"""
Copyright (c) 2025 by FlashInfer team.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

  http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
"""

from ...compilation_context import CompilationContext
from .. import env as jit_env
from ..core import JitSpec, gen_jit_spec


def gen_selective_state_update_module() -> JitSpec:
    return gen_jit_spec(
        "mamba_selective_state_update",
        [
            jit_env.FLASHINFER_CSRC_DIR / "selective_state_update.cu",
            jit_env.FLASHINFER_CSRC_DIR / "flashinfer_mamba_binding.cu",
        ],
    )


def gen_selective_state_update_sm90_module() -> JitSpec:
    # We use a specialized model for Hopper+ GPUs due to the explicit use
    # of TMA device functions.
    # This supports SM90 (Hopper) and future architectures
    compilation_context = CompilationContext()
    nvcc_flags = compilation_context.get_nvcc_flags_list(
        supported_major_versions=[9, 10, 11, 12]
    )
    nvcc_flags += [
        "-DFLASHINFER_MAMBA_ENABLE_SM90",
    ]

    return gen_jit_spec(
        "mamba_selective_state_update_sm90",
        [
            jit_env.FLASHINFER_CSRC_DIR / "selective_state_update.cu",
            jit_env.FLASHINFER_CSRC_DIR / "flashinfer_mamba_binding.cu",
        ],
        extra_cuda_cflags=nvcc_flags,
    )