Lumacs/include/lumacs/theme.hpp

#pragma once

#include <string>
#include <map>
#include <memory>
#include <vector>

namespace lumacs {

/// RGB Color representation
struct Color {
    int r, g, b;
    Color(int r = 0, int g = 0, int b = 0) : r(r), g(g), b(b) {}
    
    /// Convert to ncurses color index (will be assigned dynamically)
    int to_ncurses_color() const;
    
    /// Comparison operator for use in maps
    bool operator<(const Color& other) const;
};

/// Theme element types
enum class ThemeElement {
    // Text elements
    Normal,
    Keyword,
    String,
    Comment,
    Function,
    Type,
    Number,
    Constant,
    Error,
    
    // UI elements
    StatusLine,
    StatusLineInactive,
    MessageLine,
    LineNumber,
    Cursor,
    Selection,
    SearchMatch,
    SearchFail,
    
    // Window elements
    WindowBorder,
    WindowBorderActive,
    
    // Special
    Background
};

/// A theme defines colors and attributes for various UI elements
class Theme {
public:
    Theme(const std::string& name) : name_(name) {}
    
    /// Set color for a theme element
    void set_color(ThemeElement element, const Color& fg, const Color& bg = Color(-1, -1, -1));
    
    /// Get foreground color for an element
    Color get_fg_color(ThemeElement element) const;
    
    /// Get background color for an element
    Color get_bg_color(ThemeElement element) const;
    
    /// Get ncurses color pair for an element
    int get_color_pair(ThemeElement element) const;
    
    /// Theme name
    const std::string& name() const { return name_; }
    
    /// Initialize all color pairs for ncurses
    void initialize_ncurses_colors();
    
private:
    std::string name_;
    std::map<ThemeElement, std::pair<Color, Color>> colors_; // fg, bg
    mutable std::map<ThemeElement, int> color_pairs_;
    mutable int next_pair_id_ = 1;
};

/// Theme manager - handles multiple themes and switching between them
class ThemeManager {
public:
    /// Register a new theme
    void register_theme(std::shared_ptr<Theme> theme);
    
    /// Set the active theme
    void set_active_theme(const std::string& name);
    
    /// Get the active theme
    std::shared_ptr<Theme> active_theme() const { return active_theme_; }
    
    /// Get available theme names
    std::vector<std::string> theme_names() const;
    
    /// Create default themes
    void create_default_themes();
    
    /// Create Everforest dark theme
    std::shared_ptr<Theme> create_everforest_theme();
    
    /// Create default light theme
    std::shared_ptr<Theme> create_default_theme();
    
private:
    std::map<std::string, std::shared_ptr<Theme>> themes_;
    std::shared_ptr<Theme> active_theme_;
};

} // namespace lumacs