/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying

   file LICENSE.rst or https://cmake.org/licensing for details.  */

#pragma once

#include <string>

#include <utility>

#include <vector>

#include <cm/string_view>

#include "cmsys/RegularExpression.hxx"

class cmMakefile;

class cmStringReplaceHelper

{

public:

  cmStringReplaceHelper(std::string const& regex, std::string replace_expr,

                        cmMakefile* makefile = nullptr);

  bool IsRegularExpressionValid() const

  {

    return this->RegularExpression.is_valid();

  }

  bool IsReplaceExpressionValid() const

  {

    return this->ValidReplaceExpression;

  }

  bool Replace(cm::string_view input, std::string& output);

  std::string const& GetError() { return this->ErrorString; }

private:

  class RegexReplacement

  {

  public:

    RegexReplacement(char const* s)

      : Number(-1)

      , Value(s)

    {

    }

    RegexReplacement(std::string s)

      : Number(-1)

      , Value(std::move(s))

    {

    }

    RegexReplacement(int n)

      : Number(n)

    {

    }

    RegexReplacement() = default;

    int Number;

    std::string Value;

  };

  void ParseReplaceExpression();

  std::string ErrorString;

  std::string RegExString;

  cmsys::RegularExpression RegularExpression;

  bool ValidReplaceExpression = true;

  std::string ReplaceExpression;

  std::vector<RegexReplacement> Replacements;

  cmMakefile* Makefile = nullptr;

};