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

[RequireComponent(typeof(CharacterController))]
public class PlayerController : MonoBehaviour
{
    CharacterController cc;

    public Transform ftpCamera;
    private float mouseX, mouseY;//鼠标的移动值
    public float mouseSensitivity = 120f;//鼠标灵敏度
    //限制鼠标y轴
    public float minMouseY = -70f;
    public float maxMouseY = 70f;
    private float xRotation;


    public float moveSpeed = 20f;
    public float jumpSpeed = 50f;

    private float hMove, vMove;

    private Vector3 dir;


    public float gravity = 9.81f;//重力
    private Vector3 velocity;

    public Transform groundCheck;
    public float checkRadius=0.5f;
    public LayerMask groundLayer;
    private bool isGround;

    private bool isLock;

    // Start is called before the first frame update
    void Start()
    {
        cc = GetComponent<CharacterController>();
        Cursor.lockState = CursorLockMode.Locked;
        Cursor.visible = false;
        isLock = false;
    }


    // Update is called once per frame
    void Update()
    {
        if (Input.GetKeyDown(KeyCode.Q))
        {
            if (isLock)
            {
                Cursor.lockState = CursorLockMode.Locked;
                Cursor.visible = false;
                isLock = false;
            }
            else
            {
                Cursor.lockState = CursorLockMode.None;
                Cursor.visible = true;
                isLock = true;
            }
        }

        if (isLock)
        {
            return;
        }

        mouseX = Input.GetAxis("Mouse X") * mouseSensitivity * Time.deltaTime;
        mouseY = Input.GetAxis("Mouse Y") * mouseSensitivity * Time.deltaTime;
        xRotation -= mouseY;
        xRotation = Mathf.Clamp(xRotation, minMouseY, maxMouseY);
        transform.Rotate(Vector3.up * mouseX);

        ftpCamera.localRotation = Quaternion.Euler(xRotation, 0, 0);

        isGround = Physics.CheckSphere(groundCheck.position, checkRadius, groundLayer);
        if (isGround && velocity.y < 0)
        {
            velocity.y = -1f;
        }

        hMove = Input.GetAxis("Horizontal") * moveSpeed;
        vMove = Input.GetAxis("Vertical") * moveSpeed;
        dir = transform.forward * vMove + transform.right * hMove;
        cc.Move(dir * Time.deltaTime);

        if (Input.GetButtonDown("Jump") && isGround)
        {
            velocity.y = jumpSpeed;
        }

        velocity.y -= gravity * Time.deltaTime;
        cc.Move(velocity * Time.deltaTime);
    }
}