#pragma once

#include <optional>
#include <regex.h>
#include <string>
#include <vector>

#include "sedpp/Options.h"

namespace sedpp {

struct Match {
  std::vector<regmatch_t> groups;
};

// Small RAII wrapper for POSIX regex_t.  POSIX regex reports match offsets
// relative to the searched pointer, so search() rebases groups to the original
// subject string before returning.
class Regex {
public:
  Regex(const std::string &pattern, const Options &options,
        bool ignoreCase = false, bool multiline = false);
  Regex(const Regex &) = delete;
  Regex &operator=(const Regex &) = delete;
  Regex(Regex &&other) noexcept;
  Regex &operator=(Regex &&other) noexcept;
  ~Regex();

  [[nodiscard]] std::optional<Match> search(const std::string &text,
                                            std::size_t start = 0) const;

private:
  regex_t regex_{};
  bool compiled_ = false;
};

} // namespace sedpp