using System.Security.Cryptography;
using System.Text;
using SharpDX;
using SparkClient.Model.Enums;

namespace SparkClient.Model.Entity;
/// <summary>
/// 三角形
/// </summary>
public class Viewport3DTriangleEntity
{
    /// <summary>
    /// 点1
    /// </summary>
    public Vector3 Point1 { get; set; }
    /// <summary>
    /// 点2
    /// </summary>
    public Vector3 Point2 { get; set; }
    /// <summary>
    /// 点3
    /// </summary>
    public Vector3 Point3 { get; set; }
    /// <summary>
    /// 三角形代码[生成]
    /// 按顺序：p1.x,p1.y,p1.z;p2.x,p2.y,p2.z;p3.x,p3.y,p3.z 拼接后使用生成大写16位md5
    /// </summary>
    public String TriangleCode { get; set; }
    /// <summary>
    /// 面代码
    /// 由多个三角形组成的面的代码：entity1、entity2组成了一个正方形，那么他俩的TriangleCode属性值一致
    /// </summary>
    public String PlaneCode { get; set; }
    /// <summary>
    /// 面类型
    /// 比如这个面时钻石的腰部分，那么type统一，当面类型为err时则该面是一个异常面
    /// 可选值：PlaneType
    /// </summary>
    public PlaneType PlaneType { get; set; }

    public static Viewport3DTriangleEntity CreateByString(string str)
    {
        if (string.IsNullOrWhiteSpace(str))
        {
            throw new ArgumentException("Input string cannot be null or empty");
        }

        // 分割为四段
        var parts = str.Split('|');
        if (parts.Length != 4)
        {
            throw new ArgumentException("Input string format is incorrect. Expected 4 parts separated by '|'.");
        }

        // 解析第一段：坐标
        var coordinates = parts[0].Split(';');
        if (coordinates.Length != 3)
        {
            throw new ArgumentException("Coordinates part must contain exactly 3 points separated by ';'.");
        }

        var points = coordinates.Select(ParseVector3).ToArray();

        // 解析第二段：TriangleCode [内部标记]

        // 解析第三段：PlaneCode
        string planeCode = parts[2];
        if (string.IsNullOrWhiteSpace(planeCode))
        {
            throw new ArgumentException("PlaneCode cannot be null or empty");
        }

        // 解析第四段：PlaneType
        if (!int.TryParse(parts[3], out int planeTypeValue) || !Enum.IsDefined(typeof(PlaneType), planeTypeValue))
        {
            throw new ArgumentException("Invalid PlaneType value");
        }
        PlaneType planeType = (PlaneType)planeTypeValue;

        // 生成 TriangleCode 格式：p1.x,p1.y,p1.z;p2.x,p2.y,p2.z;p3.x,p3.y,p3.z 生成 MD5
        string concatenatedPoints = string.Join(";", points.Select(p => $"{p.X},{p.Y},{p.Z}"));
        string generatedTriangleCode = GenerateMD5Hash(concatenatedPoints);

        return new Viewport3DTriangleEntity
        {
            Point1 = points[0],
            Point2 = points[1],
            Point3 = points[2],
            TriangleCode = generatedTriangleCode,
            PlaneCode = planeCode,
            PlaneType = planeType
        };
    }

    // public static Viewport3DTriangleEntity CreateByJsonStr(string str)
    // {
    //     
    // }

    private static Vector3 ParseVector3(string coordinate)
    {
        var values = coordinate.Split(',');
        if (values.Length != 3)
        {
            throw new ArgumentException("Each coordinate must contain exactly 3 values separated by ','");
        }

        if (!float.TryParse(values[0], out float x) ||
            !float.TryParse(values[1], out float y) ||
            !float.TryParse(values[2], out float z))
        {
            throw new ArgumentException("Coordinate values must be valid floating-point numbers");
        }

        return new Vector3(x, y, z);
    }

    public static string GenerateMD5Hash(string input)
    {
        using (var md5 = MD5.Create())
        {
            var inputBytes = Encoding.UTF8.GetBytes(input);
            var hashBytes = md5.ComputeHash(inputBytes);

            // 转换为大写的16位十六进制字符串
            return string.Concat(hashBytes.Take(8).Select(b => b.ToString("X2")));
        }
    }
}