#include "stm32c0xx_hal.h"
#include <stdio.h>
#include <stdbool.h>

#define Green_buttom GPIO_PIN_0
#define Blue_buttom  GPIO_PIN_1
#define Red_buttom GPIO_PIN_4
#define Green_LED  GPIO_PIN_5
#define Blue_LED  GPIO_PIN_6
#define Red_LED  GPIO_PIN_7

void SystemClock_Config(void)
{
  // 目前先不做設定，後面會補
}

void MX_GPIO_Init(void)
{
  __HAL_RCC_GPIOA_CLK_ENABLE();
  GPIO_InitTypeDef GPIO_InitStruct = {0};

  // 初始化 LED 腳位
  GPIO_InitStruct.Pin = Green_LED | Blue_LED | Red_LED;
  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

  // 設定 Buttom
  GPIO_InitStruct.Pin = Green_buttom | Blue_buttom | Red_buttom;
  GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
  GPIO_InitStruct.Pull = GPIO_PULLUP;
  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
}

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

  bool KeepGreen = false;
  bool KeepBlue = false;
  bool KeepRed = false;

  while (1)
  {
    // 讀取按鈕狀態 (按下為低電位)
    if (HAL_GPIO_ReadPin(GPIOA, Green_buttom) == GPIO_PIN_RESET)
    {
      KeepGreen = !KeepGreen; // 切換綠色 LED 狀態 
      KeepBlue = false;
      KeepRed = false;
      HAL_Delay(200); // 簡單的消抖
    }
    if (HAL_GPIO_ReadPin(GPIOA, Blue_buttom) == GPIO_PIN_RESET)
    {
      KeepBlue = !KeepBlue;  // 切換藍色 LED 狀態
      HAL_Delay(200); // 簡單的消抖
      KeepGreen = false;
      KeepRed = false;
    }
    if (HAL_GPIO_ReadPin(GPIOA, Red_buttom) == GPIO_PIN_RESET)
    {
      KeepRed = !KeepRed;   // 切換紅色 LED 狀態
      HAL_Delay(200); // 簡單的消抖
      KeepGreen = false;
      KeepBlue = false;
    }
    
    // 根據 Keep 變數的狀態控制 LED
    HAL_GPIO_WritePin(GPIOA, Green_LED, KeepGreen ? GPIO_PIN_SET : GPIO_PIN_RESET);
    HAL_GPIO_WritePin(GPIOA, Blue_LED, KeepBlue ? GPIO_PIN_SET : GPIO_PIN_RESET);
    HAL_GPIO_WritePin(GPIOA, Red_LED, KeepRed ? GPIO_PIN_SET : GPIO_PIN_RESET);

    HAL_Delay(10); // 稍微延遲，避免過快的迴圈
  }
}