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

public class GlobeRotator : MonoBehaviour
{
    public float rotationSpeed = 200f;
    public float zoomSpeed = 2f;
    public float minZoom = 5f;
    public float maxZoom = 25f;
    public float smoothing = 8f;

    private Vector3 _lastMousePos;
    private bool _isDragging;
    private Camera _cam;
    private float _deltaX;
    private float _deltaY;

    void Start()
    {
        _cam = Camera.main;
    }

    void Update()
    {
        if (Input.GetMouseButtonDown(1))
        {
            _lastMousePos = Input.mousePosition;
            _isDragging = true;
        }

        if (Input.GetMouseButtonUp(1))
            _isDragging = false;

        float targetX = 0f;
        float targetY = 0f;

        if (_isDragging)
        {
            Vector3 delta = Input.mousePosition - _lastMousePos;
            targetX = -delta.x * rotationSpeed * Time.deltaTime;
            targetY = delta.y * rotationSpeed * Time.deltaTime;
            _lastMousePos = Input.mousePosition;
        }

        _deltaX = Mathf.Lerp(_deltaX, targetX, Time.deltaTime * smoothing);
        _deltaY = Mathf.Lerp(_deltaY, targetY, Time.deltaTime * smoothing);

        transform.Rotate(Vector3.up, _deltaX, Space.World);

        Vector3 rightAxis = _cam.transform.right;
        transform.Rotate(rightAxis, _deltaY, Space.World);

        float scroll = Input.GetAxis("Mouse ScrollWheel");
        if (scroll != 0f && _cam != null)
        {
            float dist = Vector3.Distance(_cam.transform.position, transform.position);
            dist = Mathf.Clamp(dist - scroll * zoomSpeed, minZoom, maxZoom);
            _cam.transform.position = transform.position - _cam.transform.forward * dist;
        }
    }
}