/************************************************************************************

Copyright   :   Copyright 2017 Oculus VR, LLC. All Rights reserved.

Licensed under the Oculus VR Rift SDK License Version 3.4.1 (the "License");
you may not use the Oculus VR Rift SDK except in compliance with the License,
which is provided at the time of installation or download, or which
otherwise accompanies this software in either electronic or hard copy form.

You may obtain a copy of the License at

https://developer.oculus.com/licenses/sdk-3.4.1


Unless required by applicable law or agreed to in writing, the Oculus VR SDK
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

************************************************************************************/
using System;
using System.Text;
using UnityEngine;
using UnityEngine.Assertions;


namespace UnityEngine.EventSystems
{
    /// <summary>
    /// Extension of Unity's PointerEventData to support ray based pointing and also touchpad swiping
    /// </summary>
    public class OVRPointerEventData : PointerEventData
    {
        public OVRPointerEventData(EventSystem eventSystem)
            : base(eventSystem)
        {

        }

        public Ray worldSpaceRay;
        public Vector2 swipeStart;

        public override string ToString()
        {
            var sb = new StringBuilder();
            sb.AppendLine("<b>Position</b>: " + position);
            sb.AppendLine("<b>delta</b>: " + delta);
            sb.AppendLine("<b>eligibleForClick</b>: " + eligibleForClick);
            sb.AppendLine("<b>pointerEnter</b>: " + pointerEnter);
            sb.AppendLine("<b>pointerPress</b>: " + pointerPress);
            sb.AppendLine("<b>lastPointerPress</b>: " + lastPress);
            sb.AppendLine("<b>pointerDrag</b>: " + pointerDrag);
            sb.AppendLine("<b>worldSpaceRay</b>: " + worldSpaceRay);
            sb.AppendLine("<b>swipeStart</b>: " + swipeStart);
            sb.AppendLine("<b>Use Drag Threshold</b>: " + useDragThreshold);
            return sb.ToString();
        }
       
    }


    /// <summary>
    /// Static helpers for OVRPointerEventData.
    /// </summary>
    public static class PointerEventDataExtension
    {

        public static bool IsVRPointer(this PointerEventData pointerEventData)
        {
            return (pointerEventData is OVRPointerEventData);  
        }
        public static Ray GetRay(this PointerEventData pointerEventData)
        {
            OVRPointerEventData vrPointerEventData = pointerEventData as OVRPointerEventData;
            Assert.IsNotNull(vrPointerEventData);
            
            return vrPointerEventData.worldSpaceRay;
        }
        public static Vector2 GetSwipeStart(this PointerEventData pointerEventData)
        {
            OVRPointerEventData vrPointerEventData = pointerEventData as OVRPointerEventData;
            Assert.IsNotNull(vrPointerEventData);
            
            return vrPointerEventData.swipeStart;
        }
        public static void SetSwipeStart(this PointerEventData pointerEventData, Vector2 start)
        {
            OVRPointerEventData vrPointerEventData = pointerEventData as OVRPointerEventData;
            Assert.IsNotNull(vrPointerEventData);
            
            vrPointerEventData.swipeStart = start;
        }

        


    }
}
