#ifndef HELPERS_SPY_INPUT_H_
#define HELPERS_SPY_INPUT_H_

#include <string>
#include <vector>
#include "tree_sitter/runtime.h"

struct SpyInputEdit {
  size_t start_byte;
  size_t bytes_removed;
  std::string text_inserted;
};

class SpyInput {
  uint32_t chars_per_chunk;
  uint32_t buffer_size;
  char *buffer;
  uint32_t byte_offset;
  std::vector<SpyInputEdit> undo_stack;

  static const char * read(void *, uint32_t *);
  static int seek(void *, uint32_t, uint32_t);
  std::pair<std::string, TSPoint> swap_substr(size_t, size_t, std::string);

 public:
  SpyInput(std::string content, size_t chars_per_chunk);
  ~SpyInput();

  TSInput input();
  void clear();
  TSInputEdit replace(size_t start_char, size_t chars_removed, std::string text);
  TSInputEdit undo();
  std::vector<std::string> strings_read() const;

  std::string content;
  TSInputEncoding encoding;
  std::vector<std::pair<uint32_t, uint32_t>> ranges_read;
};

#endif  // HELPERS_SPY_INPUT_H_