#include <WiFi.h>
#include <DHT.h>
#include <ESP32Servo.h>
#include "ThingSpeak.h"
#include <UrlEncode.h>
#include <HTTPClient.h>

float hum=10;
float temp=10;
float lim;

// Define phone number and API key for the WhatsApp messaging service
String phoneNumber = "212705489106";
String apiKey = "2336824";

// Function to send a WhatsApp message
void sendMessage(String message){
  // Construct the URL for the CallMeBot WhatsApp API with phone number, API key, and encoded message
  String url = "https://api.callmebot.com/whatsapp.php?phone=" + phoneNumber + "&apikey=" + apiKey + "&text=" + urlEncode(message);

  // Create an HTTPClient object
  HTTPClient http;

  // Initialize the HTTPClient with the constructed URL
  http.begin(url);

  // Send a GET request and get the HTTP response code
  int httpResponseCode = http.GET();

  // Check if the message was sent successfully
  if (httpResponseCode == 200) {
    Serial.println("Message sent successfully");
  } else {
    Serial.println("Error sending the message");
    Serial.print("HTTP response code: ");
    Serial.println(httpResponseCode);
  }

  // Close the HTTP connection
  http.end();
}

// Thingspeak details
const char* WIFI_NAME = "Wokwi-GUEST";
const char* WIFI_PASS = "";
const int myChannelNumber = 2547816;
const char* write_API_Key = "JPQN2MZMRXZ2SH80";
const char* server = "api.thingspeak.com";
WiFiClient client;

// DHT details
#define DHTTYPE DHT22
int DHTPIN = 4;
DHT dht(DHTPIN, DHTTYPE);

// Servo details
Servo servo;
int SERVO_PIN = 17;

// Potentiometer details
int POTENTIOMETER_PIN = 35;

// LED pins
int Red = 25;
int Green = 33;
int Blue = 32;

// Luminosity
int LDRPIN = 34;
int led1 = 22;
int led2 = 21;
int led3 = 19;
int led4 = 5;

// CO2 and temperature thresholds
float co2Threshold = 350;
float temperatureThreshold = 30;

void setup() {
  Serial.begin(115200);
  pinMode(LDRPIN, INPUT);
  pinMode(POTENTIOMETER_PIN, INPUT);

  pinMode(Red, OUTPUT);
  pinMode(Green, OUTPUT);
  pinMode(Blue, OUTPUT);

  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
  pinMode(led3, OUTPUT);
  pinMode(led4, OUTPUT);

  servo.attach(SERVO_PIN);
  servo.write(90);

  WiFi.begin(WIFI_NAME, WIFI_PASS);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Wifi not connected");
  }
  Serial.println("Wifi connected!");
  Serial.println("Local IP: " + String(WiFi.localIP()));
  WiFi.mode(WIFI_STA);
  ThingSpeak.begin(client);

  // Initialize DHT sensor
  dht.begin();

  // Read temperature and humidity data from the sensor
  float temperature = dht.readTemperature();
  if (isnan(temperature)) {
    Serial.println("Failed to read from DHT sensor!");
    return;
  }

  // Send a WhatsApp message with the temperature information
  sendMessage("Temp: " + String(temperature, 2) + "C");
}

void loop() {
  
   // Scenario 1: CO2 élevé
  int potentiometerValue = analogRead(POTENTIOMETER_PIN);
  co2Threshold = map(potentiometerValue, 0, 4095, 0, 1000);
  Serial.print("Valeur de CO2 : ");
   Serial.println(potentiometerValue);
  float co2Level = analogRead(35);
  if (co2Level > co2Threshold) {
    servo.write(180); 
  }else{
    servo.write(90);
  }
  
  // Scenario 2: Température
  float temperature = dht.readTemperature();
  Serial.print("Temperature: ");
  Serial.println(temperature);
  if (temperature > temperatureThreshold) {
    digitalWrite(Red, LOW);
    digitalWrite(Green, LOW);
    digitalWrite(Blue, HIGH);
  } else {
    digitalWrite(Red, HIGH);
    digitalWrite(Green, LOW);
    digitalWrite(Blue, LOW);
  }

  // Scenario 3: Luminosité
  int lightLevel = analogRead(LDRPIN);
  Serial.print("Luminosité: ");
  Serial.println(lightLevel);
  if (lightLevel < 1000) {
    digitalWrite(led1, HIGH);
    digitalWrite(led2, LOW);
    digitalWrite(led3, LOW);
    digitalWrite(led4, LOW);
  } else if (lightLevel < 2500) {
    digitalWrite(led1, HIGH);
    digitalWrite(led2, HIGH);
    digitalWrite(led3, LOW);
    digitalWrite(led4, LOW);
  } else if (lightLevel < 4000) {
    digitalWrite(led1, HIGH);
    digitalWrite(led2, HIGH);
    digitalWrite(led3, HIGH);
    digitalWrite(led4, LOW);
  } else {
    digitalWrite(led1, HIGH);
    digitalWrite(led2, HIGH);
    digitalWrite(led3, HIGH);
    digitalWrite(led4, HIGH);
  }

  delay(100);

  sendDataToThingSpeak();
}

void sendDataToThingSpeak() {
  hum = dht.readHumidity();
  temp = dht.readTemperature();
  
  ThingSpeak.setField(1, temp);
  delay(500);
  ThingSpeak.setField(2, hum);

  int writeResult = ThingSpeak.writeFields(myChannelNumber, write_API_Key);

  Serial.println("Temp: " + String(temp, 2) + "°C");
  Serial.println("Humidity: " + String(hum, 1) + "%");

  if (writeResult == 200) {
    Serial.println("Data pushed successfully");
  } else {
    Serial.println("Push error: " + String(writeResult));
  }
  Serial.println("---");
}