#include <ESP8266WiFi.h>
#include <PubSubClient.h>
extern "C" {
#include "user_interface.h"
}
#include <ESP8266WiFi.h>
#include <PubSubClient.h>
#include <Adafruit_NeoPixel.h>
#ifdef __AVR__
#include <avr/power.h>
#endif
#define PIN 14

Adafruit_NeoPixel strip = Adafruit_NeoPixel(6, PIN, NEO_GRB + NEO_KHZ800);

//////// Network stuff ///////////////////////////////////////

const char* ssid = "my_ssid";
const char* password = "my_wifi_password";
const char* mqtt_server = "my_mqtt_server_address";

WiFiClient espClient;
PubSubClient client(espClient);
long lastMsg = 0;
char msg[50];
int value = 0;
int r;
int g;
int b;


/////////// Wifi Setup section //////////////////////////////////////

void setup_wifi() {

  delay(10);
  // We start by connecting to a WiFi network
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(ssid);
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("");
  Serial.println("WiFi connected");
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());
}

////////////// Color Wipe /////////

void colorWipe(uint32_t c, uint8_t wait) {
  for(uint16_t i=0; i<strip.numPixels(); i++) {
    strip.setPixelColor(i, c);
    strip.show();
    delay(wait);
  }
  }

//////////////////// Callback ////////////////////////////

void callback(char* topic, byte* payload, unsigned int length) {

  String receivedtopic = topic;
  String receivedpayload ;

  for (int i = 0; i < length; i++) {
    receivedpayload += (char)payload[i];
  }

  Serial.print(receivedtopic);
  Serial.print(" => ");
  Serial.println(receivedpayload);
  int myvalue;

/* THIS LINE TOOK AGES TO SORT (BELOW)
 I HAS TO CHANGE THE STRING (receivedpayload) into an int)
*/

  myvalue = (receivedpayload.toInt());
  Serial.print(myvalue);
  if(myvalue < 10)
    {
    r = 25;
    g = 0;
    b = 0;
    }
    else if(myvalue < 25)
    {
    b = map(myvalue, 10, 25, 0, 25);
    r = map(myvalue, 10, 25, 25,25);
    g = map(myvalue, 10, 25, 0, 25);
    }
    else if(myvalue > 25)
    {
    g = 25;
    r = 25;
    b = 25;
    }
  colorWipe(strip.Color(r, g, b), 10);
    }

//////////////////// Setup /////////////////////////

void setup() {
  Serial.begin(115200);
  setup_wifi();
  client.setServer(mqtt_server, 1883);
  client.setCallback(callback);
  strip.begin();
  strip.show(); // Initialize all pixels to 'off'
}

////////////////////// Reconnect /////////////////////////////

void reconnect() {
  // Loop until we're reconnected
  while (!client.connected()) {
    Serial.print("Attempting MQTT connection...");
    // Attempt to connect
    if (client.connect("ESP12_DOWNLOAD", "mqtt_username", "mqtt_password")) {
      Serial.println("connected");
      client.subscribe("internet/download");
  //     client.subscribe("temp1");
    } else {
      Serial.print("failed, rc=");
      Serial.print(client.state());
      Serial.println(" try again in 5 seconds");
      // Wait 5 seconds before retrying
      delay(5000);
    }
  }
}

/////////////////////// Void loop ///////////////////////////

void loop() {

    if (!client.connected()) {
    reconnect();
  }
  client.loop();
/*
  long now = millis();
  if (now - lastMsg > 20000) {
    lastMsg = now;
    ++value;
    snprintf (msg, 75, "hello world #%ld", value);
    Serial.print("Publish message: ");
    Serial.println(msg);
    client.publish("outTopic", msg);
  }
*/

}