using System;
using System.Windows.Forms;
using HeuristicLab.Clients.Hive.CloudManager.Model;
using HeuristicLab.Core.Views;
using HeuristicLab.MainForm;

namespace HeuristicLab.Clients.Hive.CloudManager.Views {
  [View("DeploymentView")]
  [Content(typeof(Deployment), IsDefaultView = true)]
  public partial class DeploymentView : ItemView {
    private const string SaveChangesString = "Save changes to take effect.";
    public new Deployment Content {
      get { return (Deployment)base.Content; }
      set { base.Content = value; }
    }

    public DeploymentView() {
      InitializeComponent();
    }

    protected override void DeregisterContentEvents() {
      base.DeregisterContentEvents();
    }
    protected override void RegisterContentEvents() {
      base.RegisterContentEvents();
    }

    protected override void OnContentChanged() {
      if (Content == null) {
        txtDeploymentName.Clear();
        txtDeploymentSlot.Clear();
        txtDeploymentStatus.Clear();
        txtCoresUsed.Clear();
      } else {
        txtDeploymentName.Text = Content.Label;
        txtDeploymentSlot.Text = Content.DeploymentSlot;
        txtDeploymentStatus.Text = Content.Status;
        if (Content.RoleInstanceList != null) {
          txtInstanceCount.Text = Content.RoleInstanceList.Count.ToString();
          if (Content.RoleInstanceList.Count > 0) {
            txtInstanceSize.Text = Content.RoleInstanceList[0].InstanceSize;
          }
        } else {
          txtInstanceCount.Text = "";
          txtInstanceSize.Text = "";
        }


        tbChangeCores.Minimum = 1;
        tbChangeCores.Maximum = Content.Subscription.MaxCoreCount;
        if (Content.Modified) {
          tbChangeCores.Value = Content.NewInstanceCount;
          lblChanges.Text = SaveChangesString;
        } else {
          if (Content.RoleInstanceList == null) {
            tbChangeCores.Value = tbChangeCores.Minimum;
          } else {
            tbChangeCores.Value = Content.RoleInstanceList.Count;
          }
          lblChanges.Text = "";
        }

        txtCoresUsed.Text = (tbChangeCores.Value * GetCoresFromInstanceSize(txtInstanceSize.Text)).ToString();

      }
    }

    private void tbChangeCores_Scroll(object sender, System.EventArgs e) {
      int tbValue = tbChangeCores.Value;
      int size = GetCoresFromInstanceSize(txtInstanceSize.Text);
      txtInstanceCount.Text = tbValue.ToString();
      int cores = tbValue * (int)size;
      txtCoresUsed.Text = cores.ToString();

      if (Content.RoleInstanceList.Count != tbValue) {
        Content.Modified = true;
        lblChanges.Text = SaveChangesString;
      } else {
        Content.Modified = false;
        lblChanges.Text = string.Empty;
      }

      Content.NewInstanceCount = tbValue;
    }

    private int GetCoresFromInstanceSize(string instanceSize) {
      if (instanceSize != string.Empty) {
        HeuristicLab.Clients.Hive.CloudManager.Azure.Constants.InstanceSize size =
         (HeuristicLab.Clients.Hive.CloudManager.Azure.Constants.InstanceSize)Enum.Parse(
           typeof(HeuristicLab.Clients.Hive.CloudManager.Azure.Constants.InstanceSize),
           instanceSize,
           true);
        return (int)size;
      } else {
        return 0;
      }

    }
  }
}