//-----------------------------------------------------------------------
// -----------------------------------------------------------------------
// file="hlsf-test"
// Project: StgSharp
// AuthorGroup: Nitload
// Copyright (c) Nitload. All rights reserved.
//     
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
//     
// -----------------------------------------------------------------------
// -----------------------------------------------------------------------
using StgSharp.HighPerformance.Memory;
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace StgSharp
{
    internal partial class Program
    {

        public static void TestHlsf()
        {
            unchecked
            {
                nuint size = (nuint)(4UL * 1024UL * 1024UL * 1024UL);

                // HLSF test arena
                Console.WriteLine(
                        "=== HLSF (Hybrid Layer Segregated Fit Allocator) Single-threaded Stress Test ===\n");
                HybridLayerSegregatedFitAllocator hlsfAllocator = new(size);

                // === 简洁交替测试：100次alloc与100次free交替进行，直到触发异常或达到最大循环 ===
                Console.WriteLine("\n=== 简洁交替测试：100次alloc + 100次free 交替 ===");

                int maxRounds = 10000; // 可调整
                int maxCount = 10000;
                uint[] sizes = [
                    64u,
                    128u,
                    256u,
                    512u,
                    1024u,
                    4096u,
                    16384u,
                    65536u,
                    262144u,
                    1048576u
                ];
                int[] offset = [
                    -4,
                    -3,
                    -2,
                    -1,
                    0,
                    1,
                    2,
                    3,
                    4
                ];
                Random rnd = new Random(42);
                for (int round = 1; round <= maxRounds; round++)
                {
                    List<HlsfHandle> batch = new(maxCount);
                    for (int i = 0; i < maxCount; i++)
                    {
                        uint sz = sizes[rnd.Next(sizes.Length)];
                        batch.Add(hlsfAllocator.Alloc(sz));

                        // Console.WriteLine($"alloced:{i}");
                    }
                    for (int i = 5; i < maxCount; i += 10)
                    {
                        HlsfHandle origin = batch[i];
                        int index = i + offset[rnd.Next(offset.Length)];
                        batch[i] = batch[index];
                        batch[index] = origin;
                    }
                    for (int i = batch.Count - 1; i >= 0; i--)
                    {
                        hlsfAllocator.Free(batch[i]);

                        // Console.WriteLine($"freed:{i}");
                    }
                    if (round % 100 == 0)
                    {
                        Console.WriteLine($"[交替测试] 已完成 {round} 轮 {maxCount}alloc+{maxCount}free");
                        hlsfAllocator.DumpPositionChain(false, 10);
                        hlsfAllocator.Collect();
                        hlsfAllocator.DumpPositionChain(false, 10);
                    }
                }
                Console.WriteLine("[交替测试] 正常结束，无异常触发");
            }
        }

    }
}