/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2015-2022 Advanced Micro Devices, Inc. All rights reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
#include <migraphx/onnx/op_parser.hpp>
#include <migraphx/instruction.hpp>
#include <migraphx/ranges.hpp>
#include <migraphx/make_op.hpp>

namespace migraphx {
inline namespace MIGRAPHX_INLINE_NS {
namespace onnx {

struct parse_scatter : op_parser<parse_scatter>
{
    std::vector<op_desc> operators() const { return {{"ScatterElements"}, {"Scatter"}}; }

    instruction_ref parse(const op_desc& /*opd*/,
                          const onnx_parser& /*parser*/,
                          const onnx_parser::node_info& info,
                          const std::vector<instruction_ref>& args) const
    {
        operation op;

        std::string op_name = "scatter_none";
        int axis            = 0;

        if(contains(info.attributes, "axis"))
            axis = info.attributes.at("axis").i();
        if(contains(info.attributes, "reduction"))
        {
            std::string reduction_att(info.attributes.at("reduction").s());
            // check for a valid reduction attribute.  We have an operator for each one.
            if(not contains({"none", "add", "mul"}, reduction_att))
                MIGRAPHX_THROW("PARSE_SCATTER: unsupported reduction mode " + reduction_att);
            // merge scatter with reduction attribute to specify which scatter operation.  Future
            // reduction op names should follow this pattern and should also be added to the check
            // above.
            op_name = std::string("scatter_") + reduction_att;
        }
        op = migraphx::make_op(op_name, {{"axis", axis}});
        return info.add_instruction(op, args);
    }
};

} // namespace onnx
} // namespace MIGRAPHX_INLINE_NS
} // namespace migraphx
