using Aitex.Core.RT.Event;
using Aitex.Core.RT.Log;
using Aitex.Core.UI.MVVM;
using MECF.Framework.Common.DataCenter;
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Threading;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Input;
using System.Windows.Media.Imaging;

namespace Aitex.Sorter.UI.ViewModel
{
    /// <summary>
    /// 操作记录查询结果结构定义
    /// </summary>
    public class SystemLogItem
    {
        /// <summary>
        /// 时间
        /// </summary>
        public string Time { get; set; }

        /// <summary>
        /// ICON 
        /// </summary>
        public object Icon { get; set; }
        /// <summary>
        /// CEID 
        /// </summary>
        public object Ceid { get; set; }
        /// <summary>
        /// 类型：操作日志|事件|其他
        /// </summary>
        public string LogType { get; set; }

        /// <summary>
        /// 针对腔体
        /// </summary>
        public string TargetChamber { get; set; }

        /// <summary>
        /// 发起方
        /// </summary>
        public string Initiator { get; set; }

        /// <summary>
        /// 详情
        /// </summary>
        public string Detail { get; set; }
    }

    class PerPageItem
    {
        public string Value { get; set; }
    }

    class EventLogViewModel : UIViewModelBase
    {

        public bool SearchAlarmEvent { get; set; }
        public bool SearchWarningEvent { get; set; }
        public bool SearchInfoEvent { get; set; }
        public bool SearchOpeLog { get; set; }

        public bool SearchPMA { get; set; }
        public bool SearchPMB { get; set; }
        public bool SearchPMC { get; set; }
        public bool SearchPMD { get; set; }
        //public bool SearchCoolDown { get; set; }
        public bool SearchTM { get; set; }
        public bool SearchLL { get; set; }
        //public bool SearchBuf1 { get; set; }
        public bool SearchSystem { get; set; }

        public string SearchKeyWords { get; set; }

        public ICommand SearchCommand { get; set; }
        public ICommand ExportCommand { get; set; }
        public ICommand NavigateCommand { get; set; }

        

        public DateTime SearchBeginTime { get; set; }
        public DateTime SearchEndTime { get; set; }

        public string Keywords { get; set; }

        public ObservableCollection<string> EventList { get; set; }
        public string SelectedEvent { get; set; }

        public ObservableCollection<string> UserList { get; set; }
        public string SelectedUser { get; set; }

        public ObservableCollection<SystemLogItem> SearchedResult { get; set; }

        public Func<string, List<EventItem>> QueryDBEventFunc { get; set; }
        public Func<List<string>> QueryEventList { get; set; }


        public ObservableCollection<PerPageItem> PerPageItems { get; set; }

        public bool IsLoading { get; set; }

        private DateTime _pageStart;
        private DateTime _pageStop;
        private int _currentPage;
        private int _countPerPage;
        private int _totalPage;

        private PerPageItem _selectedPerPage;

        public PerPageItem SelectedPerPage
        {
            get
            {
                return _selectedPerPage;
            }
            set
            {
                _selectedPerPage = value;

                Task.Run(()=> DisplayResult(false));
            }
        }

        public string PageInfo { get; set; }

        private List<EventItem> _resultEvent;


        public bool EnableFirst { get; set; }
        public bool EnablePrevious { get; set; }
        public bool EnableNext { get; set; }
        public bool EnableLast { get; set; }

        public EventLogViewModel()
            : base("EventLogViewModel")
        {
            PerPageItems = new ObservableCollection<PerPageItem>();
            PerPageItems.Add(new PerPageItem(){Value = "All"});
            PerPageItems.Add(new PerPageItem() { Value = "30" });
            PerPageItems.Add(new PerPageItem() { Value = "300" });
            PerPageItems.Add(new PerPageItem() { Value = "3000" });
            PerPageItems.Add(new PerPageItem() { Value = "30000" });

            _selectedPerPage = PerPageItems[0];

            PageInfo = "0/0";

            QueryDBEventFunc = (sql) => QueryDataClient.Instance.Service.QueryDBEvent(sql);


            QueryEventList = () =>
                                    {
                                        List<string> result = new List<string>();

                                        foreach (var eventName in Enum.GetNames(typeof(EventEnum)))
                                            result.Add(eventName);

                                        return result;
                                    };


            var now = DateTime.Today;
            SearchBeginTime = now;// -new TimeSpan(1, 0, 0, 0);
            SearchEndTime = new DateTime(now.Year, now.Month, now.Day, 23, 59, 59, 999);

            SelectedUser = "All";
            SearchKeyWords = string.Empty;


            SearchAlarmEvent = true;
            SearchWarningEvent = true;
            SearchInfoEvent = true;
            SearchOpeLog = false;

            SearchPMA = false;
            SearchPMB = false;
            SearchPMC = false;
            SearchPMD = false;
            //SearchCoolDown = false;
            SearchTM = false;
            SearchLL = false;
            //SearchBuf1 = false;
            SearchSystem = false;


            SearchCommand = new DelegateCommand<object>((o) => Search(), (o) => true);
            ExportCommand = new DelegateCommand<object>((o) => Export(), (o) => true);

            NavigateCommand = new DelegateCommand<string>((o) => Navigate(o), (o) => true);
        }

        protected override void InvokeBeforeUpdateProperty(Dictionary<string, object> data)
        {

        }

        public void Navigate(string args)
        {
            if (args == "first")
                _currentPage = 1;
            if (args == "previous")
                _currentPage--;
            if (args == "next")
                _currentPage++;
            if (args == "last")
                _currentPage = _totalPage;

            DisplayResult(false);
        }



        /// <summary>
        /// 预先载入数据
        /// </summary>
        public void Preload()
        {



            //初始化所有的枚举事件类型
            EventList = new ObservableCollection<string>();
            EventList.Add("All");
            if (QueryEventList != null)
            {
                List<string> evList = QueryEventList();
                foreach (string ev in evList)
                    EventList.Add(ev);
            }
            SelectedEvent = "All";
 
            //所有属性更新
            InvokePropertyChanged();

            //第一次默认查询
            if (SearchedResult == null)
                Search();
        }


        /// <summary>
        /// 导出
        /// </summary>
        void Export()
        {
            try
            {
                Microsoft.Win32.SaveFileDialog dlg = new Microsoft.Win32.SaveFileDialog();
                dlg.DefaultExt = ".xls"; // Default file extension 
                dlg.Filter = "Excel数据表格文件(*.xls)|*.xls"; // Filter files by extension 
                Nullable<bool> result = dlg.ShowDialog();// Show open file dialog box
                if (result == true) // Process open file dialog box results
                {
                    System.Data.DataSet ds = new System.Data.DataSet();
                    ds.Tables.Add(new System.Data.DataTable("系统运行日志"));
                    ds.Tables[0].Columns.Add("类型");
                    ds.Tables[0].Columns.Add("时间");
                    ds.Tables[0].Columns.Add("腔体");
                    ds.Tables[0].Columns.Add("发起源");
                    ds.Tables[0].Columns.Add("内容描述");
                    foreach (var item in SearchedResult)
                    {
                        var row = ds.Tables[0].NewRow();
                        row[0] = item.LogType;
                        row[1] = item.Time;
                        row[2] = item.TargetChamber;
                        row[3] = item.Initiator;
                        row[4] = item.Detail;
                        ds.Tables[0].Rows.Add(row);
                    }
                    ds.WriteXml(dlg.FileName);
                }
            }
            catch (Exception ex)
            {
                LOG.Write(ex);
                MessageBox.Show("导出系统日志发生错误", "导出失败", MessageBoxButton.OK, MessageBoxImage.Warning);
            }
        }

        private string GetSourceWhere()
        {
            return "";
        }


        /*
         *
         *   gid integer NOT NULL DEFAULT nextval('event_data_gid_seq'::regclass),
  event_id integer,
  event_enum text,
  type text,
  source text,
  description text,
  level text,
  occur_time timestamp without time zone,
  CONSTRAINT event_data_pkey PRIMARY KEY (gid)
         */

        /// <summary>
        /// 查询
        /// </summary>
        void Search()
        {
            if (IsLoading)
                return;

            IsLoading = true;
            InvokePropertyChanged("IsLoading");

            Task.Factory.StartNew(() =>
            {
                try
                {
                    string sqlEvent = "";
                    string sqlOperationLog = "";
                    string sql = "";

                    if (SearchAlarmEvent || SearchWarningEvent || SearchInfoEvent)
                    {
                        sqlEvent = string.Format("SELECT \"event_id\", \"event_enum\", \"type\", \"occur_time\", \"level\",\"source\" , \"description\" FROM \"event_data\" where \"occur_time\" >='{0}' and \"occur_time\" <='{1}' ", SearchBeginTime.ToString("yyyyMMdd HHmmss"), SearchEndTime.ToString("yyyyMMdd HHmmss"));

                        sqlEvent += GetSourceWhere();

                        sqlEvent += " and (FALSE ";
                        if (SearchAlarmEvent) sqlEvent += " OR \"level\"='Alarm' ";
                        if (SearchWarningEvent) sqlEvent += " OR \"level\"='Warning' ";
                        if (SearchInfoEvent) sqlEvent += " OR \"level\"='Information' ";
                        sqlEvent += " ) ";

                        if (!string.IsNullOrWhiteSpace(SelectedEvent) && SelectedEvent != "All") sqlEvent += string.Format(" and lower(\"event_enum\")='{0}' ", SelectedEvent.ToLower());

                        if (!string.IsNullOrWhiteSpace(SearchKeyWords)) sqlEvent += string.Format(" and lower(\"description\") like '%{0}%' ", SearchKeyWords.ToLower());
                    }

                    sql = sqlEvent;

                    if (!string.IsNullOrEmpty(sqlOperationLog))
                    {
                        if (string.IsNullOrEmpty(sql))
                        {
                            sql = sqlOperationLog;
                        }
                        else
                        {
                            sql += " UNION ALL " + sqlOperationLog;
                        }
                    }


                    if (!string.IsNullOrEmpty(sql) && QueryDBEventFunc != null)
                    {
                        sql += " order by \"occur_time\" asc ;";

                        _resultEvent = QueryDBEventFunc(sql);

                        IsLoading = false;


                        DisplayResult(true);

                        Application.Current.Dispatcher.BeginInvoke(new Action(() =>
                        {
                            InvokePropertyChanged("IsLoading");
                        }));
                    }
                    else
                    {
                        IsLoading = false;
                        Application.Current.Dispatcher.BeginInvoke(new Action(() =>
                        {
                            InvokePropertyChanged("IsLoading");
                        }));
                        Application.Current.Dispatcher.BeginInvoke(new Action(() =>
                        {
                            SearchedResult = new ObservableCollection<SystemLogItem>();
                            InvokePropertyChanged("SearchedResult");
                        }));
                    }
                }
                catch (Exception ex)
                {
                    LOG.Write(ex);
                }
            });


        }


        private void DisplayResult(bool firstTimeDisplay)
        {
            if (IsLoading)
                return;

            SearchedResult = new ObservableCollection<SystemLogItem>();

            if (_resultEvent == null || _resultEvent.Count == 0)
            {
                PageInfo = "0/0";
                EnableFirst = EnableLast = EnableNext = EnablePrevious = false;

                Application.Current.Dispatcher.BeginInvoke(new Action(() =>
                {
                    InvokePropertyChanged(nameof(SearchedResult));
                    InvokePropertyChanged(nameof(PageInfo));
                    InvokePropertyChanged(nameof(EnableFirst));
                    InvokePropertyChanged(nameof(EnableLast));
                    InvokePropertyChanged(nameof(EnableNext));
                    InvokePropertyChanged(nameof(EnablePrevious));
                }));

                return;
            }

            if (SelectedPerPage==null || SelectedPerPage.Value == "All" || string.IsNullOrEmpty(SelectedPerPage.Value))
            {
                _countPerPage = _resultEvent.Count;
            }
            else
            {
                _countPerPage = int.Parse(SelectedPerPage.Value);
            }

            if (firstTimeDisplay)
            {
                _currentPage = 1;
            }

            _totalPage = _resultEvent.Count / _countPerPage + (_resultEvent.Count % _countPerPage > 0 ? 1 : 0);

            if (_currentPage < 1)
                _currentPage = 1;

            if (_currentPage > _totalPage)
                _currentPage = _totalPage;

            EnableFirst = _currentPage > 1;
            EnablePrevious = _currentPage > 1;
            EnableNext = _currentPage < _totalPage;
            EnableLast = _currentPage < _totalPage;

            PageInfo = $"{_currentPage}/{_totalPage}";

            Application.Current.Dispatcher.BeginInvoke(new Action(() =>
            {
                InvokePropertyChanged(nameof(SearchedResult));
                InvokePropertyChanged(nameof(PageInfo));
                InvokePropertyChanged(nameof(EnableFirst));
                InvokePropertyChanged(nameof(EnableLast));
                InvokePropertyChanged(nameof(EnableNext));
                InvokePropertyChanged(nameof(EnablePrevious));
            }));

            //2000一次，显示全部页面

            int from = (_currentPage - 1) * _countPerPage;

            for (int i = 0; i < _countPerPage; i = i + 2000)
            {
                Application.Current.Dispatcher.BeginInvoke(new Action<int>((index) =>
                {
                    string logTypeStr;

                    for (int j = from+index; j - index-from < Math.Min(2000,_countPerPage)  && j < _resultEvent.Count; j++)
                    {
                        EventItem ev = _resultEvent[j];
                        switch (ev.Level)
                        {
                            case EventLevel.Information: logTypeStr = "Info"; break;
                            case EventLevel.Warning: logTypeStr = "Warning"; break;
                            case EventLevel.Alarm: logTypeStr = "Alarm"; break;
                            default: logTypeStr = "Undefine"; break;
                        }

                        SearchedResult.Add(new SystemLogItem()
                        {
                            Time = ((DateTime)ev.OccuringTime).ToString("yyyy/MM/dd HH:mm:ss.fff"),
                            LogType = logTypeStr,
                            Detail = ev.Description,
                            Ceid = ev.Id,
                            TargetChamber = ev.Source,
                            Initiator = "",
                            Icon = new BitmapImage(new Uri(string.Format("pack://application:,,,/MECF.Framework.UI.Core;component/Resources/SystemLog/{0}.png", ev.Level.ToString()), UriKind.Absolute))
                        });
                    }
                    InvokePropertyChanged("SearchedResult");
                }), i);

                Thread.Sleep(300);
            }


        }



        private void OnPerPageChanged()
        {

        }
    }
}