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

public enum CharacterState
{
    idle,
    SlowWalk,
    walk,
    run,
    jump,
    Dead,
  
}

public enum CharacterSkill
{
    NoSkill,//0
    Watering, //1
    jump,//2
   Rescue,//3
   OperateSuccess,//4
   OperateFail//5
}



public class CharacterAin : MonoBehaviour
{
    private Animator ain;
    private float timer;
    private float RunSpeed;
    public CharacterState characterState;



    //玩家碰撞体
    private Vector3 colExtents;

    // Start is called before the first frame update
    void Start()
    {
        Init();
    }

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

    private void FixedUpdate()
    {
        ReState();
    }

    

    void Init()
    {
        ain = transform.GetComponent<Animator>();
        colExtents = GetComponent<Collider>().bounds.extents;
        characterState = CharacterState.idle;
        SetPlayerState(characterState);
    }


    /// <summary>
    /// 改变人物状态的动画
    /// </summary>
    /// <param name="characterState">状态枚举</param>
    public void SetPlayerState(CharacterState characterState)
    {
        if (this.characterState == CharacterState.Dead)
        {
            return;
        }

        this.characterState = characterState;
        RunSpeed = ain.GetFloat("RunSpeed");

        switch (this.characterState)
        {
            case CharacterState.idle:
                ain.SetInteger("State", 0);
                ain.SetFloat("RunSpeed", Mathf.Lerp(RunSpeed, 0f, 0.1f)); // 控制 Lerp 的第三个参数为插值系数
                ain.SetBool("IsOnGround", true);
                break;
            case CharacterState.SlowWalk:
                ain.SetInteger("State", 1);
                ain.SetFloat("RunSpeed", Mathf.Lerp(RunSpeed, 0.4f, 0.1f)); // 更小的移动速度
                break;
            case CharacterState.walk:
                ain.SetInteger("State", 1);
                ain.SetFloat("RunSpeed", Mathf.Lerp(RunSpeed, 0.6f, 0.1f)); // 正常行走速度
                break;
            case CharacterState.run:
                ain.SetInteger("State", 1);
                ain.SetFloat("RunSpeed", Mathf.Lerp(RunSpeed, 2f, 0.1f)); // 跑步速度
                break;
            case CharacterState.jump:
                ain.SetBool("IsOnGround", false);
                ain.SetInteger("State", 2);
                break;
            case CharacterState.Dead:
                ain.SetInteger("State", 99);
                break;
        }
    }

    /// <summary>
    /// 返回人物当前状态
    /// </summary>
    /// <returns></returns>
    public CharacterState GetCharacterState()
    {
        return this.characterState;
    }


    /// <summary>
    /// 球形射线检测，判断人物是否在地面
    /// </summary>
    /// <returns></returns>
    public bool IsOnGround()
    {
        //玩家碰撞体的中位发射射线
        Ray ray = new Ray(this.transform.position + Vector3.up * (2 * colExtents.x), Vector3.down);
        
        if (Physics.SphereCast(ray, colExtents.x, colExtents.x + 0.2f))
        {
            return true;
        }

        return false;
    }

    //回到地面，恢复站立
    public void ReState()
    {        
       
        if (characterState == CharacterState.jump && IsOnGround())
        {
            SetPlayerState(CharacterState.idle);
        }      
    }

    /// <summary>
    /// 技能动画
    /// </summary>
    /// <param name="Skill"></param>
    public void SetSkillAin(CharacterSkill Skill)
    {
        switch (Skill)
        {
            case CharacterSkill.NoSkill:               
                ain.SetInteger("Skill", 0);               
                break;
            case CharacterSkill.Watering:
                ain.SetInteger("Skill", 1);
                break;
            case CharacterSkill.jump:
                ain.SetInteger("Skill", 2);
                break;
            case CharacterSkill.Rescue:
                ain.SetInteger("Skill",3);
                break;
            case CharacterSkill.OperateSuccess:
                ain.SetInteger("Skill", 4);
                break;
            case CharacterSkill.OperateFail:
                ain.SetInteger("Skill", 5);
                break;
        }       
    }

    IEnumerator jiutimer(float timer)
    {
        yield return new WaitForSeconds(timer);
    }
   
}