using GameCore.ECS.Interfaces;

namespace GameCore.Attributes;

/// <summary>
///     A component that stores all gameplay-relevant stats for an entity.
///     This design is adapted directly from the excellent CharacterAttributes class
///     in the 'broberry' project. It's a flexible, data-driven way to manage stats.
/// </summary>
public class AttributeComponent : IComponent
{
    public readonly Dictionary<Attribute, float> BaseValues = new();
    public readonly Dictionary<Attribute, float> CurrentValues = new();

    public event Action<Attribute, float>? OnAttributeChanged;

    public void SetBaseValue(Attribute attr, float value)
    {
        BaseValues[attr] = value;
        SetCurrentValue(attr, value);
    }

    public float GetValue(Attribute attr)
    {
        return CurrentValues.GetValueOrDefault(attr, 0f);
    }

    public void ModifyValue(Attribute attr, float delta)
    {
        var newValue = GetValue(attr) + delta;
        SetCurrentValue(attr, newValue);
    }

    public void SetCurrentValue(Attribute attr, float value, bool force = false)
    {
        if (CurrentValues.TryGetValue(attr, out var oldValue) && !(System.Math.Abs(oldValue - value) > 0.001f) &&
            !force) return;

        CurrentValues[attr] = value;
        OnAttributeChanged?.Invoke(attr, value);
    }
}