#pragma once

#include "WidgetConfig.hpp"
#include "lvgl.h"
#include <array>

class WidgetManager {
public:
    static WidgetManager& instance();

    // Initialize (load config from NVS)
    void init();

    // Build/rebuild all widgets from current config
    // Call this after loading or when user clicks "Save" in web editor
    void applyConfig();

    // Get current config for web editor (JSON)
    void getConfigJson(char* buf, size_t bufSize) const;

    // Update config from web editor (JSON) - does NOT apply immediately
    bool updateConfigFromJson(const char* json);

    // Save current config to NVS and apply to display
    void saveAndApply();

    // Reset to factory defaults
    void resetToDefaults();

    // KNX value update (called from KnxWorker)
    void onKnxValue(uint16_t groupAddr, float value);
    void onKnxSwitch(uint16_t groupAddr, bool value);
    void onKnxText(uint16_t groupAddr, const char* text);

    // Direct config access
    ScreenConfig& getConfig() { return config_; }
    const ScreenConfig& getConfig() const { return config_; }

private:
    WidgetManager();
    ~WidgetManager() = default;
    WidgetManager(const WidgetManager&) = delete;
    WidgetManager& operator=(const WidgetManager&) = delete;

    void loadFromSdCard();
    void saveToSdCard();
    void destroyAllWidgets();
    void createAllWidgets();
    lv_obj_t* createWidget(const WidgetConfig& cfg);
    void applyStyle(lv_obj_t* obj, const WidgetConfig& cfg);
    const lv_font_t* getFontBySize(uint8_t sizeIndex);

    void createDefaultConfig();

    static constexpr const char* CONFIG_FILE = "/sdcard/lvgl.json";

    ScreenConfig config_;

    // Runtime widget references (indexed by widget ID)
    std::array<lv_obj_t*, MAX_WIDGETS> widgetObjects_;
    lv_obj_t* screen_ = nullptr;
};