using UnityEngine;

namespace UnityEditor.Graphs.Material
{
	public class TextureProperty : ShaderProperty
	{
		[SerializeField] private Texture2D m_DefaultTexture;

		[SerializeField] private TextureType m_DefaultTextureType;

		public Texture2D defaultTexture
		{
			get { return m_DefaultTexture; }
			set { m_DefaultTexture = value; }
		}

		public TextureType defaultTextureType
		{
			get { return m_DefaultTextureType; }
			set { m_DefaultTextureType = value; }
		}

		public override object value
		{
			get { return m_DefaultTexture; }
			set { m_DefaultTexture = value as Texture2D; }
		}

		public override void PropertyOnGUI(out bool nameChanged, out bool valuesChanged)
		{
			base.PropertyOnGUI(out nameChanged, out valuesChanged);
			EditorGUI.BeginChangeCheck();
			m_DefaultTexture = EditorGUILayout.ObjectField("Texture", m_DefaultTexture, typeof (Texture2D), false) as Texture2D;
			valuesChanged |= EditorGUI.EndChangeCheck();
		}

		public override PropertyType propertyType
		{
			get { return PropertyType.Texture2D; }
		}

		public override void GeneratePropertyBlock(PropertyGenerator visitor, GenerationMode generationMode)
		{
			visitor.AddShaderProperty(new TexturePropertyChunk(name, m_PropertyDescription, m_DefaultTexture,
			                                                   m_DefaultTextureType, false));
		}

		public override void GeneratePropertyUsages(ShaderGenerator visitor, GenerationMode generationMode)
		{
			visitor.AddShaderChunk("sampler2D " + name + ";", true);
			visitor.AddShaderChunk("float4 " + name + "_ST;", true);
		}

		public override string GenerateDefaultValue()
		{
			return name;
		}
	}
}