#include "display.h"
#include "common/constants.h"
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "freertos/event_groups.h"
// TODO: implement actual display functionality

DisplayHandler::DisplayHandler(QueueHandle_t touch_queue, SemaphoreHandle_t lvgl_mutex) {
  (void)touch_queue;
  (void)lvgl_mutex;
}

DisplayHandler::~DisplayHandler() { }

EInkDisplayHandler::EInkDisplayHandler(QueueHandle_t touch_queue, SemaphoreHandle_t lvgl_mutex)
  : DisplayHandler(touch_queue, lvgl_mutex) { }

EInkDisplayHandler::~EInkDisplayHandler() { }

void EInkDisplayHandler::init(EventGroupHandle_t system_event_group) {
  if (system_event_group != NULL) {
    xEventGroupSetBits(system_event_group, DISPLAY_READY_BIT);
  }
}
void EInkDisplayHandler::start_event_loop() {
  // Minimal background task to represent display processing
  xTaskCreate(
    // use the static adapter and pass `this` as the task parameter
    EInkDisplayHandler::task_adapter,
    "display_task",
    2048,
    this,
    tskIDLE_PRIORITY + 1,
    nullptr
  );
}

// static
void EInkDisplayHandler::task_adapter(void* arg) {
  EInkDisplayHandler* self = static_cast<EInkDisplayHandler*>(arg);
  if (self) {
    self->run_event_loop();
  } else {
    printf("EInkDisplayHandler::task_adapter received null pointer\n");
  }
  // If run_event_loop ever returns, delete the task.
  vTaskDelete(NULL);
}

void EInkDisplayHandler::run_event_loop() {
  for (;;) {
    vTaskDelay(pdMS_TO_TICKS(1000));
  }
}

shutdown_display_handlerFunc EInkDisplayHandler::get_shutdown_display_handler() {
  return nullptr;
}

restart_display_handlerFunc EInkDisplayHandler::get_restart_display_handler() {
  return nullptr;
}