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

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

// Read VOO'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/fund/voo.json"));
var fund = doc.RootElement;

// The date of the issuer's file the weights come from
Console.WriteLine(
    $"VOO holdings_as_of {fund.GetProperty("holdings_as_of").GetString()}");

// holdings maps each ticker to its weight in percent: sort it, largest first
var rows = fund.GetProperty("holdings").EnumerateObject()
    .OrderByDescending(h => h.Value.GetDouble()).ToList();
Console.WriteLine($"{rows.Count} holdings, largest first");
foreach (var h in rows) Console.WriteLine($"{h.Name} {h.Value.GetDouble()}");

// The line to print under any figure you quote
Console.WriteLine(fund.GetProperty("cite_as").GetString());