/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 */

/*
 * Copyright (c) 2019 The Pybind Development Team. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 *
 * 3. Neither the name of the copyright holder nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 * You are under no obligation whatsoever to provide any bug fixes, patches, or
 * upgrades to the features, functionality or performance of the source code
 * ("Enhancements") to anyone; however, if you choose to make your Enhancements
 * available either publicly, or directly to the author of this software,
 * without imposing a separate written license agreement for such Enhancements,
 * then you hereby grant the following license: a non-exclusive, royalty-free
 * perpetual license to install, use, modify, prepare derivative works,
 * incorporate into other computer software, distribute, and sublicense such
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 */

#include "service/kv_service/py_verificator.h"

#include <glog/logging.h>
#include <pybind11/embed.h>

namespace py = pybind11;
using namespace py::literals;

namespace sdk {

PYVerificator::PYVerificator() {
  py::initialize_interpreter();
  py::exec(R"(
      import json
    )");
}

PYVerificator::~PYVerificator() { py::finalize_interpreter(); }

// Validate transactions committed by the Python SDK
bool PYVerificator::Validate(const std::string &transaction) {
  auto locals = py::dict("transaction"_a = transaction);

  py::exec(R"(
    from service.sdk_validator.validator import is_valid_tx

    try:
      txn_dict = json.loads(transaction)
      ret = is_valid_tx(txn_dict)
      is_valid = ret[0] == 0
    except (KeyError, AttributeError, ValueError):
      is_valid = False
  )",
           py::globals(), locals);

  return locals["is_valid"].cast<bool>();
}

}  // namespace sdk
