cirnogodot/Scripts/Activables/BulletEmitter.cs

using System;
using Cirno.Scripts.Components;
using Cirno.Scripts.Resources;
using Godot;

namespace Cirno.Scripts.Activables;

public partial class BulletEmitter : Node2D, IActivable
{
    [Export]
    public BulletResource BulletResource { get; set; }
    
    [Export]
    public bool EmitOnStart { get; set; } = false;
    
    [Export]
    public float EmitCoolDown { get; private set; } = 1f;
    
    [Export] public float Spread { get; set; } = 0f;

    [Export] public int Count { get; set; } = 1;
    
    [Export] public float EmissionRotation { get; set; } = 0f;

    private BulletSpawner _bulletSpawner;

    private bool _isEmitting = false;

    private double _emitTimer = 0f;
    
    public override void _Ready()
    {
        _bulletSpawner = GetNode<BulletSpawner>("BulletSpawner");
        if (EmitOnStart)
        {
            _isEmitting = true;
        }
    }

    public override void _Process(double delta)
    {
        if (!_isEmitting) return;
        _emitTimer += delta;

        if (_emitTimer >= EmitCoolDown)
        {
            Shoot();
            _emitTimer = 0f;
        }
    }

    public void Shoot()
    {
        _bulletSpawner.SpawnBullet(BulletResource.MakeBullet(this.GlobalPosition, Count, Spread, EmissionRotation));
    }
    
    public void Activate(ActivationType activationType = ActivationType.Toggle)
    {
        switch (activationType)
        {
            case ActivationType.Open:
            case ActivationType.Enable:
                _isEmitting = true;
                _emitTimer = 0;
                break;
            case ActivationType.Close:
            case ActivationType.Disable:
                _isEmitting = false;
                _emitTimer = 0;
                break;
            case ActivationType.Use:
            case ActivationType.Toggle:
                _isEmitting = !_isEmitting;
                _emitTimer = 0;
                break;
            case ActivationType.Destroy:
                break;
        }
    }
}