using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
public class CharacterControl : MonoBehaviour
{
    // 当前移动速度
    private float currentSpeed = 0f;
    private float speedSmoothVelocity = 0f;  // 用于存储速度平滑过渡的参考值

    //移动的速度
    public float moveSpeed=1f;
    //主摄像机，用于确定移动的方向
    public Camera mainCamera;
    private Vector3 moveDirection = Vector3.zero;

    //角色rigidbody
    private Rigidbody body;
    //弹跳力
    public float JumpAbility = 1f;
    //跳后的移动速度
    public float JumpMoveSpeed = 1f;
    //角色动画控制器
    private CharacterAin Characterain;

    //接收输入
    float vertical;
    float horizontal;
    //垂直和水平输入值计算出一个方向向量
    Vector3 dir;

    //判断是否在移动
    private bool IsMoving = false;



    // 定义相机 FOV 相关变量
    public float normalFOV = 60f;  // 正常行走时的FOV
    public float sprintFOV = 120f;  // 奔跑时的FOV
    public float fovChangeSpeed = 2f;  // FOV改变的速

    
    //跑步切换的时间
    private float MoveTime = 0f;
    //走路的时间
    public float walkTime;
    //跑的时间
    public float runTime;
    //跑步时平滑切换fov
    private float targetFOV;

    private Button recubtn;

    
    // Start is called before the first frame update
    void Start()
    {
        recubtn = GameObject.Find("Canvas/Recuse").GetComponent<Button>();
        recubtn.gameObject.SetActive(false);
        recubtn.onClick.AddListener(Recuse);
        Init();
    }

    // Update is called once per frame
    void Update()
    {
       // Jump();
        //JumpMove();
    }

    private void FixedUpdate()
    {
        Move();
        Face();
    }


    //初始化
    void Init()
    {
        body = transform.GetComponent<Rigidbody>();
        if (body==null)
        {
            body = gameObject.AddComponent<Rigidbody>();
        }
        Characterain = transform.GetComponent<CharacterAin>();
    }

    //移动，走、奔跑，键盘or手柄控制
    void Move()
    {

        //不在地面不能移动或者在跳跃不能移动
        //如果不加Characterain.characterState==CharacterState.jump，可能会导致跳跃后落到地面的瞬间，瞬间转为移动状态，动画会异常，无法恢复站立
        //解决方案二，在charaterAin中将检测恢复函数写到update里。（现写在fixedupdate）
        if (!Characterain.IsOnGround()|| Characterain.characterState==CharacterState.jump)
        {
            return;
        }

        //获取输入
        vertical = Input.GetAxis("Vertical");
        horizontal = Input.GetAxis("Horizontal");


        // 使用摄像头的方向来计算角色的移动方向
        Vector3 forward = mainCamera.transform.forward; // 摄像头前方
        Vector3 right = mainCamera.transform.right; // 摄像头右方

        // 将 Y 轴的方向设为 0，避免角色朝上下移动
        forward.y = 0f;
        right.y = 0f;

        // 归一化方向向量
        forward.Normalize();
        right.Normalize();

        // 计算移动方向
        dir = forward * vertical + right * horizontal;
        //dir = transform.forward * vertical +transform.right * horizontal;

        //死区
        //移动，暂时只要向前移动的动画
        if (Mathf.Abs(vertical) > 0.01f || Mathf.Abs(horizontal) > 0.01f)
        {
            if (MoveTime< (walkTime + runTime+0.1f))
            {
              MoveTime += Time.deltaTime;
            }
           
           
            MoveState();          

            if (!IsMoving)
            {
                IsMoving = true;
            }            
        }
        else if(Characterain.GetCharacterState()!= CharacterState.jump)
        {
            Characterain.SetPlayerState(CharacterState.idle);
            IsMoving = false;
            MoveTime = 0f;
        }
    }

    //移动状态
    void MoveState()
    {
        if (MoveTime < walkTime)  // 慢走
        {
            Characterain.SetPlayerState(CharacterState.SlowWalk);
            body.MovePosition(transform.position + dir * Time.deltaTime * moveSpeed * 1f);
            targetFOV = normalFOV; // 设置目标FOV为正常值
        }
        else if (MoveTime < (walkTime+runTime)) // 普通行走 
        {
            Characterain.SetPlayerState(CharacterState.walk);
            body.MovePosition(transform.position + dir * Time.deltaTime * moveSpeed * 1.5f);
            targetFOV = normalFOV + 30f; // 设置目标FOV为增加值
        }
        else  // 奔跑
        {
            Characterain.SetPlayerState(CharacterState.run);
            body.MovePosition(transform.position + dir * Time.deltaTime * moveSpeed * 2f);
            targetFOV = sprintFOV; // 设置目标FOV为奔跑值
        }

        // 使用插值平滑调整相机的FOV
        mainCamera.fieldOfView = Mathf.Lerp(mainCamera.fieldOfView, targetFOV, fovChangeSpeed * Time.deltaTime);
    }

  

    //面向
    void Face()
    {
        
      // 计算输入方向
        Vector3 moveInput = new Vector3(horizontal, 0f, vertical).normalized;
    
        if (moveInput.magnitude > 0.1f) // 如果有输入
        {
            // 将输入方向与摄像机方向结合，计算出角色应该面向的世界方向
            Vector3 targetDirection = mainCamera.transform.forward * vertical + mainCamera.transform.right * horizontal;
            targetDirection.y = 0f; // 忽略Y轴的旋转，只关注水平旋转
            targetDirection.Normalize();

            // 计算目标旋转角度
            Quaternion targetRotation = Quaternion.LookRotation(targetDirection);

            // 使用Slerp平滑地旋转到目标角度，rotationSpeed控制转身的快慢
            float rotationSpeed = 10f; // 旋转速度可调
            transform.rotation = Quaternion.Slerp(transform.rotation, targetRotation, rotationSpeed * Time.deltaTime);
        }
    }

    //jump已经不需要了
    //跳
    //void Jump()
    //{
    //    if (Input.GetKey(KeyCode.Space) && Characterain.GetCharacterState() != CharacterState.jump)
    //    {
    //        body.AddForce(Vector3.up * JumpAbility * 2F, ForceMode.Impulse);
    //        Characterain.SetPlayerState(CharacterState.jump);
    //    }
    //}

    //跳后的移动
    //void JumpMove()
    //{
    //    if (IsMoving && !Characterain.IsOnGround())
    //    {
    //        Vector3 airMoveForce = dir.normalized * JumpMoveSpeed * 0.5f;
    //        body.AddForce(airMoveForce, ForceMode.Force);
    //    }
    //}

    void Recuse()
    {
        Characterain.SetSkillAin(CharacterSkill.Rescue);
        StartCoroutine("Rescuereturn");
    }

    IEnumerator Rescuereturn()
    {
        yield return new WaitForSeconds(2);
        Characterain.SetSkillAin(CharacterSkill.NoSkill);
    }

}