// Copyright (c) 2023 Huawei Technologies Co., Ltd
// All rights reserved.
//
// Licensed under the BSD 3-Clause License  (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://opensource.org/licenses/BSD-3-Clause
//
// 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.

#include "op_plugin/AclOpsInterface.h"
#include "op_plugin/OpApiInterface.h"
#include "op_plugin/utils/op_api_common.h"

namespace op_api {
using npu_preparation = at_npu::native::OpPreparation;

at::Tensor& cumsum_out(const at::Tensor& self, int64_t dim, c10::optional<at::ScalarType> dtype, at::Tensor& out)
{
    DO_COMPATIBILITY(aclnnCumsum, acl_op::cumsum_out(self, dim, dtype, out));
    npu_preparation::check_tensor({self}, out, self.sizes());

    aclDataType dtype_new = ACL_DT_UNDEFINED;
    if (!dtype.has_value()) {
        dtype_new = npu_preparation::convert_to_acl_data_type(out.scalar_type());
    } else {
        dtype_new = npu_preparation::convert_to_acl_data_type(dtype.value());
    }

    if (self.is_same(out)) {
        auto tmp = npu_preparation::apply_tensor_without_format(self);
        EXEC_NPU_CMD(aclnnCumsum, self, dim, dtype_new, tmp);
        out.copy_(tmp);
    } else {
        EXEC_NPU_CMD(aclnnCumsum, self, dim, dtype_new, out);
    }
    at::namedinference::propagate_names(out, self);
    return out;
}

at::Tensor& cumsum_out(const at::Tensor& self, at::Dimname dim, c10::optional<at::ScalarType> dtype,
                       at::Tensor& out)
{
    DO_COMPATIBILITY(aclnnCumsum, acl_op::cumsum_out(self, dim, dtype, out));
    return op_api::cumsum_out(self, dimname_to_position(self, dim), dtype, out);
}

at::Tensor cumsum(const at::Tensor& self, int64_t dim, c10::optional<at::ScalarType> dtype)
{
    DO_COMPATIBILITY(aclnnCumsum, acl_op::cumsum(self, dim, dtype));

    at::Tensor result;
    aclDataType dtype_new = ACL_DT_UNDEFINED;
    if (dtype.has_value()) {
        result = npu_preparation::apply_tensor_without_format(self.sizes(), self.options().dtype(dtype.value()));
        dtype_new = npu_preparation::convert_to_acl_data_type(dtype.value());
    } else {
        result = at::isFloatingType(self.scalar_type()) || at::isComplexType(self.scalar_type())
                    ? npu_preparation::apply_tensor_without_format(self)
                    : npu_preparation::apply_tensor_without_format(self.sizes(), self.options().dtype(at::kLong));
        dtype_new = npu_preparation::convert_to_acl_data_type(result.scalar_type());
    }

    EXEC_NPU_CMD(aclnnCumsum, self, dim, dtype_new, result);
    at::namedinference::propagate_names(result, self);
    return result;
}
} // namespace op_api