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

#define DHTPIN 4
#define DHTTYPE DHT22

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

unsigned long myChannelNumber = 3054427;
const char* myWriteAPIKey = "481INPB7N26ZKY0P";

String phoneNumber = "+967777888258";
String apiKey = "VEVP3EFQCEOHMEG5";

DHT dht(DHTPIN, DHTTYPE);
WiFiClient client;

// دالة ترميز URL
String urlEncode(String str) {
  String encodedString = "";
  for (unsigned int i = 0; i < str.length(); i++) {
    char c = str[i];
    if (isalnum(c) || c == '-' || c == '_' || c == '.' || c == '~') {
      encodedString += c;
    } else if (c == ' ') {
      encodedString += '+';
    } else {
      char hex[4];
      sprintf(hex, "%%%02X", (unsigned char)c);
      encodedString += hex;
    }
  }
  return encodedString;
}

// التحقق من اتصال الإنترنت
bool checkInternetConnection() {
  WiFiClient client;
  if (client.connect("www.google.com", 80)) {
    client.stop();
    return true;
  }
  return false;
}

void setup() {
  Serial.begin(115200);
  
  pinMode(DHTPIN, INPUT_PULLUP);
  dht.begin();
  delay(2000);
  
  connectToWiFi();
  ThingSpeak.begin(client);
}

void connectToWiFi() {
  Serial.print("Connecting to ");
  Serial.println(ssid);
  
  WiFi.begin(ssid, password);
  
  int attempts = 0;
  while (WiFi.status() != WL_CONNECTED && attempts < 30) {
    delay(500);
    Serial.print(".");
    attempts++;
  }
  
  if (WiFi.status() == WL_CONNECTED) {
    Serial.println("\n✅ WiFi Connected!");
    Serial.print("📡 IP Address: ");
    Serial.println(WiFi.localIP());
    
    // التحقق من الإنترنت
    if (checkInternetConnection()) {
      Serial.println("🌐 Internet access: OK");
    } else {
      Serial.println("❌ No internet access - Check wokwi.toml");
    }
  }
}

void sendWhatsAppMessage(String message) {
  if (WiFi.status() != WL_CONNECTED) {
    Serial.println("❌ No WiFi connection");
    return;
  }
  
  // التحقق من الإنترنت أولاً
  if (!checkInternetConnection()) {
    Serial.println("❌ No internet access - Cannot send message");
    return;
  }
  
  HTTPClient http;
  
  String encodedMessage = urlEncode(message);
  String url = "https://api.callmebot.com/whatsapp.php?phone=" + phoneNumber + 
               "&text=" + encodedMessage + 
               "&apikey=" + apiKey;
  
  Serial.println("📤 Sending WhatsApp message...");
  Serial.println("🔗 URL: " + url);
  
  http.begin(url);
  http.setTimeout(15000); // 15 ثانية timeout
  
  int httpCode = http.GET();
  
  if (httpCode > 0) {
    String response = http.getString();
    Serial.print("📨 HTTP Code: ");
    Serial.println(httpCode);
    Serial.print("📝 Response: ");
    Serial.println(response);
    
    if (httpCode == 200) {
      Serial.println("✅ WhatsApp message sent successfully!");
    }
  } else {
    Serial.print("❌ Connection failed: ");
    Serial.println(http.errorToString(httpCode).c_str());
    Serial.println("🔧 Possible solutions:");
    Serial.println("1. Check wokwi.toml file");
    Serial.println("2. Try HTTPS instead of HTTP");
    Serial.println("3. Check internet connection");
  }
  
  http.end();
}

void loop() {
  float h = dht.readHumidity();
  float t = dht.readTemperature();

  if (isnan(h) || isnan(t)) {
    Serial.println("❌ Sensor error");
    delay(5000);
    return;
  }

  // إرسال إلى ThingSpeak
  ThingSpeak.setField(1, t);
  ThingSpeak.setField(2, h);
  ThingSpeak.writeFields(myChannelNumber, myWriteAPIKey);

  // إرسال تنبيه WhatsApp
  if (t > 30.0) {
    String message = "Warning High Temperature: " + String(t, 1) + "C";
    sendWhatsAppMessage(message);
  }

  delay(20000);
}