using DG.Tweening;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Scripting;

public class CameraKeyController : MonoBehaviour
{
    public float Height;
    public float Speed;
    public float RotaionSpeed;
    public Scpoe RotationScpoe;

    private Ray ray;
    private RaycastHit hit;

    private Ray ray2;
    private RaycastHit hit2;

    private Vector2 MouseLValue; // 鼠标左键变量
    private Vector2 MouseRValue; // 鼠标右键变量
    private float MouseCValue; // 鼠标中键变量

    private Transform CurrentScpoe;

    private void Start()
    {
        ray = new Ray(transform.position, Vector3.down);
        if (Physics.Raycast(ray, out hit))
        {
            if (hit.transform.tag == "Scpoe")
            {
                CurrentScpoe = hit.transform;
                CurrentScpoe.GetComponent<BoxCollider>().size = new Vector3(1, 0.9f, 1);
            }
        }
    }


    void RayTest()
    {
        ray = new Ray(transform.position, Vector3.down);
        Debug.DrawRay(ray.origin, ray.direction * 100, Color.red);
        if (Physics.Raycast(ray, out hit))
        {
            transform.position = hit.point + new Vector3(0, Height, 0);
            Vector3 position = transform.position + Vector3.ProjectOnPlane(transform.forward, Vector3.up).normalized * Input.GetAxis("Vertical") * Time.deltaTime * Speed + Vector3.ProjectOnPlane(transform.right, Vector3.up).normalized * Input.GetAxis("Horizontal") * Time.deltaTime * Speed;

            if (hit.transform.tag == "Scpoe")
            {
                if (CurrentScpoe != hit.transform)
                {
                    CurrentScpoe.GetComponent<BoxCollider>().size = Vector3.one;
                    CurrentScpoe = hit.transform;
                    CurrentScpoe.GetComponent<BoxCollider>().size = new Vector3(1.1f, 0.9f, 1.1f);
                }
                MoveScpoe(CurrentScpoe.transform, ref position);
                Move(position);
            }

        }
    }

    /// <summary>
    /// 移动范围限制
    /// </summary>
    /// <param name="Scpoe">限制范围</param>
    /// <param name="Position">位置</param>
    void MoveScpoe(Transform Scpoe, ref Vector3 Position)
    {
        Vector3 SP_Dir = Position - Scpoe.position;

        SP_Dir = Vector3.ProjectOnPlane(SP_Dir, Scpoe.up);

        float Forward = Vector3.Dot(SP_Dir, Scpoe.forward);
        float Right = Vector3.Dot(SP_Dir, Scpoe.right);

        Forward = Mathf.Max(Mathf.Min(Forward, Scpoe.localScale.z * 0.5f), -Scpoe.localScale.z * 0.5f);
        Right = Mathf.Max(Mathf.Min(Right, Scpoe.localScale.x * 0.5f), -Scpoe.localScale.x * 0.5f);

        Position = Scpoe.position + Scpoe.right * Right + Scpoe.up * Height + Scpoe.forward * Forward;
    }

    void RotationController()
    {
        if (Input.GetMouseButton(1))
        {
            /*
            transform.forward += transform.right * MouseRValue.x;
            transform.forward += transform.up * MouseRValue.y;
            */
            transform.rotation = Quaternion.Euler(transform.rotation.eulerAngles + new Vector3(-MouseRValue.y, MouseRValue.x, 0) * 100);
        }
    }

    void Move(Vector3 position)
    {
        transform.position = position;
    }

    /// <summary>
    /// 鼠标变量更新
    /// </summary>
    void MouseValueUpdate()
    {
        if (Input.GetMouseButton(0))
            MouseLValue = new Vector2(Input.GetAxis("Mouse X"), Input.GetAxis("Mouse Y")) * Time.deltaTime;
        MouseLValue = Vector2.Lerp(MouseLValue, Vector2.zero, Time.deltaTime);
        if (Input.GetMouseButton(1))
            MouseRValue = new Vector2(Input.GetAxis("Mouse X"), Input.GetAxis("Mouse Y")) * Time.deltaTime;
        MouseRValue = Vector2.Lerp(MouseRValue, Vector2.zero, Time.deltaTime);
        MouseCValue -= Input.GetAxis("Mouse ScrollWheel") * Time.deltaTime;
        MouseCValue = Mathf.Lerp(MouseCValue, 0, Time.deltaTime);
    }

    private void Update()
    {
        MouseValueUpdate();
        RayTest();
        RotationController();
    }

}