#include "random_int.h"

#include <stdexcept>

namespace simdutf {
namespace tests {
namespace helpers {

RandomInt::RandomInt(uint64_t lo, uint64_t hi, uint64_t seed) noexcept
    : gen(std::mt19937::result_type(seed)), distr{lo, hi} {}

uint32_t RandomInt::operator()() noexcept { return uint32_t(distr(gen)); }

RandomIntRanges::RandomIntRanges(
    std::initializer_list<std::pair<uint64_t, uint64_t>> ranges_,
    uint64_t seed) noexcept
    : gen(std::mt19937::result_type(seed)) {

  for (const auto &lohi : ranges_) {
    ranges.emplace_back(lohi.first, lohi.second);
  }

  range_index = Distribution(0, ranges.size() - 1);
}

uint32_t RandomIntRanges::operator()() noexcept {
  const size_t index = size_t(range_index(gen));
  return uint32_t(ranges[index](gen));
}
} // namespace helpers
} // namespace tests
} // namespace simdutf
