using Furion.EventBus;
using Myshipping.Core.Entity;
using Microsoft.Extensions.DependencyInjection;
using System;
using System.Threading.Tasks;
using System.IO;
using System.Collections.Generic;
using ICSharpCode.SharpZipLib.Zip;
using System.Linq;
using Furion;
using Furion.Logging;

namespace Myshipping.Core;

public class LogZipClearSubscriber : IEventSubscriber
{
    public LogZipClearSubscriber(IServiceProvider services)
    {
        Services = services;
    }

    public IServiceProvider Services { get; }

    [EventSubscribe("LogZipClear:DoWork")]
    public async Task DoWork(EventHandlerExecutingContext context)
    {
        var logBaseDir = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "logs");
        var subDirs = new string[] {
                Path.Combine(logBaseDir,"error"),
                Path.Combine(logBaseDir,"info"),
                Path.Combine(logBaseDir,"warn")
            };

        //留3天的不压缩处理
        var skipDate = new string[] {
            DateTime.Today.ToString("yyyyMMdd"),
            DateTime.Today.AddDays(-1).ToString("yyyyMMdd"),
            DateTime.Today.AddDays(-2).ToString("yyyyMMdd")
        };

        //压缩日志
        Log.Information($"准备压缩日志文件……");
        foreach (var dir in subDirs)
        {
            var files = new List<string>(Directory.GetFiles(dir, "*.log"));
            var fileDateList = files.GroupBy(x => Path.GetFileName(x).Substring(0, Path.GetFileName(x).IndexOf("_"))).Select(x => x.Key).Where(x => !skipDate.Contains(x)).ToList();

            foreach (var fd in fileDateList)
            {
                var zipFile = Path.Combine(dir, $"{fd}.zip");
                var listToZip = files.Where(x => Path.GetFileName(x).Substring(0, Path.GetFileName(x).IndexOf("_")) == fd).ToList();
                using (FileStream fs = new FileStream(zipFile, FileMode.Create, FileAccess.ReadWrite))
                {
                    using (ZipOutputStream zipOut = new ZipOutputStream(fs))
                    {
                        foreach (var f in listToZip)
                        {
                            var fn = Path.GetFileName(f);
                            var fileDate = fn.Substring(0, fn.IndexOf("_"));

                            ZipEntry zipEntry = new ZipEntry(fn);
                            zipOut.PutNextEntry(zipEntry);
                            await zipOut.WriteAsync(File.ReadAllBytes(f));
                            await zipOut.FlushAsync();

                            File.Delete(f);
                        }
                    }
                }

                Log.Information($"已将{fd}的日志压缩，共{listToZip.Count}个文件");
            }
        }

        //清理过期
        Log.Information($"准备清理过期日志文件……");
        var dtExpire = DateTime.Today.AddDays(-60);
        foreach (var dir in subDirs)
        {
            var files = new List<string>(Directory.GetFiles(dir, "*.zip"));
            foreach (var file in files)
            {
                var fileDate = DateTime.ParseExact(Path.GetFileNameWithoutExtension(file), "yyyyMMdd", System.Globalization.CultureInfo.InvariantCulture);
                if (fileDate < dtExpire)
                {
                    File.Delete(file);
                    Log.Information($"已删除过期日志文件：{Path.GetFileName(file)}");
                }
            }
        }
    }

}