/*
 * @author Valentin Simonov / http://va.lent.in/
 */

using UnityEngine;
using UnityEditor;
using System.Reflection;

namespace TouchScript.Editor.EditorUI
{
    internal static class GUIElements
    {
		public static GUIStyle Box;
		public static GUIStyle BoxLabel;

		public static GUIStyle HelpBox;
        public static GUIStyle HeaderBox;
		public static GUIStyle HeaderCheckbox;
		public static GUIStyle HeaderFoldout;
        public static GUIStyle SmallText;
		public static GUIStyle SmallTextRight;
        public static GUIStyle SmallButton;

		public static Texture2D PaneOptionsIcon;

        static GUIElements()
        {
			Box = new GUIStyle(GUI.skin.box)
			{
				margin = new RectOffset(0, 0, 1, 0),
				padding = new RectOffset(0, 0, 0, 0),
				contentOffset = new Vector2(0, 0),
				alignment = TextAnchor.MiddleCenter,
			};
			Box.normal.textColor = GUI.skin.label.normal.textColor;

			BoxLabel = new GUIStyle(GUI.skin.label)
			{
				fontSize = 9,
				padding = new RectOffset(0, 0, 5, 0),
			};

			HelpBox = new GUIStyle("HelpBox")
			{
				wordWrap = true,
			};

			HeaderBox = new GUIStyle("ShurikenModuleTitle")
			{
				font = (new GUIStyle("Label")).font,
				border = new RectOffset(15, 7, 4, 4),
				fixedHeight = 22,
				contentOffset = new Vector2(20f, -2f),
			};

			HeaderCheckbox = new GUIStyle("ShurikenCheckMark");
			HeaderFoldout = new GUIStyle("Foldout");

			SmallText = new GUIStyle("miniLabel")
			{
				alignment = TextAnchor.UpperLeft,
			};

			SmallTextRight = new GUIStyle("miniLabel")
			{
				alignment = TextAnchor.UpperRight,
			};

			SmallButton = new GUIStyle("Button")
			{
				fontSize = SmallText.fontSize,
				fontStyle = SmallText.fontStyle,
				font = SmallText.font,
			};

			if (EditorGUIUtility.isProSkin)
				PaneOptionsIcon = (Texture2D)EditorGUIUtility.LoadRequired("Builtin Skins/DarkSkin/Images/pane options.png");
			else
				PaneOptionsIcon = (Texture2D)EditorGUIUtility.LoadRequired("Builtin Skins/LightSkin/Images/pane options.png");
        }

		public static bool Header(GUIContent title, SerializedProperty expanded, SerializedProperty enabled = null, PropertyInfo enabledProp = null)
		{
			var rect = GUILayoutUtility.GetRect(16f, 22f, HeaderBox);
			GUI.Box(rect, title, HeaderBox);

			var display = expanded == null || expanded.isExpanded;

			var foldoutRect = new Rect(rect.x + 4f, rect.y + 3f, 13f, 13f);
			var e = Event.current;

			if (e.type == EventType.Repaint)
			{
				if (enabled == null) HeaderFoldout.Draw(foldoutRect, false, false, display, false);
				else HeaderCheckbox.Draw(foldoutRect, false, false, enabled.boolValue, false);
			}

			if (e.type == EventType.MouseDown)
			{
				if (enabled != null)
				{
					const float kOffset = 2f;
					foldoutRect.x -= kOffset;
					foldoutRect.y -= kOffset;
					foldoutRect.width += kOffset * 2f;
					foldoutRect.height += kOffset * 2f;

					if (foldoutRect.Contains(e.mousePosition))
					{
						enabled.boolValue = !enabled.boolValue;
						if (enabledProp != null) enabledProp.SetValue(enabled.serializedObject.targetObject, enabled.boolValue, null);
						e.Use();
						return display;
					}
				}
				if (rect.Contains(e.mousePosition))
				{
					display = !display;
					expanded.isExpanded = !expanded.isExpanded;
					e.Use();
				}
			}

			return display;
		}

        public static bool BasicHelpBox(GUIContent text)
        {
            EditorGUILayout.LabelField(text, HelpBox);
            var rect = GUILayoutUtility.GetRect(10, 22, GUILayout.ExpandWidth(true));
            rect.x = rect.width - 86;
            rect.width = 100;
            rect.height = 14;
            return GUI.Button(rect, "Switch to Advanced", SmallButton);
        }
    }
}