using System;
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using Core.Economy;
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using TowerDefense.Level;
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using TowerDefense.Towers;
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using UnityEngine;
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using UnityEngine.EventSystems;
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using UnityEngine.UI;
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namespace TowerDefense.UI.HUD
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{
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/// <summary>
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/// A button controller for spawning towers
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/// </summary>
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[RequireComponent(typeof(RectTransform))]
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public class TowerSpawnButton : MonoBehaviour, IDragHandler
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{
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/// <summary>
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/// The text attached to the button
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/// </summary>
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public Text buttonText;
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public Image towerIcon;
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public Button buyButton;
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public Image energyIcon;
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public Color energyDefaultColor;
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public Color energyInvalidColor;
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/// <summary>
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/// Fires when the button is tapped
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/// </summary>
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public event Action<Tower> buttonTapped;
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/// <summary>
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/// Fires when the pointer is outside of the button bounds
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/// and still down
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/// </summary>
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public event Action<Tower> draggedOff;
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/// <summary>
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/// The tower controller that defines the button
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/// </summary>
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Tower m_Tower;
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/// <summary>
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/// Cached reference to level currency
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/// </summary>
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Currency m_Currency;
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/// <summary>
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/// The attached rect transform
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/// </summary>
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RectTransform m_RectTransform;
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/// <summary>
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/// Checks if the pointer is out of bounds
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/// and then fires the draggedOff event
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/// </summary>
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public virtual void OnDrag(PointerEventData eventData)
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{
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if (!RectTransformUtility.RectangleContainsScreenPoint(m_RectTransform, eventData.position))
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{
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if (draggedOff != null)
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{
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draggedOff(m_Tower);
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}
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}
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}
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/// <summary>
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/// Define the button information for the tower
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/// </summary>
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/// <param name="towerData">
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/// The tower to initialize the button with
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/// </param>
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public void InitializeButton(Tower towerData)
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{
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m_Tower = towerData;
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TowerLevel firstTower = towerData.CurrentTowerLevel;
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if (LevelManager.instanceExists)
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{
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m_Currency = LevelManager.instance.currency;
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m_Currency.currencyChanged += UpdateButton;
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}
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else
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{
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Debug.LogWarning("[Tower Spawn Button] No level manager to get currency object");
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}
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UpdateButton();
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}
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/// <summary>
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/// Cache the rect transform
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/// </summary>
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protected virtual void Awake()
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{
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m_RectTransform = (RectTransform)transform;
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}
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/// <summary>
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/// Unsubscribe from events
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/// </summary>
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protected virtual void OnDestroy()
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{
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if (m_Currency != null)
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{
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m_Currency.currencyChanged -= UpdateButton;
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}
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}
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/// <summary>
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/// The click for when the button is tapped
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/// </summary>
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public void OnClick()
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{
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if (buttonTapped != null)
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{
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buttonTapped(m_Tower);
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}
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}
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/// <summary>
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/// Update the button's button state based on cost
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/// </summary>
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void UpdateButton()
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{
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if (m_Currency == null)
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{
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return;
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}
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// // Enable button
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// if (m_Currency.CanAfford(m_Tower.purchaseCost) && !buyButton.interactable)
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// {
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// buyButton.interactable = true;
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// energyIcon.color = energyDefaultColor;
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// }
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// else if (!m_Currency.CanAfford(m_Tower.purchaseCost) && buyButton.interactable)
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// {
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// buyButton.interactable = false;
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// energyIcon.color = energyInvalidColor;
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// }
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}
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}
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}
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