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using System;
using gaemstone.Utility;
using static flecs_hub.flecs;
namespace gaemstone.ECS;
public unsafe class IdentifierRef
: IEquatable<IdentifierRef>
{
public Universe Universe { get; }
public Identifier ID { get; }
public IdentifierFlags Flags => ID.Flags;
public bool IsPair => ID.IsPair;
public bool IsWildcard => ID.IsWildcard;
public bool IsValid => ecs_id_is_valid(Universe, ID);
public IdentifierRef(Universe universe, Identifier id)
{ Universe = universe; ID = id; }
public static IdentifierRef Combine(IdentifierFlags flags, IdentifierRef id)
=> new(id.Universe, Identifier.Combine(flags, id));
public static IdentifierRef Pair(EntityRef relation, Entity target)
=> new(relation.Universe, Identifier.Pair(relation, target));
public static IdentifierRef Pair(Entity relation, EntityRef target)
=> new(target.Universe, Identifier.Pair(relation, target));
public (EntityRef Relation, EntityRef Target)? AsPair()
=> IsPair ? (Universe.LookupOrThrow(ID.RelationUnsafe), Universe.LookupOrThrow(ID.TargetUnsafe)) : null;
public bool Equals(IdentifierRef? other) => (other is not null) && (Universe == other.Universe) && (ID == other.ID);
public override bool Equals(object? obj) => Equals(obj as IdentifierRef);
public override int GetHashCode() => HashCode.Combine(Universe, ID);
public override string? ToString() => ecs_id_str(Universe, this).FlecsToStringAndFree()!;
public static bool operator ==(IdentifierRef? left, IdentifierRef? right) => ReferenceEquals(left, right) || (left?.Equals(right) ?? false);
public static bool operator !=(IdentifierRef? left, IdentifierRef? right) => !(left == right);
public static implicit operator Identifier(IdentifierRef i) => i.ID;
public static implicit operator ecs_id_t(IdentifierRef i) => i.ID.Value;
}