using System;
using System.Collections.Generic;

namespace ShrinkModFramework
{
    public sealed class ShrinkExternalAssemblyRevisionDiagnostic
    {
        internal ShrinkExternalAssemblyRevisionDiagnostic(string path, string revision, string assemblyName,
            long loadedBytes, bool isCurrent)
        {
            Path = path;
            Revision = revision;
            AssemblyName = assemblyName;
            LoadedBytes = loadedBytes;
            IsCurrent = isCurrent;
        }

        public string Path { get; }
        public string Revision { get; }
        public string AssemblyName { get; }
        public long LoadedBytes { get; }
        public bool IsCurrent { get; }
    }

    /// <summary>Mono 外部程序集的 current 与常驻历史快照；LoadedBytes 仅统计载入 DLL/PDB 文件大小。</summary>
    public sealed class ShrinkExternalAssemblyDiagnostic
    {
        internal ShrinkExternalAssemblyDiagnostic(int currentRevisionCount,
            IReadOnlyList<ShrinkExternalAssemblyRevisionDiagnostic> residentRevisions,
            long estimatedResidentBytes, int softLimit)
        {
            CurrentRevisionCount = currentRevisionCount;
            ResidentRevisions = residentRevisions;
            EstimatedResidentBytes = estimatedResidentBytes;
            SoftLimit = softLimit;
        }

        public int CurrentRevisionCount { get; }
        public IReadOnlyList<ShrinkExternalAssemblyRevisionDiagnostic> ResidentRevisions { get; }
        public int ResidentRevisionCount => ResidentRevisions.Count;
        public long EstimatedResidentBytes { get; }
        public int SoftLimit { get; }
        public bool IsSoftLimitExceeded => ResidentRevisionCount >= SoftLimit;
    }

    public static class ShrinkModDiagnostics
    {
        public static ShrinkExternalAssemblyDiagnostic CaptureExternalAssemblies(
            ShrinkModFrameworkSettings settings = null)
        {
            if (settings == null)
                settings = ShrinkModFrameworkSettings.Instance;
            return ShrinkExternalModAssemblyLoader.CaptureDiagnostic(
                settings != null ? settings.externalAssemblyRevisionSoftLimit : 16);
        }
    }
}