#pragma once
#include <cstdint>
#include <string>

#include "CrossPointSettings.h"

// Per-book settings stored in the book's cache directory.
// Fields default to sentinel values (0xFF) meaning "use global setting".
class BookSettings {
 public:
  // 0xFF = use global default; otherwise one of SLEEP_SCREEN_LETTERBOX_FILL values (0-2).
  uint8_t letterboxFillOverride = USE_GLOBAL;

  static constexpr uint8_t USE_GLOBAL = 0xFF;

  // Returns the effective letterbox fill mode: the per-book override if set,
  // otherwise the global setting from CrossPointSettings.
  uint8_t getEffectiveLetterboxFill() const {
    if (letterboxFillOverride != USE_GLOBAL &&
        letterboxFillOverride < CrossPointSettings::SLEEP_SCREEN_LETTERBOX_FILL_COUNT) {
      return letterboxFillOverride;
    }
    return SETTINGS.sleepScreenLetterboxFill;
  }

  static BookSettings load(const std::string& cachePath);
  static bool save(const std::string& cachePath, const BookSettings& settings);

 private:
  static std::string filePath(const std::string& cachePath);
};