#include "WiFiClientSecure.h"
#include <PubSubClient.h>

// Replace the next variables with your SSID/Password combination
const char* ssid = "Wokwi-GUEST";
const char* password = "";

// Add your MQTT Broker IP address, example:
//const char* mqtt_server = "192.168.1.144";
const char* mqtt_server = "brunomarelli.duckdns.org";
const int mqtt_port     = 8883;     //Port to your Mosquitto broker server. Dont forget to forward it in your router for remote access
const char* mqtt_user   = "bruno";  //Depends on Mosquitto configuration, if it is not set, you do not need it
const char* mqtt_pass   = "";       //Depends on Mosquitto configuration, if it is not set, you do not need it

const char* CA_cert = \
  "-----BEGIN CERTIFICATE-----\n" \
  "MIIFazCCA1OgAwIBAgIRAIIQz7DSQONZRGPgu2OCiwAwDQYJKoZIhvcNAQELBQAw\n" \
  "TzELMAkGA1UEBhMCVVMxKTAnBgNVBAoTIEludGVybmV0IFNlY3VyaXR5IFJlc2Vh\n" \
  "cmNoIEdyb3VwMRUwEwYDVQQDEwxJU1JHIFJvb3QgWDEwHhcNMTUwNjA0MTEwNDM4\n" \
  "WhcNMzUwNjA0MTEwNDM4WjBPMQswCQYDVQQGEwJVUzEpMCcGA1UEChMgSW50ZXJu\n" \
  "ZXQgU2VjdXJpdHkgUmVzZWFyY2ggR3JvdXAxFTATBgNVBAMTDElTUkcgUm9vdCBY\n" \
  "MTCCAiIwDQYJKoZIhvcNAQEBBQADggIPADCCAgoCggIBAK3oJHP0FDfzm54rVygc\n" \
  "h77ct984kIxuPOZXoHj3dcKi/vVqbvYATyjb3miGbESTtrFj/RQSa78f0uoxmyF+\n" \
  "0TM8ukj13Xnfs7j/EvEhmkvBioZxaUpmZmyPfjxwv60pIgbz5MDmgK7iS4+3mX6U\n" \
  "A5/TR5d8mUgjU+g4rk8Kb4Mu0UlXjIB0ttov0DiNewNwIRt18jA8+o+u3dpjq+sW\n" \
  "T8KOEUt+zwvo/7V3LvSye0rgTBIlDHCNAymg4VMk7BPZ7hm/ELNKjD+Jo2FR3qyH\n" \
  "B5T0Y3HsLuJvW5iB4YlcNHlsdu87kGJ55tukmi8mxdAQ4Q7e2RCOFvu396j3x+UC\n" \
  "B5iPNgiV5+I3lg02dZ77DnKxHZu8A/lJBdiB3QW0KtZB6awBdpUKD9jf1b0SHzUv\n" \
  "KBds0pjBqAlkd25HN7rOrFleaJ1/ctaJxQZBKT5ZPt0m9STJEadao0xAH0ahmbWn\n" \
  "OlFuhjuefXKnEgV4We0+UXgVCwOPjdAvBbI+e0ocS3MFEvzG6uBQE3xDk3SzynTn\n" \
  "jh8BCNAw1FtxNrQHusEwMFxIt4I7mKZ9YIqioymCzLq9gwQbooMDQaHWBfEbwrbw\n" \
  "qHyGO0aoSCqI3Haadr8faqU9GY/rOPNk3sgrDQoo//fb4hVC1CLQJ13hef4Y53CI\n" \
  "rU7m2Ys6xt0nUW7/vGT1M0NPAgMBAAGjQjBAMA4GA1UdDwEB/wQEAwIBBjAPBgNV\n" \
  "HRMBAf8EBTADAQH/MB0GA1UdDgQWBBR5tFnme7bl5AFzgAiIyBpY9umbbjANBgkq\n" \
  "hkiG9w0BAQsFAAOCAgEAVR9YqbyyqFDQDLHYGmkgJykIrGF1XIpu+ILlaS/V9lZL\n" \
  "ubhzEFnTIZd+50xx+7LSYK05qAvqFyFWhfFQDlnrzuBZ6brJFe+GnY+EgPbk6ZGQ\n" \
  "3BebYhtF8GaV0nxvwuo77x/Py9auJ/GpsMiu/X1+mvoiBOv/2X/qkSsisRcOj/KK\n" \
  "NFtY2PwByVS5uCbMiogziUwthDyC3+6WVwW6LLv3xLfHTjuCvjHIInNzktHCgKQ5\n" \
  "ORAzI4JMPJ+GslWYHb4phowim57iaztXOoJwTdwJx4nLCgdNbOhdjsnvzqvHu7Ur\n" \
  "TkXWStAmzOVyyghqpZXjFaH3pO3JLF+l+/+sKAIuvtd7u+Nxe5AW0wdeRlN8NwdC\n" \
  "jNPElpzVmbUq4JUagEiuTDkHzsxHpFKVK7q4+63SM1N95R1NbdWhscdCb+ZAJzVc\n" \
  "oyi3B43njTOQ5yOf+1CceWxG1bQVs5ZufpsMljq4Ui0/1lvh+wjChP4kqKOJ2qxq\n" \
  "4RgqsahDYVvTH9w7jXbyLeiNdd8XM2w9U/t7y0Ff/9yi0GE44Za4rF2LN9d11TPA\n" \
  "mRGunUHBcnWEvgJBQl9nJEiU0Zsnvgc/ubhPgXRR4Xq37Z0j4r7g1SgEEzwxA57d\n" \
  "emyPxgcYxn/eR44/KJ4EBs+lVDR3veyJm+kXQ99b21/+jh5Xos1AnX5iItreGCc=\n" \
  "-----END CERTIFICATE-----\n";

const char* ESP_CA_cert = \
  "-----BEGIN CERTIFICATE-----\n" \
  "-----END CERTIFICATE-----\n";

const char* ESP_RSA_key= \
  "-----BEGIN PRIVATE KEY-----\n" \
  "-----END PRIVATE KEY-----\n";

WiFiClientSecure espClient;
PubSubClient mqtt_client(espClient);

long lastMsg = 0;

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

  setup_wifi();
  //Set up the certificates and keys
  espClient.setCACert(CA_cert);          //Root CA certificate
  //espClient.setCertificate(ESP_CA_cert); //for client verification if the require_certificate is set to true in the mosquitto broker config
  //espClient.setPrivateKey(ESP_RSA_key);  //for client verification if the require_certificate is set to true in the mosquitto broker config

  mqtt_client.setServer(mqtt_server, mqtt_port);
  mqtt_client.setCallback(callback);
}

void setup_wifi() {
  delay(10);
  // We start by connecting to a WiFi network
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(ssid);

  WiFi.begin(ssid, password);

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

  Serial.println("");
  Serial.println("WiFi connected");
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());
}

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

  // Feel free to add more if statements to control more GPIOs with MQTT

  // If a message is received on the topic esp32/output, you check if the message is either "on" or "off". 
  // Changes the output state according to the message
  if (String(topic) == "esp32/output") {
    Serial.print("Changing output to ");
    if(messageTemp == "on"){
      Serial.println("on");
    }
    else if(messageTemp == "off"){
      Serial.println("off");
    }
  }
}

void reconnect() {
  // Loop until we're reconnected
  while (!mqtt_client.connected()) {
    Serial.print("Attempting MQTT connection...");
    // Attempt to connect
    if (mqtt_client.connect("ESP32", mqtt_user , mqtt_pass)) {
      Serial.println("connected");
      // Subscribe
      mqtt_client.subscribe("esp32/output1");
      mqtt_client.subscribe("esp32/output2");
    } else {
      Serial.print("failed, rc=");
      Serial.print(mqtt_client.state());
      Serial.println(" try again in 5 seconds");
      // Wait 5 seconds before retrying
      delay(5000);
    }
  }
}

float topicA = 0.0;
float topicB = 0.5;
void loop() {
  if (!mqtt_client.connected()) {
    reconnect();
  }
  mqtt_client.loop();

  long now = millis();
  if (now - lastMsg > 5000) {
    lastMsg = now;
    
    // Convert the value to a char array
    char topicAString[8];
    dtostrf(topicA, 1, 2, topicAString);
    Serial.print("TopicA: ");
    Serial.println(topicAString);
    mqtt_client.publish("esp32/topicA", topicAString);
    topicA++;
       
    // Convert the value to a char array
    char topicBString[8];
    dtostrf(topicB, 1, 2, topicBString);
    Serial.print("TopicB: ");
    Serial.println(topicBString);
    mqtt_client.publish("esp32/topicB", topicBString);
    topicB++;
  }
}