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

public class ItemController : MonoBehaviour
{
    [SerializeField] public SpriteRenderer spriteRenderer;

    [SerializeField] public float holdTime = 0.3f;
    [SerializeField] public float fadeTime = 0.2f;

    [SerializeField] public float upwardForce = 4f;

    [SerializeField] public float horizontalForce = 1f;

    [SerializeField] public Rigidbody2D body;

    private ItemSpriteCollectionController itemSpriteCollectionController;

    public Item item;

    public bool fadingOut;

    private void Awake() {
        body = GetComponent<Rigidbody2D>();
        spriteRenderer = gameObject.GetComponent<SpriteRenderer>();
        itemSpriteCollectionController = GameObject.FindGameObjectWithTag("ItemSpriteCollection").GetComponent<ItemSpriteCollectionController>();
        fadingOut = false;
    }

    // Start is called before the first frame update
    private void Start() {
        body.AddForce(new Vector2(Random.Range(-0.5f, 0.5f) * horizontalForce,
                                  upwardForce));
        Invoke("StartFadeOut", holdTime);
    }

    public void Setup(Item _item) {
        item = _item;
        spriteRenderer.sprite = itemSpriteCollectionController.itemSprites[((int)item.subType) - 1];
    }

    public bool PickUp() {
        if (fadingOut) return false;
        int remaining = State.state.inventory.GainItem(item);
        GameObject[] panels = GameObject.FindGameObjectsWithTag("InventoryPanel");
        foreach (GameObject panel in panels) {
            if (panel != null && panel.activeSelf) {
                panel.GetComponent<InventoryPanelController>().RefreshAll();
            }
        }
        if (remaining == 0) {
            StartFadeOut();
            return true;
        }
        item.count = remaining;
        return false;
    }

    public void StartFadeOut() {
        if (!fadingOut) {
            fadingOut = true;
            StartCoroutine("FadeOut");
        }
    }

    IEnumerator FadeOut() {
        for (float i = fadeTime; i >= 0; i -= Time.deltaTime) {
            // TODO: Implement fade
            // text.alpha = i / fadeTime;
            spriteRenderer.color = new Color(1f, 1f, 1f, i / fadeTime);
            yield return new WaitForEndOfFrame();
        }
        Destroy(gameObject);
    }
}