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

//Variables
const char* ssid   = "";
const char* pasw   = "";
const char* hwId   = "";
const char* url    = "http://dev.steelants.cz/vasek/home/api.php";
int unsuccessfulRounds = 0;

//Pins
#define pinDHT 4
#define LIGHTPIN A0

//Inicializations
DHT DHTs(pinDHT, DHT11);

void setup() {
    Serial.begin(9600);
    while (!Serial) continue;
    delay(10);
    Serial.println('\n');
    Serial.println("HW: " + String(hwId));
    
    pinMode(LIGHTPIN, INPUT);
}

void loop() {
    WiFi.begin(ssid, pasw);
    checkConnection();
    
    //HTTP CLIENT
    HTTPClient http;
    http.begin(url);
    http.addHeader("Content-Type", "text/plain");  //Specify content-type header
    
    DHTs.begin();
    
    //JsonDocsDefinition
    StaticJsonDocument<265> doc;
    doc["token"] = hwId;
    
    float tem = DHTs.readTemperature();
    float hum = DHTs.readHumidity();
    Serial.println("TEMP" + String(tem) + ";HUMI" + String(hum));
    if (isnan(tem) || isnan(hum)) {
        Serial.println("Unable to read DHT");
    } else {
        doc["values"]["temp"]["value"] = tem;
        doc["values"]["temp"]["unit"] = "C";
        doc["values"]["humi"]["value"] = hum;
        doc["values"]["humi"]["unit"] = "%";
    }
    
    doc["values"]["light"]["value"] = analogRead(LIGHTPIN);
    doc["values"]["light"]["unit"] = "";
    
    /*More Senzores to come*/
    String jsonPayload = "";
    serializeJson(doc, jsonPayload);
    Serial.print("JSON: ");
    Serial.println(jsonPayload);
    
    int httpCode = http.POST(jsonPayload);
    String httpPayload = http.getString();  //Get the response payload
    Serial.println("HTTP CODE: " + String(httpCode) + ""); //Print HTTP return code
    Serial.println("HTTP BODY: " + String(httpPayload) + "");  //Print request response payload
    
    DeserializationError error = deserializeJson(doc, httpPayload);
    
    //configuration setup
    String hostName = doc["device"]["hostname"];
    int sleepTime = doc["device"]["sleepTime"];
    String ipAddress = doc["device"]["ipAddress"];
    String state = doc["state"];
    
    if (state != "succes") {
        unsuccessfulRounds++;
        Serial.println("UNSUCCESSFUL ROUND NUMBER " + unsuccessfulRounds + "FROM 5");
    } else if (state == "succes") {
        unsuccessfulRounds = 0;
    }
    
    //Set static ip 
    IPAddress addr;
    if (addr.fromString(ipAddress)) {
        IPAddress ip(addr);
        Serial.print("IP address:\t");
        Serial.println(WiFi.localIP()); 
    }
    
    WiFi.hostname(hostName);
    
    http.end();  //Close connection
    Serial.println("DISCONECTED FROM WIFI");
    WiFi.disconnect();
    
    if(unsuccessfulRounds == 5) {
        Serial.println("RESTARTING ESP");
        ESP.restart()
    }
    
    Serial.println("GOING TO SLEEP FOR " + String(sleepTime));
    if (sleepTime > 0) {
        ESP.deepSleep((sleepTime * 60) * 1000000, RF_DEFAULT);
    } else {
        delay(5000);
    }
}

bool checkConnection() {
    int count = 0;
    Serial.print("Waiting for Wi-Fi connection");
    while ( count < 30 ) {
        if (WiFi.status() == WL_CONNECTED) {
            Serial.println();
            Serial.println("Connected!");
            return (true);
        }
        delay(500);
        Serial.print(".");
        count++;
    }
    Serial.println("Timed out.");
    return false;
}