#include "DHTesp.h"
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>

//Declare OLED display size
#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 64 // OLED display height, in pixels
// Declaration for an SSD1306 display connected to I2C (SDA, SCL pins)
#define OLED_RESET     -1 // Reset pin # (or -1 if sharing Arduino reset pin)

//Declare Temperature and Humidity counter
int THCounter = 0;

// Timer variables
unsigned long lastTime = 0;
unsigned long timerDelay = 2000;

float temperatureC;
float humidity;
int BatteryVoltage;

//Denfine DHT 22 input pins
const int DHT_PIN = 15;

//Initialize DHT Sensor
DHTesp dhtSensor;

Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);


//Check Temperature > 40 and Humidity < 40
void PrintTHCounter(){

    Serial.print("The current THCounter is  ");
    Serial.println(THCounter);
  
}

//Check Temperature > 40 and Humidity < 40
void CheckTempHum(){

  if(temperatureC >40 && humidity <40){
    
    THCounter++;
    Serial.print("Temp > 40 and Hum <40");    
    
  }
  
}

//Check THcounter is bigger than 3 then off relay and on alarm
void offRelayCheck(){

  if(THCounter>3){
    Serial.println("On LED");
    Serial.println("OFF Relay");
    Serial.println("Show Dry Clothes on OLED Display");
  }
  
}

//Reset THCounter
void resetTHCounter(){

  Serial.println("OFF LED");
  Serial.println("On Relay");
  THCounter =0;
  
}

//Read Battery Voltage
void readBATVolt(){
  
    //BatteryVoltage = analogRead(A0);
    Serial.print("BatteryVoltage:");
    Serial.println(BatteryVoltage);
    
}

//Read Temperature from AHT10 Senssor
void readAHT10Hum(){
  
    humidity = dhtSensor.getHumidity();
    Serial.print("Humidity (%): ");
    Serial.println(humidity);
    
}

//Read Temperature from AHT10 Senssor
void readAHT10Temp(){

     display.clearDisplay();
    display.setCursor(0,0);
    temperatureC = dhtSensor.getTemperature();
    Serial.print("Temperature (ºC): ");
    Serial.println(temperatureC);
    display.print(dhtSensor.getTemperature());
    
    display.display();
    
}

void setup() {
  Serial.begin(9600);

  dhtSensor.setup(DHT_PIN, DHTesp::DHT22);

  Serial.println("1. Temperature+1");
  Serial.println("2. Temperature+10");
  Serial.println("3. Temperature-10");
  Serial.println("4. Humidity+1");
  Serial.println("5. Humidity+10");
  Serial.println("6. Humidity-10");
  Serial.println("7. Reset TH Counter");
  Serial.println("8. Read Battery Volatge");

  // SSD1306_SWITCHCAPVCC = generate display voltage from 3.3V internally
  if(!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) { 
    Serial.println(F("SSD1306 allocation failed"));
    for(;;); // Don't proceed, loop forever
  }

  // Show initial display buffer contents on the screen --
  // the library initializes this with an Adafruit splash screen.
  display.display();
  delay(2000); // Pause for 2 seconds

  // Clear the buffer
  display.clearDisplay();

  display.setTextSize(2);             // Normal 1:1 pixel scale
  display.setTextColor(SSD1306_WHITE);        // Draw white text
  display.setCursor(0,0);             // Start at top-left corner
  display.println(F("Temp"));

  display.display();
  delay(2000);
  

}

void loop() {
  
  

  while (Serial.available() == 0) {
    //MAIN LOOP

    if ((millis() - lastTime) > timerDelay && THCounter<4) {
      
      readAHT10Temp();
      readAHT10Hum();
      readBATVolt();
      PrintTHCounter();

      CheckTempHum();

      lastTime = millis();
    }

    offRelayCheck();

    
  }

  int menuChoice = Serial.parseInt();

  switch (menuChoice) {
    case 1:
      // temp sensor code goes here
      temperatureC = temperatureC + 1;
      Serial.print("The NEW temperature is: ");
      Serial.println(temperatureC);
      break;

    case 2:
      // temp sensor code goes here
      temperatureC = temperatureC + 10;
      Serial.print("The NEW temperature is: ");
      Serial.println(temperatureC);
      break;
    
    case 3:
      // temp sensor code goes here
      temperatureC = temperatureC - 10;
      Serial.print("The NEW temperature is: ");
      Serial.println(temperatureC);
      break;

    case 4:
      // temp sensor code goes here
      humidity = humidity + 1;
      Serial.print("The NEW humidity is: ");
      Serial.println(humidity);
      break;

    case 5:
      // temp sensor code goes here
      humidity = humidity + 10;
      Serial.print("The NEW humidity  is: ");
      Serial.println(humidity);
      break;

    case 6:
      // temp sensor code goes here
      humidity = humidity - 10;
      Serial.print("The NEW humidity  is: ");
      Serial.println(humidity);
      break;

    case 7:
      // pressure sensor code goes here
      Serial.print("The THCounter reset to 0");
      resetTHCounter();
      break;

    case 8:
      // pressure sensor code goes here
      Serial.print("The battery volatge is: ");
      Serial.println(BatteryVoltage);
      break;

    default:
      Serial.println("Please choose a valid selection");
  }
  
}