/*
 * https://github.com/bremme/arduino-tm1637
 * The circuit:
 * connect TM1637 pin CLK to Arduino pin D4
 * connect TM1637 pin DIO to Arduino pin D5
 * connect TM1637 pin Vcc to Arduino pin 5V
 * connect TM1637 pin GND to Arduino pin GND
 */

#include "SevenSegmentTM1637.h"
#include "SevenSegmentExtended.h"
#include "SevenSegmentFun.h"
#include <OneWire.h>
#include <DallasTemperature.h>
#include <ESP8266WiFi.h>
#include <ESP8266HTTPClient.h>

#define ESSID "wa-v101f"
#define ONE_WIRE_BUS 5

const byte PIN_CLK = 12;   // define CLK pin (any digital pin)
const byte PIN_DIO = 14;   // define DIO pin (any digital pin)
SevenSegmentFun    display(PIN_CLK, PIN_DIO);

OneWire oneWire(ONE_WIRE_BUS);
DallasTemperature sensors(&oneWire);

void say(char* str) {
  display.print(str);
  delay(500);
}

char * xstrcpy(char * dest, String src)
{
  int i;
  for(i = 0; i < src.length(); i++) {
    dest[i] = src[i];
  }
  dest[i] = '\0';
  return dest;
}

char * get_ip()
{
  char ip[16];
  xstrcpy(ip, WiFi.localIP().toString());
  return ip;
}

int send_data(char * data)
{
  HTTPClient http;

  Serial.print("[HTTP] begin\n");
  http.begin("http://grezl.eu/wiot/v1/sensor");

  Serial.print("[HTTP] POST\n");
  http.addHeader("Content-Type", "application/x-www-form-urlencoded");
  int http_code = http.POST(data);
  //http.writeToStream(&Serial);
 
  Serial.printf("[HTTP] http code: %d\n", http_code);
  if (http_code > 0) {
 /*   if (http_code == HTTP_CODE_OK) {
      String payload = http.getString();
      Serial.println(payload);
    }
 */
  } else {
    Serial.printf("[HTTP] failed, error: %s\n", http.errorToString(http_code).c_str());
  }
  
  http.end();
  return http_code;
}

void create_line(char * type, char * sn, char * data, float value)
{
  char buf[12];

  strcpy(data, "w_sensor=");

  strcat(data, "type:METEO,");
  strcat(data, "sn:");
  strcat(data, sn);
  strcat(data, ",");
  strcat(data, "temp:");
  dtostrf(value, 5, 2, buf);
  strcat(data, buf);
  strcat(data, ",ip:");
  strcat(data, get_ip());
  strcat(data, ";");
}

void setup() 
{
  Serial.begin(9600);         // initializes the Serial connection @ 9600 baud
  display.begin();            // initializes the display
  display.setBacklight(100);  // set the brightness to 100 %

  sensors.begin();
    
  delay(1000);                // wait 1000 ms
  WiFi.begin(ESSID, "aaaaaaaaa");
}

void loop() 
{
  char tstr[20];
  float t; 
  int tt;
  char data[50]; 

  say("hi  ");

  sensors.requestTemperatures();
  t = sensors.getTempCByIndex(0);
  tt = t * 100;
//  sprintf(tstr, "temperature: %f", t);
  dtostrf(t, 2, 2, tstr);
  say(tstr);
  Serial.print("temp\n");
  Serial.print(t);
  Serial.print("\n");
  Serial.print(tstr);
  Serial.print("\n");
  
  display.setColonOn(true);
  byte  rawData;
  display.print(tt);
  // display degree symbol on position 3 plus set lower colon
  rawData = B11100011;
  display.printRaw(rawData, 3);
  delay(1000);
  display.setColonOn(false);

  create_line("x","meteo2", data, t);
  Serial.println(data);
  
  if((WiFi.status() == WL_CONNECTED)) {
    send_data(data);
  } else {
  }
  
  delay(2000);


}