#pragma once

#include <Arduino.h>
#include <vector>

struct Token {
  uint32_t offset;
  uint16_t length;
  uint32_t paragraph;
};

class Reader {
 public:
  bool load(const String& book);
  void restoreAtParagraphStart(uint32_t savedWord);
  const String currentWord() const;
  bool advance();
  bool previousParagraph();
  bool nextParagraph();
  uint32_t currentIndex() const;
  uint32_t delayMs(uint16_t wpm) const;

 private:
  String book_;
  std::vector<Token> tokens_;
  std::vector<uint32_t> paragraphStarts_;
  uint32_t index_ = 0;
};