#pragma once
#include "lvgl.h"
#include "esp_lvgl_port.h"
#include "display/eink_display_handler.h"
#include "freertos/semphr.h"
#include "freertos/event_groups.h"
#include "esp_err.h"
#include <memory>


class LVGLHandler {
public:
  LVGLHandler(
    // an owning pointer to the display handler
    // The display handler must outlive the LVGLHandler
    // The display handler must be fully initialized before calling initLVGLDisplay
    std::unique_ptr<EInkDisplayHandler> display_handler_in
  );
  ~LVGLHandler();
  esp_err_t initLVGL(EventGroupHandle_t system_event_group = nullptr);

private:
  void rounder_cb_(lv_display_t* disp, lv_area_t* area);
  void flush_cb_(lv_display_t* disp, const lv_area_t* area, uint8_t* px_map);
  void touch_read_cb_(lv_indev_t* indev, lv_indev_data_t* data);
  esp_err_t initLVGLDisplay_();
  esp_err_t registerLVGLTouch_();
  esp_err_t initLVGLPort_();

  std::unique_ptr<EInkDisplayHandler> display_handler_ = nullptr;

  lv_display_t* lvgl_display_ = nullptr;
  lv_indev_t* lvgl_touch_indev_ = nullptr;
  lv_draw_buf_t* lvgl_draw_buf_ = nullptr;
  uint8_t* framebuffer_ = nullptr;
  bool framebuffer_in_psram_ = false;

  SemaphoreHandle_t lvgl_mutex_ = nullptr;
};