#include <WiFi.h>

#define LED_PIN     2
#define BUTTON_PIN  13
#define BUZZER_PIN  12

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

int interactionCount = 0;

void connectWiFi() {
  Serial.println("Connecting to WiFi...");
  WiFi.begin(ssid, password);

  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  Serial.println("\nWiFi Connected!");
  Serial.print("IP Address: ");
  Serial.println(WiFi.localIP());
}

void aiGreeting() {
  Serial.println("\n==============================");
  Serial.println("   ESP32 INTERNET AI ASSISTANT");
  Serial.println("==============================");
  Serial.println("AI: Hello Sumedh 👋");
  Serial.println("AI: System Ready.");
}

void aiSystemStatus() {
  Serial.println("\nAI: Checking system status...");
  Serial.print("WiFi Status: ");
  Serial.println(WiFi.status() == WL_CONNECTED ? "Connected" : "Disconnected");
  Serial.print("Free Heap Memory: ");
  Serial.println(ESP.getFreeHeap());
}

void aiInternetKnowledge() {
  Serial.println("\nAI: Accessing Internet Knowledge...");

  WiFiClient client;

  if (client.connect("httpbin.org", 80)) {

    client.println("GET /uuid HTTP/1.1");
    client.println("Host: httpbin.org");
    client.println("Connection: close");
    client.println();

    while (client.connected() || client.available()) {
      if (client.available()) {
        String line = client.readStringUntil('\n');
        if (line.indexOf("uuid") >= 0) {
          Serial.print("AI Unique ID: ");
          Serial.println(line);
        }
      }
    }

    client.stop();
  } else {
    Serial.println("AI: Internet connection failed.");
  }
}

void aiSmartReply() {
  Serial.println("\nAI: Thinking...");
  delay(1000);

  switch (interactionCount % 3) {
    case 0:
      Serial.println("AI: Intelligence is the ability to adapt to change.");
      break;
    case 1:
      Serial.println("AI: The future belongs to embedded AI systems.");
      break;
    case 2:
      Serial.println("AI: You are building something powerful 🚀");
      break;
  }
}

void setup() {
  Serial.begin(115200);

  pinMode(LED_PIN, OUTPUT);
  pinMode(BUTTON_PIN, INPUT_PULLUP);
  pinMode(BUZZER_PIN, OUTPUT);

  connectWiFi();
  aiGreeting();
}

void loop() {

  if (digitalRead(BUTTON_PIN) == LOW) {

    interactionCount++;

    digitalWrite(LED_PIN, HIGH);
    digitalWrite(BUZZER_PIN, HIGH);
    delay(200);
    digitalWrite(BUZZER_PIN, LOW);

    Serial.println("\n--------------------------------");
    Serial.print("User Interaction #");
    Serial.println(interactionCount);

    aiSmartReply();
    aiSystemStatus();
    aiInternetKnowledge();

    Serial.println("--------------------------------\n");

    digitalWrite(LED_PIN, LOW);

    delay(5000);
  }
}