#include <WiFi.h>
#include <HTTPClient.h>
#include <DHT.h>

/***************sensor*****************/
#define DHTTYPE DHT22
#define DHT_Pin 26
#define LUX_Pin A6
DHT DHT_sensor(DHT_Pin,DHTTYPE);
float humi;
float temp;
int light;
float lux;
/***************sensor*****************/

/***************manual*****************/
int switchPin[] = {13,12,14};
int relayPin[] = {4,2,15};
int ledMode = 27;
int status[] = {0,0,0};
/***************manual*****************/

/*************send data*****************/
const char* ssid = "Wokwi-GUEST";
const char* password = "";
String s = " ";
String urlFinal;
String GOOGLE_SCRIPT_URL = "https://docs.google.com/spreadsheets/d/1LNFUZKIzufrMJzmf3pLZ4EyNO7DtNzkLViutRFlL3po/edit";
int statusWeb[] = {0,0,0};
int statusMode;
int httpCode;
/*************send data*****************/

/*************send time*****************/
unsigned long  currentime = 0;
unsigned long  starttime = 0;
unsigned long  durationtime = 1000;
int timeSend = 0;
int Sec = 5;
/*************send time*****************/

void setup(){
  Serial.begin(115200);
/***************manual*****************/
 for(int i=0; i<3; i++){
    pinMode(switchPin[i], INPUT_PULLUP);
    pinMode(relayPin[i], OUTPUT);
 }
/***************manual*****************/

/***************sensor*****************/
 DHT_sensor.begin();
 pinMode(LUX_Pin, INPUT);
/***************sensor*****************/

/************wifi connected*************/  
  WiFi.begin(ssid, password, 6);
  Serial.print("Connecting to WiFi");
  while (WiFi.status() != WL_CONNECTED) {
    delay(100);
    Serial.print(".");
  }
  Serial.print("OK! IP=");
  Serial.println(WiFi.localIP());  
/************wifi connected*************/

}

void loop(){
  countTime(); 
  digitalWrite(ledMode, statusMode);

/***************sensor*****************/
  humi = DHT_sensor.readHumidity();
  temp = DHT_sensor.readTemperature();
  light = analogRead(LUX_Pin);
  float voltage = light / 4096. * 3.3;
  float resistance = 2000 * voltage / (1 - voltage / 3.3);
  lux = pow(33 * 1e3 * pow(10, 0.7) / resistance, (1 / 0.7));
/***************sensor*****************/  

/*************send time****************/  
  if(timeSend == Sec){
    sendData(urlFinal);
    while(httpCode < 0){
      sendData(urlFinal);
    }
  }
/*************send time****************/

/************control Mode**************/
 void controlTime();
 if(statusMode == 1){ // Mode Auto
    controlSensor();
 }else{ // Mode Manual
    controlSwitch();
    statusMode = 0;
 }
/************control Mode**************/

}

void controlSensor(){  
  if(temp > 30.0){
    digitalWrite(relayPin[0], HIGH);
  }else{
    digitalWrite(relayPin[0], LOW);
  }
  if(lux < 100){
    digitalWrite(relayPin[1], HIGH);
  }else{
    digitalWrite(relayPin[1], LOW);
  }

}

void controlSwitch(){
  for(int i=0; i<3; i++){
    if(digitalRead(switchPin[i]) == 0){
     status[i] = !status[i];
     statusWeb[i] = status[i];
     delay(20);
    }
  }
  digitalWrite(relayPin[0], statusWeb[0]);
  digitalWrite(relayPin[1], statusWeb[1]);
  digitalWrite(relayPin[2], statusWeb[2]);
}

void sendData(String URL){
 urlFinal= GOOGLE_SCRIPT_URL+"?FIELD1="+temp +"&FIELD2="+humi +"&FIELD3="+lux;
  Serial.print("Post data to spreadsheet!");
  Serial.println(URL);
  HTTPClient http;
  http.begin(URL.c_str());
  http.setFollowRedirects(HTTPC_STRICT_FOLLOW_REDIRECTS);
  int httpcode = http.GET();
  Serial.print("HTTP status Code: ");
  Serial.println(httpcode);
  String payload;
  if (httpcode > 0){
    payload = http.getString();
    Serial.println("Payload : "+ payload);
    s = payload;
  }
  http.end();
  webControl();
}

void webControl(){
  String R1 = s.substring(0, 1);
  String R2 = s.substring(2, 3);
  String R3 = s.substring(4, 5);
  String R4 = s.substring(6, 7);
  
  statusWeb[0] = R1.toInt();
  statusWeb[1] = R2.toInt();  
  statusWeb[2] = R3.toInt();
  statusMode = R4.toInt();
}

void countTime(){
  currentime = millis();
 if (currentime - starttime >= durationtime){
      starttime = currentime; 
      if(timeSend < Sec){                                                      
         timeSend = timeSend+1;
      }else{
         timeSend = 0;
      }   
      Serial.println(timeSend);
  }   
}