#include <WiFi.h>
#include <PubSubClient.h>
#include <HTTPClient.h>
#include <ArduinoJson.h>

// WiFi credentials
const char* ssid = "Wokwi-GUEST";
const char* password = "";

// MQTT Broker settings
const char* mqtt_broker = "broker.hivemq.com";
const int mqtt_port = 1883;
const char* mqtt_topic = "pokemon/dataa";

WiFiClient espClient;
PubSubClient client(espClient);

// Function to connect to WiFi
void setup_wifi() {
  delay(10);
  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());
}

// Function to reconnect to MQTT broker
void reconnect() {
  while (!client.connected()) {
    Serial.print("Attempting MQTT connection...");
    String clientId = "ESP32Client-";
    clientId += String(random(0xffff), HEX);
    
    if (client.connect(clientId.c_str())) {
      Serial.println("connected");
      // Subscribe to our topic
      client.subscribe(mqtt_topic);
      Serial.println("Subscribed to topic: " + String(mqtt_topic));
    } else {
      Serial.print("failed, rc=");
      Serial.print(client.state());
      Serial.println(" trying again in 5 seconds");
      delay(5000);
    }
  }
}

void callback(char* topic, byte* payload, unsigned int length) {
  Serial.print("Message arrived [");
  Serial.print(topic);
  Serial.print("] ");
  for (int i = 0; i < length; i++) {
    Serial.print((char)payload[i]);
  }
  Serial.println();
}

// Function to get Pokemon data
void getPokemonData() {
  if (WiFi.status() == WL_CONNECTED) {
    HTTPClient http;
    String url = "https://pokeapi.co/api/v2/pokemon/ditto";  // Fixed URL for Ditto
    
    Serial.print("Getting data from: ");
    Serial.println(url);
    
    http.begin(url);
    int httpResponseCode = http.GET();
    
    Serial.print("HTTP Response code: ");
    Serial.println(httpResponseCode);
    
    if (httpResponseCode > 0) {
      String payload = http.getString();
      Serial.println("Received data length: " + String(payload.length()));
      
      // Create a JSON document
      DynamicJsonDocument doc(4096);  // Increased buffer size
      DeserializationError error = deserializeJson(doc, payload);
      
      if (error) {
        Serial.print("deserializeJson() failed: ");
        Serial.println(error.f_str());
        return;
      }
      
      // Create a smaller JSON object with selected data
      DynamicJsonDocument outputDoc(1024);
      outputDoc["name"] = doc["name"].as<const char*>();
      outputDoc["id"] = doc["id"].as<int>();
      outputDoc["height"] = doc["height"].as<int>();
      outputDoc["weight"] = doc["weight"].as<int>();
      
      // Convert to string
      String outputJson;
      serializeJson(outputDoc, outputJson);
      
      // Publish to MQTT
      bool published = client.publish(mqtt_topic, outputJson.c_str());
      Serial.print("Published Pokemon data: ");
      Serial.println(outputJson);
      Serial.print("Publish success: ");
      Serial.println(published ? "Yes" : "No");
    }
    
    http.end();
  } else {
    Serial.println("WiFi not connected!");
  }
}

void setup() {
  Serial.begin(115200);
  while(!Serial) { delay(100); }
  
  Serial.println("\nStarting Pokemon MQTT Client");
  setup_wifi();
  
  client.setServer(mqtt_broker, mqtt_port);
  client.setCallback(callback);
  
  Serial.println("Setup complete");
}

void loop() {
  if (!client.connected()) {
    reconnect();
  }
  client.loop();
  
  // Get Ditto data every 10 seconds
  static unsigned long lastTime = 0;
  if (millis() - lastTime > 10000) {
    Serial.println("\nFetching Ditto data...");
    getPokemonData();
    lastTime = millis();
  }
}