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using UnityEngine.EventSystems;

using UnityEngine;

[RequireComponent(typeof(RectTransform))]

public class Minimap : MonoBehaviour, IPointerDownHandler, IPointerUpHandler

{

public RectTransform minimapContainerRectTransform;

public Vector2 terrainSize;

private Vector2 _uiSize;

private Vector2 _offset;

private Vector2 _lastPointerPosition;

private bool _dragging = false;

private void Start()

{

_offset = minimapContainerRectTransform.anchoredPosition;

_uiSize = GetComponent<RectTransform>().sizeDelta;

_lastPointerPosition = Input.mousePosition;

}

private void Update()

{

if (!_dragging) return;

Vector2 delta = (Vector2) Input.mousePosition - _lastPointerPosition;

_lastPointerPosition = Input.mousePosition;

if (delta.magnitude > Mathf.Epsilon)

{

Vector2 uiPos = (new Vector2(Input.mousePosition.x, Input.mousePosition.y) - _offset) / GameManager.instance.canvasScaleFactor;

Vector3 realPos = new Vector3(

uiPos.x / _uiSize.x * terrainSize.x,

0f,

uiPos.y / _uiSize.y * terrainSize.y

);

realPos = Utils.ProjectOnTerrain(realPos);

EventManager.TriggerEvent("MoveCamera", realPos);

}

}

public void OnPointerDown(PointerEventData eventData)

{

_dragging = true;

}

public void OnPointerUp(PointerEventData eventData)

{

_dragging = false;

}

}