using GatherAndDefend.Events;
using System.Collections;
using TMPro;
using UnityEngine;
using UnityEngine.EventSystems;
using UnityEngine.UI;

public abstract class UnitPlacementButton : PlacementButton
{
    [SerializeField]
    protected Sprite _detectionRangeSprite;

    [SerializeField]
    protected int _wood;
    [SerializeField]
    protected int _rock;
    [SerializeField]
    protected int _food;
    [SerializeField]
    protected int _cooldownInSeconds = 3;

    [SerializeField]
    private TMP_Text _foodLabel;
    [SerializeField]
    private TMP_Text _woodLabel;
    [SerializeField]
    private TMP_Text _rockLabel;

    [SerializeField]
    protected Image _cooldownIndicator;
    protected bool _lockedByCooldown;

    protected override void Update()
    {
        base.Update();

        SetTextFor(_foodLabel, _food);
        SetTextFor(_rockLabel, _rock);
        SetTextFor(_woodLabel, _wood);
    }
    void SetTextFor(TMP_Text label, int value)
    {
        label.transform.parent.gameObject.SetActive(value > 0);
        label.text = "" + value;
    }
    public override void OnPointerDown(PointerEventData eventData)
    {
        base.OnPointerDown(eventData);
        if (Placeholder is UnitPlaceholder placeHolder)
        {
            placeHolder.Rock = _rock;
            placeHolder.Wood = _wood;
            placeHolder.Food = _food;
            placeHolder.WasPlaced += HandleCooldown;
        }
        
    }

    private void HandleCooldown(UnitPlaceholder unitPlaceholder)
    {
        unitPlaceholder.WasPlaced -= HandleCooldown;
        StartCoroutine(HandleCooldownCoroutine());
            

        IEnumerator HandleCooldownCoroutine() 
        {
            var countDown = 0f;
            _lockedByCooldown = true;
            _cooldownIndicator.gameObject.SetActive(true);
            while (countDown < _cooldownInSeconds)
            {
                countDown += Time.deltaTime;
                var percentDone = countDown / _cooldownInSeconds;
                _cooldownIndicator.fillAmount = 1 - percentDone;
                yield return null;
            }
            _cooldownIndicator.gameObject.SetActive(false);
            _lockedByCooldown = false;
        }
    }

    protected override bool CanPlace()
    {
        return base.CanPlace() && !_lockedByCooldown;
    }
}