// Animancer // https://kybernetik.com.au/animancer // Copyright 2018-2024 Kybernetik //

using UnityEngine;

namespace Animancer
{
    /// <summary>An object with an <see cref="AverageAngularSpeed"/> and <see cref="AverageVelocity"/>.</summary>
    /// https://kybernetik.com.au/animancer/api/Animancer/IMotion
    /// 
    public interface IMotion
    {
        /************************************************************************************************************************/

        /// <summary>The initial <see cref="Motion.averageAngularSpeed"/> that the created state will have.</summary>
        /// <remarks>The actual average can vary in states like <see cref="ManualMixerState"/>.</remarks>
        float AverageAngularSpeed { get; }

        /// <summary>The initial <see cref="Motion.averageSpeed"/> that the created state will have.</summary>
        /// <remarks>The actual average can vary in states like <see cref="ManualMixerState"/>.</remarks>
        Vector3 AverageVelocity { get; }

        /************************************************************************************************************************/
    }

    /// https://kybernetik.com.au/animancer/api/Animancer/AnimancerUtilities
    public static partial class AnimancerUtilities
    {
        /************************************************************************************************************************/

        /// <summary>Outputs the <see cref="Motion.averageAngularSpeed"/> or <see cref="IMotion.AverageAngularSpeed"/>.</summary>
        /// <remarks>Returns false if the `motion` is null or an unsupported type.</remarks>
        public static bool TryGetAverageAngularSpeed(object motion, out float averageAngularSpeed)
        {
            if (motion is Motion unityMotion)
            {
                averageAngularSpeed = unityMotion.averageAngularSpeed;
                return true;
            }
            else if (AnimancerUtilities.TryGetWrappedObject(motion, out IMotion iMotion))
            {
                averageAngularSpeed = iMotion.AverageAngularSpeed;
                return true;
            }
            else
            {
                averageAngularSpeed = default;
                return false;
            }
        }

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

        /// <summary>Outputs the <see cref="Motion.averageSpeed"/> or <see cref="IMotion.AverageVelocity"/>.</summary>
        /// <remarks>Returns false if the `motion` is null or an unsupported type.</remarks>
        public static bool TryGetAverageVelocity(object motion, out Vector3 averageVelocity)
        {
            if (motion is Motion unityMotion)
            {
                averageVelocity = unityMotion.averageSpeed;
                return true;
            }
            else if (AnimancerUtilities.TryGetWrappedObject(motion, out IMotion iMotion))
            {
                averageVelocity = iMotion.AverageVelocity;
                return true;
            }
            else
            {
                averageVelocity = default;
                return false;
            }
        }

        /************************************************************************************************************************/
    }
}

