#include "simdjson/jsonparser.h"
#ifndef _MSC_VER
#include "linux-perf-events.h"
#include <unistd.h>
#ifdef __linux__
#include <libgen.h>
#endif //__linux__
#endif // _MSC_VER

#include <memory>

#include "benchmark.h"

// #define RAPIDJSON_SSE2 // bad for performance
// #define RAPIDJSON_SSE42 // bad for performance
#include "rapidjson/document.h"
#include "rapidjson/reader.h"
#include "rapidjson/stringbuffer.h"
#include "rapidjson/writer.h"

#include "sajson.h"

#include <nlohmann/json.hpp>
using json = nlohmann::json;

#ifdef ALLPARSER

#include "fastjson.cpp"
#include "fastjson_dom.cpp"
#include "gason.cpp"

#include "json11.cpp"
extern "C" {
#include "cJSON.c"
#include "cJSON.h"
#include "jsmn.c"
#include "jsmn.h"
#include "ujdecode.h"
#include "ultrajsondec.c"
}

#include "jsoncpp.cpp"
#include "json/json.h"

#endif

using namespace rapidjson;

#ifdef ALLPARSER
// fastjson has a tricky interface
void on_json_error(void *, const fastjson::ErrorContext &ec) {
  // std::cerr<<"ERROR: "<<ec.mesg<<std::endl;
}
bool fastjson_parse(const char *input) {
  fastjson::Token token;
  fastjson::dom::Chunk chunk;
  return fastjson::dom::parse_string(input, &token, &chunk, 0, &on_json_error,
                                     NULL);
}
// end of fastjson stuff
#endif

size_t sum_line_lengths(char * data, size_t length) {
  std::stringstream is;
  is.rdbuf()->pubsetbuf(data, length);
  std::string line;
  size_t sumofalllinelengths{0};
  while(getline(is, line)) {
    sumofalllinelengths += line.size();
  }
  return sumofalllinelengths;
}


int main(int argc, char *argv[]) {
  bool verbose = false;
  bool just_data = false;
  int c;
  while ((c = getopt(argc, argv, "vt")) != -1)
    switch (c) {
    case 't':
      just_data = true;
      break;
    case 'v':
      verbose = true;
      break;
    default:
      abort();
    }
  if (optind >= argc) {
    std::cerr << "Usage: " << argv[0] << " <jsonfile>" << std::endl;
    std::cerr << "Or " << argv[0] << " -v <jsonfile>" << std::endl;
    std::cerr << "The '-t' flag outputs a table. " << std::endl;
    exit(1);
  }
  const char *filename = argv[optind];
  if (optind + 1 < argc) {
    std::cerr << "warning: ignoring everything after " << argv[optind + 1]
              << std::endl;
  }
  simdjson::padded_string p;
  try {
    simdjson::get_corpus(filename).swap(p);
  } catch (const std::exception &e) { // caught by reference to base
    std::cout << "Could not load the file " << filename << std::endl;
    return EXIT_FAILURE;
  }

  if (verbose) {
    std::cout << "Input has ";
    if (p.size() > 1024 * 1024)
      std::cout << p.size() / (1024 * 1024) << " MB ";
    else if (p.size() > 1024)
      std::cout << p.size() / 1024 << " KB ";
    else
      std::cout << p.size() << " B ";
    std::cout << std::endl;
  }
  simdjson::ParsedJson pj;
  bool allocok = pj.allocate_capacity(p.size(), 1024);

  if (!allocok) {
    std::cerr << "can't allocate memory" << std::endl;
    return EXIT_FAILURE;
  }
  int repeat = (p.size() < 1 * 1000 * 1000 ? 1000 : 10);
  int volume = p.size();
  if (just_data) {
    printf("%-42s %20s %20s %20s %20s \n", "name", "cycles_per_byte",
           "cycles_per_byte_err", "gb_per_s", "gb_per_s_err");
  }
  if (!just_data) {
    size_t lc = sum_line_lengths(p.data(), p.size());
    BEST_TIME("getline ",sum_line_lengths(p.data(), p.size()) , lc, , 
       repeat, volume, !just_data);
  }
 
  if (!just_data)
    BEST_TIME("simdjson (dynamic mem) ", build_parsed_json(p).is_valid(), true,
              , repeat, volume, !just_data);
  // (static alloc)
  BEST_TIME("simdjson ", json_parse(p, pj), simdjson::SUCCESS, , repeat, volume,
            !just_data);

  rapidjson::Document d;

  char *buffer = (char *)malloc(p.size() + 1);
  memcpy(buffer, p.data(), p.size());
  buffer[p.size()] = '\0';
#ifndef ALLPARSER
  if (!just_data)
#endif
    BEST_TIME("RapidJSON  ",
              d.Parse<kParseValidateEncodingFlag>((const char *)buffer)
                  .HasParseError(),
              false, memcpy(buffer, p.data(), p.size()), repeat, volume,
              !just_data);
  BEST_TIME("RapidJSON (insitu)",
            d.ParseInsitu<kParseValidateEncodingFlag>(buffer).HasParseError(),
            false,
            memcpy(buffer, p.data(), p.size()) && (buffer[p.size()] = '\0'),
            repeat, volume, !just_data);
#ifndef ALLPARSER
  if (!just_data)
#endif
    BEST_TIME("sajson (dynamic mem)",
              sajson::parse(sajson::dynamic_allocation(),
                            sajson::mutable_string_view(p.size(), buffer))
                  .is_valid(),
              true, memcpy(buffer, p.data(), p.size()), repeat, volume,
              !just_data);

  size_t ast_buffer_size = p.size();
  size_t *ast_buffer = (size_t *)malloc(ast_buffer_size * sizeof(size_t));
  //  (static alloc, insitu)
  BEST_TIME(
      "sajson",
      sajson::parse(sajson::bounded_allocation(ast_buffer, ast_buffer_size),
                    sajson::mutable_string_view(p.size(), buffer))
          .is_valid(),
      true, memcpy(buffer, p.data(), p.size()), repeat, volume, !just_data);
  size_t expected = json::parse(p.data(), p.data() + p.size()).size();
  BEST_TIME("nlohmann-json", json::parse(buffer, buffer + p.size()).size(),
            expected, memcpy(buffer, p.data(), p.size()), repeat, volume,
            !just_data);

#ifdef ALLPARSER
  std::string json11err;
  BEST_TIME("dropbox (json11)     ",
            ((json11::Json::parse(buffer, json11err).is_null()) ||
             (!json11err.empty())),
            false, memcpy(buffer, p.data(), p.size()), repeat, volume,
            !just_data);

  BEST_TIME("fastjson             ", fastjson_parse(buffer), true,
            memcpy(buffer, p.data(), p.size()), repeat, volume, !just_data);
  JsonValue value;
  JsonAllocator allocator;
  char *endptr;
  BEST_TIME("gason             ", jsonParse(buffer, &endptr, &value, allocator),
            JSON_OK, memcpy(buffer, p.data(), p.size()), repeat, volume,
            !just_data);
  void *state;
  BEST_TIME("ultrajson         ",
            (UJDecode(buffer, p.size(), NULL, &state) == NULL), false,
            memcpy(buffer, p.data(), p.size()), repeat, volume, !just_data);

  {
    std::unique_ptr<jsmntok_t[]> tokens =
        std::make_unique<jsmntok_t[]>(p.size());
    jsmn_parser parser;
    jsmn_init(&parser);
    memcpy(buffer, p.data(), p.size());
    buffer[p.size()] = '\0';
    BEST_TIME(
        "jsmn           ",
        (jsmn_parse(&parser, buffer, p.size(), tokens.get(), p.size()) > 0),
        true, jsmn_init(&parser), repeat, volume, !just_data);
  }
  memcpy(buffer, p.data(), p.size());
  buffer[p.size()] = '\0';
  cJSON *tree = cJSON_Parse(buffer);
  BEST_TIME("cJSON           ", ((tree = cJSON_Parse(buffer)) != NULL), true,
            cJSON_Delete(tree), repeat, volume, !just_data);
  cJSON_Delete(tree);

  Json::CharReaderBuilder b;
  Json::CharReader *json_cpp_reader = b.newCharReader();
  Json::Value root;
  Json::String errs;
  BEST_TIME("jsoncpp           ",
            json_cpp_reader->parse(buffer, buffer + volume, &root, &errs), true,
            , repeat, volume, !just_data);
  delete json_cpp_reader;
#endif
  if (!just_data)
    BEST_TIME("memcpy            ",
              (memcpy(buffer, p.data(), p.size()) == buffer), true, , repeat,
              volume, !just_data);
#ifdef __linux__
  if (!just_data) {
    printf("\n \n <doing additional analysis with performance counters (Linux "
           "only)>\n");
    std::vector<int> evts;
    evts.push_back(PERF_COUNT_HW_CPU_CYCLES);
    evts.push_back(PERF_COUNT_HW_INSTRUCTIONS);
    evts.push_back(PERF_COUNT_HW_BRANCH_MISSES);
    evts.push_back(PERF_COUNT_HW_CACHE_REFERENCES);
    evts.push_back(PERF_COUNT_HW_CACHE_MISSES);
    LinuxEvents<PERF_TYPE_HARDWARE> unified(evts);
    std::vector<unsigned long long> results;
    std::vector<unsigned long long> stats;
    results.resize(evts.size());
    stats.resize(evts.size());
    std::fill(stats.begin(), stats.end(), 0); // unnecessary
    for (int i = 0; i < repeat; i++) {
      unified.start();
      if (json_parse(p, pj) != simdjson::SUCCESS)
        printf("bug\n");
      unified.end(results);
      std::transform(stats.begin(), stats.end(), results.begin(), stats.begin(),
                     std::plus<unsigned long long>());
    }
    printf("simdjson : cycles %10.0f instructions %10.0f branchmisses %10.0f "
           "cacheref %10.0f cachemisses %10.0f  bytespercachemiss %10.0f "
           "inspercycle %10.1f insperbyte %10.1f\n",
           stats[0] * 1.0 / repeat, stats[1] * 1.0 / repeat,
           stats[2] * 1.0 / repeat, stats[3] * 1.0 / repeat,
           stats[4] * 1.0 / repeat, volume * repeat * 1.0 / stats[2],
           stats[1] * 1.0 / stats[0], stats[1] * 1.0 / (volume * repeat));

    std::fill(stats.begin(), stats.end(), 0);
    for (int i = 0; i < repeat; i++) {
      memcpy(buffer, p.data(), p.size());
      buffer[p.size()] = '\0';
      unified.start();
      if (d.ParseInsitu<kParseValidateEncodingFlag>(buffer).HasParseError() !=
          false)
        printf("bug\n");
      unified.end(results);
      std::transform(stats.begin(), stats.end(), results.begin(), stats.begin(),
                     std::plus<unsigned long long>());
    }
    printf("RapidJSON: cycles %10.0f instructions %10.0f branchmisses %10.0f "
           "cacheref %10.0f cachemisses %10.0f  bytespercachemiss %10.0f "
           "inspercycle %10.1f insperbyte %10.1f\n",
           stats[0] * 1.0 / repeat, stats[1] * 1.0 / repeat,
           stats[2] * 1.0 / repeat, stats[3] * 1.0 / repeat,
           stats[4] * 1.0 / repeat, volume * repeat * 1.0 / stats[2],
           stats[1] * 1.0 / stats[0], stats[1] * 1.0 / (volume * repeat));

    std::fill(stats.begin(), stats.end(), 0); // unnecessary
    for (int i = 0; i < repeat; i++) {
      memcpy(buffer, p.data(), p.size());
      unified.start();
      if (sajson::parse(sajson::bounded_allocation(ast_buffer, ast_buffer_size),
                        sajson::mutable_string_view(p.size(), buffer))
              .is_valid() != true)
        printf("bug\n");
      unified.end(results);
      std::transform(stats.begin(), stats.end(), results.begin(), stats.begin(),
                     std::plus<unsigned long long>());
    }
    printf("sajson   : cycles %10.0f instructions %10.0f branchmisses %10.0f "
           "cacheref %10.0f cachemisses %10.0f  bytespercachemiss %10.0f "
           "inspercycle %10.1f insperbyte %10.1f\n",
           stats[0] * 1.0 / repeat, stats[1] * 1.0 / repeat,
           stats[2] * 1.0 / repeat, stats[3] * 1.0 / repeat,
           stats[4] * 1.0 / repeat, volume * repeat * 1.0 / stats[2],
           stats[1] * 1.0 / stats[0], stats[1] * 1.0 / (volume * repeat));
  }
#endif //  __linux__

  free(ast_buffer);
  free(buffer);
}