using System;
using System.Linq;
using UnityEngine;
using UnityEngine.UI;
using Assets.Core;
using Assets.Scripts.Apis.Models;
using DG.Tweening;
using Mapbox.Utils;
using Assets.Scenes.Ride.Scripts;
using UnityEngine.Assertions;

namespace Assets.Scripts.Scenes.VideoRide
{
    public abstract class AbstractVideoPlayer : MonoBehaviour, IRider
    {
        public double Diff { get;set; }
        protected int currentFrame { get; set; }
        protected Animator animator { get; set; }
        public GameObject head { get; set; }
        protected Image ftpImage { get; set; }
        protected Text headName { get; set; }
        protected Text headWkg { get; set; }

        public int userId { get; set; }
        public string userName { get; set; }
        public double weight;//体重
        protected double bicycleWeight;//车重
        protected double preSpeed;
        public double speed;
        public double distance;
        public double power;
        public double elevation { get; set; }
        public double cadance { get; set; }
        public double wkg { get; set; }
        public int? heartRate { get; set; }
        public double totalDistance { get; set; }
        public double currentSlope { get; set; }
        protected double nextSlope { get; set; }
        protected double nextSlopeDistance { get; set; }
        protected double currentSlopeDistance { get; set; }
        public double totalClimb { get; set; }
        public Vector2d currentlatLon { get; set; }
        public int currentIndex { get; set; }

        public int ticks { get; set; }

        protected MapDataModel mapData;
        protected bool start = true;
        protected VideoGameManager manager { get; set; }
        Transform bone_bottle_2 { get; set; }

        public double Speed { get; set; }
        public double StartDistance { get; set; }
        public double PreDistance { get; set; }
        public double EndDistance { get; set; }
        public double OnlineSpeed { get; set; }
        public int UserId => this.userId;
        public string UserName => this.userName;

        public double mockpower { get; set; }
        protected float ratio = 1;
        private static readonly int PreSpeed = Animator.StringToHash("preSpeed");
        private static readonly int AnimatorSpeed = Animator.StringToHash("speed");
        private static readonly int Grade = Animator.StringToHash("grade");
        private static readonly int Power = Animator.StringToHash("power");
        
        private Camera mainCamera;

        protected virtual void Start()
        {
            animator = GetComponent<Animator>();
            manager = FindObjectOfType<VideoGameManager>();
            mapData = manager.GetMapData();
            ComputeNextSlope();//初始化坡度等
            bone_bottle_2 = transform.Find("bone_cable_20");
            mainCamera = Camera.main;
        }
        protected virtual void Update()
        {
            CreateHeadImage();
            ComputeAnimator();//控制动画
            ComputeAnimatorSpeed();//控制动画速度
        }

        public void StartAction()
        {
            try
            {
                if (manager.IsStart())
                {
                    ComputeTimerTick();
                    ComputeNextSlope();//计算下一个坡度
                    ComputePlayer();//计算人物属性
                    Forward();
                    ComputeRecord();
                }
                else
                {
                    power = 0;
                    OnlineSpeed = 0;
                    PreDistance = EndDistance;
                    speed = 0;
                    distance = 0;
                }
            }
            catch (Exception e)
            {
                power = 0;
                speed = 0;
                Debug.LogError(e.Message);
            }
        }

        private void ComputeTimerTick()
        {
            ticks++;
        }

        public virtual void ComputeAnimator()
        {
            if (animator != null)
            {
                animator.SetFloat(PreSpeed, (float)preSpeed);
                animator.SetFloat(AnimatorSpeed, (float)OnlineSpeed);
                animator.SetFloat(Grade, (float)currentSlope);
                animator.SetFloat(Power, (float)power);
            }
        }
        //计算人物当前属性
        public virtual void ComputePlayer()
        {
            if (power > 0)
            {
                preSpeed = speed;
                speed = Helper.CalculateSpeed(elevation, currentSlope, power, weight, bicycleWeight);
            }
            else
            {
                speed = 0;
                distance = 0;
            }
        }
        //计算当前人物的经纬度
        public virtual void Forward() 
        {
            try
            {
                if (mapData == null)
                    mapData = manager.GetMapData();
                currentlatLon = manager.Along(totalDistance % mapData.TotalDistance);
            }
            catch (Exception e)
            {
                Debug.LogError(e);
            }
        }
        public virtual void ComputeAnimatorSpeed()
        {
            Assert.IsNotNull(manager);
            
            mapData = manager.GetMapData();
            
            var safeIndex = currentIndex + 1 < mapData.List.Count ? currentIndex + 1 : currentIndex;
            var num = speed == 0 ? 1f : (float)(speed / mapData.List[safeIndex].Distance);
            
            ratio = Mathf.Clamp(num, 0.3f, 1.2f);

            var info = animator.GetCurrentAnimatorClipInfo(0);
            if (info == null) return;
            
            var currentClip = info.FirstOrDefault();
            if (currentClip.clip != null)
            {
                animator.speed = ratio;
            }
        }
        public virtual void ComputeRecord() { }
        
        private const double DoubleDelta = 1E-6;

        private const double GradeFactor = 0.5f;
        //计算当前区段属性下一个区段属性
        public void ComputeNextSlope()
        {
            double sumDistance = 0;
            mapData = manager.GetMapData();
            if (mapData == null)
                return;
            var pointList = mapData.List;
            int preIndex = 0;
            for (int i = 0; i < pointList.Count; i++)
            {
                sumDistance += pointList[i].Distance;
                //decimal left = (decimal)totalDistance * 1000;
                decimal left = (decimal)totalDistance % (decimal)mapData.TotalDistance;//处理多圈的情况
                left *= 1000;
                decimal right = (decimal)sumDistance;
                if (left <= right)
                {
                    currentIndex = i;
                    break;
                }
            }
           
            if (Math.Abs(totalDistance - mapData.TotalDistance) < DoubleDelta)
            {
                currentIndex = pointList.Count - 1;
            }
            Debug.Log(currentIndex);
            preIndex = currentIndex > 0 ? currentIndex - 1 : 0;//前一个索引
            int nextIndex = currentIndex == pointList.Count - 1 ? currentIndex : currentIndex + 1; //计算下一个点的坡度和距离

            elevation = pointList[currentIndex].Elevation;
            currentSlope = pointList[currentIndex].Grade * GradeFactor;
            //CurrentDistance = pointList[currentIndex].Distance;
            //计算下一个海拔和坡度&当前区间距离
            nextSlope = pointList[nextIndex].Grade * GradeFactor;
            nextSlopeDistance = sumDistance - totalDistance * 1000;
            //NextSlopeTotalDistance = pointList[nextIndex].Distance;
            currentSlopeDistance = (totalDistance * 1000 - (sumDistance - pointList[currentIndex].Distance));
            //计算累计爬升
            totalClimb = 0;
            for (int i = 1; i <= currentIndex; i++)
            {
                var diff = mapData.List[i].Elevation - mapData.List[i - 1].Elevation;
                if (diff > 0)
                {
                    totalClimb += diff;
                }
            }
        }
        private void OnDisable()
        {
            head?.SetActive(false);
        }
        private void OnEnable()
        {
            head?.SetActive(true);
        }
        //显示人物头顶的名字
        public virtual void CreateHeadImage() 
        {
            if (head == null)
            {
                if (manager.GetHeadInfo() != null)
                {
                    head = Instantiate(manager.GetHeadInfo(), manager.GetCanvasTransform());
                    ftpImage = head.transform.Find("ftp").GetComponent<Image>();
                    headName = head.transform.Find("name").GetComponent<Text>();
                    headWkg = head.transform.Find("wkg").GetComponent<Text>();
                }
            }
            UpdateHead();
        }

        private void UpdateHead()
        {
            if (head == null) return;
            //update position
            var position = bone_bottle_2.position;
            var worldPosition = new Vector3(position.x, position.y + transform.localScale.y, position.z);
            var playerScreenPos = mainCamera.WorldToScreenPoint(worldPosition);
            playerScreenPos.y += 16f;
            head.transform.position = playerScreenPos;
            //update info
            ftpImage.fillAmount = (float)(wkg / 6);
            headName.text = UserName;
            headWkg.text = $"{wkg}W/KG";
        }

        private void OnBecameInvisible()
        {
            head.SetActive(false);
        }
        
        private void OnBecameVisible()
        {
            head.SetActive(true);
        }

        public void SetStartDistance(double distance)
        {
            this.StartDistance = distance *1000;
        }
        public void Destroy()
        {
            if (manager.CurrentPlayer != null && manager.CurrentPlayer.UserId == UserId)
            {
                manager.Pause();
            }
            head?.Destroy();
            gameObject.Destroy();
        }
        //设置当前玩家属性
        public abstract void SetPlayer(string name, double speed, double preDistance, double endDistance, double cadance, double heartRate, double wkg, int userId, double power, double currentPlayerDistance, int frame);
    }
}