using HMI.Base;
using HMI.Core.Util;
using HMI.UI.Util;
using HMI.Util;
using Microsoft.Win32;
using System;
using System.Collections.Generic;
using System.Data;
using System.IO;
using System.Linq;
using System.Threading.Tasks;
using System.Timers;
using System.Windows;
using System.Windows.Controls;

namespace HMI.LogViewer
{
    /// <summary>
    /// UserControl1.xaml 的交互逻辑
    /// </summary>
    public partial class LogViewer : PluginControl
    {

        private bool autoRfh;

        public bool AutoRfh
        {
            get { return autoRfh; }
            set
            {
                Set(ref autoRfh, value);
                if (autoRfhTimer != null) autoRfhTimer.Enabled = value;
            }
        }

        private Timer autoRfhTimer;

        private long pageSize = 50;

        private long currentPage = 1;
        public long CurrentPage
        {
            get => currentPage;
            set
            {
                Set(ref currentPage, value);
                Filtrate(value, pageSize);
            }
        }

        private long maxPage = 1;
        public long MaxPage
        {
            get => maxPage;
            set
            {
                Set(ref maxPage, value);
            }
        }


        public LogViewer()
        {
            DataContext = this;
            autoRfhTimer = new Timer
            {
                Enabled = false,
                Interval = 1500,
                AutoReset = false
            };
            autoRfhTimer.Elapsed += AutoRfhTimer_Elapsed;
            InitializeComponent();
            QueryReset();
        }

        public override void InitFinish()
        {
            //base.InitFinish();
            //string baseFile = Path.Combine(logDir, "log.db");

            //try
            //{
            //    if (!File.Exists(baseFile))
            //    {
            //        SqliteHelper.CreateDatabase(baseFile);
            //    }
            //    SqliteHelper sqliteHelper = new SqliteHelper(baseFile);
            //    sqliteHelper.ExecuteSql(@"CREATE TABLE IF NOT EXISTS log (
            //        id INTEGER PRIMARY KEY AUTOINCREMENT,
            //        level TEXT NOT NULL,
            //        text TEXT NOT NULL,
            //        source TEXT,
            //        time TIME
            //        );");
            //}
            //catch (Exception ex)
            //{
            //    log.Error("Create Log File Failed.", ex);
            //}
        }

        private void UserControl_Loaded(object sender, RoutedEventArgs e)
        {
            Loaded -= UserControl_Loaded;
        }

        private void AutoRfhTimer_Elapsed(object sender, ElapsedEventArgs e)
        {
            Refresh100items();
        }

        //private void RefreshTable() { 
        //    if(CurrentPage == )
        //}

        private void Button_Click(object sender, RoutedEventArgs e)
        {
            Button btn = sender as Button;
            switch (btn.Name)
            {
                case "queryBtn":
                    QueryLog();
                    break;
                case "resetBtn":
                    QueryReset();
                    CurrentPage = 1;
                    break;
                case "exportBtn":
                    DoExport();
                    break;
                default:
                    break;
            }
        }

        private void DoExport()
        {
            try
            {
                SaveFileDialog sfd = new SaveFileDialog
                {
                    Filter = "Excel Files (*.xls)|*.xls",
                };
                if (sfd.ShowDialog() == true)
                {
                    var dt = GetDataTable(false, 1, 1, out long totalPage);
                    ExcelHelper.ExportExcel<LogData>(sfd.FileName, dt);
                    ToastHelper.Success(this.lang("App.ExportSuccess"));
                }
            }
            catch (Exception ex)
            {
                log.Error("Export Log Failed.", ex);
                MsgBoxHelper2.Error($"导出失败: {ex.Message}");
            }
        }

        private void QueryLog()
        {
            try
            {
                if (startTimeInput.SelectedDateTime == null && endTimeInput.SelectedDateTime == null)
                {
                    ToastHelper.Error(this.lang("log.timeCantBeNull"));
                    return;
                }

                if (endTimeInput.SelectedDateTime != null && startTimeInput.SelectedDateTime != null &&
                endTimeInput.SelectedDateTime < startTimeInput.SelectedDateTime)
                {
                    ToastHelper.Error(this.lang("log.timeRangeError"));
                    return;
                }

                AutoRfh = false;
                //queryBtn.IsEnabled = false;
                //autoRfhInput.IsEnabled = false;
                CurrentPage = 1;
            }
            catch (Exception ex)
            {
                log.Error("Log Query Failed.", ex);
                this.Error($"查询失败！{ex.Message}");
            }
            finally
            {
                queryBtn.IsEnabled = true;
                autoRfhInput.IsEnabled = true;
            }
        }

        private void QueryReset()
        {
            var today = DateTime.Now;
            var start = DateTime.Parse(today.ToString("yyyy-MM-dd 00:00:00")).AddDays(-7);
            var end = DateTime.Parse(today.ToString("yyyy-MM-dd 00:00:00")).AddDays(1);

            levelInput.Text = null;
            startTimeInput.SelectedDateTime = start;
            endTimeInput.SelectedDateTime = end;
        }

        public DataTable GetDataTable(bool usePage, long page, long size, out long totalPage)
        {
            totalPage = 0;
            var files = GetOldDbFiles(PathHelper.LogViewerDir, new DateTime?[] { startTimeInput.SelectedDateTime,
                endTimeInput.SelectedDateTime });
            if (files.Length <= 0)
            {
                return new DataTable();
            }

            using (Sqlite3Helper helper = new Sqlite3Helper(files[0]))
            {
                for (int i = 0; i < files.Length; i++)
                {
                    var attach = $"ATTACH DATABASE '{files[i]}' AS 'db{i}'";
                    helper.Execute(attach);
                }

                string sql = string.Join(" UNION ALL ", GetSqls(files));

                string sortName = "time", sortDirection = "DESC";

                string baseSql = $"SELECT level,time,source,text FROM ({sql}) as _temp";

                string countSql = $"SELECT COUNT(1) FROM ({sql}) as __temp";

                long total = (long)helper.SelectOne(countSql);
                totalPage = (total / pageSize) + ((total % pageSize) > 0 ? 1 : 0);

                if (usePage)
                {
                    sql = $"{baseSql} ORDER BY {sortName} {sortDirection} LIMIT {size} OFFSET {(page - 1) * size} ";
                }
                else
                {
                    sql = $"{baseSql} ORDER BY {sortName} {sortDirection}";
                }

                DataTable dt = helper.GetDataTable(sql);
                return dt;
            }
        }

        private void Filtrate(long page, long size)
        {
            try
            {
                //var files = GetOldDbFiles(PathHelper.LogViewerDir, new DateTime?[] { startTimeInput.SelectedDateTime,
                //endTimeInput.SelectedDateTime });
                //if (files.Length <= 0)
                //{
                //    table.ItemsSource = new DataTable().DefaultView;
                //    return;
                //}

                //using (Sqlite3Helper helper = new Sqlite3Helper(files[0]))
                //{
                //    for (int i = 0; i < files.Length; i++)
                //    {
                //        var attach = $"ATTACH DATABASE '{files[i]}' AS 'db{i}'";
                //        helper.Execute(attach);
                //    }

                //    string sql = string.Join(" UNION ALL ", GetSqls(files));

                //    string sortName = "time", sortDirection = "DESC";

                //    string baseSql = $"SELECT level,time,source,text FROM ({sql}) as _temp";

                //    string countSql = $"SELECT COUNT(1) FROM ({sql}) as __temp";

                //    long total = (long)helper.SelectOne(countSql);
                //    long pages = (total/pageSize)+ ((total % pageSize) > 0 ? 1 : 0);

                //    sql = $"{baseSql} ORDER BY {sortName} {sortDirection} LIMIT {size} OFFSET {(page - 1) * size} ";

                //    DataTable dt = helper.GetDataTable(sql);
                //    table.ItemsSource = dt.DefaultView;

                //    MaxPage = pages;
                //}
                table.ItemsSource = GetDataTable(true, page, size, out long totalPage).DefaultView;
                MaxPage = totalPage;
            }
            catch (Exception ex)
            {
                log.Error("Select Log Error.", ex);
                MsgBoxHelper2.Error($"查询失败: {ex.Message}");
            }
        }

        public static string[] GetOldDbFiles(string folderPath, DateTime?[] range)
        {
            if (!Directory.Exists(folderPath))
            {
                return new string[0];
            }
            // 获取所有.db文件并筛选出7天前更新的文件
            var oldFiles = Directory.GetFiles(folderPath, "*.db");
            try
            {
                oldFiles = oldFiles.Where(file =>
                {
                    var lastWriteTime = File.GetLastWriteTime(file);
                    bool flag = true;
                    if (range[0] != null) flag &= lastWriteTime >= range[0];
                    //if (range[1] != null) flag &= lastWriteTime <= range[1];
                    return flag;
                }).OrderByDescending(f => f).ToArray();

                return oldFiles;
            }
            catch (Exception ex)
            {
                return new string[0];
            }
        }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="files"></param>
        /// <returns></returns>
        private string[] GetSqls(string[] files)
        {
            string[] sqls = new string[files.Length];
            for (int i = 0; i < files.Length; i++)
            {
                string sql = $"SELECT level,time,source,text FROM db{i}.log";
                List<string> datas = new List<string>();
                if (!string.IsNullOrEmpty(levelInput.Text))
                {
                    datas.Add($"level='{levelInput.Text}'");
                }
                if (!string.IsNullOrEmpty(startTimeInput.Text))
                {
                    datas.Add($"time>='{startTimeInput.Text}'");
                }
                if (!string.IsNullOrEmpty(endTimeInput.Text))
                {
                    datas.Add($"time<'{endTimeInput.Text}'");
                }
                if (!string.IsNullOrEmpty(sourceInput.Text))
                {
                    datas.Add($"source='{sourceInput.Text}'");
                }

                string condition = string.Join(" AND ", datas);
                condition = string.IsNullOrEmpty(condition) ? string.Empty : $" WHERE {condition}";
                sql = $"{sql}{condition}";
                sqls[i] = sql;
            }
            return sqls;
        }

        /// <summary>
        /// 刷新100条数据
        /// </summary>
        private void Refresh100items()
        {
            autoRfhTimer.Enabled = false;
            Task.Run(() =>
            {
                try
                {
                    string todayLogFile = Path.Combine(PathHelper.LogViewerDir, $"log_{DateTime.Today:yyyy-MM-dd}.db");
                    if (!File.Exists(todayLogFile)) return;
                    string str = "select level,time,source,text from log order by time desc limit 100";
                    using (SqliteHelper sql = new SqliteHelper(todayLogFile))
                    {
                        var dt = sql.GetDataTable(str);
                        this.Dispatcher.BeginInvoke((Action)delegate ()
                        {
                            table.ItemsSource = dt.DefaultView;
                            MaxPage = 1;
                        });
                    }
                }
                catch (Exception ex)
                {
                    log.Error("Log Auto Refresh Failed.", ex);
                    this.Error($"自动刷新失败！{ex.Message}");
                }
                finally
                {
                    this.Dispatcher.BeginInvoke((Action)delegate ()
                    {
                        autoRfhTimer.Enabled = AutoRfh;
                    });
                }
            });
        }
    }
}