#include <Arduino.h>
#include <ArduinoJson.h>

#include <ESP8266WiFi.h>
#include <ESP8266WiFiMulti.h>

#include <ESP8266HTTPClient.h>

#define USE_SERIAL Serial

ESP8266WiFiMulti WiFiMulti;
char macAddr[18];

// Generated with: https://arduinojson.org/assistant/
const size_t bufferSize = JSON_OBJECT_SIZE(3) + 50;
DynamicJsonBuffer jsonBuffer(bufferSize);

void setup() {

    pinMode(D2, OUTPUT);
    digitalWrite(D2, HIGH);

    USE_SERIAL.begin(115200);
   // USE_SERIAL.setDebugOutput(true);

    USE_SERIAL.println();
    USE_SERIAL.println();
    USE_SERIAL.println();

    for(uint8_t t = 4; t > 0; t--) {
        USE_SERIAL.printf("[SETUP] WAIT %d...\n", t);
        USE_SERIAL.flush();
        delay(1000);
    }

    WiFi.mode(WIFI_STA);
    WiFiMulti.addAP("Protospace", "yycmakers");

    byte ar[6];
    WiFi.macAddress(ar);
    sprintf(macAddr, "%02X%02X%02X%02X%02X%02X", ar[0], ar[1], ar[2], ar[3], ar[4], ar[5]);
    USE_SERIAL.println(macAddr);

}

void loop() {
    // wait for WiFi connection
    if((WiFiMulti.run() == WL_CONNECTED)) {

        HTTPClient http;

        USE_SERIAL.print("[HTTP] begin...\n");
        // configure traged server and url
        //http.begin("https://192.168.1.12/test.html", "7a 9c f4 db 40 d3 62 5a 6e 21 bc 5c cc 66 c8 3e a1 45 59 38"); //HTTPS
        http.begin(String("http://172.17.32.164:3000/api/tool/") + macAddr); //HTTP

        USE_SERIAL.print("[HTTP] GET...\n");
        // start connection and send HTTP header
        int httpCode = http.GET();

        // httpCode will be negative on error
        if(httpCode > 0) {
            // HTTP header has been send and Server response header has been handled
            USE_SERIAL.printf("[HTTP] GET... code: %d\n", httpCode);

            // file found at server
            if(httpCode == HTTP_CODE_OK) {
                String payload = http.getString();
                USE_SERIAL.println(payload);
                JsonObject& root = jsonBuffer.parseObject(payload);

                bool relayOn = root["relayOn"]; // true
                bool ledOn = root["ledOn"]; // true
                const char* date = root["date"]; // "2018-02-01"

                USE_SERIAL.println(String("relayOn: ") + relayOn + String(" ledOn: ") + ledOn + String(" Date: ") + date);   

                digitalWrite(D2, !relayOn);
                
            }
        } else {
            USE_SERIAL.printf("[HTTP] GET... failed, error: %s\n", http.errorToString(httpCode).c_str());
        }

        http.end();
    }

    delay(10000);
}