namespace assetBundleUtility
{


	using System;

	using UnityEditor;
	using UnityEngine;
	
	[CustomPropertyDrawer(typeof(AssetBundleGroup))]
	public class AssetBundleGroupDrawer : PropertyDrawer
	{
	    #region Config
	
	    private float LineSpan = 2;
	    private float LineHeight = 16;
	    private float ButtonSpan = 4;
	    private float ButtonHeight = 32;
	
	    private AssetBundleGroup Instance;
	    private SerializedProperty MD5FileName;
	    private SerializedProperty MD5DictionaryFileName;
	    private SerializedProperty OutputPath;
	    private SerializedProperty AssetBundleSets;
	
	    #endregion
	
	    public override float GetPropertyHeight(SerializedProperty property, GUIContent label)
	    {
	        Instance = (AssetBundleGroup)InstanceUtility.GetObject(fieldInfo, property);

	        return Instance.TotalHeight;
        }
	
	    public override void OnGUI(Rect position, SerializedProperty property, GUIContent label)
	    {
	        Instance = (AssetBundleGroup) InstanceUtility.GetObject(fieldInfo, property);
	        MD5FileName = property.FindPropertyRelative("MD5FileName");
	        MD5DictionaryFileName = property.FindPropertyRelative("MD5DictionaryFileName");
	        OutputPath = property.FindPropertyRelative("OutputPath");
	        AssetBundleSets = property.FindPropertyRelative("AssetBundleSets");
	
	        float originY = position.y;
	
	        position.height = LineHeight;
	
	        EditorGUI.indentLevel++;
	        position = DrawProperty(position, MD5FileName);
	        position = DrawProperty(position, MD5DictionaryFileName);
	        position = DrawProperty(position, OutputPath);
	        position = DrawPropertys(position, AssetBundleSets);
	        position = DrawButton(position, "Create MD5File And MD5DictionaryFile", Instance.CreateMD5FileAndMD5DictionaryFile);
	
	        Instance.TotalHeight = position.y - originY;
        }
	
	    private Rect DrawButton(Rect position, string name, Action OnClick)
	    {
	        Rect contentPosition = position;
	        contentPosition.height = ButtonHeight;
	        if (GUI.Button(contentPosition, name))
	        {
	            OnClick.Invoke();
	        }
	        position.y += ButtonHeight + ButtonSpan;
	        return position;
	    }
	
	    private Rect DrawProperty(Rect position, SerializedProperty property)
	    {
	        Rect contentPosition = position;
	        contentPosition.height = LineHeight;
	        contentPosition = EditorGUI.PrefixLabel(contentPosition, new GUIContent(property.displayName));
	        EditorGUI.PropertyField(contentPosition, property, GUIContent.none);
	        position.y += LineHeight + LineSpan;
	        return position;
	    }
	
	    private Rect DrawPropertys(Rect position, SerializedProperty property)
	    {
	        Rect contentPosition = position;
	        contentPosition.height = LineHeight;
	        contentPosition = EditorGUI.PrefixLabel(contentPosition, new GUIContent(property.displayName));
	        EditorGUI.PropertyField(contentPosition, property, GUIContent.none, true);
	        if (property.isExpanded)
	        {
	            position.y += (LineHeight + LineSpan) * (property.arraySize + 2);
                position.y += (LineHeight + LineSpan) * (2 * property.arraySize); //todo
            }
	        else
	        {
	            position.y += LineHeight + LineSpan;
	        }
	        return position;
	    }
	}


}