#include <Arduino.h>
#include <WiFi.h>
#include <HTTPClient.h>
#include <AsyncTCP.h>

const char* wifi_ssid = "Wokwi-GUEST";
const char* wifi_pass = "";
HTTPClient http;
AsyncClient async;

const char *host = "worldtimeapi.org";
const char *path = "/api/timezone/America/Chicago.txt";


void on_http_connect( void* arg, AsyncClient* client )
{
  Serial.println( ">>> connected" );
  char request[128];
  sprintf( request, "GET %s HTTP/1.1\r\nHost: %s\r\nConnection: close\r\n\r\n", path, host );
  Serial.print( request );
  client->write( request );
}


void on_http_disconnect( void* arg, AsyncClient* client )
{
  Serial.println( ">>> disconnected" );
  client->stop();
}


void on_http_data( void* arg, AsyncClient* client, void *data, size_t len )
{
  Serial.println( ">>> data" );
  char *s = (char *) data;
  Serial.println( s );
}


void setup() 
{
  Serial.begin( 115200 );
  Serial.println();

  WiFi.mode( WIFI_STA );
  WiFi.setAutoReconnect( true );
  WiFi.begin( wifi_ssid, wifi_pass );
  while (WiFi.status() != WL_CONNECTED)
  {
    Serial.println("Waiting for Wifi");
    delay(500);
  }

  async.onConnect( on_http_connect );
  async.onDisconnect( on_http_disconnect );
  async.onData( on_http_data );
  async.connect( host, 80 );
}


void loop() 
{
  // Serial.println( "[HTTP] begin ..." );
  // http.begin( "http://www.example.com" );
  // const char *headerKeys[] = { "Date" };
  // http.collectHeaders( headerKeys, 1 );
  // int httpCode = http.GET();
  // if (httpCode > 0) 
  // {
  //   Serial.printf( "[HTTP] Code: %d, Headers: %d\n", httpCode, http.headers() );
  //   for (int i = 0; i < http.headers(); i++)
  //   {
  //     Serial.printf( "%s: %s", http.headerName(i), http.header(i) );
  //   }
  //   if (httpCode == HTTP_CODE_OK || httpCode == HTTP_CODE_MOVED_PERMANENTLY) 
  //   {
  //     String payload = http.getString();
  //     Serial.println( payload );
  //   }
  // } 
  // else 
  // {
  //   Serial.printf ("[HTTP] GET... failed, error: %s\n", http.errorToString(httpCode).c_str() );
  // }
  // http.end();

  delay(5000);
}