import pytest

from testing_utils import require_backend_async

# These tests do not pass on ROCm, that does not support head_dim > 128 (2b model is 256).


@pytest.fixture(scope="module")
def flash_gemma_handle(launcher):
    with launcher("google/gemma-2b", num_shard=1) as handle:
        yield handle


@pytest.fixture(scope="module")
async def flash_gemma(flash_gemma_handle):
    await flash_gemma_handle.health(300)
    return flash_gemma_handle.client


@pytest.mark.release
@pytest.mark.asyncio
@pytest.mark.private
@require_backend_async("cuda", "xpu")
async def test_flash_gemma(flash_gemma, response_snapshot):
    response = await flash_gemma.generate(
        "Test request", max_new_tokens=10, decoder_input_details=True
    )

    assert response.details.generated_tokens == 10
    assert response == response_snapshot


@pytest.mark.release
@pytest.mark.asyncio
@pytest.mark.private
@require_backend_async("cuda", "xpu")
async def test_flash_gemma_all_params(flash_gemma, response_snapshot):
    response = await flash_gemma.generate(
        "Test request",
        max_new_tokens=10,
        repetition_penalty=1.2,
        return_full_text=True,
        stop_sequences=["test"],
        temperature=0.5,
        top_p=0.9,
        top_k=10,
        truncate=5,
        typical_p=0.9,
        watermark=True,
        decoder_input_details=True,
        seed=0,
    )

    assert response.details.generated_tokens == 10
    assert response == response_snapshot


@pytest.mark.release
@pytest.mark.asyncio
@pytest.mark.private
@require_backend_async("cuda", "xpu")
async def test_flash_gemma_load(flash_gemma, generate_load, response_snapshot):
    responses = await generate_load(flash_gemma, "Test request", max_new_tokens=10, n=4)

    assert len(responses) == 4
    assert all([r.generated_text == responses[0].generated_text for r in responses])

    assert responses == response_snapshot