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

public class Rotator : MonoBehaviour
{
    private float maxRotationPerSec = 180f;
    protected Vector3 _screenCenter;
    [SerializeField]
    float rotation_limit_x;
    [SerializeField]
    float rotation_limit_y;

    void Start()
    {
        _screenCenter =  new Vector3(
            Screen.width,
            Screen.height,
            0
            )/2;

        /*
        _screenCenter = Camera
            .current
            .WorldToScreenPoint(
                transform.position
            );
            */
        Debug.Log(_screenCenter);
    }

    // Update is called once per frame
    void Update()
    {
        #if UNITY_EDITOR
        if (!Input.GetMouseButton(0)) {
            return;
        }
        #endif

        #if !UNITY_EDITOR
        if (Input.touchCount==0) {
            return;
        }
        #endif


        float xc = rotation_limit_x/_screenCenter.x;
        float xdistance = Input.mousePosition.x - _screenCenter.x;
        float xrotation = -xdistance * xc;

        float yc = rotation_limit_y/_screenCenter.y;
        float ydistance = Input.mousePosition.y - _screenCenter.y;
        float yrotation = ydistance * yc;
        //float yrotation = 0f;

        var tragetRotatin = new Vector3(yrotation,0,xrotation);//, maxRotationPerSec);
        Vector3 distance = tragetRotatin - transform.eulerAngles;
        var d2 = Vector3.Lerp(transform.eulerAngles, tragetRotatin, 0.8f);

        var q = Quaternion.RotateTowards(transform.rotation, Quaternion.Euler(tragetRotatin), maxRotationPerSec * Time.deltaTime);

        //Debug.Log("hw = "+hw+ " coef = "+c + " distance = "+distance + " rotation = "+rotation);
        transform.rotation = q;//new Vector3(yrotation,0,xrotation);
    }

}