#pragma once
#include "DisplayAbstract.h"
#include "HardwareAbstract.hpp"
#include "Notification.hpp"
#include <Adafruit_FT6206.h>
#include <memory>
#include <TFT_eSPI.h>
#include "driver/ledc.h"

/*LEDC Channel to use for the LCD backlight*/
#define LCD_BACKLIGHT_LEDC_CHANNEL LEDC_CHANNEL_5

#define LCD_BACKLIGHT_LEDC_FREQUENCY 640

#define LCD_BACKLIGHT_LEDC_BIT_RESOLUTION 8

#define DEFAULT_BACKLIGHT_BRIGHTNESS 128


class Display: public DisplayAbstract
{
    public:
        static std::shared_ptr<Display> getInstance();
        
        /// @brief Set brightness setting and fade to it
        /// @param brightness 
        virtual void setBrightness(uint8_t brightness) override;
        virtual uint8_t getBrightness() override;
        virtual void turnOff() override;
    
        void onTouch(Notification<TS_Point>::HandlerTy aTouchHandler);

        inline void wake() {if(isAsleep) {isAsleep = false; startFade();}}
        inline void sleep() {if(!isAsleep){isAsleep = true; startFade();}}

    protected:
        virtual void flushDisplay(lv_disp_drv_t *disp, const lv_area_t *area, lv_color_t *color_p);
        virtual void screenInput(lv_indev_drv_t *indev_driver, lv_indev_data_t *data) override;
        
        /// @brief Fade toward brightness based on isAwake
        /// @return True - Fade complete
        ///         False - Fade set point not reached 
        bool fade();
        /// @brief Start the Fade task 
        void startFade();

        /// @brief Set the actual display brightness right now
        /// @param brightness 
        void setCurrentBrightness(uint8_t brightness);

    private:
        Display(int backlight_pin, int enable_pin);
        void setupTFT();
        void setupTouchScreen();
        void setupBacklight();
        
        int mEnablePin;
        int mBacklightPin;
        TFT_eSPI tft;

        Adafruit_FT6206 touch;
        TS_Point touchPoint;
        TS_Point oldPoint;
        Notification<TS_Point> mTouchEvent;

        TaskHandle_t mDisplayFadeTask = nullptr;
        SemaphoreHandle_t mFadeTaskMutex = nullptr;
        static void fadeImpl(void* aBrightness);

        uint8_t mBrightness = 0; // Current display brightness
        uint8_t mAwakeBrightness = 100; // Current setting for brightness when awake
        bool isAsleep = false;
};