using UnityEngine;
using UnityEditor;
using System.Collections;

namespace VolumetricFogAndMist {

	public class VolumetricFogAbout : EditorWindow {
		Texture2D _headerTexture, _blackTexture;
		GUIStyle richLabelStyle;
		GUIStyle blackStyle;

		public static void ShowAboutWindow() {
			float height = 350.0f;
			float width = 515.0f;

			Rect rect = new Rect(Screen.width * 0.5f - width * 0.5f, Screen.height * 0.5f - height * 0.5f, width, height);
			GetWindowWithRect<VolumetricFogAbout>(rect, true, "About Volumetric Fog & Mist", true);
		}


		void OnEnable() {
			Color backColor = EditorGUIUtility.isProSkin ? new Color(0.18f, 0.18f, 0.18f) : new Color(0.7f, 0.7f, 0.7f);
			_blackTexture = MakeTex(4, 4, backColor);
			_blackTexture.hideFlags = HideFlags.DontSave;
			_headerTexture = Resources.Load<Texture2D>("VolumetricHeader");
			blackStyle = new GUIStyle();
			blackStyle.normal.background = _blackTexture;
		}

		void OnGUI() {
			if (richLabelStyle == null) {
				richLabelStyle = new GUIStyle(GUI.skin.label);
				richLabelStyle.richText = true;
				richLabelStyle.wordWrap = true;
			}

			EditorGUILayout.Separator();
			GUI.skin.label.alignment = TextAnchor.MiddleCenter;  
			GUILayout.Label(_headerTexture, GUILayout.ExpandWidth(true));
			GUI.skin.label.alignment = TextAnchor.MiddleLeft;  
			EditorGUILayout.Separator();

			EditorGUILayout.Separator();
			EditorGUILayout.BeginHorizontal();
			GUILayout.Label("<b>Volumetric Fog & Mist</b>\nCopyright (C) by Kronnect", richLabelStyle);
			EditorGUILayout.EndHorizontal();
			EditorGUILayout.Separator();
			GUILayout.Label("Thanks for purchasing!");
			EditorGUILayout.Separator();

			EditorGUILayout.Separator();
			EditorGUILayout.Separator();

			EditorGUILayout.BeginHorizontal();
			if (GUILayout.Button("Support Forum and more assets!", GUILayout.Height(40))) {
				Application.OpenURL("http://kronnect.me");
			}
			if (GUILayout.Button("Rate this Asset", GUILayout.Height(40))) {
				Application.OpenURL("com.unity3d.kharma:content/49858");
			}
			if (GUILayout.Button("Close Window", GUILayout.Height(40))) {
				Close();
			}
			EditorGUILayout.EndHorizontal();
			EditorGUILayout.Separator();

		}

		Texture2D MakeTex(int width, int height, Color col) {
			Color[] pix = new Color[width * height];
			
			for (int i = 0; i < pix.Length; i++)
				pix[i] = col;
			
			Texture2D result = new Texture2D(width, height);
			result.SetPixels(pix);
			result.Apply();
			
			return result;
		}

	
	}

}