cirnogodot/Scripts/AttackPatterns/MovementPattern.cs

using Cirno.Scripts.Actors;
using Cirno.Scripts.Resources;
using Godot;

namespace Cirno.Scripts.AttackPatterns;

[GlobalClass]
public partial class MovementPattern : AttackPattern
{
    [Export] private Vector2 relativeTargetPosition;
    [Export] private float moveDuration = 2f;
    [Export] private Tween.TransitionType transitionType = Tween.TransitionType.Linear;
    [Export] private Tween.EaseType easeType = Tween.EaseType.InOut;
    [Export] private AttackPattern shootingPattern;
    

    private Tween tween;
    private bool isComplete = false;
    
    protected IScriptHost Boss;
    
    public override void Start(Node2D parent)
    {
        if (parent is not IScriptHost boss)
            return;
        
        Boss = boss;
        tween = parent.CreateTween();
        isComplete = false;
        
        Vector2 targetPosition = (Boss?.HomePosition ?? parent.GlobalPosition) + this.relativeTargetPosition;
        
        tween.TweenProperty(Parent, "position", targetPosition, moveDuration)
            .SetTrans(transitionType)
            .SetEase(easeType)
            .Finished += () => isComplete = true;

        if (shootingPattern != null && !WaitForCompletion)
        {
            shootingPattern.Start(Parent);
        }
    }

    public override void UpdatePattern(double delta)
    {
        if (shootingPattern != null && !WaitForCompletion)
        {
            shootingPattern.UpdatePattern(delta);
        }
    }

    public override bool IsComplete()
    {
        if (WaitForCompletion && shootingPattern != null)
            return isComplete && shootingPattern.IsComplete();
        return isComplete;
    }
}