// Copyright (c) Pixel Crushers. All rights reserved.

using UnityEngine;
using UnityEditor;

namespace PixelCrushers
{

    [CustomPropertyDrawer(typeof(HelpBoxAttribute))]
    public class HelpBoxAttributeDrawer : DecoratorDrawer
    {

        public override float GetHeight()
        {
            var helpBoxAttribute = attribute as HelpBoxAttribute;
            if (helpBoxAttribute == null) return base.GetHeight();

            var helpBoxStyle = (GUI.skin != null) ? GUI.skin.GetStyle("helpbox") : null;
            if (helpBoxStyle == null) return base.GetHeight();

            return Mathf.Max(40f, helpBoxStyle.CalcHeight(new GUIContent(helpBoxAttribute.text), EditorGUIUtility.currentViewWidth) + 4);
        }

        public override void OnGUI(Rect position)
        {
            var helpBoxAttribute = attribute as HelpBoxAttribute;
            if (helpBoxAttribute == null) return;
            EditorGUI.HelpBox(position, helpBoxAttribute.text, GetMessageType(helpBoxAttribute.messageType));
        }

        private MessageType GetMessageType(HelpBoxMessageType helpBoxMessageType)
        {
            switch (helpBoxMessageType)
            {
                default:
                case HelpBoxMessageType.None:
                    return MessageType.None;
                case HelpBoxMessageType.Info:
                    return MessageType.Info;
                case HelpBoxMessageType.Warning:
                    return MessageType.Warning;
                case HelpBoxMessageType.Error:
                    return MessageType.Error;
            }
        }

    }
}