using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Collections.Specialized;
using System.ComponentModel;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Data;
using Tango.BL;
using Tango.BL.Entities;
using Tango.BL.Enumerations;
using Tango.Core.Commands;
using Tango.Core.DI;
using Tango.PPC.Common;
using Tango.PPC.Common.Connection;
using Tango.PPC.Common.ExternalBridge;
using Tango.PPC.Common.Messages;
using Tango.SharedUI.Components;
using Tango.WiFi;

namespace Tango.PPC.MachineSettings.ViewModels
{
    /// <summary>
    /// Represents the main view VM and entry point for <see cref="Synchronization.MyModule"/>.
    /// </summary>
    /// <seealso cref="Tango.PPC.Common.PPCViewModel" />
    public class MainViewVM : PPCViewModel
    {
        #region Properties

        private Machine _machine;
        public Machine Machine
        {
            get { return _machine; }
            set { _machine = value; RaisePropertyChangedAuto(); }
        }

        private SelectedObjectCollection<JobTypes> _selectedJobTypes;
        public SelectedObjectCollection<JobTypes> SelectedJobTypes
        {
            get { return _selectedJobTypes; }
            set { _selectedJobTypes = value; RaisePropertyChangedAuto(); }
        }

        private SelectedObjectCollection<ColorSpaces> _selectedColorSpaces;
        public SelectedObjectCollection<ColorSpaces> SelectedColorSpaces
        {
            get { return _selectedColorSpaces; }
            set { _selectedColorSpaces = value; RaisePropertyChangedAuto(); }
        }

        private bool _enableHotSpot;
        public bool EnableHotSpot
        {
            get { return _enableHotSpot; }
            set { _enableHotSpot = value; RaisePropertyChangedAuto(); OnEnableHotSpotChanged(); }
        }

        private String _hotSpotPassword;
        public String HotSpotPassword
        {
            get { return _hotSpotPassword; }
            set { _hotSpotPassword = value; RaisePropertyChangedAuto(); }
        }

        private bool _enableExternalBridge;
        public bool EnableExternalBridge
        {
            get { return _enableExternalBridge; }
            set { _enableExternalBridge = value; RaisePropertyChangedAuto(); OnEnableExternalBridgeChanged(); }
        }

        private String _externalBridgePassword;
        public String ExternalBridgePassword
        {
            get { return _externalBridgePassword; }
            set { _externalBridgePassword = value; RaisePropertyChangedAuto(); }
        }

        private bool _enableRemoteAssistance;
        public bool EnableRemoteAssistance
        {
            get { return _enableRemoteAssistance; }
            set { _enableRemoteAssistance = value; RaisePropertyChangedAuto(); OnEnableRemoteAssistanceChanged(); }
        }

        #endregion

        #region Commands

        /// <summary>
        /// Gets or sets the save command.
        /// </summary>
        public RelayCommand SaveCommand { get; set; }

        /// <summary>
        /// Gets or sets the discard command.
        /// </summary>
        public RelayCommand DiscardCommand { get; set; }

        #endregion

        public MainViewVM()
        {
            SaveCommand = new RelayCommand(Save);
            DiscardCommand = new RelayCommand(Discard);
        }

        private void Discard()
        {
            NavigationManager.NavigateBack();
        }

        private async void Save()
        {
            if (Validate())
            {
                Machine.SupportedJobTypes = SelectedJobTypes.SynchedSource.ToList();
                Machine.SupportedColorSpaces = SelectedColorSpaces.SynchedSource.ToList();
                Machine.MapPrimitivesWithStrings(MachineProvider.Machine);

                Settings.EnableHotSpot = EnableHotSpot;
                Settings.HotSpotPassword = HotSpotPassword;
                Settings.EnableExternalBridge = EnableExternalBridge;
                Settings.ExternalBridgePassword = ExternalBridgePassword;
                Settings.Save();

                await MachineProvider.SaveMachine();
                await NavigationManager.NavigateBack();
            }
        }

        protected override void OnValidating()
        {
            base.OnValidating();
        }

        /// <summary>
        /// Called when the application has been started
        /// </summary>
        public override void OnApplicationStarted()
        {

        }

        public override void OnNavigatedTo()
        {
            base.OnNavigatedTo();

            Machine = MachineProvider.Machine.ShallowClone();

            RaisePropertyChanged(nameof(Machine));

            _enableHotSpot = HotSpotProvider.IsEnabled;
            RaisePropertyChanged(nameof(EnableHotSpot));

            HotSpotPassword = Settings.HotSpotPassword;

            _enableExternalBridge = ExternalBridgeService.Enabled;
            RaisePropertyChanged(nameof(EnableExternalBridge));

            ExternalBridgePassword = Settings.ExternalBridgePassword;

            _enableRemoteAssistance = RemoteAssistanceProvider.IsEnabled;
            RaisePropertyChanged(nameof(EnableRemoteAssistance));


            SelectedJobTypes = new SelectedObjectCollection<JobTypes>(Enum.GetValues(typeof(JobTypes)).Cast<JobTypes>().ToObservableCollection(), Machine.SupportedJobTypes.ToObservableCollection());
            SelectedColorSpaces = new SelectedObjectCollection<ColorSpaces>(Enum.GetValues(typeof(ColorSpaces)).Cast<ColorSpaces>().Where(x => x.IsUserSpace()).ToObservableCollection(), Machine.SupportedColorSpaces.ToObservableCollection());
        }

        private async void OnEnableRemoteAssistanceChanged()
        {
            if (EnableRemoteAssistance)
            {
                try
                {
                    await RemoteAssistanceProvider.EnableRemoteAssistance();
                }
                catch
                {
                    await NotificationProvider.ShowError("An error occurred while trying to activate the remote assistance service. Please check your device settings and try again.");
                    _enableRemoteAssistance = false;
                }
            }
            else
            {
                try
                {
                    await RemoteAssistanceProvider.DisableRemoteAssistance();
                }
                catch
                {
                    await NotificationProvider.ShowError("An error occurred while trying to deactivate the remote assistance service. Please check your device settings and try again.");
                    _enableRemoteAssistance = true;
                }
            }

            RaisePropertyChanged(nameof(EnableRemoteAssistance));
        }

        private async void OnEnableHotSpotChanged()
        {
            if (EnableHotSpot)
            {
                if (HotSpotPassword == null || HotSpotPassword.Length < 8 || HotSpotPassword.Length > 16)
                {
                    await NotificationProvider.ShowError("Hot spot requires a password of 8 to 16 characters.");
                    _enableHotSpot = false;
                    RaisePropertyChanged(nameof(EnableHotSpot));
                    return;
                }

                try
                {
                    await HotSpotProvider.EnableHotSpot(HotSpotPassword);
                }
                catch
                {
                    await NotificationProvider.ShowError("An error occurred while trying to activate the hot spot network. Please check your device settings and try again.");
                    _enableHotSpot = false;
                }
            }
            else
            {
                try
                {
                    await HotSpotProvider.DisableHotSpot();
                }
                catch
                {
                    await NotificationProvider.ShowError("An error occurred while trying to deactivate the hot spot network.");
                    _enableHotSpot = true;
                }
            }

            RaisePropertyChanged(nameof(EnableHotSpot));
        }

        private void OnEnableExternalBridgeChanged()
        {
            ExternalBridgeService.Enabled = EnableExternalBridge;
        }
    }
}