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

const String url = "https://environment.data.gov.uk/flood-monitoring/id/measures/L1803-level-stage-i-15_min-m";

void setup() {
  Serial.begin(115200);

  Serial.print("Connecting to WiFi");
  WiFi.begin("Wokwi-GUEST", "", 6);
  while (WiFi.status() != WL_CONNECTED) {
    delay(100);
    Serial.print(".");
  }
  Serial.println(" Connected!");

  Serial.print("IP=");
  Serial.println(WiFi.localIP());
  Serial.print("Fetching " + url + "... ");
  Serial.println();

  HTTPClient http;
  
  http.setFollowRedirects(HTTPC_STRICT_FOLLOW_REDIRECTS);
  http.begin(url);

  int httpResponseCode = http.GET();
  if (httpResponseCode > 0) {
    Serial.print("HTTP httpResponseCode #");
    Serial.print(httpResponseCode);
    Serial.println("#");
    String payload = http.getString();
    Serial.print("payload #");
    Serial.print(payload);
    Serial.println("#");

    JsonDocument doc;
    DeserializationError error = deserializeJson(doc, payload);

    if (error) {
      Serial.print("deserializeJson() failed: ");
      Serial.println(error.c_str());
      return;
    }
    
    JsonObject item = doc["items"];
    const char* label = item["label"];                  // "Chapel Haddlesey - level-stage-i-15_min-m"

    JsonObject latestReading = item["latestReading"];
    const char* dateTime = latestReading["dateTime"];   // "2025-04-05T07:45:00Z"
    float levelValue = latestReading["value"];          // -0.005
    Serial.printf("Station; %s\nLatest reading (%s): %2.3f meters\n", label, dateTime, levelValue);
  }
  else {
    Serial.print("Error code: ");
    Serial.println(httpResponseCode);
    Serial.println(":-(");
  }
}

void loop() {
  delay(100);
}