using System;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.ComponentModel;
using System.Configuration;
using System.Data;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.ServiceProcess;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Timers;

namespace AipGateway.FileJob.Scheduler
{
    public partial class Service : ServiceBase
    {
        private const string settingDeleteMinMinute = "DeleteMinMinute";
        private const string settingDelete = "deleteSettings";

        private int DefaultDeleteMinute = 60 * 24;
        private string[] DeletePathsToWatchs = null;
        private int[] DeleteMinutes = null;

        private readonly ManualResetEvent stopEvent = null;
        private System.Timers.Timer deletePathTimer = null;


        public Service()
        {
            InitializeComponent();
            loadConfiguration();
        }
        private void loadConfiguration()
        {
            int deleteMinMinute = 30;
            NameValueCollection nvc  = (NameValueCollection)ConfigurationManager.AppSettings;
            if (nvc.AllKeys.Contains(settingDeleteMinMinute))
            {
                string tmpMinute = nvc[settingDeleteMinMinute];
                deleteMinMinute = Helper.TryInt(tmpMinute, deleteMinMinute);
                if (deleteMinMinute < 30)
                {
                    Console.WriteLine($"삭제할 파일 생성 시간 기준이 너무작아 [{deleteMinMinute}] 최소값인 {deleteMinMinute}분으로 다시 설정합니다.");
                    deleteMinMinute = 30;
                }
            }

            try
            {
                var deleteSettings = ConfigurationManager.GetSection(settingDelete) as NameValueCollection;
                if (deleteSettings.Count == 0)
                {
                    Console.WriteLine("등록되어 있는 작업 정보가 없습니다.");
                }
                else
                {
                    int jobCnt = 0;
                    string[] tmpDeletePathsToWatchs = new string[deleteSettings.Count];
                    int[] tmpDeleteMinutes = new int[deleteSettings.Count];
                    foreach (var key in deleteSettings.AllKeys)
                    {
                        tmpDeletePathsToWatchs[jobCnt] = key;
                        tmpDeleteMinutes[jobCnt] = Helper.TryInt(deleteSettings[key], DefaultDeleteMinute);
                    }
                    DeletePathsToWatchs = tmpDeletePathsToWatchs;
                    DeleteMinutes = tmpDeleteMinutes;
                }
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.ToString());
                DeletePathsToWatchs = null;
                DeleteMinutes = null;
            }
        }

        protected override void OnStart(string[] args)
        {
            deletePathTimer = new System.Timers.Timer();
            deletePathTimer.Interval = 60 * 1000; // 1시간마다 실행
            deletePathTimer.Elapsed += Timer_Elapsed;
            deletePathTimer.Start();
            
            serviceLoops();
        }
        private void Timer_Elapsed(object sender, ElapsedEventArgs e)
        {
            try
            {
                serviceLoops();
            }
            catch (Exception ex)
            {
            }
        }
        private void serviceLoops()
        {
            try
            {
                if (DeletePathsToWatchs == null || DeletePathsToWatchs.Length == 0)
                {
                    Console.WriteLine("등록되어 있는 작업 정보가 없습니다. 설정정보를 다시 확인합니다.");
                    loadConfiguration();
                    return;
                }

                for (int ii = 0; ii < DeletePathsToWatchs.Length; ii++)
                {
                    Console.WriteLine($"Delete Watch Path: {DeletePathsToWatchs[ii]}");
                    DeletePathFiles(DeletePathsToWatchs[ii], DeleteMinutes[ii]);
                }
            }
            catch (Exception ex)
            {
            }
        }


        private void DeletePathFiles(string pathDir, int deleteMin)
        {
            if (System.IO.File.Exists(pathDir))
            {
                Console.WriteLine($"'{pathDir}'는 파일입니다.");
            }
            else if (Directory.Exists(pathDir))
            {
                Console.WriteLine($"'{pathDir}'는 디렉토리입니다.");
                // 디렉토리 내 모든 파일 목록 가져오기 (하위 디렉토리 포함)
                string[] fileNames = Directory.GetFiles(pathDir, "*", SearchOption.AllDirectories);
                foreach (string file in fileNames)
                {
                    if (System.IO.File.Exists(file))
                    {
                        DeleteFile(file, deleteMin);
                    }
                }
            }
            else
            {
                Console.WriteLine($"'{pathDir}'는 존재하지 않는 경로입니다.");
            }
        }
        private void DeleteFile(string fileName, int deleteMin)
        {
            if (System.IO.File.Exists(fileName))
            {
                Console.WriteLine($"'{fileName}'는 파일입니다.");
                FileInfo fileInfo = new FileInfo(fileName);
                if (fileInfo.CreationTime.Date < DateTime.Now.AddMinutes(-deleteMin))
                {
                    System.IO.File.Delete(fileName);
                    Console.WriteLine($"'{fileName}'을 삭제했습니다.");
                }
            }
        }

        protected override void OnStop()
        {
            deletePathTimer.Stop();
            stopService();
        }

        private void stopService()
        {
            stopEvent?.Set();
            Thread.Sleep(5000);
        }

    }
}