/* 
 *  Deva DIY LED Running Light
*/
 
//กำหนดขา Pins ESP32
const int touch_SW = 15;
const int led_pins17 = 17;
const int led_pins18 = 18;
const int led_pins19 = 19;
const int led_pins21 = 21;

//ตัวแปรเก็บค่าสถานะ H||L หลอด LED
bool state_led17 = 0;
bool state_led18 = 0;
bool state_led19 = 0;
bool state_led21 = 0; 

//ตัวแปรสำหรับเก็บค่า Touch 
int touch_Value;

//ตัวแปรเก็บค่า MODE LED Runging
int Mode_led = 0;

void setup() {
  Serial.begin(115200);
  
  pinMode(touch_SW,INPUT);
  pinMode(led_pins17,OUTPUT);
  pinMode(led_pins18,OUTPUT);
  pinMode(led_pins19,OUTPUT);
  pinMode(led_pins21,OUTPUT);
  
  digitalWrite(led_pins17,0);
  digitalWrite(led_pins18,0);
  digitalWrite(led_pins19,0);
  digitalWrite(led_pins21,0);
}

void loop() {
  
  // อ่านสถานะของค่า Touch pins:
  touch_Value = touchRead(touch_SW);

  // ถ้ากดสวิตช์สัมผัสค่า touch_Value < 20 และค้างไว้ 1 วินาที จะเปลี่ยน mode ไฟวิ่ง
  static bool touch_change = false;
  static bool touch_state = false;
  static bool hold_state = false;
  const long debounceDelay = 1000;
  static unsigned long lastDebounceTime;

  if(touch_Value < 20){    
      if (touch_change == false) {
        touch_change = true;
        lastDebounceTime = millis();
      }
      else if ((millis() - lastDebounceTime >= debounceDelay) && (!hold_state)) {
        touch_state = true;
        hold_state = true;
        //Serial.print("touch_state = ");
        //Serial.println(touch_state);
      }
      else {
        touch_state = false;
      } 
    }
    else if (touch_Value > 20) {
      touch_change = false;
      hold_state = false;
      touch_state = false;
    }

  if(touch_state){
    Mode_led++;
    Serial.print(" Mode LED = ");  
    Serial.println(Mode_led);  
    }

  // Mode ไฟวิ่ง LED 
  switch (Mode_led)
    {
    static unsigned long DelayTime2 = 0;
    static unsigned long DelayTime3 = 0;  
     
    case 1: // LED สว่างทุกหลอด
    
      state_led17 = 1; state_led18 = 1; state_led19 = 1; state_led21 = 1;
      
    break;
    case 2: // LED กระพริบทุกๆ 300ms.
    
      if(millis() >= DelayTime2){
        state_led17 = !state_led17; state_led18 = !state_led18; state_led19 = !state_led19; state_led21 = !state_led21;
        DelayTime2 = millis() + 300L;
      }
      
    break;
    case 3: // LED ไฟวิ่งซ้ายไปขวาและขวาไปซ้าย ความเร็ว 150ms.
    
        static int i=1;
        static bool LtoR = false;
          //ไฟวิ่งจากขวาไปซ้าย
          if(millis() >= DelayTime3 && (!LtoR)){
            if(i == 1){
              state_led17 = 0; state_led18 = 0; state_led19 = 0; state_led21 = 1;
              i++;
              DelayTime3 = millis() + 150L;
            }
            else if(i == 2){
              state_led17 = 0; state_led18 = 0; state_led19 = 1; state_led21 = 0;
              i++;
              DelayTime3 = millis() + 150L;
            }
            else if(i == 3){
              state_led17 = 0; state_led18 = 1; state_led19 = 0; state_led21 = 0;
              i++;
              DelayTime3 = millis() + 150L;
            }
            else if(i == 4){
              state_led17 = 1; state_led18 = 0; state_led19 = 0; state_led21 = 0;
              LtoR = true;
              DelayTime3 = millis() + 150L;
            }
          }

        //ไฟวิ่งจากซ้ายไปขวา
          if(millis() >= DelayTime3 && LtoR){
            if(i == 1){
              state_led17 = 0; state_led18 = 0; state_led19 = 0; state_led21 = 1;
              LtoR = false;
              DelayTime3 = millis() + 150L;
            }
            else if(i == 2){
              state_led17 = 0; state_led18 = 0; state_led19 = 1; state_led21 = 0;
              i--;
              DelayTime3 = millis() + 150L;
            }
            else if(i == 3){
              state_led17 = 0; state_led18 = 1; state_led19 = 0; state_led21 = 0;
              i--;
              DelayTime3 = millis() + 150L;
            }
            else if(i == 4){
              state_led17 = 1; state_led18 = 0; state_led19 = 0; state_led21 = 0;
              i--;
              DelayTime3 = millis() + 150L;
            }
          }
        
      
    break;
    default:
    
      Mode_led = 0;
      state_led17 = 0;
      state_led18 = 0;
      state_led19 = 0;
      state_led21 = 0; 

    break;
    }
    
  //Output แสดงผล ไฟ LED
  digitalWrite(led_pins17,state_led17);
  digitalWrite(led_pins18,state_led18);
  digitalWrite(led_pins19,state_led19);
  digitalWrite(led_pins21,state_led21);
}