#include <stdio.h>
#include <stdint.h>
#include <string.h>
#include <stm32l0xx_hal.h>

#define LED_PORT                GPIOB
#define LED_PIN                 GPIO_PIN_3
#define LED_PORT_CLK_ENABLE     __HAL_RCC_GPIOB_CLK_ENABLE

#define VCP_TX_Pin GPIO_PIN_2
#define VCP_RX_Pin GPIO_PIN_15

UART_HandleTypeDef huart2;

void SystemClock_Config(void);
static void MX_USART2_UART_Init(void);

void osSystickHandler(void)
{
  // 1 Hz blinking LED
  if ((HAL_GetTick() % 500) == 0)
  {
    HAL_GPIO_TogglePin(LED_PORT, LED_PIN);
  }
}

void initGPIO(void)
{
  GPIO_InitTypeDef GPIO_Config;

  // Initialize LED pin
  GPIO_Config.Mode = GPIO_MODE_OUTPUT_PP;
  GPIO_Config.Pull = GPIO_NOPULL;
  GPIO_Config.Speed = GPIO_SPEED_FREQ_HIGH;
  GPIO_Config.Pin = LED_PIN;
  LED_PORT_CLK_ENABLE();
  HAL_GPIO_Init(LED_PORT, &GPIO_Config);
}

int main(void)
{
  HAL_Init();
  SystemClock_Config();

  initGPIO();
  MX_USART2_UART_Init();

  printf("Hello  aaa, %s!\n", "flag is here");

 int totalDuration = 10;  // Total duration in seconds
  int delayBetweenToggles = 1000;
    int delayBetweenToggle = 2000;
  int totalTimePerIteration = 34 * delayBetweenToggles + 18 * delayBetweenToggle + (26 * 2000) + (50 * 1000);

int numIterations = (totalTimePerIteration * 1000) / totalTimePerIteration;

  for (int i = 0; i < numIterations; ++i)
  {


    printf("kekw");

    printf("Hello  aaa, %s!\n", "flag is here");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_SET);
    HAL_Delay(1000);
    printf("%s" , "-");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_RESET);
    HAL_Delay(delayBetweenToggles);
    printf("Hello  aaa, %s!\n", "flag is here");
    printf(" ");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_SET);
    HAL_Delay(1000);
printf(".");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_RESET);
    HAL_Delay(delayBetweenToggles);
printf(" ");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_SET);
    HAL_Delay(1000);
printf(".");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_RESET);
    HAL_Delay(delayBetweenToggle);
printf("-");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_SET);
    HAL_Delay(1000);
printf(".");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_RESET);
    HAL_Delay(delayBetweenToggles);
printf(" ");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_SET);
    HAL_Delay(1000);
printf(".");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_RESET);
    HAL_Delay(delayBetweenToggles);
printf(" ");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_SET);
    HAL_Delay(2000);
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_RESET);
    HAL_Delay(delayBetweenToggle);
printf("-");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_SET);
    HAL_Delay(1000);
printf(".");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_RESET);
    HAL_Delay(delayBetweenToggles);
printf(" ");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_SET);
    HAL_Delay(2000);
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_RESET);
    HAL_Delay(delayBetweenToggles);
printf(" ");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_SET);
    HAL_Delay(2000);
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_RESET);
    HAL_Delay(delayBetweenToggles);
printf(" ");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_SET);
    HAL_Delay(1000);
printf(".");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_RESET);
    HAL_Delay(delayBetweenToggle);
printf("-");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_SET);
    HAL_Delay(1000);
printf(".");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_RESET);
    HAL_Delay(delayBetweenToggles);
printf(" ");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_SET);
    HAL_Delay(2000);
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_RESET);
    HAL_Delay(delayBetweenToggles);
printf(" ");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_SET);
    HAL_Delay(2000);
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_RESET);
    HAL_Delay(delayBetweenToggles);
printf(" ");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_SET);
    HAL_Delay(1000);
printf(".");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_RESET);
    HAL_Delay(delayBetweenToggle);
printf("-");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_SET);
    HAL_Delay(1000);
printf(".");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_RESET);
    HAL_Delay(delayBetweenToggles);
printf(" ");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_SET);
    HAL_Delay(2000);
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_RESET);
    HAL_Delay(delayBetweenToggles);
printf(" ");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_SET);
    HAL_Delay(1000);
printf(".");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_RESET);
    HAL_Delay(delayBetweenToggle);
printf("-");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_SET);
    HAL_Delay(1000);
printf(".");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_RESET);
    HAL_Delay(delayBetweenToggles);
printf(" ");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_SET);
    HAL_Delay(2000);
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_RESET);
    HAL_Delay(delayBetweenToggle);
printf("-");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_SET);
    HAL_Delay(2000);
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_RESET);
    HAL_Delay(delayBetweenToggles);
printf(" ");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_SET);
    HAL_Delay(2000);
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_RESET);
    HAL_Delay(delayBetweenToggles);
printf(" ");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_SET);
    HAL_Delay(2000);
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_RESET);
    HAL_Delay(delayBetweenToggle);
printf("-"); 
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_SET);
    HAL_Delay(1000);
printf(".");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_RESET);
    HAL_Delay(delayBetweenToggles);
printf(" ");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_SET);
    HAL_Delay(2000);
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_RESET);
    HAL_Delay(delayBetweenToggles);
printf(" ");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_SET);
    HAL_Delay(1000);
printf(".");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_RESET);
    HAL_Delay(delayBetweenToggle);
printf("-");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_SET);
    HAL_Delay(1000);
printf(".");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_RESET);
    HAL_Delay(delayBetweenToggles);
printf(" ");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_SET);
    HAL_Delay(2000);
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_RESET);
    HAL_Delay(delayBetweenToggles);
printf(" ");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_SET);
    HAL_Delay(2000);
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_RESET);
    HAL_Delay(delayBetweenToggles);
printf(" ");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_SET);
    HAL_Delay(1000);
printf(".");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_RESET);
    HAL_Delay(delayBetweenToggle);
printf("-");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_SET);
    HAL_Delay(2000);
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_RESET);
    HAL_Delay(delayBetweenToggles);
printf(" ");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_SET);
    HAL_Delay(2000);
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_RESET);
    HAL_Delay(delayBetweenToggles);
printf(" ");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_SET);
    HAL_Delay(2000);
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_RESET);
    HAL_Delay(delayBetweenToggle);
printf("-"); 
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_SET);
    HAL_Delay(1000);
printf(".");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_RESET);
    HAL_Delay(delayBetweenToggles);
printf(" ");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_SET);
    HAL_Delay(2000);
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_RESET);
    HAL_Delay(delayBetweenToggles);
printf(" ");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_SET);
    HAL_Delay(1000);
printf(".");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_RESET);
    HAL_Delay(delayBetweenToggle);
printf("-");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_SET);
    HAL_Delay(1000);
printf(".");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_RESET);
    HAL_Delay(delayBetweenToggles);
printf(" ");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_SET);
    HAL_Delay(1000);
printf(".");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_RESET);
    HAL_Delay(delayBetweenToggles);
printf(" ");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_SET);
    HAL_Delay(1000);
printf(".");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_RESET);
    HAL_Delay(delayBetweenToggle);
printf("-");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_SET);
    HAL_Delay(2000);
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_RESET);
    HAL_Delay(delayBetweenToggles);
printf(" ");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_SET);
    HAL_Delay(1000);
printf(".");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_RESET);
    HAL_Delay(delayBetweenToggles);
printf(" ");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_SET);
    HAL_Delay(2000);
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_RESET);
    HAL_Delay(delayBetweenToggles);
printf(" ");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_SET);
    HAL_Delay(1000);
printf(".");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_RESET);
    HAL_Delay(delayBetweenToggle);
printf("-");   
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_SET);
    HAL_Delay(1000);
printf(".");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_RESET);
    HAL_Delay(delayBetweenToggles);
printf(" ");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_SET);
    HAL_Delay(1000);
printf(".");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_RESET);
    HAL_Delay(delayBetweenToggles);
printf(" ");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_SET);
    HAL_Delay(1000);
printf(".");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_RESET);
    HAL_Delay(delayBetweenToggles);
printf(" ");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_SET);
    HAL_Delay(1000);
printf(".");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_RESET);
    HAL_Delay(delayBetweenToggle);
printf("-");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_SET);
    HAL_Delay(1000);
printf(".");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_RESET);
    HAL_Delay(delayBetweenToggles);
printf(" ");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_SET);
    HAL_Delay(2000);
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_RESET);
    HAL_Delay(delayBetweenToggle);
printf("-");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_SET);
    HAL_Delay(1000);
printf(".");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_RESET);
    HAL_Delay(delayBetweenToggles);
printf(" ");
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_SET);
    HAL_Delay(2000);
    HAL_GPIO_WritePin(LED_PORT, LED_PIN, GPIO_PIN_RESET);
    HAL_Delay(3000);


  }
  while (1);

  return 0;
}

void SystemClock_Config(void)
{
  RCC_OscInitTypeDef RCC_OscInitStruct = {0};
  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
  RCC_PeriphCLKInitTypeDef PeriphClkInit = {0};

  __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);

  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
  RCC_OscInitStruct.HSIState = RCC_HSI_ON;
  RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
  RCC_OscInitStruct.PLL.PLLMUL = RCC_PLLMUL_4;
  RCC_OscInitStruct.PLL.PLLDIV = RCC_PLLDIV_2;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
  {
    Error_Handler();
  }

  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_SYSCLK
                                | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2;
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1) != HAL_OK)
  {
    Error_Handler();
  }
  
  PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USART2;
  PeriphClkInit.Usart2ClockSelection = RCC_USART2CLKSOURCE_PCLK1;
  if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK)
  {
    Error_Handler();
  }
}

static void MX_USART2_UART_Init(void)
{
  __HAL_RCC_GPIOA_CLK_ENABLE();
  
  GPIO_InitTypeDef GPIO_InitStruct = {0};
  GPIO_InitStruct.Pin = VCP_TX_Pin | VCP_RX_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
  GPIO_InitStruct.Alternate = GPIO_AF4_USART2;
  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

  huart2.Instance = USART2;
  huart2.Init.BaudRate = 115200;
  huart2.Init.WordLength = UART_WORDLENGTH_8B;
  huart2.Init.StopBits = UART_STOPBITS_1;
  huart2.Init.Parity = UART_PARITY_NONE;
  huart2.Init.Mode = UART_MODE_TX_RX;
  huart2.Init.HwFlowCtl = UART_HWCONTROL_NONE;
  huart2.Init.OverSampling = UART_OVERSAMPLING_16;
  huart2.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
  huart2.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
  if (HAL_UART_Init(&huart2) != HAL_OK)
  {
    Error_Handler();
  }

  __HAL_RCC_USART2_CLK_ENABLE();
}

void Error_Handler(void)
{
  while (1)
  {
    // An error occurred, stay in this loop
  }
}

#ifdef USE_FULL_ASSERT
void assert_failed(uint8_t *file, uint32_t line)
{
  // User can add their own implementation to report the file name and line number,
  // ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line)
}
#endif