using Microsoft.Azure.Management.AppService.Fluent;
using Microsoft.Azure.Management.Fluent;
using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using Tango.AzureUtils.Environment;
using Tango.Core.Commands;

namespace Tango.AzureUtils.UI.ViewModels
{
    public class EnvironmentRemovalViewVM : AzureDashboardViewModel
    {
        private IWebAppBase _machineServiceApp;
        private EnvironmentManager _environmentManager;

        private List<IDeploymentSlot> _deploymentSlots;
        public List<IDeploymentSlot> DeploymentSlots
        {
            get { return _deploymentSlots; }
            set { _deploymentSlots = value; RaisePropertyChangedAuto(); }
        }

        private IDeploymentSlot _selectedDeploymentSlot;
        public IDeploymentSlot SelectedDeploymentSlot
        {
            get { return _selectedDeploymentSlot; }
            set { _selectedDeploymentSlot = value; RaisePropertyChangedAuto(); }
        }

        private String _slotName;
        [Required(ErrorMessage = "Deployment slot name confirmation is required.")]
        public String SlotName
        {
            get { return _slotName; }
            set { _slotName = value; RaisePropertyChangedAuto(); }
        }

        private RemoveEnvironmentConfiguration _config;
        public RemoveEnvironmentConfiguration Config
        {
            get { return _config; }
            set { _config = value; RaisePropertyChangedAuto(); }
        }

        public RelayCommand RemoveEnvironmentCommand { get; set; }

        public EnvironmentRemovalViewVM()
        {
            RemoveEnvironmentCommand = new RelayCommand(RemoveEnvironment);
            Config = new RemoveEnvironmentConfiguration();
        }

        public override void OnAuthenticated(IAzure azure, List<IWebAppBase> apps)
        {
            _machineServiceApp = apps.SingleOrDefault(x => x.Name == "MachineService");
            DeploymentSlots = apps.OfType<IDeploymentSlot>().Where(x => x.Parent == _machineServiceApp).ToList();
            SelectedDeploymentSlot = DeploymentSlots.FirstOrDefault();

            _environmentManager = new EnvironmentManager(azure);
            _environmentManager.ConfirmationRequired += ConfirmationHandler;
            _environmentManager.Progress += ProgressHandler;
        }

        private async void RemoveEnvironment()
        {
            try
            {
                if (!Validate()) return;

                IsFree = false;

                Config.Email = Settings.Email;
                Config.Password = Settings.Password;

                await _environmentManager.RemoveEnvironment(SelectedDeploymentSlot, SlotName, Config);
            }
            catch (Exception ex)
            {
                StatusManager.UpdateStatus(ex);
            }
            finally
            {
                RequireRefresh();
                IsFree = true;
            }
        }

        protected override void OnRefreshRequired()
        {
            base.OnRefreshRequired();
            SelectedDeploymentSlot = null;
        }
    }
}