#pragma once

#include <iosfwd>
#include <string>
#include <unordered_map>
#include <unordered_set>
#include <unordered_map>

#include "sedpp/Options.h"

namespace sedpp {

// Centralizes delimiter-aware writes.  Most commands emit either pattern space
// plus its original delimiter bit, or synthetic lines that always end in the
// active delimiter.
class Output {
public:
  Output(const Options &options, std::ostream &stream);

  void write(const std::string &text);
  void writeDelimiter(bool hadDelimiter);
  void writeLine(const std::string &text);
  void writePattern(const std::string &pattern, bool hadDelimiter);
  void writeEscaped(const std::string &pattern, bool hadDelimiter, int width);
  void writeFile(const std::string &path, const std::string &text,
                 bool hadDelimiter);

private:
  // Pending delimiters defer the trailing separator for unterminated records
  // until another write proves that a separator is needed between outputs.
  void writePendingDelimiter(std::ostream &target, bool &pending);
  char delimiter() const;

  const Options &options_;
  std::ostream &stream_;
  bool pendingDelimiter_ = false;
  std::unordered_map<std::string, bool> pendingFileDelimiter_;
  std::unordered_set<std::string> openedWriteFiles_;
};

} // namespace sedpp