#include "ESP8266WiFi.h"
#include "HTTPSRedirect.h"

const char* ssid = "SSID";
const char* password = "PASSWORD";
const char* host = "script.google.com";
const char *url = "/macros/s/ID/exec";
const int httpsPort = 443;

void setup() {
    Serial.begin(9600);

    WiFi.mode(WIFI_STA);
    WiFi.begin(ssid, password);

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

    Serial.println("");
    Serial.println("WiFi connected");
    Serial.println("IP address: ");
    Serial.println(WiFi.localIP());
}

void loop() {
    HTTPSRedirect* client = new HTTPSRedirect(httpsPort);
    client->setPrintResponseBody(false);
    client->setContentTypeHeader("application/json");

    bool flag = false;
    for (int i=0; i<5; i++){
        int retval = client->connect(host, httpsPort);
        if (retval == 1) {
            flag = true;
            break;
        }
        else
            Serial.println("Connection failed. Retrying...");
    }

    if (!flag){
        Serial.print("Could not connect to server: ");
        Serial.println(host);
        Serial.println("Exiting...");
        return;
    }

    String payload = "{}";
    client->POST(url, host, payload, false);
    String response = client->getResponseBody();
    Serial.print(response);

    delete client;
    client = nullptr;

    delay(5000);
}