"""Tests that build_models resolves separate clients for judge and embedding models."""

from unittest.mock import MagicMock, patch, call
from rag_eval.metrics.factory import build_models
from rag_eval.settings import EvaluationSettings


def _settings():
    return EvaluationSettings(_env_file=None)


def _patch_profiles(profiles_by_model: dict):
    """Patch profile_manager.list_all() to return fake profiles."""
    fake_profiles = []
    for model, base_url in profiles_by_model.items():
        p = MagicMock()
        p.model = model
        p.base_url = base_url
        p.api_key = "sk-test"
        p.timeout_seconds = 30
        fake_profiles.append(p)
    return fake_profiles


def test_build_models_uses_separate_clients_for_different_profiles(monkeypatch):
    """When judge and embedding models have different profiles, two AsyncOpenAI clients are created."""
    created_clients = []

    class _FakeClient:
        def __init__(self, **kwargs):
            created_clients.append(kwargs.copy())

    fake_profiles = _patch_profiles({
        "gpt-5": "http://llm-gateway/v1",
        "Qwen3-Embedding-4B": "https://api.siliconflow.cn/v1",
    })

    import webapp.services.profile_manager as pm_mod
    monkeypatch.setattr(pm_mod.profile_manager, "list_all", lambda: fake_profiles)

    from ragas.llms.base import InstructorBaseRagasLLM
    from ragas.embeddings.base import BaseRagasEmbedding

    with patch("rag_eval.metrics.factory.AsyncOpenAI", side_effect=_FakeClient), \
         patch("rag_eval.metrics.factory.llm_factory", return_value=MagicMock(spec=InstructorBaseRagasLLM)), \
         patch("rag_eval.metrics.factory.embedding_factory", return_value=MagicMock(spec=BaseRagasEmbedding)):
        build_models("gpt-5", "Qwen3-Embedding-4B", _settings())

    # Two distinct clients should have been created with different base_urls.
    assert len(created_clients) == 2
    base_urls = {c["base_url"] for c in created_clients}
    assert "http://llm-gateway/v1" in base_urls
    assert "https://api.siliconflow.cn/v1" in base_urls


def test_build_models_shares_client_when_same_profile(monkeypatch):
    """When judge and embedding models resolve to the same settings, only one client is created."""
    created_clients = []

    class _FakeClient:
        def __init__(self, **kwargs):
            created_clients.append(kwargs.copy())

    # Both models map to the same gateway.
    fake_profiles = _patch_profiles({
        "gpt-5": "http://same-gateway/v1",
        "text-embedding-3-small": "http://same-gateway/v1",
    })

    import webapp.services.profile_manager as pm_mod
    monkeypatch.setattr(pm_mod.profile_manager, "list_all", lambda: fake_profiles)

    from ragas.llms.base import InstructorBaseRagasLLM
    from ragas.embeddings.base import BaseRagasEmbedding

    with patch("rag_eval.metrics.factory.AsyncOpenAI", side_effect=_FakeClient), \
         patch("rag_eval.metrics.factory.llm_factory", return_value=MagicMock(spec=InstructorBaseRagasLLM)), \
         patch("rag_eval.metrics.factory.embedding_factory", return_value=MagicMock(spec=BaseRagasEmbedding)):
        build_models("gpt-5", "text-embedding-3-small", _settings())

    # Same settings → only one client needed.
    assert len(created_clients) == 1


def test_embedding_factory_receives_embedding_client(monkeypatch):
    """embedding_factory is called with the client resolved from the embedding model's profile."""
    emb_client_ref = []
    llm_client_ref = []

    class _LLMClient:
        label = "llm"
        def __init__(self, **kwargs):
            llm_client_ref.append(self)

    class _EmbClient:
        label = "emb"
        def __init__(self, **kwargs):
            emb_client_ref.append(self)

    fake_profiles = _patch_profiles({
        "gpt-5": "http://llm-gw/v1",
        "Qwen3-Embedding-4B": "https://api.siliconflow.cn/v1",
    })

    import webapp.services.profile_manager as pm_mod
    monkeypatch.setattr(pm_mod.profile_manager, "list_all", lambda: fake_profiles)

    from ragas.llms.base import InstructorBaseRagasLLM
    from ragas.embeddings.base import BaseRagasEmbedding

    emb_factory_calls = []

    def _fake_emb_factory(provider, model, client):
        emb_factory_calls.append({"model": model, "client": client})
        return MagicMock(spec=BaseRagasEmbedding)

    call_count = [0]

    def _client_factory(**kwargs):
        call_count[0] += 1
        if "llm-gw" in kwargs.get("base_url", ""):
            return _LLMClient(**kwargs)
        return _EmbClient(**kwargs)

    with patch("rag_eval.metrics.factory.AsyncOpenAI", side_effect=_client_factory), \
         patch("rag_eval.metrics.factory.llm_factory", return_value=MagicMock(spec=InstructorBaseRagasLLM)), \
         patch("rag_eval.metrics.factory.embedding_factory", side_effect=_fake_emb_factory):
        build_models("gpt-5", "Qwen3-Embedding-4B", _settings())

    assert len(emb_factory_calls) == 1
    # The client passed to embedding_factory must be the siliconflow client, not the LLM client.
    assert isinstance(emb_factory_calls[0]["client"], _EmbClient), (
        "embedding_factory should receive the embedding-model client, not the judge-model client"
    )