using HMI.Base;
using HMI.Core.Util;
using HMI.UI.Util;
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 int currentPage = 1;
        public int CurrentPage
        {
            get => currentPage;
            set
            {
                Set(ref currentPage, value);
            }
        }

        private int maxPage = 0;
        public int MaxPage
        {
            get => maxPage;
            set
            {
                Set(ref currentPage, value);
            }
        }


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

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

        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;
                }

                queryBtn.IsEnabled = false;
                autoRfhInput.IsEnabled = false;
                Filtrate();
            }
            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()
        {
            levelInput.Text = null;
            startTimeInput.SelectedDateTime = null;
            endTimeInput.SelectedDateTime = null;
            startTimeInput.Text = null;
            table.ItemsSource = null;
        }

        private void Filtrate()
        {
            string str = LoadSql();
            DataTable dt = new DataTable();
            var files = GetOldDbFiles(PathHelper.LogViewerDir, new DateTime?[] { startTimeInput.SelectedDateTime,
                endTimeInput.SelectedDateTime });
            foreach (string file in files)
            {
                using (SqliteHelper sql = new SqliteHelper(file))
                {
                    dt.Merge(sql.GetDataTable(str));
                }
            }
            if (dt.Rows.Count > 0)
            {
                dt.DefaultView.Sort = "time Desc";
            }
            table.ItemsSource = dt.DefaultView;
        }

        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>
        /// 加载界面判断数据库语句
        /// </summary>
        /// <returns> str数据库的语句 </returns>
        private string LoadSql()
        {
            string sql = " select level,time,source,text from 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} order by time desc";
            return sql;
        }

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