3DTD/Assets/Scripts/PlacementSystem/PlacementManager.cs

using System;
using System.Collections;
using System.Collections.Generic;
using Unity.VisualScripting;
using UnityEngine;

public class TowerPlacementManager : MonoBehaviour
{
    /// <summary>
    /// Sender
    /// </summary>
    public static event Action<TowerPlacementManager> OnSpawnGridRequested;
    public static TowerPlacementManager Singleton;

    // Section: Selection
    private SlotManager CurrentSelected;

    // Section: Debug
    public GameObject DebugTowerPrefab;

    private void Start()
    {
        if (Singleton != this)
            Destroy(Singleton);
        Singleton = this;

        OnSpawnGridRequested?.Invoke(this);
    }

    public void OnSlotClicked(SlotManager slot, GridManager grid, int x, int y)
    {
        slot.gameObject.GetComponentInChildren<Renderer>().material.color = Color.blue;
        OnSelectSlot(slot);

        SpawnTowerAtSelected(DebugTowerPrefab);
    }

    // Called when a slot is selected
    public void OnSelectSlot(SlotManager slot)
    {
        // Detects if the selected slot is new
        if (CurrentSelected != null && CurrentSelected != slot)
            OnDeselectSlot(CurrentSelected, slot);
        CurrentSelected = slot;

        slot.gameObject.GetComponentInChildren<Renderer>().material.color = Color.blue;
    }

    // Called when another slot is getting selected
    public void OnDeselectSlot(SlotManager prevSlot, SlotManager newSlot)
    {
        prevSlot.gameObject.GetComponentInChildren<Renderer>().material.color = Color.white;
    }

    public void SpawnTowerAtSelected(GameObject towerPrefab)
    {
        Instantiate(towerPrefab, CurrentSelected.transform);
    }
}