/*
  This a simple example of the aREST Library for the ESP8266 WiFi chip.
  This example illustrate the cloud part of aREST that makes the board accessible from anywhere
  See the README file for more details.

  Written in 2015 by Marco Schwartz under a GPL license, forked by Skickar and MinePro120
*/

// Import required libraries
#include <ESP8266WiFi.h>
#include <PubSubClient.h>
#include <aREST.h>

// Clients
WiFiClient espClient;
PubSubClient client(espClient);

// Create aREST instance
aREST rest = aREST(client);

// Unique ID to identify the device for cloud.arest.io
char* device_id = "unique_device_id";

// WiFi parameters
const char* ssid = "<Your network's SSID here>";
const char* password = "<Your network's password here>";
const char* mssid = "<The desired SSID of the AP here>";    //see line 47 for more AP options, and edit line 54
const char* mpassword = "<The desired password of the AP here>";

// Variables to be exposed to the API
int temperature;
int humidity;
String local_ip = "";

// The port to listen for incoming TCP connections. You are advised to change this.
#define LISTEN_PORT 80

// Create an instance of the server
WiFiServer server(LISTEN_PORT);

// Functions
void callback(char* topic, byte* payload, unsigned int length);

void setup(void)
{
  /* Create a Soft AP
    mssid - character string containing network SSID (max. 31 characters)
    mpassword - optional character string with a password. For WPA2-PSK network it should be at least 8 character long. If not specified, the access point will be open for anybody to connect, (max. 63 characters).
    channel - optional parameter to set Wi-Fi channel, from 1 to 13. Default channel = 1.
    hidden - optional parameter, if set to true will hide SSID.
    max_connection - optional parameter to set max simultaneous connected stations, from 0 to 8. Defaults to 4. Once the max number has been reached, any other station that wants to connect will be forced to wait until an already connected station disconnects.
  */
  Serial.print("Setting soft-AP... ");
  Serial.println(WiFi.softAP(mssid, mpassword, channel, hidden, max_connection) ? "Ready" : "Failed!");
  Serial.print("Soft-AP IP address = ");
  Serial.println(WiFi.softAPIP());
  // Start Serial
  Serial.begin(115200);

  // Set callback
  client.setCallback(callback);

  // Init variables and expose them to REST API
  temperature = 24;
  humidity = 40;
  rest.variable("temperature", &temperature);
  rest.variable("humidity", &humidity);
  rest.variable("local_ip", &local_ip);

  // Give name & ID to the device (ID should be 6 characters long)
  rest.set_id(device_id);
  rest.set_name("esp8266");

  // Connect to WiFi
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("");
  Serial.println("WiFi connected");

  // Start the server
  server.begin();
  Serial.println("Local server started on IP:");

  // Print the IP address
  Serial.println(WiFi.localIP());
  local_ip = ipToString(WiFi.localIP());

}

void loop() {

  // Connect to the cloud
  rest.handle(client);

  // Handle Local aREST calls
  WiFiClient clientLocal = server.available();
  if (!clientLocal) {
    return;
  }
  while(!clientLocal.available()){
    delay(1);
  }
  rest.handle(clientLocal);

}

// Handles message arrived on subscribed topic(s)
void callback(char* topic, byte* payload, unsigned int length) {

  rest.handle_callback(client, topic, payload, length);

}

// Convert IP address to String
String ipToString(IPAddress address)
{
  return String(address[0]) + "." +
    String(address[1]) + "." +
    String(address[2]) + "." +
    String(address[3]);
}