using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Tango.PPC.Shared.Logs
{
    public pre { line-height: 125%; }
td.linenos .normal { color: inherit; background-color: transparent; padding-left: 5px; padding-right: 5px; }
span.linenos { color: inherit; background-color: transparent; padding-left: 5px; padding-right: 5px; }
td.linenos .special { color: #000000; background-color: #ffffc0; padding-left: 5px; padding-right: 5px; }
span.linenos.special { color: #000000; background-color: #ffffc0; padding-left: 5px; padding-right: 5px; }
.highlight .hll { background-color: #ffffcc }
.highlight .c { color: #888888 } /* Comment */
.highlight .err { color: #a61717; background-color: #e3d2d2 } /* Error */
.highlight .k { color: #008800; font-weight: bold } /* Keyword */
.highlight .ch { color: #888888 } /* Comment.Hashbang */
.highlight .cm { color: #888888 } /* Comment.Multiline */
.highlight .cp { color: #cc0000; font-weight: bold } /* Comment.Preproc */
.highlight .cpf { color: #888888 } /* Comment.PreprocFile */
.highlight .c1 { color: #888888 } /* Comment.Single */
.highlight .cs { color: #cc0000; font-weight: bold; background-color: #fff0f0 } /* Comment.Special */
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.highlight .il { color: #0000DD; font-weight: bold } /* Literal.Number.Integer.Long */
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Tango.BL;
using Tango.BL.Entities;
using Tango.BL.Enumerations;
using Tango.PPC.Common;
using Tango.PPC.Common.Notifications;
using Tango.PPC.Common.Notifications.NotificationItems;
using Tango.PPC.Events.Enumerations;
using System.Data.Entity;
using Tango.Integration.Operation;

namespace Tango.PPC.Events.ViewModels
{
    /// <summary>
    /// Represents the main view VM and entry point for <see cref="Events.EventsModule"/>.
    /// </summary>
    /// <seealso cref="Tango.PPC.Common.PPCViewModel" />
    public class MainViewVM : PPCViewModel
    {
        private Dictionary<EventTypes, NotificationItem> _notifications;

        private EventsSource _selectedEventsSource;
        public EventsSource SelectedEventsSource
        {
            get { return _selectedEventsSource; }
            set { _selectedEventsSource = value; RaisePropertyChangedAuto(); }
        }

        private ObservableCollection<MachinesEvent> _currentEvents;
        /// <summary>
        /// Gets or sets the current events.
        /// </summary>
        public ObservableCollection<MachinesEvent> CurrentEvents
        {
            get { return _currentEvents; }
            set { _currentEvents = value; RaisePropertyChangedAuto(); }
        }

        private MachinesEvent _selectedEvent;
        /// <summary>
        /// Gets or sets the selected event.
        /// </summary>
        public MachinesEvent SelectedEvent
        {
            get { return _selectedEvent; }
            set { _selectedEvent = value; RaisePropertyChangedAuto(); }
        }


        private ObservableCollection<MachinesEvent> _historyEvents;
        /// <summary>
        /// Gets or sets the history events.
        /// </summary>
        public ObservableCollection<MachinesEvent> HistoryEvents
        {
            get { return _historyEvents; }
            set { _historyEvents = value; RaisePropertyChangedAuto(); }
        }

        private MachinesEvent _selectedHistoryEvent;
        /// <summary>
        /// Gets or sets the selected event.
        /// </summary>
        public MachinesEvent SelectedHistoryEvent
        {
            get { return _selectedHistoryEvent; }
            set { _selectedHistoryEvent = value; RaisePropertyChangedAuto(); }
        }

        /// <summary>
        /// Initializes a new instance of the <see cref="MainViewVM"/> class.
        /// </summary>
        public MainViewVM()
        {
            CurrentEvents = new ObservableCollection<MachinesEvent>();
            _notifications = new Dictionary<EventTypes, NotificationItem>();
        }

        /// <summary>
        /// Called when the application has been started
        /// </summary>
        public override void OnApplicationStarted()
        {
            EventLogger.EventReceived += EventLogger_EventReceived;
            EventLogger.EventResolved += EventLogger_EventResolved;
        }

        public override async void OnApplicationReady()
        {
            base.OnApplicationReady();

            using (var db = ObservablesContext.CreateDefault())
            {
                var last_week = DateTime.UtcNow.AddDays(-7);
                HistoryEvents = (await db.MachinesEvents.Where(x => x.MachineGuid == MachineProvider.Machine.Guid && x.DateTime > last_week).Include(x => x.EventType).Where(x => (EventTypeNotificationTimes)x.EventType.EventNotificationTime != EventTypeNotificationTimes.None).ToListAsync()).OrderByDescending(x => x.DateTime).ToObservableCollection();
            }

            MachineProvider.MachineOperator.StatusChanged += MachineOperator_StatusChanged;
        }

        private void MachineOperator_StatusChanged(object sender, MachineStatuses status)
        {
            if (status == MachineStatuses.Disconnected)
            {
                foreach (var notification in _notifications.ToList())
                {
                    NotificationProvider.PopNotification(notification.Value);
                }

                _notifications.Clear();

                InvokeUI(() =>
                {
                    CurrentEvents.Clear();
                });
            }
        }

        private void EventLogger_EventReceived(object sender, MachinesEvent ev)
        {
            InvokeUI(() =>
            {
                if (ev.NotificationTime != EventTypeNotificationTimes.None)
                {
                    CurrentEvents.Insert(0, ev);

                    var notificationItem = new MessageNotificationItem();
                    notificationItem.CanClose = false;
                    notificationItem.Message = ev.EventType.Title;
                    notificationItem.ExpandedMessage = ev.Description;
                    notificationItem.Pressed += async (_, __) =>
                    {
                        SelectedEventsSource = EventsSource.CURRENT;
                        SelectedEvent = ev;
                        await NavigationManager.NavigateTo<EventsModule>();
                    };

                    switch (ev.Category)
                    {
                        case EventTypeCategories.Info:
                            notificationItem.MessageType = MessageNotificationItem.MessageNotificationItemTypes.Info;
                            break;
                        case EventTypeCategories.Warning:
                            notificationItem.MessageType = MessageNotificationItem.MessageNotificationItemTypes.Warning;
                            break;
                        case EventTypeCategories.Error:
                            notificationItem.MessageType = MessageNotificationItem.MessageNotificationItemTypes.Error;
                            break;
                        case EventTypeCategories.Critical:
                            notificationItem.MessageType = MessageNotificationItem.MessageNotificationItemTypes.Critical;
                            break;
                    }

                    NotificationProvider.PushNotification(notificationItem);
                    _notifications.Add(ev.EventType.Type, notificationItem);

                }
            });
        }

        private void EventLogger_EventResolved(object sender, MachinesEvent ev)
        {
            InvokeUI(() =>
            {
                if (ev.NotificationTime != EventTypeNotificationTimes.None)
                {
                    CurrentEvents.Remove(ev);
                    HistoryEvents.Insert(0, ev);

                    if (_notifications.ContainsKey(ev.EventType.Type))
                    {
                        var notification = _notifications[ev.EventType.Type];
                        _notifications.Remove(ev.EventType.Type);
                        NotificationProvider.PopNotification(notification);
                    }
                }
            });
        }

        public override void OnNavigatedTo()
        {
            base.OnNavigatedTo();
            NotificationProvider.NotificationsVisible = false;
        }

        public override void OnNavigatedFrom()
        {
            base.OnNavigatedFrom();
            NotificationProvider.NotificationsVisible = true;
        }
    }
}