// Generated from executable documentation examples. Edit the source region, then regenerate.
using System;
using System.IO;
using System.IO.Pipelines;
using System.Linq;
using System.Buffers;
using System.Collections.Generic;
using System.Dynamic;
using System.Globalization;
using System.Numerics;
using System.Runtime.CompilerServices;
using System.Threading;
using System.Threading.Tasks;
using CStructSharp;
using CStructSharp.Codecs;
using CStructSharp.Diagnostics;
using CStructSharp.Introspection;
using CStructSharp.Values;

internal static partial class Program
{
    public static void Main()
    {
        GeneratedFirstLayout();
        Console.WriteLine("PASS generated-first-layout");
    }

    private static void GeneratedFirstLayout()
    {
        byte[] bytes = [0x02, 0x00, 0x06, 0x00, 0x00, 0x00];

        // Parse returns the generated class; its properties have the C# types the layout implies.
        Wire.Header header = Wire.Parse(bytes);
        Equal((ushort)2, header.Kind);
        Equal(6u, header.Length);

        // Serialize takes the class back to bytes, and the runtime layout is still there for anything else.
        SequenceEqual(bytes, Wire.Serialize(header));
        Equal("header", Wire.RootName);
        Equal(6, Wire.Layout.GetStructSizeInBytes("header"));
        Equal(6, Wire.Sizes.Header);
    }

    private static void Equal<T>(T expected, T actual)
    {
        if (!EqualityComparer<T>.Default.Equals(expected, actual))
        {
            throw new InvalidOperationException($"Expected '{expected}', received '{actual}'.");
        }
    }

    private static void SequenceEqual(byte[] expected, byte[] actual)
    {
        if (!expected.AsSpan().SequenceEqual(actual))
        {
            throw new InvalidOperationException(
                $"Expected {Convert.ToHexString(expected)}, received {Convert.ToHexString(actual)}.");
        }
    }

    // The layout text lives in the attribute; the generator adds the members of this partial class at build time.
    [CStructLayout("struct header { uint16 kind; uint32 length; };")]
    public static partial class Wire
    {
    }
}