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

public class CollectEffect : MonoBehaviour
{
    public static CollectEffect instance;
    public Transform solarPanel;
    public Transform goldMine;
    public RectTransform goldStats, metalStats;
    public Sprite energyIcon;
    public Sprite goldsIcon;

    void Awake(){
        instance=this;
    }

    void Start()
    {
        gameObject.SetActive(false);
    }

    public void Show( CollectablesData.ResourceType type){
        gameObject.SetActive(true);
        switch(type){
            case CollectablesData.ResourceType.Gold:
                foreach(Image image in transform.GetComponentsInChildren<Image>(true)){
                    image.sprite = goldsIcon;
                }
                StartCoroutine(startEffect(Camera.main.WorldToScreenPoint(goldMine.position), goldStats.position));

                break;
            case CollectablesData.ResourceType.Metal:
                foreach(Image image in transform.GetComponentsInChildren<Image>(true)){
                    image.sprite = energyIcon;
                }
                StartCoroutine(startEffect(Camera.main.WorldToScreenPoint(solarPanel.position), metalStats.position));
                break;
        }

        
    }
    [Header("Animation tweaks")]
    public int steps = 500;
    public int offset = 10;
    IEnumerator startEffect(Vector3 start, Vector3 stop){
        Vector3 diff = stop - start;
        for(int i=0; i < transform.childCount; i++){
            StartCoroutine(travel(transform.GetChild(i), start,stop));
            yield return new WaitForSeconds(0.1f);
        }
    }

    IEnumerator travel(Transform item, Vector3 start, Vector3 stop){
        Vector3 diff = stop - start;
        item.gameObject.SetActive(true);

        for(int i =0; i < steps; i++){
            item.position = start + (diff * ((float)i/(float)steps));
            item.localScale = Vector3.one * (1-(float)(Mathf.Abs(((float)steps/2f) - i)) / ((float)steps / 2f));
            yield return new WaitForFixedUpdate();
        }

        item.gameObject.SetActive(false);
    }
}