#pragma once
#include <cstdint>
#include <iosfwd>

// Forward declarations
class FsFile;

class CrossPointSettings {
 private:
  // Private constructor for singleton
  CrossPointSettings() = default;

  // Static instance
  static CrossPointSettings instance;

 public:
  // Delete copy constructor and assignment
  CrossPointSettings(const CrossPointSettings&) = delete;
  CrossPointSettings& operator=(const CrossPointSettings&) = delete;

  enum SLEEP_SCREEN_MODE {
    DARK = 0,
    LIGHT = 1,
    CUSTOM = 2,
    COVER = 3,
    BLANK = 4,
    COVER_CUSTOM = 5,
    SLEEP_SCREEN_MODE_COUNT
  };
  enum SLEEP_SCREEN_COVER_MODE { FIT = 0, CROP = 1, SLEEP_SCREEN_COVER_MODE_COUNT };
  enum SLEEP_SCREEN_COVER_FILTER {
    NO_FILTER = 0,
    BLACK_AND_WHITE = 1,
    INVERTED_BLACK_AND_WHITE = 2,
    SLEEP_SCREEN_COVER_FILTER_COUNT
  };
  enum SLEEP_SCREEN_LETTERBOX_FILL {
    LETTERBOX_DITHERED = 0,
    LETTERBOX_SOLID = 1,
    LETTERBOX_NONE = 2,
    SLEEP_SCREEN_LETTERBOX_FILL_COUNT
  };

  // Status bar display type enum
  enum STATUS_BAR_MODE {
    NONE = 0,
    NO_PROGRESS = 1,
    FULL = 2,
    BOOK_PROGRESS_BAR = 3,
    ONLY_BOOK_PROGRESS_BAR = 4,
    CHAPTER_PROGRESS_BAR = 5,
    STATUS_BAR_MODE_COUNT
  };

  enum INDEXING_DISPLAY {
    INDEXING_POPUP = 0,
    INDEXING_STATUS_TEXT = 1,
    INDEXING_STATUS_ICON = 2,
    INDEXING_DISPLAY_COUNT
  };

  enum ORIENTATION {
    PORTRAIT = 0,       // 480x800 logical coordinates (current default)
    LANDSCAPE_CW = 1,   // 800x480 logical coordinates, rotated 180° (swap top/bottom)
    INVERTED = 2,       // 480x800 logical coordinates, inverted
    LANDSCAPE_CCW = 3,  // 800x480 logical coordinates, native panel orientation
    ORIENTATION_COUNT
  };

  // Front button layout options (legacy)
  // Default: Back, Confirm, Left, Right
  // Swapped: Left, Right, Back, Confirm
  enum FRONT_BUTTON_LAYOUT {
    BACK_CONFIRM_LEFT_RIGHT = 0,
    LEFT_RIGHT_BACK_CONFIRM = 1,
    LEFT_BACK_CONFIRM_RIGHT = 2,
    BACK_CONFIRM_RIGHT_LEFT = 3,
    FRONT_BUTTON_LAYOUT_COUNT
  };

  // Front button hardware identifiers (for remapping)
  enum FRONT_BUTTON_HARDWARE {
    FRONT_HW_BACK = 0,
    FRONT_HW_CONFIRM = 1,
    FRONT_HW_LEFT = 2,
    FRONT_HW_RIGHT = 3,
    FRONT_BUTTON_HARDWARE_COUNT
  };

  // Side button layout options
  // Default: Previous, Next
  // Swapped: Next, Previous
  enum SIDE_BUTTON_LAYOUT { PREV_NEXT = 0, NEXT_PREV = 1, SIDE_BUTTON_LAYOUT_COUNT };

  // Font family options
  enum FONT_FAMILY { BOOKERLY = 0, NOTOSANS = 1, OPENDYSLEXIC = 2, FONT_FAMILY_COUNT };
  // Font size options
  enum FONT_SIZE { SMALL = 0, MEDIUM = 1, LARGE = 2, EXTRA_LARGE = 3, FONT_SIZE_COUNT };
  enum LINE_COMPRESSION { TIGHT = 0, NORMAL = 1, WIDE = 2, LINE_COMPRESSION_COUNT };
  enum PARAGRAPH_ALIGNMENT {
    JUSTIFIED = 0,
    LEFT_ALIGN = 1,
    CENTER_ALIGN = 2,
    RIGHT_ALIGN = 3,
    BOOK_STYLE = 4,
    PARAGRAPH_ALIGNMENT_COUNT
  };

  // Auto-sleep timeout options (in minutes)
  enum SLEEP_TIMEOUT {
    SLEEP_1_MIN = 0,
    SLEEP_5_MIN = 1,
    SLEEP_10_MIN = 2,
    SLEEP_15_MIN = 3,
    SLEEP_30_MIN = 4,
    SLEEP_TIMEOUT_COUNT
  };

  // E-ink refresh frequency (pages between full refreshes)
  enum REFRESH_FREQUENCY {
    REFRESH_1 = 0,
    REFRESH_5 = 1,
    REFRESH_10 = 2,
    REFRESH_15 = 3,
    REFRESH_30 = 4,
    REFRESH_FREQUENCY_COUNT
  };

  // Short power button press actions
  enum SHORT_PWRBTN { IGNORE = 0, SLEEP = 1, PAGE_TURN = 2, SHORT_PWRBTN_COUNT };

  // Hide battery percentage
  enum HIDE_BATTERY_PERCENTAGE { HIDE_NEVER = 0, HIDE_READER = 1, HIDE_ALWAYS = 2, HIDE_BATTERY_PERCENTAGE_COUNT };

  // UI Theme
  enum UI_THEME { CLASSIC = 0, LYRA = 1 };

  // Home screen clock format
  enum CLOCK_FORMAT { CLOCK_OFF = 0, CLOCK_AMPM = 1, CLOCK_24H = 2, CLOCK_FORMAT_COUNT };

  // Clock size
  enum CLOCK_SIZE { CLOCK_SIZE_SMALL = 0, CLOCK_SIZE_MEDIUM = 1, CLOCK_SIZE_LARGE = 2, CLOCK_SIZE_COUNT };

  // Timezone presets
  enum TIMEZONE {
    TZ_UTC = 0,
    TZ_EASTERN = 1,
    TZ_CENTRAL = 2,
    TZ_MOUNTAIN = 3,
    TZ_PACIFIC = 4,
    TZ_ALASKA = 5,
    TZ_HAWAII = 6,
    TZ_CUSTOM = 7,
    TZ_COUNT
  };

  // Sleep screen settings
  uint8_t sleepScreen = DARK;
  // Sleep screen cover mode settings
  uint8_t sleepScreenCoverMode = FIT;
  // Sleep screen cover filter
  uint8_t sleepScreenCoverFilter = NO_FILTER;
  // Sleep screen letterbox fill mode (Dithered / Solid / None)
  uint8_t sleepScreenLetterboxFill = LETTERBOX_DITHERED;
  // Status bar settings
  uint8_t statusBar = FULL;
  // Indexing feedback display mode (popup, status bar text, status bar icon)
  uint8_t indexingDisplay = INDEXING_POPUP;
  // Text rendering settings
  uint8_t extraParagraphSpacing = 1;
  uint8_t textAntiAliasing = 1;
  // Short power button click behaviour
  uint8_t shortPwrBtn = IGNORE;
  // EPUB reading orientation settings
  // 0 = portrait (default), 1 = landscape clockwise, 2 = inverted, 3 = landscape counter-clockwise
  uint8_t orientation = PORTRAIT;
  // Button layouts (front layout retained for migration only)
  uint8_t frontButtonLayout = BACK_CONFIRM_LEFT_RIGHT;
  uint8_t sideButtonLayout = PREV_NEXT;
  // Front button remap (logical -> hardware)
  // Used by MappedInputManager to translate logical buttons into physical front buttons.
  uint8_t frontButtonBack = FRONT_HW_BACK;
  uint8_t frontButtonConfirm = FRONT_HW_CONFIRM;
  uint8_t frontButtonLeft = FRONT_HW_LEFT;
  uint8_t frontButtonRight = FRONT_HW_RIGHT;
  // Reader font settings
  uint8_t fontFamily = BOOKERLY;
  uint8_t fontSize = MEDIUM;
  uint8_t lineSpacing = NORMAL;
  uint8_t paragraphAlignment = JUSTIFIED;
  // Auto-sleep timeout setting (default 10 minutes)
  uint8_t sleepTimeout = SLEEP_10_MIN;
  // E-ink refresh frequency (default 15 pages)
  uint8_t refreshFrequency = REFRESH_15;
  uint8_t hyphenationEnabled = 0;

  // Reader screen margin settings
  uint8_t screenMargin = 5;
  // OPDS browser settings
  char opdsServerUrl[128] = "";
  char opdsUsername[64] = "";
  char opdsPassword[64] = "";
  // Hide battery percentage
  uint8_t hideBatteryPercentage = HIDE_NEVER;
  // Long-press chapter skip on side buttons
  uint8_t longPressChapterSkip = 1;
  // UI Theme
  uint8_t uiTheme = LYRA;
  // Sunlight fading compensation
  uint8_t fadingFix = 0;
  // Use book's embedded CSS styles for EPUB rendering (1 = enabled, 0 = disabled)
  uint8_t embeddedStyle = 1;

  // Preferred orientations for the portrait/landscape toggle in the reader menu.
  // preferredPortrait: PORTRAIT (0) or INVERTED (2)
  // preferredLandscape: LANDSCAPE_CW (1) or LANDSCAPE_CCW (3)
  uint8_t preferredPortrait = PORTRAIT;
  uint8_t preferredLandscape = LANDSCAPE_CW;

  // Clock display format (OFF by default)
  uint8_t clockFormat = CLOCK_OFF;
  // Clock display size
  uint8_t clockSize = CLOCK_SIZE_SMALL;

  // Timezone setting
  uint8_t timezone = TZ_UTC;
  // Custom timezone offset in hours from UTC (-12 to +14)
  int8_t timezoneOffsetHours = 0;

  ~CrossPointSettings() = default;

  // Get singleton instance
  static CrossPointSettings& getInstance() { return instance; }

  uint16_t getPowerButtonDuration() const {
    return (shortPwrBtn == CrossPointSettings::SHORT_PWRBTN::SLEEP) ? 10 : 400;
  }
  int getReaderFontId() const;

  // If count_only is true, returns the number of settings items that would be written.
  uint8_t writeSettings(FsFile& file, bool count_only = false) const;

  bool saveToFile() const;
  bool loadFromFile();

  float getReaderLineCompression() const;
  unsigned long getSleepTimeoutMs() const;
  int getRefreshFrequency() const;
  const char* getTimezonePosixStr() const;
};

// Helper macro to access settings
#define SETTINGS CrossPointSettings::getInstance()