using System;
using System.Globalization;
using System.Net.Http;
using System.Text.Json;

// Print numbers with a dot, whatever the language of the machine
CultureInfo.CurrentCulture = CultureInfo.InvariantCulture;

// Read NVDA's file (one GET, no key), naming your own project
using var http = new HttpClient();
http.DefaultRequestHeaders.UserAgent.ParseAdd(
    "MyProject/1.0 (+https://example.com)");
using var doc = JsonDocument.Parse(await http.GetStringAsync(
    "https://tickerinside.com/api/v1/sec/nvda.json"));
// The etf_ownership block holds the figure
var own = doc.RootElement.GetProperty("etf_ownership");

// pct_lower_bound is null when no figure is published, and refused says why
var pct = own.GetProperty("pct_lower_bound");
if (pct.ValueKind == JsonValueKind.Null)
{
    Console.WriteLine("NVDA etf_ownership: no figure published, refused "
        + own.GetProperty("refused").GetString());
    return;
}
Console.WriteLine($"NVDA etf_ownership: at least {pct.GetDouble()}% of its "
    + "shares held by covered US ETFs, basis "
    + own.GetProperty("basis").GetString());
// The shares counted, and the date of the count of shares outstanding
// N0 puts a comma every three digits
var held = own.GetProperty("shares_held").GetInt64();
var outstanding = own.GetProperty("shares_outstanding").GetInt64();
Console.WriteLine($"shares_held {held:N0} shares_outstanding {outstanding:N0} "
    + $"as of {own.GetProperty("shares_outstanding_as_of").GetString()}");
// The oldest and the newest holdings file behind the figure
var dates = own.GetProperty("holdings_dates");
Console.WriteLine($"holdings dated {dates.GetProperty("oldest").GetString()} "
    + $"to {dates.GetProperty("newest").GetString()}");
// The line to print under the figure
Console.WriteLine(own.GetProperty("cite_as").GetString());