#include <WiFi.h>
#include <HTTPClient.h>
#include <DHT.h>
#include <SPI.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>

const char* ssid = "Wokwi-GUEST";
const char* password = "";
const char* token = "C06pt60lo220Wa6MY3UZB1HcbgpJBSdn2s21Ma0kUqT";


#define DHTPIN 13      // Pin connected to DHT22
#define DHTTYPE DHT22 // DHT sensor type
#define LEDPIN1 18
#define LEDPIN2 16
#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64


Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);


DHT dht(DHTPIN, DHTTYPE);

void setup() {
  Serial.begin(115200);
  dht.begin();
  WiFi.begin("Wokwi-GUEST", "", 6);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting to WiFi...");
  }
  
  pinMode(18, OUTPUT);
  pinMode(16, OUTPUT);
  Serial.println("Hello ESP32");
  Serial.println(" READY ");
  
  if (!display.begin(SSD1306_SWITCHCAPVCC, 0x3c))
  {
    Serial.println(F("SSD1306 initialization failed"));
    while(true);
  }
}

void loop() {
  if (WiFi.status() == WL_CONNECTED) {
    HTTPClient http;

    http.begin("https://notify-api.line.me/api/notify");
    http.addHeader("Authorization", "Bearer " + String(token));
    http.addHeader("Content-Type", "application/x-www-form-urlencoded");

    float humidity = dht.readHumidity();
    float temperature = dht.readTemperature();

    if (isnan(humidity) || isnan(temperature)) {
      Serial.println("Failed to read from DHT sensor!");
    } else {
      Serial.print("Humidity: ");
      Serial.print(humidity);
      Serial.print(" %\t");
      Serial.print("Temperature: ");
      Serial.print(temperature);
      Serial.println(" °C");

      if (temperature > 25) {
        http.POST("message=อุณหภูมิสูงเกิน 25 องศา-mr.Navarat 🌡");
        Serial.println("High temperature message sent");
        digitalWrite(18, HIGH);
        
        display.begin(SSD1306_SWITCHCAPVCC, 0x3c);
        display.clearDisplay();
        display.setTextColor(WHITE);
        display.setCursor(0, 25);
        display.setTextSize(1);
        display.print("High Temp: ");
        display.print(temperature);
        display.print(" *c ");
        display.display();
      }

      if (humidity < 40) {
        http.POST("message=ความชื้นสัมพัทธ์สูงเกิน 40 องศา-Mr.Navarat 🌡");
        Serial.println("Low humidity message sent");
        Serial.println("==================================");
        digitalWrite(16, HIGH);
         
        display.begin(SSD1306_SWITCHCAPVCC, 0x3c);
        display.clearDisplay();
        display.setTextColor(WHITE);
        display.setCursor(0, 25);
        display.setTextSize(1);
        display.print("High humi: ");
        display.print(humidity);
        display.print(" % ");
        display.display();
      }
      if(temperature <25)
      {digitalWrite(18, LOW);}

      if(humidity < 40)
      {digitalWrite(16, LOW);}

    }

    int httpCode = http.POST("READY");  // Use an empty POST request to send only headers

    if (httpCode > 0) {
      String response = http.getString();
      //Serial.print("HTTP Response code: ");
      //Serial.println(httpCode);
      //Serial.print("Server response: ");
     // Serial.println(response);
    } else {
      Serial.println(".....");
    }

    http.end();

    delay(3000); // Send a message and read sensor data every 5 seconds
  }
}