#include <WiFi.h>
#include <ESPAsyncWebServer.h>

#define TRIGGER_PIN       22
#define ECHO_PIN          23
#define LED_DIST_VERMELHO 2
#define LED_DIST_AMARELO  4
#define LED_DIST_VERDE    5
#define SENSOR_FOTO       32
#define LED_LUZ_VERDE     33
#define LED_LUZ_VERMELHO  25
#define BUZZER_PIN        26

bool leds_inicializados = false;
bool luz_acesa = false;


const char* ssid = "Wokwi-GUEST";
const char* password = "";

AsyncWebServer server(80);


const char* host = "api.thingspeak.com";
const char* APIkeyWrite = "P93YX6CUSRMLEJ6K";

void setup() {
  Serial.begin(9600);
  WiFi.begin(ssid, password);

  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("conectando ao Wi-Fi...");
  }
  Serial.println("conectado ao Wi-Fi...");


  
  pinMode(TRIGGER_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);
  pinMode(LED_DIST_VERMELHO, OUTPUT);
  pinMode(LED_DIST_AMARELO, OUTPUT);
  pinMode(LED_DIST_VERDE, OUTPUT);
  pinMode(SENSOR_FOTO, INPUT);
  pinMode(LED_LUZ_VERDE, OUTPUT);
  pinMode(LED_LUZ_VERMELHO, OUTPUT);
  pinMode(BUZZER_PIN, OUTPUT);

  delay(5000);
  Serial.println(WiFi.localIP());

  server.on("/sensor",
   HTTP_GET, []
   (AsyncWebServerRequest
   *request){

    int sensoru = analogRead(SENSOR_FOTO);
    String sensordata = String(sensoru);
    request->send(200, "text/plain", sensordata);
   });

   server.begin();

     server.on("/acionar-buzzer",
   HTTP_GET, []
   (AsyncWebServerRequest
   *request){

      digitalWrite(BUZZER_PIN, HIGH);
      delay(5000);
      digitalWrite(BUZZER_PIN, LOW);
    request->send(200, "text/plain", "Buzzer ativado");
   });

   server.begin();
}

void loop() {
  float distancia = medirDistancia();
  float luz = medirLuz();


      
    if (distancia < 10) {
      digitalWrite(LED_DIST_VERMELHO, HIGH);
      digitalWrite(LED_DIST_AMARELO, LOW);
      digitalWrite(LED_DIST_VERDE, LOW);
    } else if (distancia >= 10 && distancia <= 20) {
      digitalWrite(LED_DIST_VERMELHO, LOW);
      digitalWrite(LED_DIST_AMARELO, HIGH);
      digitalWrite(LED_DIST_VERDE, LOW);
    } else if (distancia > 20 ) {
      digitalWrite(LED_DIST_VERMELHO, LOW);
      digitalWrite(LED_DIST_AMARELO, LOW);
      digitalWrite(LED_DIST_VERDE, HIGH);
    } 

    // Verifica a luz
    if (luz > 0) {
      digitalWrite(LED_LUZ_VERMELHO, HIGH); // presença de luz
      digitalWrite(LED_LUZ_VERDE, LOW);
      luz_acesa = true;
    } else {
      digitalWrite(LED_LUZ_VERMELHO, LOW); // sem luz
      digitalWrite(LED_LUZ_VERDE, HIGH);
      luz_acesa = false;
    }

    // Ativa o buzzer se o LED vermelho de distância estiver ativo
    if (digitalRead(LED_DIST_VERMELHO) == HIGH) {
      ativarBuzzer();
    }

    leds_inicializados = true; // Indica que os LEDs foram inicializados
  

    WiFiClient client;
  const int httpPort = 80;
  if (!client.connect(host, httpPort))
  {
  return;
  }

  String url = "/update?api_key=";
  url += APIkeyWrite;
  url += "&field1=";
  url += String(distancia);
  

  url += "\r\n";
  Serial.println(url);
  String endereco = String("GET ") + url + " HTTP/1.1\r\n" + "Host: " + host + "\r\n" + "Connection: close\r\n\r\n";
  Serial.println(endereco);
  client.print(endereco);
  delay(10000);
 

  delay(1000); // Delay de 1 segundo

  }

float medirDistancia() {
  digitalWrite(TRIGGER_PIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIGGER_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIGGER_PIN, LOW);
  float duration = pulseIn(ECHO_PIN, HIGH);
  float distance = 0.000001 * duration * 340.3 * 100 / 2;
  return distance;
}

float medirLuz() {
  return analogRead(SENSOR_FOTO);
}

void ativarBuzzer() {
  digitalWrite(BUZZER_PIN, HIGH);
  delay(1000);
  digitalWrite(BUZZER_PIN, LOW);
}