using System;
using System.Collections.Generic;
using System.Linq;

using Bentley.DgnPlatformNET;
using Bentley.DgnPlatformNET.Elements;
using Bentley.GeometryNET;
using Bentley.MstnPlatformNET;

namespace RebarMsAddins
{
    /// <summary>
    /// 钢筋帮助类
    /// </summary>
    internal static class RebarHelpers
    {
        public static void CreateRebarSolid(List<Rebar> rebars, string levelName = null)
        {
            var dgnModel = Session.Instance.GetActiveDgnModel();

            if (rebars == null || rebars.Count == 0)
            {
                return;
            }
            double uorMeter = Session.Instance.GetActiveDgnModel().GetModelInfo().UorPerMeter;//米与分辨率单位的比值，绝对长度，不随主、子单位设置而改变
            var modelRef = Session.Instance.GetActiveDgnModelRef();
            var model = Session.Instance.GetActiveDgnModel();
            var layer = model.GetLevelCache().GetLevelByName("JG_EC_ZXJ");

            foreach (var rebar in rebars)
            {
                var host = new CustomItemHost(rebar.Element, false);
                CurveVector pathCurve = null;
                CurveVector profile = null;
                var d = rebar.Diameter / 1000 * uorMeter;
                //"纵向筋"需要自己定义轮廓和放样线
                if (rebar.Element.LevelId == layer.LevelId)
                {
                    var arcs = rebar.Element.GetArcs();
                    if (arcs.Count > 0)
                    {
                        //获取圆弧
                        var arc = arcs.FirstOrDefault();
                        //得到圆弧平面的法向
                        if (!arc.Vector0.CrossProduct(arc.Vector90).TryNormalize(out var normal))
                        {
                            continue;
                        }

                        var vector = normal * (rebar.Length / 1000 * uorMeter) * 0.5;
                        //拿到以元素平面为中心的两侧点，作为放样线起终点
                        var startPoint = arc.Center - vector;
                        var endPoint = arc.Center + vector;
                        //创建路径
                        List<DPoint3d> pos = new List<DPoint3d>() { startPoint, endPoint };
                        //ElementCreationHelpers.CreateLine(startPoint, endPoint);
                        pathCurve = CurveVector.CreateLinear(pos, CurveVector.BoundaryType.Open, false);
                        //截面
                        DEllipse3d dEllipse3D = DEllipse3d.FromCenterRadiusNormal(startPoint, d / 2, normal);
                        profile = CurveVector.CreateDisk(dEllipse3D, CurveVector.BoundaryType.Outer);
                    }
                }
                else
                {
                    pathCurve = rebar.Element.GetCurveVector();
                    //起点和起点的切向
                    pathCurve.GetStartEnd(out var p1, out _, out var t1, out _);
                    //在起点创建截面
                    DEllipse3d ellipse = DEllipse3d.FromCenterRadiusNormal(p1, d / 2, t1);
                    EllipseElement ellipseElem = new EllipseElement(dgnModel, null, ellipse);//使用椭圆几何创建椭圆元素
                    profile = ellipseElem.GetCurveVector();
                }

                if (profile == null || pathCurve == null)
                {
                    continue;
                }
                Create.BodyFromSweep(
                    out var entity,
                    profile,
                    pathCurve,
                    modelRef,
                    false,
                    true,
                    false,
                    null,
                    null,
                    null,
                    null);

                if (entity != null)
                {
                    BentleyStatus result = Convert1.BodyToElement(out Element eeh, entity, null, dgnModel);//将SolidKernelEntity转换为元素
                    eeh.AddToModel();//将元素写入模型
                    if (!string.IsNullOrEmpty(levelName))
                    {
                        eeh.SetLevel(levelName);
                    }
                    rebar.Element.DeliverItemTypesTo(eeh);
                    //eeh.AttachItemType()
                }
            }
        }

        /// <summary>
        /// 按图层获取钢筋的数据
        /// </summary>
        /// <param name="levelName"></param>
        /// <returns>钢筋的数据集合</returns>
        public static List<Rebar> GetRebarDataByLevelName(string levelName)
        {
            //获取当前激活的模型
            DgnModel model = Session.Instance.GetActiveDgnModel();
            //获取图层
            var layer = model.GetLevelCache().GetLevelByName(levelName);
            //拿到图层上的元素
            var elems = model.GetGraphicElements().Where(e => e.LevelId == layer.LevelId).ToList();
            List<Rebar> rebars = new List<Rebar>();
            foreach (var elem in elems)
            {
                //整理钢筋数据
                Rebar rebar = new Rebar()
                {
                    Function = elem.GetRebarPropertyValue("ID-100-名称")?.ToString(),
                    Number = elem.GetRebarPropertyValue("ID-100-编号")?.ToString(),
                    StrengthRating = elem.GetRebarPropertyValue("TC-100-钢筋强度等级")?.ToString(),
                    Diameter = Convert.ToDouble(elem.GetRebarPropertyValue("TC-100-直径")),
                    Element = elem,
                    Length = elem.GetLength()
                };
                //纵向筋通过读属性获取
                if (levelName == "JG_EC_ZXJ")
                {
                    rebar.Length = Convert.ToDouble(elem.GetRebarPropertyValue("TC-100-长度"));
                }
                rebars.Add(rebar);
            }
            return rebars;
        }
    }

    /// <summary>
    /// 如何使用
    /// </summary>
    internal static class Using
    {
        public static void Command(string unparsed)
        {
            DgnModel dgnModel = Session.Instance.GetActiveDgnModel();
            var dgnModelRef = Session.Instance.GetActiveDgnModelRef();

            //二衬结构附加筋
            var fjj = RebarHelpers.GetRebarDataByLevelName("JG_EC_FJJ");
            //二衬结构箍筋
            var guj = RebarHelpers.GetRebarDataByLevelName("JG_EC_GuJ");
            //二衬结构拉筋
            var laj = RebarHelpers.GetRebarDataByLevelName("JG_EC_LaJ");
            //二衬结构主筋
            var zj = RebarHelpers.GetRebarDataByLevelName("JG_EC_ZJ");
            //二衬结构纵向筋
            var zxj = RebarHelpers.GetRebarDataByLevelName("JG_EC_ZXJ");
            List<Rebar> list = new List<Rebar>();

            RebarHelpers.CreateRebarSolid(fjj, "JG_EC_GJMX");
            RebarHelpers.CreateRebarSolid(guj, "JG_EC_GJMX");
            RebarHelpers.CreateRebarSolid(laj, "JG_EC_GJMX");
            RebarHelpers.CreateRebarSolid(zxj, "JG_EC_GJMX");
        }
    }

    /// <summary>
    /// 钢筋
    /// </summary>
    internal class Rebar
    {

        public override string ToString() { return $"功能：{Function},编号：{Number},直径：{Diameter},长度：{Length}"; }

        /// <summary>
        /// 钢筋直径，mm
        /// </summary>
        public double Diameter { get; set; }

        /// <summary>
        /// 关联的元素
        /// </summary>
        public Element Element { get; set; }

        /// <summary>
        /// 钢筋类型 拉筋，箍筋，主筋，纵向筋、附加筋等
        /// </summary>
        public string Function { get; set; }

        /// <summary>
        /// 钢筋长度
        /// </summary>
        public double Length { get; set; }
        /// <summary>
        /// 编号N
        /// </summary>
        public string Number { get; set; }

        /// <summary>
        /// 钢筋强度等级HPB
        /// </summary>
        public string StrengthRating { get; set; }
    }
}