using Godot;

namespace Theriapolis.GodotHost.Scenes.Widgets;

/// <summary>
/// Container for unassigned AbilityToken children. Per
/// GODOT_PORTING_GUIDE.md §7.3, accepts only slot→pool drops (returning
/// an assigned value to the pool); pool→pool drops are no-ops. The step
/// consumes <see cref="Dropped"/> and mutates CharacterDraft.StatPool /
/// StatAssign in one call so the inevitable refresh re-creates tokens
/// in the right places.
/// </summary>
public partial class AbilityPool : HBoxContainer
{
    [Signal] public delegate void DroppedEventHandler(Godot.Collections.Dictionary payload);

    public override void _Ready()
    {
        AddThemeConstantOverride("separation", 8);
        MouseFilter = MouseFilterEnum.Stop;
        CustomMinimumSize = new Vector2(0, 64);
    }

    public override bool _CanDropData(Vector2 atPosition, Variant data)
    {
        if (data.VariantType != Variant.Type.Dictionary) return false;
        var d = data.AsGodotDictionary();
        if (!d.ContainsKey("kind") || d["kind"].AsString() != "ability_value") return false;
        // Only slot→pool drops are meaningful; pool→pool is a no-op.
        return d.ContainsKey("from") && d["from"].AsString() == "slot";
    }

    public override void _DropData(Vector2 atPosition, Variant data)
    {
        EmitSignal(SignalName.Dropped, data);
    }
}