/* Copyright 2023 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 <chain.hpp>

#include <combinations.hpp>

#include <compress.hpp>

#include <cycle.hpp>

#include <groupby.hpp>

#include <fuzzer/FuzzedDataProvider.h>

#include <iterator>

#include <string>

#include <utility>

#include <vector>

using iter::chain;

using iter::combinations;

using iter::compress;

using iter::cycle;

using iter::groupby;

void FuzzChained(const uint8_t *data, size_t size) {

  FuzzedDataProvider fdp(data, size);

  std::vector<char> v;

  for (int i = 0; i < fdp.ConsumeIntegralInRange<int>(1, 1024); i++) {

    v.push_back((char)fdp.ConsumeIntegral<char>());

  }

  const auto ch = chain(v, v, v);

  std::vector<char> v2(std::begin(ch), std::end(ch));

}

int length(const std::string &s) { return s.size(); }

void FuzzGroupby(const uint8_t *data, size_t size) {

  FuzzedDataProvider fdp(data, size);

  std::vector<std::string> v;

  for (int i = 0; i < fdp.ConsumeIntegralInRange<int>(1, 1024); i++) {

    v.push_back(fdp.ConsumeRandomLengthString());

  }

  for (auto &&gb : groupby(v, length)) {

  }

}

void FuzzCycle(const uint8_t *data, size_t size) {

  FuzzedDataProvider fdp(data, size);

  std::vector<int> v;

  for (int i = 0; i < fdp.ConsumeIntegralInRange<int>(1, 1024); i++) {

    v.push_back(fdp.ConsumeIntegral<int>());

  }

  auto ch = cycle(v);

  std::vector<int> o;

  size_t count = 0;

  for (auto val : ch) {

    o.push_back(val);

    count++;

    if (count > 1500) {

      break;

    }

  }

}

void FuzzCombinations(const uint8_t *data, size_t size) {

  FuzzedDataProvider fdp(data, size);

  std::string s = fdp.ConsumeRandomLengthString();

  std::vector<std::vector<char>> sc;

  size_t count = 0;

  for (auto &&v : combinations(s, fdp.ConsumeIntegralInRange(1, 16))) {

    sc.emplace_back(std::begin(v), std::end(v));

    count++;

    if (count > 1500) {

      break;

    }

  }

}

void FuzzCompress(const uint8_t *data, size_t size) {

  FuzzedDataProvider fdp(data, size);

  std::vector<int> ivec;

  std::vector<bool> bvec;

  for (int i = 0; i < 100; i++) {

    ivec.push_back(fdp.ConsumeIntegralInRange(1, 1000000));

    bvec.push_back(fdp.ConsumeBool());

  }

  auto c = compress(ivec, bvec);

  std::vector<int> v(std::begin(c), std::end(c));

  const auto &c2 = c;

  (void)(std::begin(c) == std::end(c2));

}

extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {

  FuzzChained(data, size);

  FuzzGroupby(data, size);

  FuzzCycle(data, size);

  FuzzCombinations(data, size);

  FuzzCompress(data, size);

  return 0;

}