using Autodesk.Revit.DB;

namespace ShrlAlgoToolkit.Revit.Assists;

internal static class SpatialAssist
{
    private static List<Curve> _curvesSorted;


    /// <summary>
    /// 连成线串
    /// </summary>
    /// <param name="initCurve"></param>
    /// <param name="sourceCurves"></param>
    private static void SortOpenedContinuousCurves(Curve initCurve, List<Curve> sourceCurves)
    {
        if (sourceCurves == null)
        {
            return;
        }
        //if (sourceCurves.Count <= 2)
        //{
        //    return;
        //}
        var start = initCurve.GetEndPoint(0);
        var end = initCurve.GetEndPoint(1);
        //curvesSorted.Add(initCurve);
        sourceCurves.Remove(initCurve);

        for (var i = sourceCurves.Count - 1; i >= 0; i--)
        {
            if (sourceCurves.Count == 0)
            {
                break;
            }
            if (i >= sourceCurves.Count)
            {
                i = sourceCurves.Count - 1;
            }
            //var anotherCurve = sourceCurves[i];

            var comparisonR = initCurve.Intersect(sourceCurves[i], out var _);
            //圆
            if (comparisonR == SetComparisonResult.Disjoint && initCurve is Arc && sourceCurves[i] is Arc)
            {
                var curves = new List<Curve>() { initCurve, sourceCurves[i] };
                try
                {
                    var loop = CurveLoop.Create(curves);//如果报错，说明两个半圆没形成圆，是不连续的；
                    _curvesSorted = curves;
                    //移除当前的线段
                    sourceCurves.Remove(sourceCurves[i]);
                    return;
                }
                catch (Exception)
                {

                }
            }

            if (SetComparisonResult.Overlap == comparisonR)
            {
                //XYZ point = null;
                //if (intersectionR != null && !intersectionR.IsEmpty)
                //{
                //    point = intersectionR.get_Item(0).XYZPoint;
                //}
                var start1 = sourceCurves[i].GetEndPoint(0);
                var end1 = sourceCurves[i].GetEndPoint(1);

                if (end.IsAlmostEqualTo(start1))//顺序连接
                {
                    _curvesSorted.Add(sourceCurves[i]);
                }
                if (end.IsAlmostEqualTo(end1))//终点一样，反向加到后面
                {
                    sourceCurves[i] = sourceCurves[i].CreateReversed();//替换掉，才能保证移除的对象是同一个
                    _curvesSorted.Add(sourceCurves[i]);

                }
                if (start.IsAlmostEqualTo(start1))//起点一样，反向插到前面
                {
                    sourceCurves[i] = sourceCurves[i].CreateReversed();
                    _curvesSorted.Insert(_curvesSorted.IndexOf(initCurve), sourceCurves[i]);
                }
                if (start.IsAlmostEqualTo(end1))//顺序连接，但是在前面
                {
                    _curvesSorted.Insert(_curvesSorted.IndexOf(initCurve), sourceCurves[i]);
                }
                SortOpenedContinuousCurves(sourceCurves[i], sourceCurves);
            }
        }
    }
    /// <summary>
    /// 转线串
    /// </summary>
    /// <param name="curves"></param>
    /// <returns></returns>
    public static List<List<Curve>> ToCurveLoops(List<Curve> curves)
    {
        List<List<Curve>> list = [];
        while (curves.Any())
        {
            _curvesSorted =
                    [
                        curves[0]
                    ];
            if (!curves[0].IsBound)
            {
                curves.Remove(curves[0]);
                list.Add(_curvesSorted);
                continue;
            }
            SortOpenedContinuousCurves(curves[0], curves);
            list.Add(_curvesSorted);
        }
        //for (var i = 0; i < 100; i++)
        //{
        //    try
        //    {
        //        if (!curves.Any())
        //        {
        //            break;
        //        }
        //        _curvesSorted = new()
        //            {
        //                curves[0]
        //            };
        //        if (!curves[0].IsBound)
        //        {
        //            curves.Remove(curves[0]);
        //            list.Add(_curvesSorted);
        //            continue;
        //        }
        //        SortOpenedContinuousCurves(curves[0], curves);
        //    }
        //    catch (Exception ex)
        //    {
        //        Debug.Write(ex.StackTrace);
        //    }
        //    list.Add(_curvesSorted);
        //    if (!curves.Any())
        //    {
        //        break;
        //    }
        //}
        return list;
    }
}