//Includes
#include <ESP8266WiFi.h>
#include <ESP8266HTTPClient.h>
#include <ArduinoJson.h>

//Variables
const char* ssid = "SteelAntsNET";
const char* pasw = "tgr786hgtp3CZ";
const char* server = "http://dev.steelants.cz/vasek/home/api.php";
const char* hwId = "tatsad5";
int lastState = 0;
int reconectAtemptsMax = 10; //time to wait before restart

//Constant
#define SONOFF 12
#define SONOFF_LED 13
#define SONOFF_BUT 0


void setup() {
    Serial.begin(9600);
    delay(10);
  Serial.println('\n');
    Serial.println("HW: " + String(hwId));
    
    pinMode(SONOFF, OUTPUT);
    pinMode(SONOFF_LED, OUTPUT);
    pinMode(SONOFF_BUT, INPUT);
    
    WiFi.persistent(false);
    WiFi.mode(WIFI_STA);
    
    WiFi.begin(ssid, pasw);
    Serial.print("Connecting to ");
  Serial.print(ssid); Serial.println(" ...");

  int i = 0;
  while (WiFi.status() != WL_CONNECTED) { // Wait for the Wi-Fi to connect
    delay(1000);
    Serial.print(++i); Serial.print(' ');
  }

  Serial.println('\n');
  Serial.println("Connection established!");  
  Serial.print("IP address:\t");
  Serial.println(WiFi.localIP());   
}

void loop() {
    
    Serial.println("CONECED");
    bool buttonState = !digitalRead(SONOFF_BUT);
    Serial.println("CONECED" + String(buttonState));

    StaticJsonDocument<200> jsonContent;
    jsonContent["token"] = hwId;
    
    if (!digitalRead(SONOFF_BUT)){
        jsonContent["values"]["on/off"]["value"] = (int) !lastState;
        while(!digitalRead(SONOFF_BUT)) {
            delay(100);
        }
    }
    
    String requestJson = "";
    serializeJson(jsonContent, requestJson);
    Serial.println("JSON: " + requestJson);

    HTTPClient http;
    http.begin(server);
    http.addHeader("Content-Type", "text/plain");  //Specify content-type header
    int httpCode = http.POST(requestJson);
    String payload = http.getString();  //Get the response payload
    http.end();
    
    Serial.println("HTTP CODE: " + String(httpCode) + ""); //Print HTTP return code
    Serial.println("HTTP BODY: " + String(payload) + "");  //Print request response payload
    
    deserializeJson(jsonContent, payload);
    
    String hostname = jsonContent["device"]["hostname"];
    
    WiFi.hostname(hostname);
    
    int state = jsonContent["value"];
    if (state !=  lastState){
      if (state == 1 && lastState == 0) {
          Serial.println("ON");
          digitalWrite(SONOFF, HIGH);   // Turn the LED on by making the voltage LOW
          digitalWrite(SONOFF_LED, LOW);   // Turn the LED on by making the voltage LOW
      } else {
          Serial.println("OFF");
          digitalWrite(SONOFF, LOW);   // Turn the LED on by making the voltage LOW
          digitalWrite(SONOFF_LED, HIGH);   // Turn the LED on by making the voltage LOW
      }
    }
    
    lastState = state;
    delay(1000);
}