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

public class Controller : MonoBehaviour
{
    private Touch _OldTouch1;
    private Touch _OldTouch2;

    Vector2 _M_Screenpos = new Vector2();

    bool _bMoveOrRotation;

    Vector3 _OldPosition;

    void Start()
    {
        _OldPosition = Camera.main.transform.position;
    }
    void Update()
    { 
        if (Input.touchCount <= 0)
        {
            return;
        }

  
        if (1 == Input.touchCount)
        {
            if (_bMoveOrRotation)
            {
                Touch _Touch = Input.GetTouch(0);
                Vector2 _DeltaPos = _Touch.deltaPosition;
                transform.Rotate(Vector3.down * _DeltaPos.x, Space.World);
                transform.Rotate(Vector3.right * _DeltaPos.y, Space.World);
            }
            else
            {
                if (Input.touches[0].phase == TouchPhase.Began)
                {
                    _M_Screenpos = Input.touches[0].position;

                }
                else if (Input.touches[0].phase == TouchPhase.Moved)
                {
                    Camera.main.transform.Translate(new Vector3(-Input.touches[0].deltaPosition.x * Time.deltaTime * 0.1f, -Input.touches[0].deltaPosition.y * Time.deltaTime * 0.1f, 0));
                }
            }
        }

        Touch _NewTouch1 = Input.GetTouch(0);
        Touch _NewTouch2 = Input.GetTouch(1);

        if (_NewTouch2.phase == TouchPhase.Began)
        {
            _OldTouch2 = _NewTouch2;
            _OldTouch1 = _NewTouch1;
            return;
        }

        float _OldDistance = Vector2.Distance(_OldTouch1.position, _OldTouch2.position);
        float _NewDistance = Vector2.Distance(_NewTouch1.position, _NewTouch2.position);

        float _Offset = _NewDistance - _OldDistance;

        float _ScaleFactor = _Offset / 100f;
        Vector3 _LocalScale = transform.localScale;
        Vector3 _Scale = new Vector3(_LocalScale.x + _ScaleFactor,
                               _LocalScale.y + _ScaleFactor,
                               _LocalScale.z + _ScaleFactor);

        if (_Scale.x > 0.3f && _Scale.y > 0.3f && _Scale.z > 0.3f)
        {
            transform.localScale = _Scale;
        }

        _OldTouch1 = _NewTouch1;
        _OldTouch2 = _NewTouch2;
    }

    public void BackPosition()
    {
        Camera.main.transform.position = _OldPosition;
        Camera.main.transform.eulerAngles = Vector3.zero;
    }

    public void RotationOrMove()
    {
        _bMoveOrRotation = !_bMoveOrRotation;
    }
}