#include <ESP8266WiFi.h>

/************************* WiFi Access Point *********************************/

#define WLAN_SSID       "SSIDforESPTest"
#define WLAN_PASS       "PASSforESPTest"
#define LED             2

WiFiClient client;

/*************************** Sketch Code ************************************/

void setup() {
  Serial.begin(115200);
  Serial.println();
  Serial.println("Initializing outputs...");
  Serial.println("Starting Wifi connection...");
  WiFi.begin(WLAN_SSID, WLAN_PASS);
  int failcounter = 300;
  Serial.print("Waiting for a connection");
  while (WiFi.status() != WL_CONNECTED) {
    delay(100);
    Serial.print(".");
    if (failcounter <= 0) {
      Serial.println();
      Serial.println("Giving up.");
      shutdown();
    }
    failcounter--;
  }
  Serial.println();
  Serial.println("Wifi connected.");
  // connect to host
  // const char* host = "195.160.169.52";
  const char* host = "192.168.1.1";
  int port         = 8000;
  if (client.connect(host, port)) {
    Serial.print("Connection to ");
    Serial.print(host);
    Serial.println(" established.");
    // send GET request
    Serial.println("Sending a message to the server:");
    
    client.print(String("GET / HTTP/1.1\r\n") + "Host: " + host + "\r\nConnection: close\r\n\r\n");
    Serial.println(String("GET / HTTP/1.1\r\n") + "Host: " + host + "\r\nConnection: close\r\n\r\n");
    delay(500);
    // get response
    int success = 0;
    failcounter = 10000;
    while (client.connected()) {
      if (client.available()) {
        String line = client.readStringUntil('\n');
        Serial.println("Server response: " + line);
        /*
        if (line[0] == 'H' && line[1] == 'T' && line[2] == 'T' && line[3] == 'P' && line[4] == '/' && line[5] == '1' && line[6] == '.' && line[7] == '1' && line[8] == ' ' && line[9] == '2' && line[10] == '0' && line[11] == '0' && line[12] == ' ' && line[13] == 'O' && line[14] == 'K' ) {
          success = 1;
        }
        */
      }
      if (failcounter <= 0) {
        shutdown();
      }
      failcounter--;
    }

    // close connection
    Serial.println("Successfully closing the connection.");
    client.stop();
    shutdown();
  } else {
    Serial.print("Unable to connect to ");
    Serial.print(host);
    Serial.println(". Sorry.");
    shutdown();
  }
}

void loop() {
  // this should never be reached.
}


void shutdown() {
  Serial.println("Shutting down.");
  Serial.println("Going to sleep.");
  ESP.deepSleep(0);
  Serial.println("Sleep failed.");
  while(1) {
  }
}