client


@pytest.fixture(autouse=True)
async def setup_ha(hass: HomeAssistant) -> None:
    """Set up Home Assistant."""
    assert await async_setup_component(hass, "homeassistant", {})