using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Bridge.Html5;
using Bridge.jQuery2;

namespace WebMrbc
{
	internal class MainLoopWorkspace : IClassWorkspace
	{
		internal Workspace workspace;
		BlocklyView view;
		protected Ruby _RubyCode;

		public string Identifier { get { return view.Identifier; } }
		public Workspace Workspace { get { return workspace; } }
		public BlocklyView View { get { return view; } }
		public Ruby RubyCode { get { return _RubyCode; } }

		public MainLoopWorkspace(BlocklyView view)
		{
			this.view = view;
			workspace = view.Init();

			UpdateInitialBlock();
		}

		private void UpdateInitialBlock()
		{
			var xml = Document.CreateElement("xml");
			var vset = Document.CreateElement("block");
			vset.SetAttribute("type", "variables_set");
			xml.AppendChild(vset);

			var field = Document.CreateElement("field");
			field.SetAttribute("name", "VAR");
			field.AppendChild(Document.CreateTextNode("MAKER_CODE"));
			vset.AppendChild(field);

			var value = Document.CreateElement("value");
			value.SetAttribute("name", "VALUE");
			vset.AppendChild(value);

			var text = Document.CreateElement("shadow");
			text.SetAttribute("type", "text");
			value.AppendChild(text);

			field = Document.CreateElement("field");
			field.SetAttribute("name", "TEXT");
			field.AppendChild(Document.CreateTextNode("\\x00\\x00\\xB3"));/* TOPPERSプロジェクト */
			text.AppendChild(field);

			Blockly.Xml.domToWorkspace(xml, Workspace);
		}

		public string GetImageUrl()
		{
			return "img/no_image.png";
		}

		public bool IsPreset()
		{
			return true;
		}

		public string ToCode(string filename)
		{
			if (Collections.EcnlTaskWorkspace == null)
				return "";

			_RubyCode = new Ruby(filename);
			var result = _RubyCode.defineMainLoop(this, Collections.EcnlTaskWorkspace.Identifier);
			view.Changed = false;
			return result;
		}

		//Element ele;

		public void Activate()
		{
			//ele = Blockly.Xml.workspaceToDom(workspace);
		}

		public void Inactivate()
		{
			//workspace.clear();
			//Blockly.Xml.domToWorkspace(ele, workspace);
		}

		public void ReloadToolbox(HTMLElement toolbox)
		{
			toolbox.AppendChild(Document.CreateElement("sep"));
			var xml = jQuery.ParseXML(App.ArduinoToolbox);
			var categories = xml.ChildNodes[0];
			foreach (var item in categories.ChildNodes) {
				if (item.NodeName != "category")
					continue;
				toolbox.AppendChild(item);
			}
		}

		public void OpenModifyView(Action<bool> callback)
		{
			view.ReloadToolbox(this);
			callback(true);
		}

		public string Template(string template)
		{
			template = template.Replace("%identifier%", Identifier);
			template = template.Replace("%attribute%", "MainLoop");
			template = template.Replace("%img%", GetImageUrl());
			return template;
		}
	}

	partial class Ruby
	{
		internal string defineMainLoop(MainLoopWorkspace workspace, string identifier)
		{
			string code = workspaceToCode(workspace.Workspace);
			var sb = new StringBuilder();

			sb.Append(code);
			sb.AppendLine();

			sb.AppendLine($"ctrl = {identifier}.new()");
			sb.AppendLine();
			sb.AppendLine("# メインループ");
			sb.AppendLine("while (true) do");
			sb.AppendLine("	# メッセージ待ち");
			sb.AppendLine("	ret = TargetBoard::wait_msg(ctrl.timer)");
			sb.AppendLine("	if !ret then");
			sb.AppendLine("		break;");
			sb.AppendLine("	end");
			sb.AppendLine();
			sb.AppendLine("	# 経過時間の計算");
			sb.AppendLine("	ctrl.progress ret[0]");
			sb.AppendLine();
			sb.AppendLine("	# 戻り値が２つなら");
			sb.AppendLine("	if ret.length == 2 then");
			sb.AppendLine("		# 内部イベント");
			sb.AppendLine("		case (ret[1])");
			sb.AppendLine("		when 1 then");
			sb.AppendLine("			TargetBoard::restart");
			sb.AppendLine("		when 2 then");
			sb.AppendLine("			ctrl.ntf_inl");
			sb.AppendLine("		end");
			sb.AppendLine("	# 戻り値が３つなら");
			sb.AppendLine("	elsif ret.length == 3 then");
			sb.AppendLine("		# 通信レイヤーからのメッセージ（通信端点と電文）");
			sb.AppendLine("		ctrl.recv_msg(ret[1], ret[2])");
			sb.AppendLine("	end");
			sb.AppendLine();
			sb.AppendLine("	# タイムアウトの処理があれば行う");
			sb.AppendLine("	ctrl.call_timeout");
			sb.AppendLine("end");

			return sb.ToString();
		}
	}
}