using Microsoft.ClearScript.V8;
using Newtonsoft.Json;

foreach (var disableNarrowing in new[] { true, false })
{
    using var engine = new V8ScriptEngine(V8ScriptEngineFlags.EnableDateTimeConversion)
    {
        DisableFloatNarrowing = disableNarrowing
    };
    engine.AddHostObject("host", new ProbeHost());
    engine.AddHostType(typeof(JsonConvert));
    void Show(string name, string code) => Console.WriteLine(name + ": " + engine.Evaluate(code));

    Console.WriteLine("DisableFloatNarrowing=" + disableNarrowing);
    Show("numbers", "JSON.stringify([host.Kind(1), host.Kind(1.25), host.Kind(1.23456789)])");
    Show("array", "JSON.stringify([Array.isArray(host.Values), host.Values.Length, typeof host.Values.map, Array.from(host.Values).join(',')])");
    Show("list", "JSON.stringify([Array.isArray(host.List), host.List.Count, Array.from(host.List).join(',')])");
    Show("date", "JSON.stringify([host.UtcDate instanceof Date, host.UtcDate.toISOString(), host.DateKind(new Date('2026-10-12T00:00:00Z'))])");
    Show("Int64", "JSON.stringify([typeof host.Big, host.Big === 9007199254740992, typeof 1n])");
    Show("decimal", "JSON.stringify([typeof host.Amount, host.Amount + 0.2])");
    Show("JSON.stringify", "JSON.stringify(host)");
    Show("JsonConvert", "JsonConvert.SerializeObject(host)");
    Show("globals", "JSON.stringify([typeof window, typeof document, typeof fetch, typeof setTimeout, typeof require, typeof Promise])");
    Show("case", "JSON.stringify([typeof host.Kind, typeof host.kind])");
    Show("task", "JSON.stringify([host.TaskValue instanceof Promise, typeof host.TaskValue.then])");
    Show("exception", "(()=>{try{host.Fail(); return false;}catch(e){return !!e.hostException;}})()");
    Show("null", "JSON.stringify([host.Nothing === null, typeof host.Unknown])");
}

public class ProbeHost
{
    public int[] Values => new[] { 10, 20 };
    public List<int> List => new() { 10, 20 };
    public DateTime UtcDate => new(2026, 10, 12, 0, 0, 0, DateTimeKind.Utc);
    public long Big => 9007199254740993L;
    public decimal Amount => 0.1M;
    public object Nothing => null;
    public Task<int> TaskValue => Task.FromResult(42);
    public string Kind(object value) => value.GetType().Name;
    public string DateKind(DateTime value) => value.Kind.ToString();
    public void Fail() => throw new InvalidOperationException("probe");
}