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

const char * ssid = "Wokwi-GUEST";
const char * password = "";
const char* host = "https://hladinomer.eu/data.php"; // Full URL for HTTPClient

#define pinTrigger    22
#define pinEcho       23
#define uS_TO_S_FACTOR 1000000
#define TIME_TO_SLEEP  300

RTC_DATA_ATTR unsigned long BootCount;
NewPing sonar(pinTrigger, pinEcho);

// Root CA cert - ISRG Root X1
const static char* test_root_ca PROGMEM = \
"-----BEGIN CERTIFICATE-----\n" \
"MIIFazCCA1OgAwIBAgIRAIIQz7DSQONZRGPgu2OCiwAwDQYJKoZIhvcNAQELBQAw\n" \
"TzELMAkGA1UEBhMCVVMxKTAnBgNVBAoTIEludGVybmV0IFNlY3VyaXR5IFJlc2Vh\n" \
"cmNoIEdyb3VwMRUwEwYDVQQDEwxJU1JHIFJvb3QgWDEwHhcNMTUwNjA0MTEwNDM4\n" \
"WhcNMzUwNjA0MTEwNDM4WjBPMQswCQYDVQQGEwJVUzEpMCcGA1UEChMgSW50ZXJu\n" \
"ZXQgU2VjdXJpdHkgUmVzZWFyY2ggR3JvdXAxFTATBgNVBAMTDElTUkcgUm9vdCBY\n" \
"MTCCAiIwDQYJKoZIhvcNAQEBBQADggIPADCCAgoCggIBAK3oJHP0FDfzm54rVygc\n" \
"h77ct984kIxuPOZXoHj3dcKi/vVqbvYATyjb3miGbESTtrFj/RQSa78f0uoxmyF+\n" \
"0TM8ukj13Xnfs7j/EvEhmkvBioZxaUpmZmyPfjxwv60pIgbz5MDmgK7iS4+3mX6U\n" \
"A5/TR5d8mUgjU+g4rk8Kb4Mu0UlXjIB0ttov0DiNewNwIRt18jA8+o+u3dpjq+sW\n" \
"T8KOEUt+zwvo/7V3LvSye0rgTBIlDHCNAymg4VMk7BPZ7hm/ELNKjD+Jo2FR3qyH\n" \
"B5T0Y3HsLuJvW5iB4YlcNHlsdu87kGJ55tukmi8mxdAQ4Q7e2RCOFvu396j3x+UC\n" \
"B5iPNgiV5+I3lg02dZ77DnKxHZu8A/lJBdiB3QW0KtZB6awBdpUKD9jf1b0SHzUv\n" \
"KBds0pjBqAlkd25HN7rOrFleaJ1/ctaJxQZBKT5ZPt0m9STJEadao0xAH0ahmbWn\n" \
"OlFuhjuefXKnEgV4We0+UXgVCwOPjdAvBbI+e0ocS3MFEvzG6uBQE3xDk3SzynTn\n" \
"jh8BCNAw1FtxNrQHusEwMFxIt4I7mKZ9YIqioymCzLq9gwQbooMDQaHWBfEbwrbw\n" \
"qHyGO0aoSCqI3Haadr8faqU9GY/rOPNk3sgrDQoo//fb4hVC1CLQJ13hef4Y53CI\n" \
"rU7m2Ys6xt0nUW7/vGT1M0NPAgMBAAGjQjBAMA4GA1UdDwEB/wQEAwIBBjAPBgNV\n" \
"HRMBAf8EBTADAQH/MB0GA1UdDgQWBBR5tFnme7bl5AFzgAiIyBpY9umbbjANBgkq\n" \
"hkiG9w0BAQsFAAOCAgEAVR9YqbyyqFDQDLHYGmkgJykIrGF1XIpu+ILlaS/V9lZL\n" \
"ubhzEFnTIZd+50xx+7LSYK05qAvqFyFWhfFQDlnrzuBZ6brJFe+GnY+EgPbk6ZGQ\n" \
"3BebYhtF8GaV0nxvwuo77x/Py9auJ/GpsMiu/X1+mvoiBOv/2X/qkSsisRcOj/KK\n" \
"NFtY2PwByVS5uCbMiogziUwthDyC3+6WVwW6LLv3xLfHTjuCvjHIInNzktHCgKQ5\n" \
"ORAzI4JMPJ+GslWYHb4phowim57iaztXOoJwTdwJx4nLCgdNbOhdjsnvzqvHu7Ur\n" \
"TkXWStAmzOVyyghqpZXjFaH3pO3JLF+l+/+sKAIuvtd7u+Nxe5AW0wdeRlN8NwdC\n" \
"jNPElpzVmbUq4JUagEiuTDkHzsxHpFKVK7q4+63SM1N95R1NbdWhscdCb+ZAJzVc\n" \
"oyi3B43njTOQ5yOf+1CceWxG1bQVs5ZufpsMljq4Ui0/1lvh+wjChP4kqKOJ2qxq\n" \
"4RgqsahDYVvTH9w7jXbyLeiNdd8XM2w9U/t7y0Ff/9yi0GE44Za4rF2LN9d11TPA\n" \
"mRGunUHBcnWEvgJBQl9nJEiU0Zsnvgc/ubhPgXRR4Xq37Z0j4r7g1SgEEzwxA57d\n" \
"emyPxgcYxn/eR44/KJ4EBs+lVDR3veyJm+kXQ99b21/+jh5Xos1AnX5iItreGCc=\n" \
"-----END CERTIFICATE-----\n";

void setup() {
  Serial.begin(115200);  
  Serial.println("=== ESP32 System Info ===");
  // Arduino Core version
  Serial.printf("Arduino Core version: %d.%d.%d\n",
                ESP_ARDUINO_VERSION_MAJOR,
                ESP_ARDUINO_VERSION_MINOR,
                ESP_ARDUINO_VERSION_PATCH);

  // ESP-IDF (SDK) version
  Serial.print("ESP-IDF version: ");
  Serial.println(esp_get_idf_version());
  Serial.println("Set distance via HC-SR04 sensor, you have 5 seconds");
  delay(5000);
  
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(F("."));
  }
  Serial.println(F("\nWiFi Connected"));

  // 1. Measure Distance
  int vzdialenost = 0;
  int validSamples = 0;
  
  for (int i = 0; i < 10; i++) {
    int reading = sonar.ping_cm();
    if (reading > 0) {
      vzdialenost += reading;
      validSamples++;
    }
    delay(50);
  }

  if (validSamples > 0) {
    vzdialenost = vzdialenost / validSamples;
    Serial.printf("Average Distance: %d cm\n", vzdialenost);

    // 2. Prepare HTTPS Request
    WiFiClientSecure *client = new WiFiClientSecure;
    if(client) {
      client->setCACert(test_root_ca);
      // Optional: if memory is still tight, uncomment the next line:
      // client->setBufferSizes(1024, 1024);

      HTTPClient https;
      Serial.println(F("[HTTPS] Connecting..."));

      if (https.begin(*client, host)) {
        https.addHeader("Content-Type", "application/x-www-form-urlencoded");
        
        String httpRequestData = "hodnota=" + String(vzdialenost) + "&token=123456789";
        
        int httpResponseCode = https.POST(httpRequestData);

        if (httpResponseCode > 0) {
          Serial.printf("[HTTPS] Response code: %d\n", httpResponseCode);
          // String payload = https.getString(); // Uncomment if you need to see server response
        } else {
          Serial.printf("[HTTPS] POST failed, error: %s\n", https.errorToString(httpResponseCode).c_str());
        }
        https.end();
      } else {
        Serial.println(F("[HTTPS] Unable to connect"));
      }
      delete client; // Free memory
    }
  } else {
    Serial.println(F("Error: Sensor out of range or no reading."));
  }

  // 3. Go to Sleep
  BootCount++;
  esp_sleep_enable_timer_wakeup(TIME_TO_SLEEP * uS_TO_S_FACTOR);
  Serial.println(F("Entering Deep Sleep..."));
  esp_deep_sleep_start();
}

void loop() {}