OldBlueWater/BlueWater/Assets/02.Scripts/AssaultMode/DraggableCard.cs

using System;
using System.Collections;
using BlueWaterProject;
using Sirenix.OdinInspector;
using UnityEngine;
using UnityEngine.EventSystems;
using UnityEngine.UI;

public class DraggableCard : MonoBehaviour, IPointerDownHandler, IDragHandler, IPointerUpHandler
{
    private Vector3 originalPosition;
    private Vector3 originalScale;
    private CanvasGroup canvasGroup;
    private GameObject border;

    [Title("Child Object")] 
    private Image typeImage;

    [InfoBox("카드가 작아지는 속도 입니다. 높을수록 천천히 작아집니다.")] [Range(0f, 1000f)]
    public float maxDistance = 500f;

    private Coroutine scaleDown;
    
    private void Awake()
    {
        border = transform.Find("Border").gameObject;
        typeImage = transform.Find("Type").GetComponent<Image>();
    }

    private void Start()
    {
        canvasGroup = GetComponent<CanvasGroup>();
        typeImage.sprite = DataManager.Inst.cardType[UnityEngine.Random.Range(0, DataManager.Inst.cardType.Length)];
    }

    public void OnPointerDown(PointerEventData eventData)
    {
        var transform1 = transform;
        originalPosition = transform1.position;
        originalScale = transform1.localScale;
        canvasGroup.alpha = 0.5f;
        //transform1.localScale = new Vector3(0.3f, 0.3f, 1f);
        if (scaleDown != null) StopCoroutine(scaleDown);
        scaleDown = StartCoroutine(ScaleDown());
    }

    public void OnDrag(PointerEventData eventData)
    {
        transform.position = Input.mousePosition;
        var ray = Camera.main.ScreenPointToRay(Input.mousePosition);
        RaycastHit hit;
        if (Physics.Raycast(ray, out hit) && hit.collider.CompareTag("Ground"))
        {
            // 마우스가 Ground 위에 있을 때
            border.SetActive(true);
        }
        else
        {
            // 마우스가 Ground 위에 없을 때
            border.SetActive(false);
        }
    }

    public void OnPointerUp(PointerEventData eventData)
    {
        // 지형에 올바르게 드롭되지 않으면
        if (IsDroppedOnTarget()) return;
        if (scaleDown != null)
        {
            StopCoroutine(scaleDown);
            scaleDown = null;
        }

        var transform1 = transform;
        transform1.position = originalPosition;
        transform1.localScale = originalScale;
        canvasGroup.alpha = 1;
    }

    private bool IsDroppedOnTarget()
    {
        var ray = Camera.main.ScreenPointToRay(Input.mousePosition);
        RaycastHit hit;

        if (!Physics.Raycast(ray, out hit)) return false;
        if (!hit.collider.CompareTag("Ground")) return false;
        Destroy(gameObject);
        var obj = Instantiate(DataManager.Inst.boat, GameManager.Inst.player.transform.position,
            Quaternion.identity);
                
        var boat = obj.GetComponent<Boat>();
        boat.TypeCardSprite.sprite = typeImage.sprite;
        boat.target = hit.point;
        //boat.OnLanded += UnitManager.Inst.AssignUnit();
            
        return true;

    }

    private IEnumerator ScaleDown()
    {
        var originalScale = transform.localScale;
        var targetScale = new Vector3(0.3f, 0.3f, 1f);

        while (true)
        {
            // 현재 위치와 원래 위치 사이의 거리를 계산
            var distance = Vector3.Distance(originalPosition, transform.position);

            // 비율을 계산 (0 = 같은 위치, 1 = maxDistance만큼나 이상 떨어져 있음)
            var ratio = Mathf.Min(distance / maxDistance, 1f);

            // SmoothStep 사용하면, 천천히 시작해서 점차 빠르게 변화
            // float의 경우만 사용할 수 있으므로, Vector3의 모든 요소에 일일이 적용
            var newScale = new Vector3(
                Mathf.SmoothStep(originalScale.x, targetScale.x, ratio),
                Mathf.SmoothStep(originalScale.y, targetScale.y, ratio),
                Mathf.SmoothStep(originalScale.z, targetScale.z, ratio)
            );

            // 조정한 스케일을 적용
            transform.localScale = newScale;

            yield return null;
        }
    }
}