using System.Collections.Generic;
using Models;
using UnityEngine;

public class MainBehaviour : MonoBehaviour
{
    private readonly GameObject[] _nodes = new GameObject[(int)PoseLandmarkType.MaxValue];
    private readonly List<Bond> _bonds = new List<Bond>();
    private readonly PoseTransform[] _poseTransforms = new PoseTransform[(int)PoseLandmarkType.MaxValue];
    private readonly UdpListener _listener = new UdpListener();
    private const float Scale = 0.2f;

    // Start is called before the first frame update
    private void Start()
    {
        PoseTransform.AverageLength = 3;

        CreateNodes();
        CreateBonds();

        _listener.AddHandler(OnReceive);
        _listener.Connect(5000);
    }

    // Update is called once per frame
    private void Update()
    {
        for (var i = 0; i < (int)PoseLandmarkType.MaxValue; i++)
        {
            _nodes[i].transform.position = _poseTransforms[i].AveragePos * -5;
        }

        foreach (var bond in _bonds)
        {
            bond.UpdateBond();
        }
    }

    private void OnDisable()
    {
        _listener.DisConnect();
    }
    
    private void OnReceive(List<PoseLandmark> landmarks)
    {
        foreach (var landmark in landmarks)
        {
            PoseTransform.UpdatePosition(ref _poseTransforms[(int)landmark.Type], landmark);
        }
    }

    private void CreateNodes()
    {
        for (var i = 0; i < (int)PoseLandmarkType.MaxValue; i++)
        {
            var ball = GameObject.CreatePrimitive(PrimitiveType.Sphere);

            ball.transform.localScale = new Vector3(Scale, Scale, Scale);

            if (i <= 10)
            {
                ball.GetComponent<Renderer>().material.color = Color.red;//给头部添加颜色
            }
            else if (i <= 22)
            {
                ball.GetComponent<Renderer>().material.color = Color.blue;//给手部添加颜色
            }
            else if (i <= 32)
            {
                ball.GetComponent<Renderer>().material.color = Color.green;//给脚部添加颜色
            }

            _nodes[i] = ball;
            _poseTransforms[i] = new PoseTransform((PoseLandmarkType)i);
        }
    }

    private void CreateBonds()
    {
        var headBonds = new[]
        {
            PoseLandmarkType.RightEar,
            PoseLandmarkType.RightEyeOuter,
            PoseLandmarkType.RightEye,
            PoseLandmarkType.RightEyeInner,
            PoseLandmarkType.Nose,
            PoseLandmarkType.LeftEyeInner,
            PoseLandmarkType.LeftEye,
            PoseLandmarkType.LeftEyeOuter,
            PoseLandmarkType.LeftEar
        };
        _bonds.AddRange(GenerateBondsList(headBonds));

        var monthBonds = new[]
        {
            PoseLandmarkType.MouthLeft,
            PoseLandmarkType.MouthRight,
        };
        _bonds.AddRange(GenerateBondsList(monthBonds));

        var leftArmBonds = new[]
        {
            PoseLandmarkType.LeftShoulder,
            PoseLandmarkType.LeftElbow,
            PoseLandmarkType.LeftWrist,
            PoseLandmarkType.LeftPinky,
            PoseLandmarkType.LeftIndex,
            PoseLandmarkType.LeftWrist,
            PoseLandmarkType.LeftThumb
        };
        _bonds.AddRange(GenerateBondsList(leftArmBonds));

        var rightArmBonds = new[]
        {
            PoseLandmarkType.RightShoulder,
            PoseLandmarkType.RightElbow,
            PoseLandmarkType.RightWrist,
            PoseLandmarkType.RightPinky,
            PoseLandmarkType.RightIndex,
            PoseLandmarkType.RightWrist,
            PoseLandmarkType.RightThumb
        };
        _bonds.AddRange(GenerateBondsList(rightArmBonds));

        var leftLegBonds = new[]
        {
            PoseLandmarkType.LeftShoulder,
            PoseLandmarkType.LeftHip,
            PoseLandmarkType.LeftKnee,
            PoseLandmarkType.LeftAnkle,
            PoseLandmarkType.LeftHeel,
            PoseLandmarkType.LeftFootIndex,
            PoseLandmarkType.LeftAnkle
        };
        _bonds.AddRange(GenerateBondsList(leftLegBonds));

        var rightLegBonds = new[]
        {
            PoseLandmarkType.RightShoulder,
            PoseLandmarkType.RightHip,
            PoseLandmarkType.RightKnee,
            PoseLandmarkType.RightAnkle,
            PoseLandmarkType.RightHeel,
            PoseLandmarkType.RightFootIndex,
            PoseLandmarkType.RightAnkle
        };
        _bonds.AddRange(GenerateBondsList(rightLegBonds));
        
        // 最后手动添加身体上的两条横线
        _bonds.Add(new Bond(
            _nodes[(int)PoseLandmarkType.LeftShoulder],
            _nodes[(int)PoseLandmarkType.RightShoulder],
            Scale));
        _bonds.Add(new Bond(
            _nodes[(int)PoseLandmarkType.LeftHip],
            _nodes[(int)PoseLandmarkType.RightHip],
            Scale));
    }

    /// <summary>
    /// 创建棍子列表
    /// </summary>
    /// <param name="nodes">需要连接起来的关键点 需要按顺序设置</param>
    /// <returns></returns>
    private List<Bond> GenerateBondsList(PoseLandmarkType[] nodes)
    {
        var bonds = new List<Bond>();

        for (var i = 0; i < nodes.Length - 1; i++)
        {
            bonds.Add(new Bond(
                _nodes[(int)nodes[i]], 
                _nodes[(int)nodes[i + 1]], 
                Scale));
        }

        return bonds;
    }
}