using UnityEngine;
using System.Collections;
using System.Collections.Generic;

namespace UnityEngine.UI
{
	public class MaterialHelper {
		/// <summary>
		/// Sets the material values.
		/// </summary>
		/// <returns>The material values.</returns>
		/// <param name="info">Values to set.</param>
		/// <param name="baseMaterial">Base material.</param>
		public static Material SetMaterialValues(ProceduralImageMaterialInfo info,Material baseMaterial){
			if (baseMaterial == null) {
				throw new System.ArgumentNullException ("baseMaterial");
			}
			if (baseMaterial.shader.name != "UI/Procedural UI Image"&&baseMaterial.shader.name != "UI/Procedural UI Image Clip") {
				Debug.LogWarning("Parameter 'baseMaterial' does not use shader 'UI/Procedural UI Image'. Method returns baseMaterial.");
				return baseMaterial;
			}
			Material m;
			m = baseMaterial; 
			m.SetFloat("_Width",info.width);
			m.SetFloat("_Height",info.height);
			m.SetFloat ("_PixelWorldScale",info.pixelWorldScale);
			m.SetVector("_Radius",info.radius);
			m.SetFloat("_LineWeight",info.borderWidth);
			return m;
		}
		
	}
	
	/// <summary>
	/// Material info. Contains values of "UI/Procedural UI Image" shader
	/// </summary>
	public struct ProceduralImageMaterialInfo{
		public float width;
		public float height;
		public float pixelWorldScale;
		public Vector4 radius;
		public float borderWidth;
		
		public ProceduralImageMaterialInfo(float width,
		                                   float height,
		                                   float pixelWorldScale,
		                                   Vector4 radius,
		                                   float borderWidth){
			this.width = width;
			this.height = height;
			this.pixelWorldScale = pixelWorldScale;
			this.radius = radius;
			this.borderWidth = borderWidth;
		}
		public override string ToString ()
		{
			return string.Format ("width:{0},height:{1},pws:{2},radius:{3},bw:{4}",width,height,pixelWorldScale,radius,borderWidth);
		}
	}
}