using UnityEngine;

public class FreeCameraController : MonoBehaviour
{
    public static FreeCameraController instance;
    // 相机移动速度
    public float moveSpeed = 5.0f; // 降低了移动速度
    // 相机旋转速度
    public float rotateSpeed = 0.05f; // 降低了旋转速度
    // X轴旋转的最大范围
    public float xRotationLimit = 80.0f;
    // Y轴旋转的最大范围
    //public float yRotationLimit = 180.0f;
    //public float minRotationLimitY = -1;
    //public float maxRotationLimitY = -1;
    // 是否启用碰撞检测
    public bool enableCollision = false; // 默认关闭碰撞检测，根据需要开启

    private Vector3 lastMousePosition;
    private bool isDragging = false;
    private float xRotation = 0.0f;
    private float yRotation = 0.0f;
    public bool isMov = true;
    public bool isRot = true;
    CharacterController ctrlor;
    private void Awake()
    {
        instance = this;
        DontDestroyOnLoad(this);

        // Cm = GameObject.Find("Mcam");
        ctrlor = GetComponent<CharacterController>();



        Global.appSetting.MouseMoveSpeed.RegisterWithInitValue(v => rotateSpeed = v);
    }
    /// <summary>
    /// 添加相机QE上下移动功能
    /// </summary>
    /// <returns></returns>
    Vector3 GetInputTranslationDirection()
    {
        Vector3 direction = new Vector3();

        if (Input.GetKey(KeyCode.Q))
        {
            direction += Vector3.up;
        }
        if (Input.GetKey(KeyCode.E))
        {
            direction += Vector3.down;
        }
        return direction;
    }

    void Update()
    {
        if (isMov)
        {
#if VR
            // 相机移动
            float horizontal = Input.GetAxis("Horizontal") * moveSpeed * Time.deltaTime;
            float vertical = Input.GetAxis("Vertical") * moveSpeed * Time.deltaTime;

            Vector3 move = transform.right * horizontal + transform.forward * vertical;

            transform.position += move;
#else

            //W键前进
            if (Input.GetKey(KeyCode.W))
            {
                Vector3 forward = transform.TransformDirection(Vector3.forward);
                ctrlor.Move(forward * moveSpeed * Time.deltaTime);

            }
            //S键后退
            if (Input.GetKey(KeyCode.S))
            {
                Vector3 back = transform.TransformDirection(Vector3.back);
                ctrlor.Move(back * moveSpeed * Time.deltaTime);

            }
            //A键移动
            if (Input.GetKey(KeyCode.A))
            {
                Vector3 left = transform.TransformDirection(Vector3.left);
                ctrlor.Move(left * moveSpeed * Time.deltaTime);
            }
            //D键后退
            if (Input.GetKey(KeyCode.D) && gameObject.transform.position.y > 0)
            {
                Vector3 right = transform.TransformDirection(Vector3.right);
                ctrlor.Move(right * moveSpeed * Time.deltaTime);
            }
            //E键升高
            if (Input.GetKey(KeyCode.Q))
            {
                Vector3 upward = transform.TransformDirection(Vector3.up);
                ctrlor.Move(upward * moveSpeed * Time.deltaTime);
            }
            //E键升高
            if (Input.GetKey(KeyCode.E))
            {
                Vector3 down = transform.TransformDirection(Vector3.down);
                ctrlor.Move(down * moveSpeed * Time.deltaTime);
            }
            ////添加相机QE上下移动功能
            //transform.position+= GetInputTranslationDirection()*0.01f;
#endif
        }
        if (isRot)
        {
            if (Input.GetMouseButtonDown(1))
            {
                lastMousePosition = Input.mousePosition;
                isDragging = true;
                SyncRotation();
            }




            if (Input.GetMouseButtonUp(1))
            {
                isDragging = false;
            }
            if (isDragging)
            {
                // 相机旋转

                Vector3 mouseDelta = Input.mousePosition - lastMousePosition; // 反转了鼠标差值
                lastMousePosition = Input.mousePosition;

                xRotation -= mouseDelta.y * rotateSpeed; // 反转了X轴旋转方向
                yRotation += mouseDelta.x * rotateSpeed;

                // 限制 X 轴旋转范围
                xRotation = Mathf.Clamp(xRotation, -xRotationLimit, xRotationLimit);

                // 限制 Y 轴旋转范围
                //if (minRotationLimitY != -1 && maxRotationLimitY != -1)
                //{
                //    yRotation = Mathf.Clamp(yRotation, minRotationLimitY, maxRotationLimitY);
                //}

                transform.rotation = Quaternion.Euler(xRotation, yRotation, 0);
            }
        }
    }

    // 公共方法：旋转相机到指定方向
    public void LookAtPos(Vector3 direction)
    {
        Quaternion targetRotation = Quaternion.LookRotation(direction);
        transform.rotation = targetRotation;
        SyncRotation();
    }

    public void Rotate(Vector3 eulerAngels)
    {
        transform.eulerAngles = eulerAngels;
        SyncRotation();
    }

    public void SyncRotation()
    {
        Vector3 currentRotation = transform.eulerAngles;
        xRotation = currentRotation.x;
        yRotation = currentRotation.y;

        // 归一化 xRotation 和 yRotation
        if (xRotation > 180f)
        {
            xRotation -= 360f;
        }
        else if (xRotation < -180f)
        {
            xRotation += 360f;
        }

        if (yRotation > 180f)
        {
            yRotation -= 360f;
        }
        else if (yRotation < -180f)
        {
            yRotation += 360f;
        }

        transform.eulerAngles = new Vector3(xRotation, yRotation, 0);
    }

    public void SetLock(bool isMov, bool isRot)
    {
        this.isMov = isMov;
        this.isRot = isRot;
    }
}