#pragma once

#include <cstddef>
#include <cstdint>
#include <functional>
#include <vector>

class GfxRenderer;
struct RecentBook;

struct Rect {
  int x;
  int y;
  int width;
  int height;

  explicit Rect(int x = 0, int y = 0, int width = 0, int height = 0) : x(x), y(y), width(width), height(height) {}
};

struct TabInfo {
  const char* label;
  bool selected;
};

struct ThemeMetrics {
  int batteryWidth;
  int batteryHeight;

  int topPadding;
  int batteryBarHeight;
  int headerHeight;
  int verticalSpacing;

  int contentSidePadding;
  int listRowHeight;
  int listWithSubtitleRowHeight;
  int menuRowHeight;
  int menuSpacing;

  int tabSpacing;
  int tabBarHeight;

  int scrollBarWidth;
  int scrollBarRightOffset;

  int homeTopPadding;
  int homeCoverHeight;
  int homeCoverTileHeight;
  int homeRecentBooksCount;

  int buttonHintsHeight;
  int sideButtonHintsWidth;

  int progressBarHeight;
  int bookProgressBarHeight;

  int keyboardKeyWidth;
  int keyboardKeyHeight;
  int keyboardKeySpacing;
  bool keyboardBottomAligned;
  bool keyboardCenteredText;
};

// Default theme implementation (Classic Theme)
// Additional themes can inherit from this and override methods as needed

namespace BaseMetrics {
constexpr ThemeMetrics values = {.batteryWidth = 15,
                                 .batteryHeight = 12,
                                 .topPadding = 5,
                                 .batteryBarHeight = 20,
                                 .headerHeight = 45,
                                 .verticalSpacing = 10,
                                 .contentSidePadding = 20,
                                 .listRowHeight = 30,
                                 .listWithSubtitleRowHeight = 65,
                                 .menuRowHeight = 45,
                                 .menuSpacing = 8,
                                 .tabSpacing = 10,
                                 .tabBarHeight = 50,
                                 .scrollBarWidth = 4,
                                 .scrollBarRightOffset = 5,
                                 .homeTopPadding = 20,
                                 .homeCoverHeight = 400,
                                 .homeCoverTileHeight = 400,
                                 .homeRecentBooksCount = 1,
                                 .buttonHintsHeight = 40,
                                 .sideButtonHintsWidth = 30,
                                 .progressBarHeight = 16,
                                 .bookProgressBarHeight = 4,
                                 .keyboardKeyWidth = 18,
                                 .keyboardKeyHeight = 18,
                                 .keyboardKeySpacing = 3,
                                 .keyboardBottomAligned = false,
                                 .keyboardCenteredText = false};
}

class BaseTheme {
 public:
  virtual ~BaseTheme() = default;

  // Component drawing methods
  virtual void drawProgressBar(const GfxRenderer& renderer, Rect rect, size_t current, size_t total) const;
  virtual void drawBatteryLeft(const GfxRenderer& renderer, Rect rect,
                               bool showPercentage = true) const;  // Left aligned (reader mode)
  virtual void drawBatteryRight(const GfxRenderer& renderer, Rect rect,
                                bool showPercentage = true) const;  // Right aligned (UI headers)
  virtual void drawButtonHints(GfxRenderer& renderer, const char* btn1, const char* btn2, const char* btn3,
                               const char* btn4) const;
  virtual void drawSideButtonHints(const GfxRenderer& renderer, const char* topBtn, const char* bottomBtn) const;
  virtual void drawList(const GfxRenderer& renderer, Rect rect, int itemCount, int selectedIndex,
                        const std::function<std::string(int index)>& rowTitle,
                        const std::function<std::string(int index)>& rowSubtitle = nullptr,
                        const std::function<std::string(int index)>& rowIcon = nullptr,
                        const std::function<std::string(int index)>& rowValue = nullptr,
                        bool highlightValue = false) const;
  virtual void drawHeader(const GfxRenderer& renderer, Rect rect, const char* title,
                          const char* subtitle = nullptr) const;
  virtual void drawSubHeader(const GfxRenderer& renderer, Rect rect, const char* label,
                             const char* rightLabel = nullptr) const;
  virtual void drawTabBar(const GfxRenderer& renderer, Rect rect, const std::vector<TabInfo>& tabs,
                          bool selected) const;
  virtual void drawRecentBookCover(GfxRenderer& renderer, Rect rect, const std::vector<RecentBook>& recentBooks,
                                   const int selectorIndex, bool& coverRendered, bool& coverBufferStored,
                                   bool& bufferRestored, std::function<bool()> storeCoverBuffer) const;
  virtual void drawButtonMenu(GfxRenderer& renderer, Rect rect, int buttonCount, int selectedIndex,
                              const std::function<std::string(int index)>& buttonLabel,
                              const std::function<std::string(int index)>& rowIcon) const;
  virtual Rect drawPopup(const GfxRenderer& renderer, const char* message) const;
  virtual void fillPopupProgress(const GfxRenderer& renderer, const Rect& layout, const int progress) const;
  virtual void drawReadingProgressBar(const GfxRenderer& renderer, const size_t bookProgress) const;
  virtual void drawHelpText(const GfxRenderer& renderer, Rect rect, const char* label) const;
  virtual void drawTextField(const GfxRenderer& renderer, Rect rect, const int textWidth) const;
  virtual void drawKeyboardKey(const GfxRenderer& renderer, Rect rect, const char* label, const bool isSelected) const;
};