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

const char* ssid = "Wokwi-GUEST";
const char* password = "";
String payload;
const char* server = "http://api.thingspeak.com/update?";
String myApiKey = "IYFGH0KKSF1QM4B6";
int A = 18;
int B = 33;

void setup() {
  Serial.begin(115200);
  Serial.println();
  Serial.println("Starting...");

  WiFi.begin(ssid, password);

  Serial.print("Connecting to WiFi");
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println(" Connection done");
}

void loop() {
  Serial.print("Valeurs envoyées: ");
  Serial.print(", A= ");
  Serial.print(A);
  Serial.print(", B= ");
  Serial.println(B);

  WiFiClient client;
  HTTPClient http;

  if (http.begin(client, server)) {
    http.addHeader("Content-Type", "application/json");

    String httpResponseData = "{\"api_key\":\"" + myApiKey + "\",\"field1\":\"" + String(A) + "\",\"field2\":\"" + String(B) + "\"}";
    Serial.printf("Le fichier est: %s\n", httpResponseData.c_str());
    int httpResponseCode = http.POST(httpResponseData);

    if (httpResponseCode > 0) {
      Serial.printf("[HTTP] POST... code: %d\n", httpResponseCode);

      if (httpResponseCode == HTTP_CODE_OK || httpResponseCode == HTTP_CODE_MOVED_PERMANENTLY) {
        String payload = http.getString();
        Serial.println(payload);
      } else {
        Serial.printf("[HTTP] POST... failed, error: %s\n", http.errorToString(httpResponseCode).c_str());
      }
    } else {
      Serial.printf("[HTTP] Unable to connect\n");
    }

    http.end();
  } else {
    Serial.println("[HTTP] Unable to begin connection to server");
  }

  delay(2000);
}