//Libraries
#include <DHT.h>
#include <ESP8266WiFi.h>
#include <ArduinoJson.h>

#define DHTPIN 2     // what digital pin we're connected to

#define DHTTYPE DHT22   // DHT 22  (AM2302), AM2321

DHT dht(DHTPIN, DHTTYPE);

// ACCOUNT SETUP CONSTANTS
const int nodeID      = ESP.getChipId();
const char* ssid      = "Belkin.32C7";  // WiFi Router SSID *Usually on side or bottom of router*
const char* password  = "44579397";     // WiFi Router Password *Usually on side or bottom of router*
const char* apiHost   = "192.168.2.3"; // Local cannacle API server *the PCduino's assigned Hostname*
  const int apiPort   = 80;

void setup()
{
  Serial.begin(57600);
  dht.begin();
  delay(2000);


  // We start by connecting to a WiFi network...
  WiFi.begin(ssid, password);

  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
  }

  Serial.print("connecting to ");
  Serial.println(apiHost);

  // Variables
  String url;
  String request;

  // Use WiFiClient class to create TCP connections
  WiFiClient client;
  if (!client.connect(apiHost, apiPort)) {
    Serial.println(String(apiHost) + " : connection failed");
    return;
  }

  Serial.print("Requesting URL: ");
  Serial.println(url);

  // Read Temp & Humdity data and store it to variables...
  float humidity = dht.readHumidity();
  float airTempC = dht.readTemperature();
  float airTempF = dht.readTemperature(true);

  StaticJsonBuffer<200> jsonBuffer;

  JsonObject& device  = jsonBuffer.createObject();
  device["node_id"]   = nodeID;
  device["sensors"]   = "DHT22";

  JsonObject& data = device.createNestedObject("data");
  data["humidity"]  = String(humidity);  // 6 is the number of decimals to print
  data["air_tempC"]  = String(airTempC);   // if not specified, 2 digits are printed
  data["air_tempF"]  = String(airTempF);

  device.printTo(request);
  // We now create a URI for the request
  url = "/?request=" + urlencode(request);

  // This will send the request to the server
  client.print(String("GET ") + url + " HTTP/1.1\r\n" + "Host: " + apiHost + "\r\n" + "Connection: close\r\n\r\n");
  delay(1000);

  // Read all the lines of the reply from server and print them to Serial
  String response;
  long sleepTime = 0;
  while(client.available()){
    response = client.readString();
  }
  Serial.print(response);
  JsonObject& responseObj = jsonBuffer.parseObject(response);
  if (!responseObj.success()){Serial.println("B0rken!");}
  sleepTime          = responseObj["sleep_interval"];
  if (sleepTime == 0) {
    sleepTime = 600000000;
  }
  ESP.deepSleep(sleepTime);
  delay(1000);
}
//
//
void loop()
{

}
//
//
String urldecode(String str)
{

    String encodedString="";
    char c;
    char code0;
    char code1;
    for (int i =0; i < str.length(); i++){
        c=str.charAt(i);
      if (c == '+'){
        encodedString+=' ';
      }else if (c == '%') {
        i++;
        code0=str.charAt(i);
        i++;
        code1=str.charAt(i);
        c = (h2int(code0) << 4) | h2int(code1);
        encodedString+=c;
      } else{

        encodedString+=c;
      }

      yield();
    }
   return encodedString;
}

String urlencode(String str)
{
    String encodedString="";
    char c;
    char code0;
    char code1;
    char code2;
    for (int i =0; i < str.length(); i++){
      c=str.charAt(i);
      if (c == ' '){
        encodedString+= '+';
      } else if (isalnum(c)){
        encodedString+=c;
      } else{
        code1=(c & 0xf)+'0';
        if ((c & 0xf) >9){
            code1=(c & 0xf) - 10 + 'A';
        }
        c=(c>>4)&0xf;
        code0=c+'0';
        if (c > 9){
            code0=c - 10 + 'A';
        }
        code2='\0';
        encodedString+='%';
        encodedString+=code0;
        encodedString+=code1;
        //encodedString+=code2;
      }
      yield();
    }
    return encodedString;

}

unsigned char h2int(char c)
{
    if (c >= '0' && c <='9'){
        return((unsigned char)c - '0');
    }
    if (c >= 'a' && c <='f'){
        return((unsigned char)c - 'a' + 10);
    }
    if (c >= 'A' && c <='F'){
        return((unsigned char)c - 'A' + 10);
    }
    return(0);
}