import pytest

from multi_swarm.genome.hypothesis import HypothesisAgentGenome, ModelTier
from multi_swarm.llm.client import CompletionResult, LLMClient


def make_genome(tier: ModelTier) -> HypothesisAgentGenome:
    return HypothesisAgentGenome(
        system_prompt="x",
        feature_access=["close"],
        temperature=0.9,
        top_p=0.95,
        model_tier=tier,
        lookback_window=200,
        cognitive_style="physicist",
    )


def test_completion_tier_c_uses_openrouter(mocker):
    fake_openai = mocker.MagicMock()
    fake_response = mocker.MagicMock()
    fake_response.choices = [mocker.MagicMock(message=mocker.MagicMock(content="(strategy ...)"))]
    fake_response.usage = mocker.MagicMock(prompt_tokens=100, completion_tokens=200)
    fake_openai.chat.completions.create.return_value = fake_response

    mocker.patch("multi_swarm.llm.client.OpenAI", return_value=fake_openai)

    client = LLMClient(openrouter_api_key="or-x", anthropic_api_key=None)
    g = make_genome(ModelTier.C)
    out = client.complete(g, system="sys", user="usr")

    assert isinstance(out, CompletionResult)
    assert out.text == "(strategy ...)"
    assert out.input_tokens == 100
    assert out.output_tokens == 200
    assert out.tier == ModelTier.C
    fake_openai.chat.completions.create.assert_called_once()


def test_completion_tier_b_uses_anthropic(mocker):
    fake_anthropic = mocker.MagicMock()
    fake_msg = mocker.MagicMock()
    fake_msg.content = [mocker.MagicMock(text="(strategy ...)")]
    fake_msg.usage = mocker.MagicMock(input_tokens=80, output_tokens=150)
    fake_anthropic.messages.create.return_value = fake_msg
    mocker.patch("multi_swarm.llm.client.Anthropic", return_value=fake_anthropic)

    client = LLMClient(openrouter_api_key="or-x", anthropic_api_key="an-x")
    g = make_genome(ModelTier.B)
    out = client.complete(g, system="sys", user="usr")

    assert out.text == "(strategy ...)"
    assert out.input_tokens == 80
    assert out.output_tokens == 150
    assert out.tier == ModelTier.B


@pytest.mark.slow
def test_completion_retries_on_connection_error(mocker):
    """Retry esegue 3 tentativi su APIConnectionError, poi rilancia."""
    import openai

    fake_openai = mocker.MagicMock()
    fake_openai.chat.completions.create.side_effect = openai.APIConnectionError(
        request=mocker.MagicMock()
    )
    mocker.patch("multi_swarm.llm.client.OpenAI", return_value=fake_openai)

    client = LLMClient(openrouter_api_key="or-x", anthropic_api_key=None)
    g = make_genome(ModelTier.C)

    with pytest.raises(openai.APIConnectionError):
        client.complete(g, system="sys", user="usr")

    assert fake_openai.chat.completions.create.call_count == 3


@pytest.mark.slow
def test_completion_succeeds_after_one_retry(mocker):
    """Dopo 1 fallimento transient, il retry riesce al 2 tentativo."""
    import openai

    fake_response = mocker.MagicMock()
    fake_response.choices = [
        mocker.MagicMock(message=mocker.MagicMock(content="(strategy ...)"))
    ]
    fake_response.usage = mocker.MagicMock(prompt_tokens=100, completion_tokens=200)

    fake_openai = mocker.MagicMock()
    fake_openai.chat.completions.create.side_effect = [
        openai.APITimeoutError(request=mocker.MagicMock()),
        fake_response,
    ]
    mocker.patch("multi_swarm.llm.client.OpenAI", return_value=fake_openai)

    client = LLMClient(openrouter_api_key="or-x", anthropic_api_key=None)
    g = make_genome(ModelTier.C)
    out = client.complete(g, system="sys", user="usr")

    assert isinstance(out, CompletionResult)
    assert out.text == "(strategy ...)"
    assert fake_openai.chat.completions.create.call_count == 2