using System;
using UnityEngine;

namespace UnityEditor.Graphs.Material
{
	[CustomEditor(typeof(BaseMaterialNode), true)]
	class BaseMaterialNodeEditor : Editor
	{
		public override void OnInspectorGUI()
		{
			var node = target as BaseMaterialNode;
			if (node == null)
				return;

			var slots = node.slots.ToArray();

			EditorGUILayout.LabelField ("Preview Mode: " + node.previewMode);

			foreach (var slot in slots)
				DoSlotUI (node, slot);
		}

		/*private bool DoDefaultInspectorUI ()
		{
			EditorGUIUtility.LookLikeInspector();

			EditorGUI.BeginChangeCheck ();
			serializedObject.Update();

			bool materialSlotsFound = serializedObject.FindProperty("m_SlotDefaultValues") != null;
			SerializedProperty property = serializedObject.GetIterator ();
			bool expanded = true;
			
			while (property.NextVisible (expanded))
			{
				expanded = false;
				if (materialSlotsFound && (property.type == "Slot" || property.name == "m_SlotPropertiesIndexes" || property.name == "m_SlotProperties"))
					continue;
				EditorGUILayout.PropertyField (property, true);
			}

			serializedObject.ApplyModifiedProperties ();
			EditorGUI.EndChangeCheck ();

			return materialSlotsFound;
		}
		*/
		private void DoSlotUI (BaseMaterialNode node, Slot slot)
		{
			GUILayout.BeginHorizontal (/*EditorStyles.inspectorBig*/);
			GUILayout.BeginVertical();
			GUILayout.BeginHorizontal();
			GUILayout.Label ("Slot " + slot.title, EditorStyles.largeLabel);
			GUILayout.FlexibleSpace();
			GUILayout.EndHorizontal ();
			GUILayout.EndVertical ();
			GUILayout.EndHorizontal ();

			DoMaterialSlotUIBody (node, slot);
		}

		private static void DoMaterialSlotUIBody(BaseMaterialNode node, Slot slot)
		{
			SlotDefaultValue defaultValue = node.GetSlotDefaultValue (slot.name);
			if (defaultValue == null)
				return;

			if (defaultValue.editable)
				slot.title = EditorGUILayout.TextField ("Title", slot.title);

			var def = node.GetSlotDefaultValue (slot.name);
			if (def != null)
			{
				if (def.OnGUI())
				{
					node.UpdatePreviewProperties ();

				}
			}
		}

		private static void RemoveSlot (BaseMaterialNode node, Slot slot)
		{
			node.RemoveSlot (slot);
		}
	}
}