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#include <ESP8266WiFi.h>
#include <WiFiClient.h>
#include <ESP8266WebServer.h>
#include <ESP8266mDNS.h>
#include <SoftwareSerial.h>

const char* ssid = "Net-Virtua-6271";
const char* password = "162562710";

WiFiServer server(80); //Shield irá receber as requisições das páginas (o padrão WEB é a porta 80)

bool led1 = false;

String HTTP_req;
String URLValue;

String getURLRequest(String *requisicao);
bool mainPageRequest(String *requisicao);

void setup()
{
  Serial.begin(115200);
  pinMode(4, OUTPUT); //LED

  //Conexão na rede WiFi
  Serial.println();
  Serial.print("Conectando a ");
  Serial.println(ssid);

  WiFi.begin(ssid, password);

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

  // Inicia o servidor WEB
  server.begin();
  Serial.println("Server iniciado");

  // Mostra o endereco IP
  Serial.println(WiFi.localIP());
}

void loop()
{
  // INÍCIO DO SERVIÇO DE SERVIDOR
  WiFiClient  client = server.available();

  if (Serial.available() > 0)
  {
    char data = Serial.read();
    if (data == '1')
    {
      digitalWrite(4, HIGH);
      led1 = true;
    }
    if (data == '0')
    {
      digitalWrite(4, LOW);
      led1 = false;
    }
  }

  if (client) {
    boolean currentLineIsBlank = true;
    while (client.connected()) {
      if (client.available()) {
        char c = client.read();
        HTTP_req += c;

        if (c == '\n' && currentLineIsBlank ) {

          if ( mainPageRequest(&HTTP_req) ) {
            URLValue = getURLRequest(&HTTP_req);
            Serial.println(HTTP_req);

            client.println("HTTP/1.1 200 OK");
            client.println("Content-Type: text/html");
            client.println("Connection: keep-alive");              //<------ ATENCAO
            client.println();


            //Conteudo da Página HTML

            client.println("<!DOCTYPE html>");
            client.println("<html>");
            client.println("<head>");
            client.println("<title>Smartcine</title>");
            client.println("</head>");
            client.println("<body>");                      //<------ALTERADO
            client.println("<br/>");

            client.println("<br/><br/>");

            client.println("<input type=\"text\" value=\"10\" id=\"countdown\" / > ");
            client.println("<input type=\"button\" value=\"Start\" onclick=\"startTimer(\'countdown\')\"/>");
            client.println("<input type=\"button\" value=\"Stop\" onclick=\"stopTimer(\'countdown\')\"/><br/>");
            client.println("<input type=\"checkbox\" name=\"smartcine\" value=\"led-01\"/>led-01<br/>");
            client.println("<input type=\"checkbox\" name=\"smartcine\" value=\"led-02\"/>led-02<br/>");
            client.println("<input type=\"checkbox\" name=\"smartcine\" value=\"led-03\"/>led-03<br/>");
            client.println("<script type=\"text/javascript\">");
            client.println("var intervalID;");
            client.println("function startTimer(Id){");
            client.println("var cbox = document.getElementsByName('smartcine');");
            client.println("var control = document.getElementById(Id);");
            client.println("var seconds = control.value;");
            client.println("seconds = seconds - 1;");
            if (led1) {
              client.println("cbox[0].checked = true;");
              client.println("cbox[1].checked = true;");
              client.println("cbox[2].checked = true;");
            }
            client.println("if(seconds == 0 && cbox[0].checked && cbox[1].checked && cbox[2].checked){");
            client.println("control.value = 'done';");
            client.println("document.write('<iframe width=\"420\" height=\"345\" src=\"https://www.youtube.com/embed/fJ9rUzIMcZQ?autoplay=1\"></iframe>');");
            client.println("return 1;");
            client.println("}");
            client.println("else");
            client.println("{");
            client.println("control.value = seconds;");
            client.println("}");
            client.println("if(seconds > 0 && (!cbox[0].checked || !cbox[1].checked || !cbox[2].checked)){");
            client.println("window.alert('erro, ligue os leds primeiro!');");
            client.println("control.value = 10;");
            client.println("return false;");
            client.println("}");
            client.println("intervalID = setTimeout(function(){startTimer(\"countdown\")}, 1000);");
            client.println("}");
            client.println("function stopTimer(){");
            client.println("clearTimeout(intervalID);");
            client.println("}");
            client.println("</script>");
            client.println("</body>");
            client.println("</html>");


            //FINAL DA PÁGINA HTML

          } else if (HTTP_req.indexOf("solicitacao_via_ajax") > -1) {     //<----- NOVO

            Serial.println(HTTP_req);

            client.println("HTTP/1.1 200 OK");
            client.println("Content-Type: text/html");
            client.println("Connection: keep-alive");
            client.println();

          } else {

            Serial.println(HTTP_req);
            client.println("HTTP/1.1 200 OK");
          }
          HTTP_req = "";
          break;
        }

        if (c == '\n') {
          currentLineIsBlank = true;
        }
        else if (c != '\r') {
          currentLineIsBlank = false;
        }
      }
    }
    delay(1);
    client.stop();
  }


}

String getURLRequest(String * requisicao) {
  int inicio, fim;
  String retorno;

  inicio = requisicao->indexOf("GET") + 3;
  fim = requisicao->indexOf("HTTP/") - 1;
  retorno = requisicao->substring(inicio, fim);
  retorno.trim();

  return retorno;
}

bool mainPageRequest(String * requisicao) {
  String valor;
  bool retorno = false;

  valor = getURLRequest(requisicao);
  valor.toLowerCase();

  if (valor == "/") {
    retorno = true;
  }

  if (valor.substring(0, 2) == "/?") {
    retorno = true;
  }

  if (valor.substring(0, 10) == "/index.htm") {
    retorno = true;
  }

  return retorno;
}