cirnogodot/Scripts/Resources/BulletScript.cs

using System.Linq;
using Godot;
using Godot.Collections;

namespace Cirno.Scripts.Resources;

[GlobalClass]
public partial class BulletScript : Resource
{
    [Export]
    public Array<AttackPattern> Patterns { get; private set; }

    private Node2D _parent;
    
    private int _currentPatternIndex = 0;
    private double _patternTimer;
    
    private AttackPattern CurrentPattern => Patterns[_currentPatternIndex];

    public void Start(Node2D parent)
    {
        _parent = parent;
        if (Patterns.Count == 0) return;
        _currentPatternIndex = 0;
        
        CurrentPattern.Start(parent);
    }
    
    public void UpdatePhase(double delta)
    {
        _patternTimer += delta;
     
        CurrentPattern.UpdatePattern(delta);

        if (!CurrentPattern.WaitForCompletion || CurrentPattern.IsComplete())
        {
            _currentPatternIndex = (_currentPatternIndex + 1) % Patterns.Count;
            CurrentPattern.Start(_parent);
        }
    }
}