///
/// Copyright (c) 2020-2022 Sensus Slovensko a.s.
///
using System;
using System.Windows.Forms;
using Common;
using Common.Forms;
using TBF.Resources;
using TBF.UiBridge;

namespace TBF.UI.EventLogs
{
    public partial class EventLogsTabPageCtrl : UserControl
    {
        /// <summary> eventsListView columns </summary>
        enum Column
        {
            DateTime,
            Source,
            Class,
            Severity,
            Message,
            Count
        }

        MySortOrder sortOrder = MySortOrder.Ascending;
        int sortColumn = -1;                        /// 0-based index of column to be used for sorting


        public EventLogsTabPageCtrl()
        {
            InitializeComponent();

            int currentDpi = (int)this.CreateGraphics().DpiX;
            eventsListView.Columns.Add(Strings.Date_time, 100 * currentDpi / Constants.Dpi100pct);
            eventsListView.Columns.Add(Strings.Source,    100 * currentDpi / Constants.Dpi100pct);
            eventsListView.Columns.Add(Strings.Class,      85 * currentDpi / Constants.Dpi100pct);
            eventsListView.Columns.Add(Strings.Severity,   70 * currentDpi / Constants.Dpi100pct);
            eventsListView.Columns.Add(Strings.Message,   500 * currentDpi / Constants.Dpi100pct);

            if (SharedDatabase.EventsDB.RecentEvents != null)
            {
                foreach (var e in SharedDatabase.EventsDB.RecentEvents)
                {
                    DrawOneEvent(e);
                }
            }

			Bridge.EventHandler += delegate(object sender, EventEventArgs args)
			{
                if (InvokeRequired) { Invoke(new EventHandler<EventEventArgs>(OnEvent), sender, args); }
                else { OnEvent(sender, args); }
            };
		}

        void OnEvent(object sender, EventEventArgs args)
        {
            DrawOneEvent(args.Evnt);
        }

        void DrawOneEvent(SharedDatabase.Entities.Event evnt)
        {
            ListViewItem lvi = new ListViewItem(evnt.TimeStamp.ToString("dd.MM.yyyy HH:mm"));
            lvi.Tag = evnt;
            lvi.SubItems.Add(evnt.Source);
            lvi.SubItems.Add(evnt.EventClass.ToString());
            {
                lvi.UseItemStyleForSubItems = false;
                lvi.SubItems.Add(evnt.Severity.ToString());
                lvi.SubItems[lvi.SubItems.Count - 1].BackColor = SharedDatabase.Utils.GetSeverityColor(evnt.Severity);
                lvi.SubItems[lvi.SubItems.Count - 1].ForeColor = SharedDatabase.Utils.GetSeverityColor(evnt.Severity, true);
            }
            lvi.SubItems.Add(evnt.Message);
            eventsListView.Items.Add(lvi);
        }

        private void eventsListView_ColumnClick(object sender, ColumnClickEventArgs e)
        {
            if (e.Column == sortColumn)
            {
                sortOrder = (sortOrder == MySortOrder.Ascending) ? MySortOrder.Descending : MySortOrder.Ascending;
            }
            else
            {
                /// Clicked on another column header => set sortOrder to SortOrder.Ascending
                sortColumn = e.Column;
                sortOrder = MySortOrder.Ascending;
            }

            switch ((Column)sortColumn)
            {
                default:
                case Column.DateTime:
                    eventsListView.ListViewItemSorter = new LviDateTimeColumnComparer(sortColumn, sortOrder);
                    break;
                case Column.Source:
                case Column.Class:
                case Column.Severity:
                case Column.Message:
                    eventsListView.ListViewItemSorter = new LviTextColumnComparer(sortColumn, sortOrder);
                    break;
            }

            eventsListView.SetSortIcon(sortColumn, sortOrder);
            eventsListView.Sort();
        }
	}
}