using System.Xml;
using MBS.Web.UI.HtmlControls;

namespace MBS.Web.UI;

public class WebPage : Control
{
	public bool MobileFriendly { get; set; } = true;

	public WebPage(Dictionary<string, string>? pathVariables = null) : base(pathVariables) { }

	public IList<Control> HeaderControls { get; set; } = new List<Control>();
	public IList<Control> Controls { get; set; } = new List<Control>();

	public WebStyleSheet.WebStyleSheetCollection StyleSheets { get; } = new WebStyleSheet.WebStyleSheetCollection();

	public string Title { get; set; } = "";

	private bool ChildControlsCreated { get; set; } = false;
	protected virtual void CreateChildControls()
	{
	}

	protected override void PersistentInitializeInternal()
	{
		base.PersistentInitializeInternal();
		
		Controls.Clear();
		CreateChildControls();
		
		/*
		if (!ChildControlsCreated)
		{
			CreateChildControls();
			ChildControlsCreated = true;
		}
		*/
	}

	protected virtual IEnumerable<Control> GetHeaderControls()
	{
		return new Control[0];
	}

	protected override string TagName => "html";
	protected override void RenderBeginTag(XmlWriter writer)
	{
		EnsureInitialized();
		writer.WriteStartElement(TagName, "http://www.w3.org/1999/xhtml");

		writer.WriteStartElement("head");
		writer.WriteElementString("title", Title);

		if (MobileFriendly)
		{
			writer.WriteStartElement("meta");
			writer.WriteAttributeString("name", "viewport");
			writer.WriteAttributeString("content", "width=device-width, initial-scale=1.0");
			writer.WriteEndElement();
		}

		List<Control> ctls = new List<Control>();
		
		IEnumerable<Control> headerCtls = GetHeaderControls();
		ctls.AddRange(headerCtls);

		foreach (WebStyleSheet ss in StyleSheets)
		{
			if (ss.FileName != null)
			{
				ctls.Add(new HtmlLink("stylesheet", ss.ContentType, ss.FileName));
			}
			else if (ss.Content != null)
			{
				ctls.Add(new HtmlGenericControl("style", new KeyValuePair<string, string>[] { new KeyValuePair<string, string>("type", ss.ContentType) }, null, ss.Content));
			}
		}

		foreach (Control control in ctls)
		{
			control.Context = Context;
			control.Render(writer);
		}

		writer.WriteEndElement();

		writer.WriteStartElement("body");
		
		List<string> styleClasses = GetStyleClasses().ToList();
		if (styleClasses.Count > 0)
		{
			writer.WriteStartAttribute("class");
			for (int i = 0; i < styleClasses.Count; i++)
			{
				writer.WriteValue(styleClasses[i]);
				if (i < styleClasses.Count - 1)
				{
					writer.WriteValue(" ");
				}
			}
			writer.WriteEndAttribute();
		}
		
		writer.WriteStartElement("form");
		writer.WriteAttributeString("method", "POST");
	}

	protected override void RenderContents(XmlWriter writer)
	{
		foreach (Control control in Controls)
		{
			control.Context = Context;
			control.Render(writer);
		}
	}
	protected override void RenderEndTag(XmlWriter writer)
	{
		base.RenderEndTag(writer);
		writer.WriteEndElement();

		writer.WriteEndElement();
	}
}