using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using ProjectTracker.Library;

public partial class ProjectEdit : System.Web.UI.Page
{

  private enum Views
  {
    MainView = 0,
    AssignView = 1
  }

  protected void Page_Load(object sender, EventArgs e)
  {
    if (!Page.IsPostBack)
    {
      ApplyAuthorizationRules();
    }
    else
      this.ErrorLabel.Text = string.Empty;
  }

  private void ApplyAuthorizationRules()
  {
    Project obj = GetProject();
    // project display
    if (Project.CanEditObject())
    {
      if (obj.IsNew)
        this.DetailsView1.DefaultMode = DetailsViewMode.Insert;
      else
        this.DetailsView1.DefaultMode = DetailsViewMode.Edit;
      this.AddResourceButton.Visible = !obj.IsNew;
    }
    else
    {
      this.DetailsView1.DefaultMode = DetailsViewMode.ReadOnly;
      this.AddResourceButton.Visible = false;
    }
    this.DetailsView1.Rows[
      this.DetailsView1.Rows.Count - 1].Visible = 
      Project.CanEditObject();

    // resource display
    this.GridView1.Columns[
      this.GridView1.Columns.Count - 1].Visible = 
      Project.CanEditObject();
  }

  #region Project DetailsView

  protected void DetailsView1_ItemCreated(object sender, EventArgs e)
  {
    if (DetailsView1.DefaultMode == DetailsViewMode.Insert)
    {
      Project obj = GetProject();
      ((TextBox)DetailsView1.Rows[1].Cells[1].Controls[0]).Text = obj.Name;
      ((TextBox)DetailsView1.Rows[2].Cells[1].Controls[0]).Text = obj.Started;
      ((TextBox)DetailsView1.Rows[3].Cells[1].Controls[0]).Text = obj.Ended;
      ((TextBox)DetailsView1.FindControl("TextBox1")).Text = obj.Description;
    }
  }

  protected void DetailsView1_ItemInserted(
    object sender, DetailsViewInsertedEventArgs e)
  {
    Project project = GetProject();
    if (!project.IsNew)
      Response.Redirect("ProjectEdit.aspx?id=" + project.Id.ToString());
  }

  protected void DetailsView1_ItemUpdated(
    object sender, DetailsViewUpdatedEventArgs e)
  {
    ApplyAuthorizationRules();
  }

  protected void DetailsView1_ItemDeleted(
    object sender, DetailsViewDeletedEventArgs e)
  {
    Response.Redirect("ProjectList.aspx");
  }

  #endregion

  #region Resource Grid

  protected void AddResourceButton_Click(
    object sender, EventArgs e)
  {
    this.MultiView1.ActiveViewIndex = 
      (int)Views.AssignView;
  }

  protected void GridView2_SelectedIndexChanged(
    object sender, EventArgs e)
  {
    Project obj = GetProject();
    try
    {
      obj.Resources.Assign(int.Parse(
        this.GridView2.SelectedDataKey.Value.ToString()));
      if (SaveProject(obj) > 0)
      {
        this.GridView1.DataBind();
        this.MultiView1.ActiveViewIndex = (int)Views.MainView;
      }
    }
    catch (InvalidOperationException ex)
    {
      ErrorLabel.Text = ex.Message;
    }
  }

  protected void CancelAssignButton_Click(
    object sender, EventArgs e)
  {
    this.MultiView1.ActiveViewIndex = 
      (int)Views.MainView;
  }

  #endregion

  #region ProjectDataSource

  protected void ProjectDataSource_DeleteObject(
    object sender, Csla.Web.DeleteObjectArgs e)
  {
    try
    {
      Project.DeleteProject(new Guid(e.Keys["Id"].ToString()));
      Session["currentObject"] = null;
      e.RowsAffected = 1;
    }
    catch (Csla.DataPortalException ex)
    {
      this.ErrorLabel.Text = ex.BusinessException.Message;
      e.RowsAffected = 0;
    }
    catch (Exception ex)
    {
      this.ErrorLabel.Text = ex.Message;
      e.RowsAffected = 0;
    }
  }

  protected void ProjectDataSource_InsertObject(
    object sender, Csla.Web.InsertObjectArgs e)
  {
    Project obj = GetProject();
    Csla.Data.DataMapper.Map(e.Values, obj, "Id");
    e.RowsAffected = SaveProject(obj);
  }

  protected void ProjectDataSource_SelectObject(
    object sender, Csla.Web.SelectObjectArgs e)
  {
    e.BusinessObject = GetProject();
  }

  protected void ProjectDataSource_UpdateObject(object sender, Csla.Web.UpdateObjectArgs e)
  {
    Project obj = GetProject();
    Csla.Data.DataMapper.Map(e.Values, obj);
    e.RowsAffected = SaveProject(obj);
  }

  #endregion

  #region ResourcesDataSource

  protected void ResourcesDataSource_DeleteObject(
    object sender, Csla.Web.DeleteObjectArgs e)
  {
    Project obj = GetProject();
    int rid = int.Parse(e.Keys["ResourceId"].ToString());
    obj.Resources.Remove(rid);
    e.RowsAffected = SaveProject(obj);
  }

  protected void ResourcesDataSource_SelectObject(
    object sender, Csla.Web.SelectObjectArgs e)
  {
    Project obj = GetProject();
    e.BusinessObject = obj.Resources;
  }

  protected void ResourcesDataSource_UpdateObject(
    object sender, Csla.Web.UpdateObjectArgs e)
  {
    Project obj = GetProject();
    int rid = int.Parse(e.Keys["ResourceId"].ToString());
    ProjectResource res =
      obj.Resources.GetItem(rid);
    Csla.Data.DataMapper.Map(e.Values, res);
    e.RowsAffected = SaveProject(obj);
  }

  #endregion

  #region ResourceListDataSource
  
  protected void ResourceListDataSource_SelectObject(
    object sender, Csla.Web.SelectObjectArgs e)
  {
    e.BusinessObject = 
      ProjectTracker.Library.ResourceList.GetResourceList();
  }

  #endregion

  #region RoleListDataSource

  protected void RoleListDataSource_SelectObject(
    object sender, Csla.Web.SelectObjectArgs e)
  {
    e.BusinessObject = RoleList.GetList();
  }

  #endregion

  private Project GetProject()
  {
    object businessObject = Session["currentObject"];
    if (businessObject == null ||
      !(businessObject is Project))
    {
      try
      {
        string idString = Request.QueryString["id"];
        if (!string.IsNullOrEmpty(idString))
        {
          Guid id = new Guid(idString);
          businessObject = Project.GetProject(id);
        }
        else
          businessObject = Project.NewProject();
        Session["currentObject"] = businessObject;
      }
      catch (System.Security.SecurityException)
      {
        Response.Redirect("ProjectList.aspx");
      }
    }
    return (Project)businessObject;
  }

  private int SaveProject(Project project)
  {
    int rowsAffected;
    try
    {
      Session["currentObject"] = project.Save();
      rowsAffected = 1;
    }
    catch (Csla.Validation.ValidationException ex)
    {
      System.Text.StringBuilder message = new System.Text.StringBuilder();
      message.AppendFormat("{0}<br/>", ex.Message);
      if (project.BrokenRulesCollection.Count == 1)
        message.AppendFormat("* {0}: {1}",
          project.BrokenRulesCollection[0].Property, 
          project.BrokenRulesCollection[0].Description);
      else
        foreach (Csla.Validation.BrokenRule rule in project.BrokenRulesCollection)
          message.AppendFormat("* {0}: {1}<br/>", rule.Property, rule.Description);
      this.ErrorLabel.Text = message.ToString();
      rowsAffected = 0;
    }
    catch (Csla.DataPortalException ex)
    {
      this.ErrorLabel.Text = ex.BusinessException.Message;
      rowsAffected = 0;
    }
    catch (Exception ex)
    {
      this.ErrorLabel.Text = ex.Message;
      rowsAffected = 0;
    }
    return rowsAffected;
  }

}