/******************************************************************************
 * Copyright (C) Ultraleap, Inc. 2011-2021.                                   *
 *                                                                            *
 * Use subject to the terms of the Apache License 2.0 available at            *
 * http://www.apache.org/licenses/LICENSE-2.0, or another agreement           *
 * between Ultraleap and you, your company or other organization.             *
 ******************************************************************************/

using UnityEngine;
#if UNITY_EDITOR
using UnityEditor;
#endif
using System.Collections.Generic;

namespace Leap.Unity.Attributes
{

    public class MinMax : CombinablePropertyAttribute, IFullPropertyDrawer
    {
        public const float PERCENT_NUM = 0.2f;
        public const float SPACING = 3;

        public readonly float min, max;
        public readonly bool isInt;

        public MinMax(float min, float max)
        {
            this.min = min;
            this.max = max;
            isInt = false;
        }

        public MinMax(int min, int max)
        {
            this.min = min;
            this.max = max;
            isInt = true;
        }

#if UNITY_EDITOR
        public void DrawProperty(Rect rect, SerializedProperty property, GUIContent label)
        {
            EditorGUI.BeginProperty(rect, label, property);

            Vector2 value = property.vector2Value;

            rect = EditorGUI.PrefixLabel(rect, GUIUtility.GetControlID(FocusType.Passive), label);

            int prevIndent = EditorGUI.indentLevel;
            EditorGUI.indentLevel = 0;

            float w = rect.width * PERCENT_NUM;

            Rect leftNum = new Rect(rect.x, rect.y, w, rect.height);
            Rect slider = new Rect(rect.x + w + SPACING, rect.y, rect.width - 2 * w - SPACING * 2, rect.height);
            Rect rightNum = new Rect(rect.x + rect.width - w, rect.y, w, rect.height);

            float newMin = EditorGUI.FloatField(leftNum, value.x);
            float newMax = EditorGUI.FloatField(rightNum, value.y);

            value.x = Mathf.Clamp(newMin, min, value.y);
            value.y = Mathf.Clamp(newMax, value.x, max);

            EditorGUI.MinMaxSlider(slider, ref value.x, ref value.y, min, max);

            property.vector2Value = value;

            EditorGUI.EndProperty();

            EditorGUI.indentLevel = prevIndent;
        }

        public override IEnumerable<SerializedPropertyType> SupportedTypes
        {
            get
            {
                yield return SerializedPropertyType.Vector2;
            }
        }
#endif
    }
}