using System.IO;
using UnityEngine;
using System.Linq;

namespace UnityEditor.Graphs.Material
{
	class MaterialGraphGUI : BaseMaterialGraphGUI
	{
		enum SelectedOptions
		{
			properties,
			options
		}

		private PixelGraph GetGraph() {return graph as PixelGraph;}
		public MaterialGraph materialGraph;

		private SelectedOptions m_SelectedGUI = SelectedOptions.properties;

		private static void DrawSpacer()
		{
			var spacerLine = GUILayoutUtility.GetRect(GUIContent.none,
														GUIStyle.none,
														GUILayout.ExpandWidth(true),
														GUILayout.Height(1));
			var oldBgColor = GUI.backgroundColor;
			if (EditorGUIUtility.isProSkin)
				GUI.backgroundColor = oldBgColor * 0.7058f;
			else
				GUI.backgroundColor = Color.black;

			//if (Event.current.type == EventType.Repaint)
			//	EditorGUIUtility.whiteTextureStyle.Draw(spacerLine, GUIContent.none, false, false, false, false);

			GUI.backgroundColor = oldBgColor;
		}

		public void RenderOptions (Rect rect, MaterialGraph graph)
		{
			GUILayout.BeginArea (rect);

			m_SelectedGUI = (SelectedOptions)EditorGUILayout.EnumPopup ("Options?", m_SelectedGUI);

			DrawSpacer ();

			if (m_SelectedGUI == SelectedOptions.properties)
				graph.materialProperties.DoGUI(GetGraph().nodes);
			else if (m_SelectedGUI == SelectedOptions.options)
				graph.materialOptions.DoGUI ();

			GUILayout.FlexibleSpace ();
			if (GUILayout.Button ("Output Shader :)"))
			{
				var templateLocation = Path.Combine( Application.dataPath,
				                       Path.Combine ("MaterialGraph",
				                       "Shader.template"));

				if (File.Exists(templateLocation))
					ShaderGenerator.GenerateSurfaceShader (graph);
			}
			GUILayout.EndArea ();
		}
	}
}