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

public class ScrollViewScript : MonoBehaviour, IDropHandler, IPointerEnterHandler, IPointerExitHandler
{
    public GameObject prefab;
    public Transform contentPanel;

    // Start is called before the first frame update
    void Start()
    {
        SetGiventQuestion();
    }

    public void SetGiventQuestion()
    {
        // if new game, create one question card to start with
        GameObject question = Instantiate(prefab, new Vector2(0,0), Quaternion.identity) as GameObject;
        QuestionCard questionCard = question.GetComponent<QuestionCard>();
        questionCard.PrepareQuestion();
        questionCard.GetQuestion(true);
        questionCard.SetQuestionSafe();

        questionCard.transform.SetParent(contentPanel);
    }
    /*
    public void OnDrop(PointerEventData eventData) {
        Debug.Log(eventData.pointerDrag + " dropped on " + gameObject.name);
        Draggable d = eventData.pointerDrag.GetComponent<Draggable>();
        if (d != null) {
            // Kontrollera om man släppt kortet på en korrekt possition, 
            d.parent = contentPanel;
        }
    } */
    public void OnDrop(PointerEventData eventData) {
        Draggable d = eventData.pointerDrag.GetComponent<Draggable>();
        if (d != null) {
            d.placeholderParent = this.transform;
        }
    }

    public void OnPointerEnter(PointerEventData eventData) {
        if (eventData.pointerDrag == null) {
            return;
        }

        Draggable d = eventData.pointerDrag.GetComponent<Draggable>();
        if (d != null) {
            d.placeholderParent = this.transform;
        }
    }

    public void OnPointerExit(PointerEventData eventData) {
        if (eventData.pointerDrag == null) {
            return;
        }

        Draggable d = eventData.pointerDrag.GetComponent<Draggable>();
        if (d != null && d.placeholderParent == this.transform) {
            d.placeholderParent = d.parent;
        }
    }
}