using System.Collections;
using UnityEngine;
using Mapbox.Unity.Map;
using Mapbox.Utils;
using Assets.Scripts.Apis.Models;
using static Assets.Scripts.Apis.Models.MapDataModel;

namespace Assets.Scenes.Ride.Scripts
{
	public class PlayerController : MonoBehaviour
	{
		[Header("Character")]
		[SerializeField]
		GameObject character;
		[SerializeField]
		float characterSpeed;
		[SerializeField]
		Animator characterAnimator;
		[SerializeField]
		AbstractMap map;

		Vector3 nextPos;
		Vector3 prePos;
		private Vector2d currentlatlong; //当前坐标
		private Vector2d nextlatlong; //下一个点的坐标
		private double totalDistance;
		private int ticks;//秒数
		public float timer = 1.0f;//计时器

		void Start()
		{
			characterAnimator = GetComponentInChildren<Animator>();
			InitializePlayer();
		}
		//初始化人物
		void InitializePlayer()
		{
			//获取玩家初始距离
			currentlatlong = map.WorldToGeoPosition(transform.localPosition);
			nextlatlong = currentlatlong;
			totalDistance = 0;
			ticks = 0;
		}
		
		void Update()
		{
			timer -= Time.deltaTime;
			if (timer <= 0 && GameManger.IsStart)//定时器
			{
				ticks++;
				Riding();
				timer = 1.0f;
			}
		}
		//计算当前玩家高度和坡度
		Item find(double totalDistance) 
		{
			double sumDistance = 0;
			MapDataModel mapDataModel = GameManger.MapData;
            foreach (var item in mapDataModel.List)
            {
				sumDistance += item.Distance;
				if (totalDistance < sumDistance)
				{
					return item;
				}
			}
			return mapDataModel.List[0];
		}

		void Riding()
		{
			//yield return new WaitForSeconds(1.0f);
			////读取当前速度以及骑行距离
			MapDataModel mapDataModel = GameManger.MapData;
            Item nextRange = find(totalDistance);
            double elevation = nextRange.Elevation;
            double gradev = nextRange.Grade;
            double power = Random.Range(700, 2000);//TODO
            double distance = Helper.CalculateSpeed(elevation, gradev, power, 65, 7) / 3600;
		

			characterAnimator.SetBool("IsRide", false);
			totalDistance += distance;
			if (totalDistance  <= mapDataModel.TotalDistance)
			{
				if (distance > 0)
				{
					var v = GameManger.Along(totalDistance);
					StartCoroutine(CamControl());
					//设定动画状态
					characterAnimator.SetBool("IsRide", true);
					nextPos = map.GeoToWorldPosition(v);
					prePos = transform.localPosition;
					//转向
					StartCoroutine(LookAtNextPos());
					//移动
					StartCoroutine(MoveTo());
				}
			}
		}
		IEnumerator MoveTo()
		{
			//让人物移动分点增加动画的流畅度
			float t = 0;
			while (t < 1)
			{
				t += Time.deltaTime;
				Vector3 v = Vector3.Lerp(transform.localPosition, nextPos, t);
				transform.localPosition = v;
				yield return null;
			}
		}
		#region Character : Rotation
		IEnumerator LookAtNextPos()
		{
			Quaternion neededRotation = Quaternion.LookRotation(transform.localPosition - nextPos);
			Quaternion thisRotation = character.transform.localRotation;

			float t = 0;
			while (t < 1.0f)
			{
				t += Time.deltaTime / 0.25f;
				var rotationValue = Quaternion.Slerp(thisRotation, neededRotation, t);
				character.transform.rotation = Quaternion.Euler(0, rotationValue.eulerAngles.y, 0);
				yield return null;
			}
		}
		#endregion

		#region CameraControl
		[Header("CameraSettings")]
		[SerializeField]
		Camera cam;
		Vector3 previousPos = Vector3.zero;
		Vector3 deltaPos = Vector3.zero;

		IEnumerator CamControl()
		{
			if (cam != null)
			{
				float t = 0;
				while (t < 1.0f)
				{
					t += Time.deltaTime / 0.5f;
					deltaPos = transform.position - previousPos;
					//deltaPos.y = 0;
					cam.transform.position = Vector3.Lerp(cam.transform.position, cam.transform.position + deltaPos, t);
					previousPos = transform.position;
					yield return null;
				}
			}
		}
		#endregion

	}
}