using System;
using System.ComponentModel;
using System.Threading.Tasks;
using System.Windows.Forms;
using HeuristicLab.Clients.Hive.CloudManager.Azure;
using HeuristicLab.Clients.Hive.CloudManager.Model;

namespace HeuristicLab.Clients.Hive.CloudManager.Views {
  public partial class DeleteDeploymentView : Form {
    private const string formatDeleteDepoyment = "Are you sure you want to delete \" {0} \"";
    private const string formatDeleteHostedService = "Also delete Hosted Service \"{0}\"";
    private Deployment deployment;
    private HostedService hostedService;
    private BackgroundWorker worker;

    public bool ErrorOccured { get; set; }

    public DeleteDeploymentView(Deployment dep, HostedService hs) {
      InitializeComponent();
      worker = new BackgroundWorker();
      worker.DoWork += new DoWorkEventHandler(DeleteDeploymentTask);
      worker.RunWorkerCompleted += new RunWorkerCompletedEventHandler(WorkerCompleted);

      deployment = dep;
      hostedService = hs;

      lblDialogText.Text = string.Format(formatDeleteDepoyment, deployment.Label);
      if (hostedService.Deployments.Count < 2)
        cbDeleteHostedService.Visible = true;
      cbDeleteHostedService.Text = string.Format(formatDeleteHostedService, hostedService.HostedServiceProperties.Label);
    }

    private void btnNo_Click(object sender, System.EventArgs e) {
      this.Close();
    }

    private void btnYes_Click(object sender, System.EventArgs e) {
      SetControlsEnabled(false);
      progressBar.Visible = true;

      var parameters = Tuple.Create<Deployment, HostedService, bool>(deployment, hostedService, cbDeleteHostedService.Checked);
      worker.RunWorkerAsync(parameters);
    }

    private void SetControlsEnabled(bool isEnabled) {
      btnNo.Enabled = isEnabled;
      btnYes.Enabled = isEnabled;
    }

    private void DeleteDeploymentTask(object sender, DoWorkEventArgs e) {
      Tuple<Deployment, HostedService, bool> parameters = e.Argument as Tuple<Deployment, HostedService, bool>;
      Deployment dep = parameters.Item1;
      HostedService hs = parameters.Item2;
      bool DeleteHostedService = parameters.Item3;

      if (DeleteHostedService) {
        Parallel.ForEach(hs.Deployments, d => {
          string requestId = CloudManagerClient.Instance.AzureProvider.DeleteDeployment(hs.Subscription, hs.ServiceName, d.Name);
          Constants.OperationResult result = CloudManagerClient.Instance.AzureProvider.PollGetOperationStatus(hs.Subscription, requestId, 4, 30);
        });
        CloudManagerClient.Instance.AzureProvider.DeleteHostedService(hs.Subscription, hs.ServiceName);
      } else {
        CloudManagerClient.Instance.AzureProvider.DeleteDeployment(hs.Subscription, hs.ServiceName, dep.Name);
      }
    }

    private void WorkerCompleted(object sender, RunWorkerCompletedEventArgs e) {
      progressBar.Visible = false;

      if (e.Error == null) {
        ErrorOccured = false;
        this.Close();
      } else {
        PluginInfrastructure.ErrorHandling.ShowErrorDialog(e.Error);
        ErrorOccured = true;
        this.Show();
        SetControlsEnabled(true);
      }
    }




  }
}