using System;

namespace UniVRM10
{
    [Serializable]
    public struct MorphTargetBinding : IEquatable<MorphTargetBinding>
    {
        /// <summary>
        /// SkinnedMeshRenderer を 指し示す。
        /// 
        /// [トレードオフ]
        /// 
        /// * SkinnedMeshRenderer そのものの方がわかりやすい
        /// * Prefab 生成時の順番問題
        ///   * Prefabの中で、Prefab自体を参照するので String の方が扱いが楽(Prefab生成時にトラブルになりがち。Runtimeロードでは問題ない)
        /// * モデル変更時の改変への強さ
        /// 
        /// </summary>
        public String RelativePath;
        public int Index;
        public float Weight;

        public override string ToString()
        {
            return string.Format("{0}[{1}]=>{2}", RelativePath, Index, Weight);
        }

        public bool Equals(MorphTargetBinding other)
        {
            return string.Equals(RelativePath, other.RelativePath) && Index == other.Index && Weight.Equals(other.Weight);
        }

        public override bool Equals(object obj)
        {
            if (ReferenceEquals(null, obj)) return false;
            return obj is MorphTargetBinding && Equals((MorphTargetBinding)obj);
        }

        public override int GetHashCode()
        {
            unchecked
            {
                var hashCode = (RelativePath != null ? RelativePath.GetHashCode() : 0);
                hashCode = (hashCode * 397) ^ Index;
                hashCode = (hashCode * 397) ^ Weight.GetHashCode();
                return hashCode;
            }
        }
    }
}