// Copyright 2020 Google LLC
//
// 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.

#include <cstddef>

#include <fuzzer/FuzzedDataProvider.h>

#include "spdlog/spdlog.h"
#include "spdlog/sinks/basic_file_sink.h"
#include "spdlog/cfg/argv.h"
#include "spdlog/cfg/env.h"

extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
  if (size == 0) {
    return 0;
  }

  static std::shared_ptr<spdlog::logger> my_logger;
  if (!my_logger.get()) {
    my_logger = spdlog::basic_logger_mt("basic_logger", "/dev/null");
    spdlog::set_default_logger(my_logger);
  }

  FuzzedDataProvider stream(data, size);
  
  std::vector<std::string> strings;
  const unsigned char strsize = stream.ConsumeIntegral<unsigned char>();
  for(unsigned char i=0; i<strsize; i++){
    strings.push_back(stream.ConsumeRandomLengthString());
  }
  std::vector<char*> argvv; argvv.reserve(strsize);
  for(unsigned char i=0; i< strsize; ++i){
    argvv.push_back(const_cast<char*>(strings[i].c_str()));
  }
  
  if(strsize==0) return 0;
  
  const char** argv = (const char**) &argvv[0];
  spdlog::cfg::load_env_levels();
  spdlog::cfg::load_argv_levels(strsize, argv);
  spdlog::info(stream.ConsumeRemainingBytesAsString());
  
  return 0;
}