using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Tango.BL.Entities;
using Tango.Core.Commands;
using Tango.Core.DI;
using Tango.FSE.BL;
using Tango.FSE.Common;
using Tango.FSE.Common.AutoComplete;
using Tango.FSE.Common.SQL;
using Tango.FSE.MachineConfiguration.Messages;
using static Tango.FSE.BL.Services.MachineConfigurationService;

namespace Tango.FSE.MachineConfiguration.ViewModels
{
    public class SettingsViewVM : FSEViewModel
    {
        [TangoInject]
        private IRemoteSqlProvider RemoteSqlProvider { get; set; }

        private MachineEditingComposition _editingComposition;
        public MachineEditingComposition EditingComposition
        {
            get { return _editingComposition; }
            set { _editingComposition = value; RaisePropertyChangedAuto(); }
        }

        public RelayCommand SaveCommand { get; set; }
        public RelayCommand ResetCountersCommand { get; set; }
        public RelayCommand ResetDeviceRegistrationCommand { get; set; }

        private List<Site> _sites;
        public List<Site> Sites
        {
            get { return _sites; }
            set { _sites = value; RaisePropertyChangedAuto(); }
        }

        private Site _selectedSite;
        public Site SelectedSite
        {
            get { return _selectedSite; }
            set { _selectedSite = value; RaisePropertyChangedAuto(); }
        }

        public SettingsViewVM()
        {
            RegisterForMessage<EditingCompositionLoadedMessage>(OnEditingCompositionLoaded);
            SaveCommand = new RelayCommand(SaveConfiguration);
            ResetCountersCommand = new RelayCommand(ResetCounters);
            ResetDeviceRegistrationCommand = new RelayCommand(ResetDeviceRegistration);
        }

        private void OnEditingCompositionLoaded(EditingCompositionLoadedMessage msg)
        {
            using (NotificationProvider.PushTaskItem("Loading machine configuration..."))
            {
                EditingComposition = msg.EditingComposition;
                EditingComposition.Machine.ForceVersionUpdateChanged += (x, value) => { if (value) EditingComposition.Machine.SuspendVersionUpdate = false; };
                EditingComposition.Machine.SuspendVersionUpdateChanged += (x, value) => { if (value) EditingComposition.Machine.ForceVersionUpdate = false; };
                EditingComposition.Machine.OrganizationChanged -= OnMachine_OrganizationChanged;
                EditingComposition.Machine.OrganizationChanged += OnMachine_OrganizationChanged;
                OnMachine_OrganizationChanged(EditingComposition.Machine, EditingComposition.Machine.Organization);
            }
        }

        private void OnMachine_OrganizationChanged(object sender, Organization organization)
        {
            var sites = organization.Sites.ToList();
            sites.Insert(0, new Site() { Guid = null, Name = "NONE", ID = -1 });
            Sites = sites;
            SelectedSite = Sites.FirstOrDefault(x => x.Guid == EditingComposition.Machine.SiteGuid);

            if (SelectedSite == null)
            {
                SelectedSite = Sites.First();
            }
        }

        private async void SaveConfiguration()
        {
            try
            {
                using (NotificationProvider.PushTaskItem("Saving machine configuration..."))
                {
                    EditingComposition.Machine.SiteGuid = SelectedSite.Guid;
                    EditingComposition = await Services.MachineConfigurationService.SaveMachineEditingComposition(EditingComposition);
                    await NotificationProvider.ShowSuccess("Machine configuration saved successfully.");
                }
            }
            catch (Exception ex)
            {
                LogManager.Log(ex, "Error saving the machine configuration.");
                await NotificationProvider.ShowError($"Error saving the machine configuration.\n{ex.FlattenMessage()}");
            }
        }

        private async void ResetCounters()
        {
            if (!CurrentUser.HasPermission(Tango.BL.Enumerations.Permissions.FSE_ResetMachineCounters))
            {
                await NotificationProvider.ShowError("The current user profile does not allow resetting the machine counters.\nPlease contact your administrator.");
                return;
            }

            if (!MachineProvider.IsPPCAvailable)
            {
                await NotificationProvider.ShowError("Resetting the machine counters requires an active connection to this machine.");
                return;
            }

            if (!await NotificationProvider.ShowWarningQuestion("Resetting the machine counters will delete the entire job runs history. Are you sure?", "RESET COUNTERS", "CANCEL")) return;

            try
            {
                using (var task = NotificationProvider.PushTaskItem("Resetting machine counters..."))
                {
                    task.UpdateProgress("Resetting local machine counters...");

                    var result = await RemoteSqlProvider.ExecuteSqlCommandAsync(new RemoteSqlCommand()
                    {
                        Mode = RemoteSqlCommandMode.Local,
                        Timeout = 30,
                        SQL = "DELETE FROM JOB_RUNS"
                    });

                    int localJobRuns = result.LocalAffectedRecords;

                    task.UpdateProgress("Resetting global machine counters...");

                    int remoteJobRuns = await Services.MachineConfigurationService.ResetCounters(EditingComposition.Machine.Guid);
                    EditingComposition.ResetCounters();

                    await NotificationProvider.ShowSuccess("Machine counters deleted successfully.");
                }
            }
            catch (Exception ex)
            {
                LogManager.Log(ex, "Error resetting machine counters.");
                await NotificationProvider.ShowError($"Error resetting the machine counters.\n{ex.FlattenMessage()}");
            }
        }

        private async void ResetDeviceRegistration()
        {
            if (!CurrentUser.HasPermission(Tango.BL.Enumerations.Permissions.FSE_ResetMachineDeviceRegistration))
            {
                await NotificationProvider.ShowError("The current user profile does not allow resetting the device registration.\nPlease contact your administrator.");
                return;
            }

            if (!await NotificationProvider.ShowWarningQuestion("Resetting the machine's device registration will allow other panel PCs to perform a machine setup for this machine. Are you sure?", "RESET", "CANCEL")) return;

            EditingComposition.Machine.IsDeviceRegistered = false;
            EditingComposition.Machine.DeviceId = null;
            EditingComposition.Machine.DeviceName = null;
        }
    }
}