using System;
using System.Collections.Generic;
using System.Data.SqlClient;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Tango.Core;
using Tango.Core.Commands;
using Tango.PPC.Common;
using Tango.PPC.Common.Application;
using Tango.PPC.Common.MachineSetup;
using Tango.PPC.Common.Navigation;
using Tango.PPC.UI.ViewsContracts;
using Tango.Settings;
using Tango.SharedUI.Helpers;
using Tango.SQLExaminer;

namespace Tango.PPC.UI.ViewModels
{
    public class MachineSetupViewVM : PPCViewModel<IMachineSetupView>
    {
        public enum MachineSetupStates
        {
            None,
            Working,
            Completed,
            Failed,
        }

        private bool _postSetp;

        private SetupRequiredEventArgs _setupRequiredEventArgs;

        public IMachineSetupManager MachineSetupManager { get; set; }

        private String _serialNumber;
        public String SerialNumber
        {
            get { return _serialNumber; }
            set { _serialNumber = value; RaisePropertyChangedAuto(); InvalidateRelayCommands(); }
        }

        private String _hostAddress;
        public String HostAddress
        {
            get { return _hostAddress; }
            set { _hostAddress = value; RaisePropertyChangedAuto(); InvalidateRelayCommands(); }
        }

        private String _log;
        public String Log
        {
            get { return _log; }
            set { _log = value; RaisePropertyChangedAuto(); }
        }

        private MachineSetupStates _state;
        public MachineSetupStates State
        {
            get { return _state; }
            set { _state = value; RaisePropertyChangedAuto(); InvalidateRelayCommands(); }
        }

        public RelayCommand StartCommand { get; set; }

        public RelayCommand CompleteCommand { get; set; }

        public MachineSetupViewVM(IPPCApplicationManager applicationManager, IMachineSetupManager machineSetupManager)
        {
            MachineSetupManager = machineSetupManager;
            MachineSetupManager.ProgressLog += (x, msg) => AppendLog(msg);
            MachineSetupManager.ProgressStep += (x, step) => AppendLog(Environment.NewLine + "-----------" + step.ToDescription().ToUpper() + "-----------" + Environment.NewLine);

            HostAddress = "localhost\\SQLEXPRESS";
            SerialNumber = "1111";

            StartCommand = new RelayCommand(StartSetup, () => !String.IsNullOrWhiteSpace(HostAddress) && !String.IsNullOrWhiteSpace(SerialNumber) && State == MachineSetupStates.None);
            CompleteCommand = new RelayCommand(CompleteSetup, () => State == MachineSetupStates.Completed);

            applicationManager.SetupRequired += ApplicationManager_SetupRequired;
        }

        private void ApplicationManager_SetupRequired(object sender, SetupRequiredEventArgs e)
        {
            _setupRequiredEventArgs = e;
        }

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

            if (_postSetp)
            {
                NavigationManager.NavigateTo(Common.Navigation.NavigationView.LoginView);
            }
        }

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

        private void AppendLog(String msg)
        {
            if (msg != null && !msg.Contains("SQL Examiner"))
            {
                InvokeUI(() =>
                {
                    View.AppendLog(msg + Environment.NewLine);
                });
            }
        }

        private async void StartSetup()
        {
            State = MachineSetupStates.Working;

            try
            {
                await MachineSetupManager.Setup(SerialNumber, HostAddress);
                Settings.HasSetup = true;
                _postSetp = true;
                Settings.Save();
                State = MachineSetupStates.Completed;
            }
            catch (Exception ex)
            {
                State = MachineSetupStates.Failed;
                await NotificationProvider.ShowInfo(ex.Message);
            }
        }

        private void CompleteSetup()
        {
            NavigationManager.NavigateWithObject(NavigationView.LoadingView, new MachineSetupResult() { Completed = true });
        }
    }
}