using System.Diagnostics;
using System.Runtime.CompilerServices;
using AyCode.Core.Serializers.Binaries;
using AyCode.Core.Tests.TestModels;
using MessagePack;
using MessagePack.Resolvers;

namespace AyCode.Core.Serializers.Console;

/// <summary>
/// Console application for Performance Diagnostics profiling.
/// Run with: Debug > Performance Profiler in Visual Studio
/// 
/// Usage:
///   dotnet run -- serialize      # Profile serialize only
///   dotnet run -- deserialize    # Profile deserialize only
///   dotnet run -- all            # Profile both (default)
/// </summary>
public static class Program
{
    private const int WarmupIterations = 50;
    private const int TestIterations = 5000;

    // Keep references to prevent GC during profiling
    private static TestOrder s_testOrder = null!;
    private static byte[] s_acBinaryData = null!;
    private static byte[] s_acBinaryNoRefData = null!;
    private static byte[] s_msgPackData = null!;
    private static AcBinarySerializerOptions s_acBinaryOptions = null!;
    private static AcBinarySerializerOptions s_acBinaryNoRefOptions = null!;
    private static MessagePackSerializerOptions s_msgPackOptions = null!;

    public static void Main(string[] args)
    {
        var mode = args.Length > 0 ? args[0].ToLower() : "all";
        
        System.Console.WriteLine("=".PadRight(60, '='));
        System.Console.WriteLine($"AcBinary Performance Profiler - Mode: {mode}");
        System.Console.WriteLine("=".PadRight(60, '='));

        Setup();
        Warmup();

        System.Console.WriteLine($"\nRunning {TestIterations} iterations...\n");

        var sw = Stopwatch.StartNew();

        switch (mode)
        {
            case "serialize":
            case "ser":
                RunSerializeTests();
                break;
            case "deserialize":
            case "des":
                RunDeserializeTests();
                break;
            default:
                RunSerializeTests();
                RunDeserializeTests();
                break;
        }

        sw.Stop();
        System.Console.WriteLine($"\nTotal time: {sw.ElapsedMilliseconds:N0} ms");
        System.Console.WriteLine("=".PadRight(60, '='));
    }

    private static void Setup()
    {
        System.Console.WriteLine("Creating test data...");
        TestDataFactory.ResetIdCounter();
        var sharedTag = TestDataFactory.CreateTag("SharedTag");
        var sharedUser = TestDataFactory.CreateUser("shareduser");
        var sharedMeta = TestDataFactory.CreateMetadata("shared", withChild: true);

        s_testOrder = TestDataFactory.CreateOrder(
            itemCount: 3,
            palletsPerItem: 3,
            measurementsPerPallet: 3,
            pointsPerMeasurement: 4,
            sharedTag: sharedTag,
            sharedUser: sharedUser,
            sharedMetadata: sharedMeta);

        s_acBinaryOptions = AcBinarySerializerOptions.Default;
        s_acBinaryNoRefOptions = AcBinarySerializerOptions.WithoutReferenceHandling();
        s_msgPackOptions = ContractlessStandardResolver.Options.WithCompression(MessagePackCompression.None);

        s_acBinaryData = AcBinarySerializer.Serialize(s_testOrder, s_acBinaryOptions);
        s_acBinaryNoRefData = AcBinarySerializer.Serialize(s_testOrder, s_acBinaryNoRefOptions);
        s_msgPackData = MessagePackSerializer.Serialize(s_testOrder, s_msgPackOptions);

        System.Console.WriteLine($"  AcBinary (WithRef): {s_acBinaryData.Length:N0} bytes");
        System.Console.WriteLine($"  AcBinary (NoRef):   {s_acBinaryNoRefData.Length:N0} bytes");
        System.Console.WriteLine($"  MessagePack:        {s_msgPackData.Length:N0} bytes");
    }

    private static void Warmup()
    {
        System.Console.WriteLine($"Warming up ({WarmupIterations} iterations)...");
        for (int i = 0; i < WarmupIterations; i++)
        {
            DoSerializeAcBinary();
            DoSerializeAcBinaryNoRef();
            DoSerializeMsgPack();
            DoDeserializeAcBinary();
            DoDeserializeAcBinaryNoRef();
            DoDeserializeMsgPack();
        }
    }

    private static void RunSerializeTests()
    {
        System.Console.WriteLine("--- SERIALIZE ---");

        var sw = Stopwatch.StartNew();
        for (int i = 0; i < TestIterations; i++)
        {
            DoSerializeAcBinary();
        }
        sw.Stop();
        System.Console.WriteLine($"  AcBinary (WithRef): {sw.ElapsedMilliseconds,6:N0} ms");

        sw.Restart();
        for (int i = 0; i < TestIterations; i++)
        {
            DoSerializeAcBinaryNoRef();
        }
        sw.Stop();
        System.Console.WriteLine($"  AcBinary (NoRef):   {sw.ElapsedMilliseconds,6:N0} ms");

        sw.Restart();
        for (int i = 0; i < TestIterations; i++)
        {
            DoSerializeMsgPack();
        }
        sw.Stop();
        System.Console.WriteLine($"  MessagePack:        {sw.ElapsedMilliseconds,6:N0} ms");
    }

    private static void RunDeserializeTests()
    {
        System.Console.WriteLine("--- DESERIALIZE ---");

        var sw = Stopwatch.StartNew();
        for (int i = 0; i < TestIterations; i++)
        {
            DoDeserializeAcBinary();
        }
        sw.Stop();
        System.Console.WriteLine($"  AcBinary (WithRef): {sw.ElapsedMilliseconds,6:N0} ms");

        sw.Restart();
        for (int i = 0; i < TestIterations; i++)
        {
            DoDeserializeAcBinaryNoRef();
        }
        sw.Stop();
        System.Console.WriteLine($"  AcBinary (NoRef):   {sw.ElapsedMilliseconds,6:N0} ms");

        sw.Restart();
        for (int i = 0; i < TestIterations; i++)
        {
            DoDeserializeMsgPack();
        }
        sw.Stop();
        System.Console.WriteLine($"  MessagePack:        {sw.ElapsedMilliseconds,6:N0} ms");
    }

    // Separate methods for better profiler visibility - NO INLINING
    [MethodImpl(MethodImplOptions.NoInlining)]
    private static byte[] DoSerializeAcBinary()
        => AcBinarySerializer.Serialize(s_testOrder, s_acBinaryOptions);

    [MethodImpl(MethodImplOptions.NoInlining)]
    private static byte[] DoSerializeAcBinaryNoRef()
        => AcBinarySerializer.Serialize(s_testOrder, s_acBinaryNoRefOptions);

    [MethodImpl(MethodImplOptions.NoInlining)]
    private static byte[] DoSerializeMsgPack()
        => MessagePackSerializer.Serialize(s_testOrder, s_msgPackOptions);

    [MethodImpl(MethodImplOptions.NoInlining)]
    private static TestOrder? DoDeserializeAcBinary()
        => AcBinaryDeserializer.Deserialize<TestOrder>(s_acBinaryData);

    [MethodImpl(MethodImplOptions.NoInlining)]
    private static TestOrder? DoDeserializeAcBinaryNoRef()
        => AcBinaryDeserializer.Deserialize<TestOrder>(s_acBinaryNoRefData);

    [MethodImpl(MethodImplOptions.NoInlining)]
    private static TestOrder? DoDeserializeMsgPack()
        => MessagePackSerializer.Deserialize<TestOrder>(s_msgPackData, s_msgPackOptions);
}