import com.google.gson.JsonElement;
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;

public class FundsList {
    public static void main(String[] args) throws Exception {
        // Read the list of covered funds (one GET, no key), naming your own
        // project
        var request = HttpRequest.newBuilder(
                URI.create("https://tickerinside.com/api/v1/funds.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());
        }
        JsonObject doc = JsonParser.parseString(response.body())
            .getAsJsonObject();

        // funds: read from their issuers' own files, with the date of the data
        System.out.println(doc.get("count") + " funds from issuer files, as_of "
            + doc.get("as_of").getAsString());
        // sec_funds: more US stock ETFs, from SEC filings, t and n as in funds
        System.out.println(doc.get("sec_count")
            + " more from SEC filings, listed in sec_funds");

        // One entry per fund: t is the ticker, n the name
        for (JsonElement e : doc.getAsJsonArray("funds")) {
            JsonObject f = e.getAsJsonObject();
            System.out.println(f.get("t").getAsString() + " "
                + f.get("n").getAsString());
        }
    }
}