#pragma once
#include <HalStorage.h>

#include <cstdint>
#include <iosfwd>
#include <mutex>

class CrossPointSettings {
 private:
  mutable std::mutex _mutex;

  // 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;

  // Access the settings mutex for protecting multi-field reads/writes from other cores.
  // Callers must not re-enter SETTINGS methods that lock _mutex while holding it.
  std::mutex& getMutex() const { return _mutex; }

  enum SLEEP_SCREEN_MODE {
    DARK = 0,
    LIGHT = 1,
    CUSTOM = 2,
    COVER = 3,
    COVER_CUSTOM = 4,
    BLANK = 5,
    QUICK_RESUME = 6,
    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
  };

  // Status bar enum - legacy
  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 STATUS_BAR_PROGRESS_BAR {
    BOOK_PROGRESS = 0,
    CHAPTER_PROGRESS = 1,
    HIDE_PROGRESS = 2,
    STATUS_BAR_PROGRESS_BAR_COUNT
  };
  enum STATUS_BAR_PROGRESS_BAR_THICKNESS {
    PROGRESS_BAR_THIN = 0,
    PROGRESS_BAR_NORMAL = 1,
    PROGRESS_BAR_THICK = 2,
    STATUS_BAR_PROGRESS_BAR_THICKNESS_COUNT
  };
  enum STATUS_BAR_TITLE { BOOK_TITLE = 0, CHAPTER_TITLE = 1, HIDE_TITLE = 2, STATUS_BAR_TITLE_COUNT };
  enum XTC_STATUS_BAR_MODE {
    XTC_STATUS_BAR_HIDE = 0,
    XTC_STATUS_BAR_BOTTOM = 1,
    XTC_STATUS_BAR_TOP = 2,
    XTC_STATUS_BAR_MODE_COUNT
  };

  enum STATUS_BAR_CLOCK_MODE { STATUS_BAR_CLOCK_HIDE = 0, STATUS_BAR_CLOCK_RIGHT = 1, STATUS_BAR_CLOCK_LEFT = 2 };

  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: Up = Previous, Down = Next
  enum SIDE_BUTTON_LAYOUT { PREV_NEXT = 0, NEXT_PREV = 1, SIDE_BUTTONS_DISABLED = 2, SIDE_BUTTON_LAYOUT_COUNT };

  // Font family options (built-in fonts only; SD card fonts use sdFontFamilyName)
  enum FONT_FAMILY { NOTOSERIF = 0, NOTOSANS = 1, FONT_FAMILY_COUNT };
  static constexpr uint8_t LEGACY_OPENDYSLEXIC = 2;
  static constexpr uint8_t BUILTIN_FONT_COUNT = 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, FORCE_REFRESH = 3, FOOTNOTES = 4, SHORT_PWRBTN_COUNT };

  // Long-press Confirm action while reading an EPUB. The setting cycles through these values.
  // Persisted in settings.json by index: any new function (e.g. dictionary, bookmark) MUST use a
  // value >= 2 and be appended at the END of the enumValues array in SettingsList.h, otherwise the
  // stored indices shift and existing saves are silently misinterpreted.
  enum LONG_PRESS_MENU_FUNCTION {
    LP_MENU_KOSYNC = 0,
    LP_MENU_DISABLED = 1,
    LP_MENU_BOOKMARK = 2,
    LP_MENU_DICTIONARY = 3,
    LONG_PRESS_MENU_FUNCTION_COUNT
  };

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

  // Page turn button long press behavior
  enum LONG_PRESS_BUTTON_BEHAVIOR {
    OFF = 0,
    CHAPTER_SKIP = 1,
    ORIENTATION_CHANGE = 2,
    LONG_PRESS_BUTTON_BEHAVIOR_COUNT
  };

  // UI Theme
  enum UI_THEME { CLASSIC = 0, LYRA = 1, LYRA_3_COVERS = 2, ROUNDEDRAFF = 3 };

  // Image rendering in EPUB reader
  enum IMAGE_RENDERING { IMAGES_DISPLAY = 0, IMAGES_PLACEHOLDER = 1, IMAGES_SUPPRESS = 2, IMAGE_RENDERING_COUNT };

  enum TILT_PAGE_TURN { TILT_OFF = 0, TILT_NORMAL = 1, TILT_NVERTED = 2, TILT_PAGE_TURN_COUNT };

  enum TOUCH_READER_CONTROLS { TOUCH_READER_OFF = 0, TOUCH_READER_ON = 1, TOUCH_READER_CONTROLS_COUNT };

  enum QUICK_RESUME_SLEEP_SCREEN {
    QUICK_RESUME_NEVER = 0,
    QUICK_RESUME_AFTER_TIMEOUT = 1,
    QUICK_RESUME_SLEEP_SCREEN_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;
  // Status bar settings (statusBar retained for migration only)
  uint8_t statusBar = FULL;
  uint8_t statusBarChapterPageCount = 1;
  uint8_t statusBarBookProgressPercentage = 1;
  uint8_t statusBarProgressBar = HIDE_PROGRESS;
  uint8_t statusBarProgressBarThickness = PROGRESS_BAR_NORMAL;
  uint8_t statusBarTitle = CHAPTER_TITLE;
  uint8_t statusBarBattery = 1;
  uint8_t xtcStatusBarMode = XTC_STATUS_BAR_HIDE;
  // Clock display in status bar (X3 only, requires DS3231 RTC)
  uint8_t statusBarClock = STATUS_BAR_CLOCK_HIDE;
  // Clock UTC offset in quarter-hour steps, biased by 48 so it fits in uint8_t.
  // Value 48 = UTC+0, 0 = UTC-12:00, 104 = UTC+14:00.
  // Quarter-hour granularity supports oddball zones like Nepal (+5:45) and Chatham (+12:45).
  uint8_t clockUtcOffsetQ = 48;
  // Clock display format: 0 = 24-hour, 1 = 12-hour
  uint8_t clockFormat = 0;
  // Set once an NTP sync succeeds. Used to skip re-syncing on every WiFi connect.
  // Resetting to 0 (e.g. via the web UI) forces a re-sync on next WiFi connect.
  uint8_t clockHasBeenSynced = 0;
  // 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;
  uint8_t frontButtonFollowOrientation = 0;
  // 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 = NOTOSERIF;
  uint8_t fontSize = MEDIUM;
  uint8_t lineSpacing = NORMAL;
  uint8_t paragraphAlignment = JUSTIFIED;
  // Auto-sleep timeout setting (default 10 minutes). Legacy sleepTimeout enum values are migration-only.
  uint8_t sleepTimeoutMinutes = 10;
  // 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 download destination folder ("" = SD root). Global; edited from the
  // OPDS server list. Persisted via a category-less SettingInfo::String in
  // SettingsList.h, so it stays out of the on-device Settings screen.
  char opdsDownloadFolder[64] = "";
  // On-disk filename format for OPDS downloads (0=Author-Title default, 1=Title-Author,
  // 2=Title). See OpdsFilenameFormat. Persisted via a category-less SettingInfo::Enum,
  // edited from the OPDS server list; hidden from the on-device Settings screen.
  uint8_t opdsFilenameFormat = 0;
  // Hide battery percentage
  uint8_t hideBatteryPercentage = HIDE_NEVER;
  // Long-press page turn button behavior
  uint8_t longPressButtonBehavior = OFF;
  // Long-press Confirm function in EPUB reader (cycles through LONG_PRESS_MENU_FUNCTION values).
  // Defaults to Disabled so shortcut-based bookmark toggling remains opt-in.
  uint8_t longPressMenuFunction = LP_MENU_DISABLED;
  // UI Theme
  uint8_t uiTheme = LYRA;
  // Sunlight fading compensation
  uint8_t fadingFix = 0;
  // Power button return from footnotes (1 = enabled, 0 = disabled)
  uint8_t pwrBtnFootnoteBack = 1;
  // Use book's embedded CSS styles for EPUB rendering (1 = enabled, 0 = disabled)
  uint8_t embeddedStyle = 1;
  // Focus Reading - emphasizes the first part of words with bold
  uint8_t focusReadingEnabled = 0;
  // SD card font family name (empty = use built-in fontFamily)
  char sdFontFamilyName[32] = "";
  // Dictionary folder name under /dictionaries (empty = no dictionary)
  char dictionaryName[32] = "";
  // Show hidden files/directories (starting with '.') in the file browser (0 = hidden, 1 = show)
  uint8_t showHiddenFiles = 0;
  // Remove a book from the Recent Books list when its End-of-Book screen is reached (0 = off, 1 = on)
  uint8_t removeReadBooksFromRecents = 0;
  // Move epub to /Read/ folder on SD card when finished (0 = disabled, 1 = enabled)
  uint8_t moveFinishedToReadFolder = 0;
  // Short press Back goes to file browser instead of home (0 = disabled, 1 = enabled)
  uint8_t backShortToFileBrowser = 0;
  // Image rendering mode in EPUB reader
  uint8_t imageRendering = IMAGES_DISPLAY;
  // Tilt-based page turning (X3 only — requires QMI8658 IMU)
  uint8_t tiltPageTurn = TILT_OFF;
  // Touch screen reader zones/gestures on boards with a touch controller.
  uint8_t touchReaderControls = TOUCH_READER_ON;
  // Language setting (Language enum index, default 0 = EN)
  uint8_t language = 0;
  // Quick Resume: keep current content visible with moon icon instead of showing a static sleep screen.
  uint8_t quickResumeSleepScreen = QUICK_RESUME_NEVER;

  ~CrossPointSettings() = default;

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

  static constexpr uint8_t MIN_SLEEP_TIMEOUT_MINUTES = 1;
  static constexpr uint8_t SLEEP_TIMEOUT_NEVER_MINUTES = 31;
  static constexpr uint8_t MAX_SLEEP_TIMEOUT_MINUTES = SLEEP_TIMEOUT_NEVER_MINUTES;

  // Callback to resolve SD card font IDs. Set by SdCardFontSystem::begin().
  // Returns font ID or 0 if not found.
  using SdFontIdResolver = int (*)(void* ctx, const char* familyName, uint8_t fontSize);
  SdFontIdResolver sdFontIdResolver = nullptr;
  void* sdFontResolverCtx = nullptr;

  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(HalFile& file, bool count_only = false) const;

  bool saveToFile() const;
  bool loadFromFile();

  static void validateFrontButtonMapping(CrossPointSettings& settings);
  static uint8_t sleepTimeoutEnumToMinutes(uint8_t legacyValue);

 private:
  bool loadFromBinaryFile();
  bool migrateLanguageBinaryFile();

 public:
  float getReaderLineCompression() const;
  unsigned long getSleepTimeoutMs() const;
  int getRefreshFrequency() const;
};

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