using System;

using System.Web.UI.WebControls;

using Graffiti.Core;

using Repeater = Graffiti.Core.Repeater;



public partial class graffiti_admin_categories_Default : ManagerControlPanelPage

{

	private CategoryCollection cats;



	private int currentChildIndex;

	// this will hold what child we are on so we know which img to display in the hierarchical view



	protected void Page_Load(object sender, EventArgs e)

	{

		if (!IsPostBack)

		{

			Util.CanWriteRedirect(Context);

		}



		if (Request.QueryString["id"] != null)

		{

			if (!IsPostBack)

			{

				Category c = new Category(Request.QueryString["id"]);



				if (!c.IsLoaded || c.IsNew)

					throw new Exception("This category id does not exist");



				if (Request.QueryString["new"] != null && !IsPostBack)

				{

					Message.Text = "The category <strong>" + c.Name + "</strong> was created";

					Message.Type = StatusType.Success;

				}



				txtExistingCategory.Text = Server.HtmlDecode(c.Name);

				txtFeedBurner.Text = c.FeedUrlOverride;

				Editor.Text = c.Body;

				txtKeywords.Text = Server.HtmlDecode(c.MetaKeywords ?? string.Empty);

				txtMetaScription.Text = Server.HtmlDecode(c.MetaDescription ?? string.Empty);

				SortOrder.SelectedValue = c.SortOrder.ToString();



				txtExistingLinkName.Text = Util.CleanForUrl(c.FormattedName).Replace("-", " ");

				if (c.ParentId > 0)

				{

					Category parent = new CategoryController().GetCachedCategory(c.ParentId, false);

					existingParentLinkName.Text = parent.LinkName + "/ ";

				}

			}



			new_category_container.Visible = false;

			Category_List.Visible = false;

			category_edit_form.Visible = true;

		}

		else

		{

			if (!IsPostBack)

			{

				CategoryCollection parents = new CategoryController().GetTopLevelCachedCategories();



				foreach (Category parent in parents)

				{

					Parent_Categories.Items.Add(new ListItem(Server.HtmlDecode(parent.Name), parent.Id.ToString()));

				}





				Parent_Categories.Items.Insert(0, new ListItem("[No parent category]", "-1"));



				if (Request.QueryString["upd"] != null)

				{

					Message.Text = "The category <strong>" + Request.QueryString["upd"] + "</strong> was updated";

					Message.Type = StatusType.Success;

				}

			}

			new_category_container.Visible = true;

			category_edit_form.Visible = false;

			Category_List.Visible = true;



			GetCategories();

		}

	}



	protected void EditCategory_Click(object sender, EventArgs e)

	{

		try

		{

			Category c = new Category(Request.QueryString["id"]);

			c.Name = Server.HtmlEncode(txtExistingCategory.Text.Trim());

			c.FormattedName = txtExistingLinkName.Text.Trim();

			c.Body = Editor.Text;

			c.FeedUrlOverride = txtFeedBurner.Text;

			c.MetaDescription = Server.HtmlEncode(txtMetaScription.Text.Trim());

			c.MetaKeywords = Server.HtmlEncode(txtKeywords.Text.Trim());

			c.SortOrder = (SortOrderType) Enum.Parse(typeof (SortOrderType), SortOrder.SelectedValue, true);

			c.Save();



			Response.Redirect("~/graffiti-admin/categories/?upd=" + c.Name);

		}

		catch (Exception ex)

		{

			string exMessage = ex.Message;

			if (!string.IsNullOrEmpty(exMessage) && exMessage.IndexOf("UNIQUE") > -1)

				exMessage = "This category already exists";



			Message.Text = "A category with the name of " + txtExistingCategory.Text + " could not be created <br />" +

			               exMessage;

			Message.Type = StatusType.Error;

		}

	}



	protected void CreateCategory_Click(object sender, EventArgs e)

	{

		try

		{

			Category c = new Category();

			c.Name = Server.HtmlEncode(txtCategory.Text.Trim());

			c.ParentId = Int32.Parse(Parent_Categories.SelectedValue);



			c.Save();

			Response.Redirect("~/graffiti-admin/categories/?id=" + c.Id + "&new=true");

		}

		catch (Exception ex)

		{

			string exMessage = ex.Message;

			if (!string.IsNullOrEmpty(exMessage) && exMessage.IndexOf("UNIQUE") > -1)

				exMessage = "This category already exists";



			Message.Text = "A category with the name of " + txtCategory.Text + " could not be created <br />" +

			               exMessage;

			Message.Type = StatusType.Error;

		}

	}



	private void GetCategories()

	{

		cats = new CategoryController().GetCachedCategories();



		var parents = cats.FindAll(

			delegate(Category c) { return c.ParentId >= 0; });



		if (cats != null && cats.Count > 0)

		{

			Category_List.Visible = true;





			CategoryCollection source = new CategoryController().GetTopLevelCachedCategories();

			source.Sort(

				delegate(Category c, Category c1) { return c.Name.CompareTo(c1.Name); });



			Categories_List.DataSource = source;

			Categories_List.ItemDataBound += Categories_List_ItemDataBound;

			Categories_List.DataBind();

		}

		else

		{

			Category_List.Visible = false;

		}

	}



	protected void Categories_List_ItemDataBound(object sender, RepeaterItemEventArgs e)

	{

		if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)

		{

			Category cat = (Category) e.Item.DataItem;



			var children = cats.FindAll(

				delegate(Category c) { return c.ParentId == cat.Id; });

			if (children != null && children.Count > 0)

			{

				// reset the child index counter

				currentChildIndex = 0;



				Repeater c = (Repeater) e.Item.FindControl("NestedCategoriesList");

				c.ItemDataBound += NestedCategoriesList_ItemDataBound;

				c.DataSource = children;

				c.DataBind();

			}

		}

	}



	protected void NestedCategoriesList_ItemDataBound(object sender, RepeaterItemEventArgs e)

	{

		if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)

		{

			// increment the child index counter

			++currentChildIndex;



			Category cat = (Category) e.Item.DataItem;



			// how many children are there?

			var children = cats.FindAll(

				delegate(Category c) { return c.ParentId == cat.ParentId; });



			if (children != null && children.Count > 0)

			{

				Image img = (Image) e.Item.FindControl("TreeImage");



				if (currentChildIndex < children.Count)

					img.ImageUrl = ResolveUrl("~/graffiti-admin/common/img/m.gif");

				else

					img.ImageUrl = ResolveUrl("~/graffiti-admin/common/img/b.gif");

			}

		}

	}



	protected void lbDelete_Command(object sender, CommandEventArgs args)

	{

		int id = Convert.ToInt32(args.CommandArgument);

		Category c = new Category(id);



		if (c.HasChildren)

		{

			Message.Text = "You cannot delete this category because it has child categories.";

			Message.Type = StatusType.Error;

			return;

		}



		var postCounts = Post.GetPostCounts(id, null);



		if (postCounts != null && postCounts.Count > 0)

		{

			int totalPosts = 0;

			foreach (PostCount p in postCounts)

				totalPosts += p.Count;



			if (totalPosts == 1)

			{

				Message.Text = "You cannot delete this category because it is in use by " + totalPosts + " post.";

				Message.Text += " <a href=\"" + ResolveUrl("~/graffiti-admin/posts/?category=") + id +

				                "\">Click here</a> to change this post to another category or delete it.";

				Message.Type = StatusType.Error;

			}

			else

			{

				Message.Text = "You cannot delete this category because it is in use by " + totalPosts + " posts.";

				Message.Text += " <a href=\"" + ResolveUrl("~/graffiti-admin/posts/?category=") + id +

				                "\">Click here</a> to change these posts to another category or delete them.";

				Message.Type = StatusType.Error;

			}

			return;

		}



		try

		{

			// destroy any deleted posts in this category

			Post.DestroyDeletedPostCascadingForCategory(id);



			Category.Destroy(Category.Columns.Id, id);



			NavigationSettings navSettings = NavigationSettings.Get();

			DynamicNavigationItem item = navSettings.Items == null

				                             ? null

				                             : navSettings.Items.Find(

					                             delegate(DynamicNavigationItem itm) { return itm.CategoryId == id; });



			if (item != null)

				NavigationSettings.Remove(item.Id);



			CategoryController.Reset();

			GetCategories();



			Message.Text = "The category " + c.Name + " was deleted.";

		}

		catch (Exception ex)

		{

			Message.Text = ex.Message;

			Message.Type = StatusType.Error;

		}

	}

}