#include <WiFi.h>
#include <PubSubClient.h>
#include <ESP32Servo.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>

// Import Seven segment library

char clientId[50];
int servopin1 = 12;
Servo servo1;
int servopin2 = 4;
Servo servo2;
int servopin3 = 15;
Servo servo3;


// Declare date variable

// Configure Seven segment
WiFiClient espClient;
PubSubClient client(espClient);
 
int ledpin1 = 4;
int ledpin2 = 12;
int ledpin3 = 13;
int ledpin4 = 5;

Adafruit_SSD1306 display(128,64,&Wire,1);


void setup() {
  Serial.begin(115200);
  servo1.attach(servopin1,500,2400);
  servo2.attach(servopin2,500,2400);
  servo3.attach(servopin3,500,2400);
  if(!display.begin(SSD1306_SWITCHCAPVCC,0x3C)) {
    Serial.println(F("SSD1306 Allocation Failed"));
    for(;;);
  }
  delay(2000);
  display.clearDisplay();
  display.setTextSize(1);
  display.setTextColor(WHITE);

  Serial.print("Connecting to ....");

  WiFi.mode(WIFI_STA);
  WiFi.begin("Wokwi-GUEST","",6);
  while(WiFi.status() != WL_CONNECTED){
    delay(100);
  }
  
  client.setServer("broker.emqx.io", 1883);
  client.setCallback(callback);
  pinMode(ledpin1, OUTPUT);
  pinMode(ledpin2, OUTPUT);
  pinMode(ledpin3, OUTPUT);
  pinMode(ledpin4, OUTPUT);
}


void mqttReconnect() {
  while (!client.connected()) {
    Serial.print("Attempting MQTT connection...");
    if (client.connect(clientId)) {
      Serial.println("Connected");
      client.subscribe("topicName/iot");
    } 
    else {
      Serial.print("Connection Failed rc=");
      Serial.print(client.state());
      Serial.println(" trying again in 10 seconds");
      delay(5000);
    }
  }
}



void callback(char* topic, byte* message, unsigned int length) {
  Serial.print("Message arrived on topic:");
  Serial.print(topic);
  Serial.print(" . Message :");
  String stMessage;

  for (int i = 0; i < length; i++){
    
    stMessage += (char)message[i];
  }
  //starts here
  if(stMessage =="1"){
    Serial.println("1");
    display.clearDisplay();
    display.setTextSize(1);
    display.setTextColor(WHITE);
    display.setCursor(10,0);

    display.println("Release Orbital Access Arm");
    display.display();
    servo1.write(180);
  }
  else if(stMessage =="2"){
    Serial.println("2");
    digitalWrite(ledpin1, HIGH);
    display.clearDisplay();
    display.setTextSize(1);
    display.setTextColor(WHITE);
    display.setCursor(10,0);

    display.println("Main Engine Starting");
    display.display();
    servo2.write(0);
  }
  else if(stMessage =="3"){
    Serial.println("3");
    display.clearDisplay();
    display.setTextSize(1);
    display.setTextColor(WHITE);
    display.setCursor(10,0);

    display.println("Activating Hydrogen");
    display.display();
    digitalWrite(ledpin2, HIGH);
  }
  else if(stMessage =="4"){
    Serial.println("4");
    display.clearDisplay();
    display.setTextSize(1);
    display.setTextColor(WHITE);
    display.setCursor(10,0);

    display.println("Main engine ignite");
    display.display();
    digitalWrite(ledpin3, HIGH);
  }
  else if(stMessage =="5"){
    Serial.println("5");
    display.clearDisplay();
    display.setTextSize(1);
    display.setTextColor(WHITE);
    display.setCursor(10,0);

    display.println("Hydrogen Vent Arm");
    display.display();
    servo3.write(360);
  }
  else if(stMessage =="6"){
    Serial.println("6");
    display.clearDisplay();
    display.setTextSize(1);
    display.setTextColor(WHITE);
    display.setCursor(10,0);

    display.println("Ignite Both SRBs");
    display.display(); 
    digitalWrite(ledpin4, HIGH);    
  }
}
void loop() {
  delay(1000);
  if (!client.connected()) 
  {
    mqttReconnect();
  }
  client.loop();

  // Set the number
  // Display the number
  // delay() function
}