using System;
using System.Collections.Generic;
using System.Web.UI;
using System.Web.UI.WebControls;
using umbraco;
using umbraco.cms.businesslogic.datatype;

[assembly: WebResource("umbraco.editorControls.MultipleTextstring.MultipleTextstring.css", "text/css")]
[assembly: WebResource("umbraco.editorControls.MultipleTextstring.MultipleTextstring.js", "application/x-javascript")]

namespace umbraco.editorControls.MultipleTextstring
{
	/// <summary>
	/// The MultipleTextstring control sets a character limit on a TextBox.
	/// </summary>
	[ValidationProperty("IsValid")]
	public class MultipleTextstringControl : PlaceHolder
	{
		/// <summary>
		/// Field for the list of values.
		/// </summary>
		private List<string> values;

		/// <summary>
		/// The HiddenField to store the selected values.
		/// </summary>
		private HiddenField SelectedValues = new HiddenField();

		/// <summary>
		/// Gets or sets the options.
		/// </summary>
		/// <value>The options.</value>
		public MultipleTextstringOptions Options { get; set; }

		/// <summary>
		/// Gets the value of IsValid.
		/// </summary>
		/// <value>Returns 'Valid' if valid, otherwise an empty string.</value>
		public string IsValid
		{
			get
			{
				if (!string.IsNullOrEmpty(this.Values))
				{
					return "Valid";
				}

				return string.Empty;
			}
		}

		/// <summary>
		/// Gets or sets the values.
		/// </summary>
		/// <value>The values.</value>
		public string Values
		{
			get
			{
				return this.SelectedValues.Value;
			}

			set
			{
				this.SelectedValues.Value = value;
			}
		}

		/// <summary>
		/// Initialize the control, make sure children are created
		/// </summary>
		/// <param name="e">An <see cref="T:System.EventArgs"/> object that contains the event data.</param>
		protected override void OnInit(EventArgs e)
		{
			base.OnInit(e);

			this.EnsureChildControls();
		}

		/// <summary>
		/// Add the resources (sytles/scripts)
		/// </summary>
		/// <param name="e">The <see cref="T:System.EventArgs"/> object that contains the event data.</param>
		protected override void OnLoad(EventArgs e)
		{
			base.OnLoad(e);

			// Adds the client dependencies.
			this.AddResourceToClientDependency("umbraco.editorControls.MultipleTextstring.MultipleTextstring.css", ClientDependencyType.Css);
			this.AddResourceToClientDependency("umbraco.editorControls.MultipleTextstring.MultipleTextstring.js", ClientDependencyType.Javascript);
		}

		/// <summary>
		/// Raises the <see cref="E:System.Web.UI.Control.PreRender"/> event.
		/// </summary>
		/// <param name="e">An <see cref="T:System.EventArgs"/> object that contains the event data.</param>
		protected override void OnPreRender(EventArgs e)
		{
			base.OnPreRender(e);

			// initalise the string array/list.
			this.values = new List<string>();

			// load the values into a string array/list.
			if (!string.IsNullOrEmpty(this.Values))
			{
				this.values.AddRange(this.Values.Split(new[] { Environment.NewLine }, StringSplitOptions.None));
			}

			// check the minimum number allowed, add extra fields.
			if (this.values.Count < this.Options.Minimum && this.Options.Minimum > 1)
			{
				this.values.AddRange(new string(',', this.Options.Minimum - 1).Split(new[] { ',' }, StringSplitOptions.None));
			}

			// check the maxmimum number allowed, remove the excess.
			if (this.values.Count > this.Options.Maximum && this.Options.Maximum > 0)
			{
				this.values.RemoveRange(this.Options.Maximum, this.values.Count - this.Options.Maximum);
			}

			// if there are no selected values...
			if (this.values.Count == 0)
			{
				// ... then add an empty string to display a single textstring box.
				this.values.Add(string.Empty);
			}
		}

		/// <summary>
		/// Called by the ASP.NET page framework to notify server controls that use composition-based implementation to create any child controls they contain in preparation for posting back or rendering.
		/// </summary>
		protected override void CreateChildControls()
		{
			base.CreateChildControls();

			this.EnsureChildControls();

			// populate the control's attributes.
			this.SelectedValues.ID = this.SelectedValues.ClientID;

			// add the controls.
			this.Controls.Add(this.SelectedValues);
		}

		/// <summary>
		/// Sends server control content to a provided <see cref="T:System.Web.UI.HtmlTextWriter"/> object, which writes the content to be rendered on the client.
		/// </summary>
		/// <param name="writer">The <see cref="T:System.Web.UI.HtmlTextWriter"/> object that receives the server control content.</param>
		protected override void Render(HtmlTextWriter writer)
		{
			writer.AddAttribute(HtmlTextWriterAttribute.Class, "MultipleTextstring");
			writer.AddAttribute(HtmlTextWriterAttribute.Id, this.ClientID);
			writer.RenderBeginTag(HtmlTextWriterTag.Div);

			// loop through each value
			foreach (string value in this.values)
			{
				writer.AddAttribute(HtmlTextWriterAttribute.Class, "textstring-row");
				writer.RenderBeginTag(HtmlTextWriterTag.Div);

				// input tag
				writer.AddAttribute(HtmlTextWriterAttribute.Class, "textstring-row-field");
				writer.RenderBeginTag(HtmlTextWriterTag.Div);
				writer.WriteLine("<input type='text' class='umbEditorTextField' value='{0}' />", value.Replace("'", "&#39;"));

				// append the add/remove buttons
				writer.WriteLine(" <a href='#add' class='add_row' title='Add a new row'><img src='{0}/images/small_plus.png' /></a>", GlobalSettings.Path);
				writer.WriteLine(" <a href='#remove' class='remove_row' title='Remove this row'><img src='{0}/images/small_minus.png' /></a>", GlobalSettings.Path);
				writer.RenderEndTag(); // </div> .textstring-row-field

				writer.WriteLine("<div class='textstring-row-sort' title='Re-order this row' style='background: url({0}/images/sort.png) no-repeat 0 2px;'></div>", GlobalSettings.Path);

				writer.RenderEndTag(); // </div> .textstring-row
			}

			this.SelectedValues.RenderControl(writer);

			writer.RenderEndTag(); // </div> .MultipleTextstring

			// add jquery window load event
			var javascriptMethod = string.Format("jQuery('#{0}').MultipleTextstring('#{1}', {2}, {3});", this.ClientID, this.SelectedValues.ClientID, this.Options.Minimum, this.Options.Maximum);
			var javascript = string.Concat("<script type='text/javascript'>jQuery(window).load(function(){", javascriptMethod, "});</script>");
			writer.WriteLine(javascript);
		}
	}
}