#include <WiFi.h>
#include <WiFiClient.h>
#include <WiFiClientSecure.h>
#include <HTTPClient.h>

// ---- WiFi (Wokwi) ----
const char* WIFI_SSID = "Wokwi-GUEST";
const char* WIFI_PASS = "";

// ---- URL a monitorar ----
String TARGET_URL = "https://www.icanadareparos.com.br/";

// ---- Pinos (seu diagrama) ----
const int PIN_LED    = 5;  // LED vermelho -> resistor -> GND
const int PIN_BUZZER = 3;  // Buzzer -> GND

// ---- Parâmetros ----
const unsigned long CHECK_INTERVAL_MS = 10000; // 10 s
const unsigned long TIMEOUT_MS        = 5000;  // 5 s
const unsigned long LATENCY_SLOW_MS   = 1500;  // 1,5 s

// ---- Struct precisa vir antes da função ----
struct SiteResult {
  bool ok;
  int  statusCode;
  long latencyMs;
};

// ---- “Beep” sem PWM (liga/desliga) ----
void beep(unsigned long msOn=160, unsigned long msOff=120, int times=1) {
  for (int i=0;i<times;i++){
    digitalWrite(PIN_BUZZER, HIGH);
    delay(msOn);
    digitalWrite(PIN_BUZZER, LOW);
    if (i<times-1) delay(msOff);
  }
}

// ---- Checagem HTTP/HTTPS ----
SiteResult checkSite(const String& url) {
  SiteResult r{false, -1, -1};
  bool https = url.startsWith("https://");

  WiFiClient *base = nullptr;
  WiFiClientSecure *tls = nullptr;

  if (https) {
    tls = new WiFiClientSecure();
    tls->setInsecure(); // ok para simulação
    base = tls;
  } else {
    base = new WiFiClient();
  }

  HTTPClient http;
  http.setTimeout(TIMEOUT_MS);
  http.setFollowRedirects(HTTPC_STRICT_FOLLOW_REDIRECTS);

  unsigned long t0 = millis();
  if (!http.begin(*base, url)) {
    if (tls) delete tls; else delete base;
    return r;
  }

  int code = http.GET();
  long elapsed = (long)(millis() - t0);

  r.statusCode = code;
  r.latencyMs  = elapsed;
  r.ok = (code > 0 && code < 500); // 2xx/3xx/4xx = respondeu; 5xx/erro = down

  http.end();
  if (tls) delete tls; else delete base;
  return r;
}

void ensureWiFi() {
  if (WiFi.status() == WL_CONNECTED) return;
  WiFi.mode(WIFI_STA);
  WiFi.begin(WIFI_SSID, WIFI_PASS);
  Serial.print("Conectando ao WiFi");
  while (WiFi.status() != WL_CONNECTED) { delay(300); Serial.print("."); }
  Serial.print("\nIP: "); Serial.println(WiFi.localIP());
}

void setup() {
  Serial.begin(115200);
  pinMode(PIN_LED, OUTPUT);
  pinMode(PIN_BUZZER, OUTPUT);
  digitalWrite(PIN_LED, LOW);
  digitalWrite(PIN_BUZZER, LOW);
  ensureWiFi();

  Serial.println("\n=== ESP32-C3 Monitor de Site ===");
  Serial.print("Alvo: "); Serial.println(TARGET_URL);
}

unsigned long lastCheck = 0;

void loop() {
  if (millis() - lastCheck >= CHECK_INTERVAL_MS) {
    lastCheck = millis();

    ensureWiFi();
    SiteResult r = checkSite(TARGET_URL);

    // log em JSON para o relatório
    Serial.print("{\"status\":"); Serial.print(r.statusCode);
    Serial.print(",\"latency_ms\":"); Serial.print(r.latencyMs);
    Serial.print(",\"ok\":"); Serial.print(r.ok ? "true" : "false");
    Serial.println("}");

    if (r.ok) {
      digitalWrite(PIN_LED, HIGH);   // OK: LED aceso
      digitalWrite(PIN_BUZZER, LOW); // buzzer off
      if (r.latencyMs >= (long)LATENCY_SLOW_MS) {
        // lento: 2 piscadas + 1 beep curto
        for (int i=0;i<2;i++){ digitalWrite(PIN_LED, LOW); delay(70); digitalWrite(PIN_LED, HIGH); delay(70); }
        beep(120, 0, 1);
      }
    } else {
      // down: 3 piscadas + 3 beeps
      for (int i=0;i<3;i++){ digitalWrite(PIN_LED, HIGH); delay(150); digitalWrite(PIN_LED, LOW); delay(150); }
      beep(180, 120, 3);
    }
  }
}