#include <WiFi.h>
#include <PubSubClient.h>
#include <ArduinoJson.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
Adafruit_SSD1306 oled(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);
int start1 = 0;
int stop1 = 0;
int s11 = 0;
int s21 = 0;
int s31 = 0;
int s41 = 0;
const char* ssid = "Wokwi-GUEST";
const char* password = "";
const char* mqtt_server = "broker.emqx.io";
const char* pub0 = "nim01/lb1";
const char* pub1 = "nim01/lb2";
const char* pub2 = "nim01/lb3";
const char* pub3 = "nim01/lb4";
const char* pub4 = "nim01/lb5";
const char* pub5 = "nim01/lb6";
const char* sub = "nim01/data";
WiFiClient espClient;
PubSubClient client(espClient);
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());
}
void callback(char* topic, byte* payload, unsigned int length) {
  JsonDocument doc;
  deserializeJson(doc, payload);
  bool a = doc["a"];
  if (a == true) digitalWrite(19, HIGH);
  else digitalWrite(19, LOW);
  Serial.print(a);
  Serial.print(",");
  int b = doc["b"];
  Serial.println(b);
  oled.clearDisplay(); // clear display
  oled.setTextSize(2);         // set text size
  oled.setTextColor(WHITE);    // set text color
  oled.setCursor(0, 2);       // set position to display (x,y)
  oled.println("Jml Botol"); // set text
  oled.setTextSize(3);         // set text size
  oled.setCursor(0, 20);      // set position to display (x,y)
  oled.println(b); // set text
  oled.display();              // display on OLED
}
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");
      client.subscribe(sub);
    } else {
      Serial.print("failed, rc=");
      Serial.print(client.state());
      Serial.println(" try again in 5 seconds");
      delay(5000);
    }
  }
}
void setup() {
  Serial.begin(115200);
  pinMode(32, INPUT_PULLUP);
  pinMode(33, INPUT_PULLUP);
  pinMode(25, INPUT_PULLUP);
  pinMode(26, INPUT_PULLUP);
  pinMode(27, INPUT_PULLUP);
  pinMode(14, INPUT_PULLUP);
  pinMode(19, OUTPUT);
  setup_wifi();
  client.setServer(mqtt_server, 1883);
  client.setCallback(callback);
  if (!oled.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
    Serial.println(F("failed to start SSD1306 OLED"));
    while (1);
  }
  delay(2000);         // wait two seconds for initializing
  oled.clearDisplay(); // clear display
  oled.setTextSize(2);         // set text size
  oled.setTextColor(WHITE);    // set text color
  oled.setCursor(0, 0);       // set position to display (x,y)
  oled.println("Jml Botol"); // set text
  oled.setTextSize(3);         // set text size
  oled.setCursor(0, 20);       // set position to display (x,y)
  oled.println("0"); // set text
  oled.display();              // display on OLED
}
void loop() {
  if (!client.connected()) {
    reconnect();
  }
  client.loop();
  int start = !digitalRead(32);
  int stop = !digitalRead(33);
  int s1 = !digitalRead(25);
  int s2 = !digitalRead(26);
  int s3 = !digitalRead(27);
  int s4 = !digitalRead(14);
  if (start != start1) {
    if (start) {
      Serial.println("{\"a\":true}");
      client.publish(pub0, "{\"a\":true}");
      delay(50);
    }
    else {
      Serial.println("{\"a\":false}");
      client.publish(pub0, "{\"a\":false}");
      delay(50);
    }
  }
  start1 = start;
  if (stop != stop1) {
    if (stop) {
      Serial.println("{\"b\":true}");
      client.publish(pub1, "{\"b\":true}");
      delay(50);
    }
    else {
      Serial.println("{\"b\":false}");
      client.publish(pub1, "{\"b\":false}");
      delay(50);
    }
  }
  stop1 = stop;
  if (s1 != s11) {
    if (s1) {
      Serial.println("{\"c\":true}");
      client.publish(pub2, "{\"c\":true}");
      delay(50);
    }
    else {
      Serial.println("{\"c\":false}");
      client.publish(pub2, "{\"c\":false}");
      delay(50);
    }
  }
  s11 = s1;
  if (s2 != s21) {
    if (s2) {
      Serial.println("{\"d\":true}");
      client.publish(pub3, "{\"d\":true}");
      delay(50);
    }
    else {
      Serial.println("{\"d\":false}");
      client.publish(pub3, "{\"d\":false}");
      delay(50);
    }
  }
  s21 = s2;
  if (s3 != s31) {
    if (s3) {
      Serial.println("{\"e\":true}");
      client.publish(pub4, "{\"e\":true}");
      delay(50);
    }
    else {
      Serial.println("{\"e\":false}");
      client.publish(pub4, "{\"e\":false}");
      delay(50);
    }
  }
  s31 = s3;
  if (s4 != s41) {
    if (s4) {
      Serial.println("{\"f\":true}");
      client.publish(pub5, "{\"f\":true}");
      delay(50);
    }
    else {
      Serial.println("{\"f\":false}");
      client.publish(pub5, "{\"f\":false}");
      delay(50);
    }
  }
  s41 = s4;
}