#include <Adafruit_MPU6050.h>
#include <Adafruit_Sensor.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <WiFi.h>
#include <PubSubClient.h>

// LCD and MPU6050 initialization
LiquidCrystal_I2C lcd(0x27, 20, 4);
Adafruit_MPU6050 mpu;

// WiFi and MQTT credentials
const char* ssid = "Wokwi-GUEST";
const char* password = "";
const char* mqtt_server = "good-moose.com";
const char* mqttTopic = "/ENGEA110/043-2";


WiFiClient espClient;
PubSubClient client(espClient);
unsigned long lastMsg = 0;
#define MSG_BUFFER_SIZE (50)
char msg[MSG_BUFFER_SIZE];
int value = 0;

// Function to connect to WiFi
void setup_wifi() {
  delay(10);
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(ssid);

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

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

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

// MQTT callback function
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();
}

// Reconnect to MQTT server
void reconnect() {
  while (!client.connected()) {
    Serial.print("Attempting MQTT connection...");
    String clientId = "ESP8266Client-";
    clientId += String(random(0xffff), HEX);
    if (client.connect(clientId.c_str())) {
      Serial.println("connected");
      client.publish("outTopic", "hello world");
      client.subscribe("inTopic");
    } else {
      Serial.print("failed, rc=");
      Serial.print(client.state());
      Serial.println(" try again in 5 seconds");
      delay(5000);
    }
  }
}

void setup(void) {
  Serial.begin(115200);
  while (!Serial) delay(1000);

  Serial.println("Adafruit MPU6050 test!");

  // Initialize MPU6050
  if (!mpu.begin()) {
    Serial.println("Failed to find MPU6050 chip");
    while (1) { delay(1000); }
  }
  Serial.println("MPU6050 Found!");

  mpu.setAccelerometerRange(MPU6050_RANGE_8_G);
  mpu.setGyroRange(MPU6050_RANGE_500_DEG);
  mpu.setFilterBandwidth(MPU6050_BAND_5_HZ);

  lcd.init();
  lcd.backlight();
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Hello World");

  // Set up WiFi and MQTT
  setup_wifi();
  client.setServer(mqtt_server, 1883);
  client.setCallback(callback);
}

void loop() {
  if (!client.connected()) {
    reconnect();
  }
  client.loop();

  sensors_event_t a, g, temp;
  mpu.getEvent(&a, &g, &temp);

  // Print out the values
  Serial.print("Acceleration X: ");
  Serial.print(a.acceleration.x);
  Serial.print(", Y: ");
  Serial.print(a.acceleration.y);
  Serial.print(", Z: ");
  Serial.print(a.acceleration.z);
  Serial.println(" m/s^2");

  Serial.print("Rotation X: ");
  Serial.print(g.gyro.x);
  Serial.print(", Y: ");
  Serial.print(g.gyro.y);
  Serial.print(", Z: ");
  Serial.print(g.gyro.z);
  Serial.println(" rad/s");

  Serial.print("Temperature: ");
  Serial.print(temp.temperature);
  Serial.println(" degC");
  Serial.println("");

  // Display data on LCD
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Acc X: ");
  lcd.print(a.acceleration.x);
  lcd.setCursor(0, 1);
  lcd.print("Acc Y: ");
  lcd.print(a.acceleration.y);
  lcd.setCursor(0, 2);
  lcd.print("Acc Z: ");
  lcd.print(a.acceleration.z);
  lcd.setCursor(11, 0);
  lcd.print(" X: ");
  lcd.print(g.gyro.x);
  lcd.setCursor(11, 1);
  lcd.print(" Y: ");
  lcd.print(g.gyro.y);
  lcd.setCursor(11, 2);
  lcd.print(" Z: ");
  lcd.print(g.gyro.z);
  lcd.setCursor(0, 3);
  lcd.print("Temp: ");
  lcd.print(temp.temperature);
  lcd.println(" C");

  delay(1000);

  // Create JSON message
  String msg = "{";
  msg += "\"Ax\":" + String(a.acceleration.x) + ",";
  msg += "\"Ay\":" + String(a.acceleration.y) + ",";
  msg += "\"Az\":" + String(a.acceleration.z) + ",";
  msg += "\"Gx\":" + String(g.gyro.x) + ",";
  msg += "\"Gy\":" + String(g.gyro.y) + ",";
  msg += "\"Gz\":" + String(g.gyro.z) + ",";
  msg += "\"Temperature\":" + String(temp.temperature);
  msg += "}";
}