/* https://luuvachiase.net/dashboard/home_v5.php#
 inlog guest0
 ww dashbord
https://wokwi.com/projects/385650849867448321
https://luuvachiase.net/dashboard/home_v5.php#
facebook: esp8266/esp32 Do Thanh Nam
Youtube: Store and share (ESP32 Arduino) @luuvachiase8000
https://luuvachiase.net/
*/

#include <WiFi.h>
#include <PubSubClient.h>
#include <OneWire.h>
#include <DallasTemperature.h>
#include <ArduinoJson.h>
#include "DHTesp.h" 

const char* ssid = "Wokwi-GUEST";
const char* password = "";
const char* mqtt_server = "broker.hivemq.com";
String macAddressString;
  // Set MQTT topics using the MAC address as a string
char stopic[30];
char ptopic[30];
char datatopic[30];
char lwt_topic[30];
char macAddress[18];
 uint8_t mac[6];
bool cn_check = false;

int sw[] = {12, 13, 14};
int pw[] = {25, 26, 27};
 
const int DHT_PIN = 15; // DHT22

const float minValue = 1.05; // Minimum analog value
const float maxValue = 1.26; // Maximum analog value

int count=0;
int alarmt=0;
int auth=0;
int intId =0;
int rsp =0;
int value=0;
int id=0;

String type_data1 = "temp";
String type_data2 = "batt";
String type_data3 = "gas";


DHTesp dhtSensor;

// Define a variable to store the temperature reading
float temperature;
float prv_value;
float humidity;
int percentage;


WiFiClient espClient;
PubSubClient client(espClient);
unsigned long lastMsg = 0;


void setup_wifi() {

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

  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid, password);

   while (WiFi.status() != WL_CONNECTED) {
      digitalWrite(19, HIGH);
      delay(200);
      digitalWrite(19, LOW);
      delay(200);
      Serial.print(".");
    }

  randomSeed(micros());

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

  // Obtain the MAC address as a string
 
  WiFi.macAddress(mac);

  
  sprintf(macAddress, "%02X:%02X:%02X:%02X:%02X:%02X", mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);

    // Convert macAddress to a string
  for (int i = 0; i < 6; i++) {
  char hexChar[8];
  sprintf(hexChar, "%02X", mac[i]);
  macAddressString += hexChar;
  }

  Serial.print("MAC Address: ");
  Serial.println(macAddress);

  sprintf(stopic, "cmd_%s", macAddress);
  //Serial.println(stopic);
  sprintf(lwt_topic, "lwt_topic_%s", macAddress);
  //Serial.println(lwt_topic);
  sprintf(datatopic, "data_topic_%s", macAddress);
  //Serial.println(datatopic);
  sprintf(ptopic, "stt_topic_%s", macAddress);
  //Serial.println(ptopic);


}

void ReceivedMessage(char* topic, byte* payload, unsigned int length) {
  // Output the first character of the message to serial (debug)
  StaticJsonDocument<100> doc;
  deserializeJson(doc, payload, length);
  
  // Extract values from the JSON data
  String mac = doc["mac"];
  String type= doc["type"];
  id = doc["id"];
  value = doc["value"].as<int>();
  rsp = doc["rsp"].as<int>();

  //Serial.print(type);
  //Serial.print(":");
  //Serial.println(value);
  
  if(type=="btn") control_button(id,value,rsp);
  if(type=="sld") control_pwm(id,value,rsp);

}

void control_button(int id,int value, int rsp)
{
  //rsp =1;
  intId = id-1;
  if(value == 1) {digitalWrite(sw[intId], HIGH); Serial.println("HIGH");}
  if(value == 0) {digitalWrite(sw[intId], LOW); Serial.println("LOW");}
  if(rsp ==1) publish_data(3,id,"state",sw[intId]);
}

void control_pwm(int id, int value, int rsp)
{
  id = id-1;
  analogWrite(pw[id], value);
  if(rsp ==1) publish_data(3,id,"pwm",value);
}

void reconnect() {
  // Loop until we're reconnected
  while (!client.connected()) {
    Serial.print("Attempting MQTT connection...");
     while (WiFi.status() != WL_CONNECTED) {
      digitalWrite(19, HIGH);
      delay(200);
      digitalWrite(19, LOW);
      delay(200);
      Serial.print(".");
    }
    // Create a random client ID
    String clientId = "ESP32Client-"+macAddressString;
    Serial.println(clientId);
    //clientId += String(random(0xffff), HEX);
    // Attempt to connect

  StaticJsonDocument<50> lwtJson;
  lwtJson["stt"] = 0; // Customize the JSON data as needed

  // Convert the JSON object to a JSON string
  char lwtMessage[200];
  serializeJson(lwtJson, lwtMessage);
 
    if (client.connect(clientId.c_str(),lwt_topic, 2, true, lwtMessage)) {
      Serial.println("connected");
  cn_check =true;   
  DynamicJsonDocument RtJson(50);
  
  RtJson["stt"] = 1; // Customize the JSON data as needed
  // Convert the JSON object to a JSON string
  String RtMessage;
  
  serializeJson(RtJson, RtMessage);
      // Once connected, publish an announcement...
      const char* pl_RtMessage = RtMessage.c_str();
      client.publish(lwt_topic, pl_RtMessage, true);
       // ... and resubscribe
      client.subscribe(stopic);
    } else {
      cn_check =false;
      Serial.print("failed, rc=");
      Serial.print(client.state());
      Serial.println(" try again in 5 seconds");
      // Wait 5 seconds before retrying
      delay(5000);
    }
  }
}

void publish_data(int stt, int id, String type_data, int pin_to_read) {
   
    DynamicJsonDocument json(80);
    int state = digitalRead(pin_to_read);
    json["stt"] = stt;
    json["id"] = id;
    json["type_data"] = type_data;
    json["value"] = state;

    String jsonString;
    serializeJson(json, jsonString);

    const char* payload = jsonString.c_str();

    //Serial.print("Publishing: ");
    //Serial.println(payload);
    client.publish(datatopic, payload);
    //Serial.println("Done!");
}

void publish_data(int stt, String type_data, float value) {
    // Your existing code for float value
    if (type_data == "temp") prv_value = value;

    DynamicJsonDocument json(100);
    json["stt"] = stt;
    json["type_data"] = type_data;
    json["value"] = value;

    String jsonString;
    serializeJson(json, jsonString);

    const char* payload = jsonString.c_str();

    //Serial.print("Publishing: ");
    //Serial.println(payload);
    client.publish(datatopic, payload);
    //Serial.println("Done!");
}



void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);

  //Serial.println(lwtMessage);
  // Set ADC attenuation to 11dB
  //analogSetAttenuation(ADC_11db); //esp32 only
  //pinMode(3, OUTPUT);     // Initialize the BUILTIN_LED pin as an output
  pinMode(sw[0], OUTPUT); 
  pinMode(sw[1], OUTPUT);
  pinMode(sw[2], OUTPUT);

  digitalWrite(sw[0], HIGH);
  digitalWrite(sw[1], HIGH);
  digitalWrite(sw[2], HIGH);

  pinMode(pw[0], OUTPUT); 
  pinMode(pw[1], OUTPUT);
  pinMode(pw[2], OUTPUT);

  analogWrite(pw[0], 255);
  analogWrite(pw[1], 255);
  analogWrite(pw[2], 255);


  setup_wifi();
  dhtSensor.setup(DHT_PIN, DHTesp::DHT22);
  
  client.setServer(mqtt_server, 1883);
  client.setCallback(ReceivedMessage);

}

void loop() {
 
   if (!client.connected()) {
    cn_check =false;
    reconnect();
  }
  client.loop();
 
  delay(100);
  // Get the temperature reading from the first sensor  publish_temp(float temperature, String type_data)
  TempAndHumidity  data_temp = dhtSensor.getTempAndHumidity();
  temperature = data_temp.temperature;
  humidity = data_temp.humidity;
  delay(100);
  //Serial.println("Hello, ESP32!");

  delay(1000);
  publish_data(3,type_data2, humidity);
  publish_data(3,type_data1, temperature);

  //if (cn_check ==true && temperature!= prv_value1) {publish_data(type_data1, temperature);}
  //if (cn_check ==true && humidity!= prv_value2) {publish_data(type_data2, humidity);}
 
}