#region Using

using System;
using System.Collections.Generic;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.Text.RegularExpressions;
using BlogEngine.Core;

#endregion

public partial class search : BlogEngine.Core.Web.Controls.BlogBasePage
{

  private const int PAGE_SIZE = 20;

  #region Event handlers

  protected void Page_Load(object sender, EventArgs e)
  {
    rep.ItemDataBound += new RepeaterItemEventHandler(rep_ItemDataBound);

    if (!string.IsNullOrEmpty(Request.QueryString["q"]))
    {
      bool includeComments = Request.QueryString["comment"] == "true";
      BindSearchResult(Request.QueryString["q"], includeComments);
      Page.Title = Resources.labels.searchResultsFor + " '" + Request.QueryString["q"] + "'";
      h1Headline.InnerText = Page.Title;
    }
    else
    {
      Page.Title = Resources.labels.search;
      h1Headline.InnerHtml = Resources.labels.search;
    }

    base.AddMetaTag("description", BlogSettings.Instance.Description);
  }

  void rep_ItemDataBound(object sender, RepeaterItemEventArgs e)
  {
    HtmlGenericControl control = (HtmlGenericControl)e.Item.FindControl("type");
    string type = "<strong>Type</strong>: {0}";
    string categories = "<strong>" + Resources.labels.categories + "</strong> : {0}";
    string tags = "<strong>Tags</strong> : {0}";
    string keywords = "<strong>Keywords</strong> : {0}    ";
    if (e.Item.DataItem is Comment)
    {
      control.InnerHtml = string.Format(type, Resources.labels.comment);
    }
    else if (e.Item.DataItem is Post)
    {
      Post post = (Post)e.Item.DataItem;
      string text = string.Format(type, Resources.labels.post);
      if (post.Categories.Count > 0)
      {
        string cat = string.Empty;
        foreach (Category category in post.Categories)
        {
          cat += category.Title + ", ";
        }

        text += "<br />" + string.Format(categories, cat.Substring(0, cat.Length - 2));
      }

      if (post.Tags.Count > 0)
      {
        string t = string.Empty;
        foreach (string tag in post.Tags)
        {
          t += tag + ", ";
        }

        text += "<br />" + string.Format(tags, t.Substring(0, t.Length - 2));
      }

      control.InnerHtml = text;
    }
    else if (e.Item.DataItem is BlogEngine.Core.Page)
    {
      BlogEngine.Core.Page page = (BlogEngine.Core.Page)e.Item.DataItem;
      string text = string.Format(type, Resources.labels.page);

      if (!string.IsNullOrEmpty(page.Keywords))
      {
        text += "<br />" + string.Format(keywords, page.Keywords);
      }

      control.InnerHtml = text;
    }
  }

  #endregion

  #region Data binding

  private void BindSearchResult(string searchTerm, bool includeComments)
  {
    int page = 1;
    if (Request.QueryString["page"] != null)
    {
      page = int.Parse(Request.QueryString["page"]);
    }

    int start = PAGE_SIZE * (page - 1);
    List<IPublishable> list = Search.Hits(searchTerm, includeComments);
    if (start <= list.Count - 1)
    {
      int size = PAGE_SIZE;
      if (start + size > list.Count)
        size = list.Count - start;

      rep.DataSource = list.GetRange(start, size);
      rep.DataBind();
      
      BindPaging(list.Count, page - 1);
    }
  }

	private void BindPaging(int results, int page)
	{
		if (results <= PAGE_SIZE)
			return;

		decimal pages = Math.Ceiling((decimal)results / (decimal)PAGE_SIZE);

		HtmlGenericControl ul = new HtmlGenericControl("ul");
		for (int i = 0; i < pages; i++)
		{
			HtmlGenericControl li = new HtmlGenericControl("li");
			if (i == page)
			{
				li.Attributes.Add("class", "active");
			}

			HtmlAnchor a = new HtmlAnchor();
			a.InnerHtml = (i + 1).ToString();

			string comment = string.Empty;
			if (Request.QueryString["comment"] != null)
			{
				comment = "&amp;comment=true";
			}

			a.HRef = "?q=" + Request.QueryString["q"] + comment + "&amp;page=" + (i + 1);

			li.Controls.Add(a);
			ul.Controls.Add(li);
		}
		Paging.Controls.Add(ul);
	}

  #endregion

  #region Data manipulation

  /// <summary>
  /// Removes the comment anchor from the URL
  /// </summary>
  protected string ShortenUrl(string uri)
  {
    string url = Utils.ConvertToAbsolute(uri).ToString();
    if (!url.Contains("#"))
      return url;

    int index = url.IndexOf("#");
    return url.Substring(0, index);
  }

  /// <summary>
  /// Shortens the content to fit to a search result
  /// </summary>
  protected string GetContent(string description, string content)
  {
    string text = string.Empty;
    if (!string.IsNullOrEmpty(description))
    {
      text = description;
    }
    else
    {
      text = StripHtml(content);
			if (text.Length > 200)
				text = text.Substring(0, 200) + " …";
			text = "“" + text.Trim() + "”";
    }

    return text;
  }

  private static Regex _Regex = new Regex("<[^>]*>", RegexOptions.Compiled);
/// <summary>
/// Removes all HTML tags from a given string
/// </summary>
  private static string StripHtml(string html)
  {
    if (string.IsNullOrEmpty(html))
      return string.Empty;

    return _Regex.Replace(html, string.Empty);
  }

  #endregion

}