using Autodesk.Revit.DB;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace GraphicsStudy
{
    public static class LineMethod
    {
        /// <summary>
        /// 判断两条线是否相交
        /// </summary>
        /// <param name="l1"></param>
        /// <param name="l2"></param>
        /// <returns></returns>
        public static bool IsIntersect(this Line l1, Line l2)
        {
            bool result = false;
            Line l1LengthenLine = Line.CreateBound(l1.GetEndPoint(0), l1.GetEndPoint(1));
            l1LengthenLine.MakeUnbound();
            var proResult = l1LengthenLine.Project(l2.Evaluate(0.5, true));
            if (proResult.XYZPoint.IsOnLine(l1) && proResult.XYZPoint.IsOnLine(l2))
            {
                result = true;
            }
            return result;
        }


        /// <summary>
        /// 是否共线
        /// </summary>
        /// <param name="line1"></param>
        /// <param name="line2"></param>
        /// <returns></returns>
        public static bool IsCollinear(this Autodesk.Revit.DB.Line line1, Autodesk.Revit.DB.Line line2, double distance = 0.05)
        {
            return line1.Direction.IsParallel(line2.Direction) && line2.DisToPoint(line1.Evaluate(0.5, true), out XYZ direction) < distance;
        }

        /// <summary>
        /// 判断是否是同一根线
        /// </summary>
        /// <param name="l1"></param>
        /// <param name="l2"></param>
        /// <returns></returns>
        public static bool IsSameLine(this Autodesk.Revit.DB.Line l1, Autodesk.Revit.DB.Line l2)
        {
            if (l1.GetEndPoint(0).DistanceTo(l2.GetEndPoint(0)) < 1 / 304.8 && l1.GetEndPoint(1).DistanceTo(l2.GetEndPoint(1)) < 1 / 304.8)
                return true;
            else if (l1.GetEndPoint(1).DistanceTo(l2.GetEndPoint(0)) < 1 / 304.8 && l1.GetEndPoint(0).DistanceTo(l2.GetEndPoint(1)) < 1 / 304.8)
                return true;
            else
                return false;
        }


        /// <summary>
        /// 设置z轴参数
        /// </summary>
        /// <param name="line"></param>
        /// <param name="z"></param>
        /// <returns></returns>
        public static Autodesk.Revit.DB.Line SetZ(this Autodesk.Revit.DB.Line line, double z = 0)
        {
            if (line.Direction.IsParallel(XYZ.BasisZ))
                throw new ArgumentException("线无法进行Z值设置");
            if (line.GetEndPoint(0).SetZ(z).DistanceTo(line.GetEndPoint(1).SetZ(z)) < 1 / 304.8)
                throw new ArgumentException("线太短");
            return Autodesk.Revit.DB.Line.CreateBound(line.GetEndPoint(0).SetZ(z), line.GetEndPoint(1).SetZ(z));
        }

        public static Curve SetZ(this Curve curve, double z = 0)
        {
            var line = curve as Autodesk.Revit.DB.Line;
            if (line.Direction.IsParallel(XYZ.BasisZ))
                throw new ArgumentException("线无法进行Z值设置");
            if (line.GetEndPoint(0).SetZ(z).DistanceTo(line.GetEndPoint(1).SetZ(z)) < 1 / 304.8)
                throw new ArgumentException("线太短");
            return Autodesk.Revit.DB.Line.CreateBound(line.GetEndPoint(0).SetZ(z), line.GetEndPoint(1).SetZ(z));
        }
        /// <summary>
        /// 点到线的距离
        /// </summary>
        /// <param name="line"></param>
        /// <param name="point"></param>
        /// <param name="direction"></param>
        /// <returns></returns>
        public static double DisToPoint(this Autodesk.Revit.DB.Line line, XYZ point, out XYZ direction)
        {
            var nwLine = line.SetZ();
            nwLine.MakeUnbound();
            XYZ projectPoint = nwLine.Project(point.SetZ()).XYZPoint;
            double distance = point.SetZ().DistanceTo(projectPoint);
            direction = (point.SetZ() - projectPoint).Normalize();
            return distance;

        }
        public static double DisToPoint(this Autodesk.Revit.DB.Line line, XYZ point)
        {
            var nwLine = line.SetZ();
            nwLine.MakeUnbound();
            XYZ projectPoint = nwLine.Project(point.SetZ()).XYZPoint;
            double distance = point.SetZ().DistanceTo(projectPoint);
            return distance;

        }


        /// <summary>
        /// 两平行线求中线（中线长度按最长条）
        /// </summary>
        /// <param name="curve1"></param>
        /// <param name="curve2"></param>
        /// <param name="distance"></param>
        /// <returns></returns>
        public static Line GetMidLine(this Line curve1, Line curve2, out double distance)
        {
            distance = double.MaxValue;
            if (curve1.Length < curve2.Length)
            {
                var tempLine = curve1;
                curve1 = curve2;
                curve2 = tempLine;
            }
            Line midline;
            XYZ startPoint = curve1.GetEndPoint(0);
            XYZ endPoint = curve1.GetEndPoint(1);
            Line line2 = Line.CreateBound(curve2.GetEndPoint(0), curve2.GetEndPoint(1));
            line2.MakeUnbound();
            midline = Line.CreateBound((startPoint + line2.Project(startPoint).XYZPoint) / 2, (endPoint + line2.Project(endPoint).XYZPoint) / 2);
            distance = startPoint.DistanceTo(line2.Project(startPoint).XYZPoint).ToMM();
            return midline;
        }
    }
}