namespace HStation.Service
{
    /// <summary>
    /// 连接列表拓展
    /// </summary>
    public static class RevitConnectListExtensions
    {
        /// <summary>
        /// 获取中心位置
        /// </summary>
        /// <param name="list">连接列表</param>
        /// <returns></returns>
        public static Model.RevitPosition GetCenterPosition(this List<Model.RevitConnect> list)
        {
            if (list == null || list.Count < 1)
            {
                return default;
            }
            var pts = list.Select(x => x.Position).ToList();
            return pts.GetCenter();
        }

        /// <summary>
        /// 获取开始连接
        /// </summary>
        /// <param name="list">连接列表</param>
        /// <returns></returns>
        public static Model.RevitConnect GetStartConnect(this List<Model.RevitConnect> list)
        {
            if (list == null || list.Count < 1)
            {
                return default;
            }
            var start = list.Find(x => x.Direction == Direction.Inlet);
            if (start == null)
            {
                start = list.Where(x => x.Direction == Direction.None).FirstOrDefault();
            }
            return start;
        }

        /// <summary>
        /// 获取开始连接列表
        /// </summary>
        /// <param name="list">连接列表</param>
        /// <returns></returns>
        public static List<Model.RevitConnect> GetStartConnects(this List<Model.RevitConnect> list)
        {
            if (list == null || list.Count < 1)
            {
                return default;
            }
            var starts = list.Where(x => x.Direction == Direction.Inlet).ToList();
            return starts;
        }

        /// <summary>
        /// 获取结束连接
        /// </summary>
        /// <param name="list">连接列表</param>
        /// <returns></returns>
        public static Model.RevitConnect GetEndConnect(this List<Model.RevitConnect> list)
        {
            if (list == null || list.Count < 1)
            {
                return default;
            }
            var end = list.Find(x => x.Direction == Direction.Outlet);
            if (end == null)
            {
                end = list.Where(x => x.Direction == Direction.None).LastOrDefault();
            }
            return end;
        }

        /// <summary>
        /// 获取结束连接列表
        /// </summary>
        /// <param name="list">连接列表</param>
        /// <returns></returns>
        public static List<Model.RevitConnect> GetEndConnects(this List<Model.RevitConnect> list)
        {
            if (list == null || list.Count < 1)
            {
                return default;
            }
            var ends = list.Where(x => x.Direction == Direction.Outlet).ToList();
            return ends;
        }


    }
}