import com.google.gson.JsonObject;
import com.google.gson.JsonParser;
import java.net.URI;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;
import java.util.Locale;

public class EtfOwnership {
    public static void main(String[] args) throws Exception {
        // Read NVDA's file (one GET, no key), naming your own project
        var request = HttpRequest.newBuilder(
                URI.create("https://tickerinside.com/api/v1/sec/nvda.json"))
            .header("User-Agent", "MyProject/1.0 (+https://example.com)")
            .build();
        var response = HttpClient.newHttpClient()
            .send(request, HttpResponse.BodyHandlers.ofString());
        if (response.statusCode() != 200) {
            throw new RuntimeException("HTTP " + response.statusCode());
        }
        // The etf_ownership block holds the figure
        JsonObject own = JsonParser.parseString(response.body())
            .getAsJsonObject().getAsJsonObject("etf_ownership");

        // pct_lower_bound is null when no figure is published, and refused
        // says why
        if (own.get("pct_lower_bound").isJsonNull()) {
            System.out.println("NVDA etf_ownership: no figure published, "
                + "refused " + own.get("refused").getAsString());
            return;
        }
        System.out.println("NVDA etf_ownership: at least "
            + own.get("pct_lower_bound") + "% of its shares held by covered"
            + " US ETFs, basis " + own.get("basis").getAsString());
        // The shares counted, and the date of the count of shares outstanding
        // %,d puts a comma every three digits
        System.out.println(String.format(Locale.US,
            "shares_held %,d shares_outstanding %,d as of %s",
            own.get("shares_held").getAsLong(),
            own.get("shares_outstanding").getAsLong(),
            own.get("shares_outstanding_as_of").getAsString()));
        // The oldest and the newest holdings file behind the figure
        JsonObject dates = own.getAsJsonObject("holdings_dates");
        System.out.println("holdings dated "
            + dates.get("oldest").getAsString() + " to "
            + dates.get("newest").getAsString());
        // The line to print under the figure
        System.out.println(own.get("cite_as").getAsString());
    }
}