cirnogodot/Scripts/Weapon.cs

using Godot;
using System;
using System.Diagnostics;
using Cirno.Scripts;

public partial class Weapon : Node2D
{
	
	[Export]
	public PackedScene BulletScene { get; set; }
	
	[Export]
	public Marker2D Muzzle { get; set; }
	
	[Export] public double RateOfFire = 0.4f;
	
	[Export] public int BulletCapacity = 20;
	
	[Export] public double ReloadTime = 1.0f;
	
	[Export] public float BulletSpeed = 100f;

	[Export] public bool AutoReload = true;
	
	[Export] public bool InfiniteAmmo = true;
	public int Ammo { get; set; } = 0;

	public int LoadedAmmo { get; private set; }
	
	public Vector2 ShootDirection { get; set; } = Vector2.Zero;
	
	private Timer _cooldownTimer;

	private Marker2D _muzzle;

	private Node2D _bulletsContainer;
	
	private GameManager _gameManager;
	
	// Called when the node enters the scene tree for the first time.
	public override void _Ready()
	{
		_muzzle = GetNode<Marker2D>("./Muzzle");
		_cooldownTimer = GetNode<Timer>("./ShootTimer");

		_gameManager = GetNode<GameManager>("/root/GameScene");
	}

	public void Reload()
	{
		_cooldownTimer.Start(ReloadTime);
		
		if (InfiniteAmmo)
		{
			LoadedAmmo = BulletCapacity;
		}
		else
		{
			// TODO: Calculate subtraction, etc
			LoadedAmmo = BulletCapacity;
		}
	}

	public void Shoot()
	{
		// Waiting on reload or Rate of Fire cooldown?
		if (!_cooldownTimer.IsStopped())
		{
			return;
		}

		// Out of ammo?
		if (LoadedAmmo <= 0)
		{
			if (AutoReload)
			{
				Reload();
			}
			return;
		}
		
		// TODO: Shoot at muzzle position, need to provide a way to turn it, on a radius?
		// TODO: Create not as child but as standalone
		
		// if (BulletScene == null) return;
		//
		// var newInstance = BulletScene.Instantiate<Bullet>();
		// _gameManager.BulletsContainer.CallDeferred("add_child", newInstance);
		
		var bullet = this.CreateChildOf<Bullet>(_gameManager.BulletsContainer, BulletScene, _muzzle.GlobalPosition);

		if (bullet == null)
		{
			GD.PrintErr("Bullet is null, not shooting");
			return;
		};
		
		bullet.SetDirection(ShootDirection);
		bullet.Speed = BulletSpeed;

		LoadedAmmo -= 1;
		
		_cooldownTimer.Start(RateOfFire);
	}
}