#include <ESP8266WiFi.h>
#include <PubSubClient.h>

const char* ssid = "Wifi_Boven";
const char* password = "A8F192685F2A";
const char* mqtt_server = "192.168.1.112";

WiFiClient espClient;
PubSubClient client(espClient);

void setup_wifi() {
  delay(10);
  Serial.println("Connecting");
  WiFi.begin(ssid, password);

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


String getString(byte* payload, unsigned int length) {
  String tmp = "";
  for (int i = 0; i < length; i++)  tmp += (char)payload[i];
  return tmp;
}

void handleLed(int led,byte* payload, unsigned int length) {
  unsigned long time = millis();
  String status = getString(payload, length);
  if(status == "true") digitalWrite(led, HIGH);
  else digitalWrite(led, LOW);
  delay(500);
}

void callback(char* topic, byte* payload, unsigned int length) {
  Serial.println("executed");
  if (strcmp(topic, "ledStatus") == 0) handleLed(BUILTIN_LED, payload, length);
  else if (strcmp(topic, "redLed") == 0) handleLed(2, payload, length);
  else if (strcmp(topic, "greenLed") == 0) handleLed(4, payload, length);
  else if (strcmp(topic, "orangeLed") == 0) handleLed(5, payload, length);
}

void reconnect() {
  // Loop until we're reconnected
  while (!client.connected()) {
    Serial.println("Attempting MQTT connection...");
    // Create a random client ID
    String clientId = "ESP8266Client-";
    clientId += String(random(0xffff), HEX);
    // Attempt to connect
    if (client.connect(clientId.c_str())) {
      client.subscribe("orangeLed");
      client.subscribe("redLed");
      client.subscribe("greenLed");
      client.subscribe("ledStatus");
    }
    else {
      Serial.print("failed, rc=");
      Serial.print(client.state());
      Serial.println(" try again in 5 seconds");
      // Wait 5 seconds before retrying
      delay(5000);
    }
  }
}

void setup() {
  pinMode(BUILTIN_LED, OUTPUT);     // Initialize the BUILTIN_LED pin as an output
  pinMode(2, OUTPUT);
  pinMode(4, OUTPUT);
  pinMode(5, OUTPUT);
  Serial.begin(115200);
  setup_wifi();
  client.setServer(mqtt_server, 1883);
  client.setCallback(callback);
}

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