using System.Threading;

namespace BITKit.Core.Entites
{
    /// <summary>
    /// 基本实体
    /// </summary>
    public interface IEntity
    {
        ulong Id { get; }
#if UNITY
#else
        bool TryGetComponent<T>(out T component) where T : IEntityComponent;
        IEntityComponent[] Components { get; }
        bool RegisterComponent<T>(T component) where T : IEntityComponent;
#endif

    }
    /// <summary>
    /// 基本实体组件
    /// </summary>
    public interface IEntityComponent:IAwake,IStart
    {
        IEntity Entity { get; set; }
    }
    /// <summary>
    /// 基本实体服务
    /// </summary>
    public interface IEntitiesService
    {
        /// <summary>
        /// 所有Entity
        /// </summary>
        IEntity[] Entities { get; }
        /// <summary>
        /// 注册Entity
        /// </summary>
        /// <param name="entity"></param>
        /// <returns></returns>
        bool Register(IEntity entity);
        /// <summary>
        /// 注销Entity
        /// </summary>
        /// <param name="entity"></param>
        /// <returns></returns>
        bool UnRegister(IEntity entity);
        CancellationToken CancellationToken { get; }

        /// <summary>
        /// 查询Entity,例如
        /// </summary>
        /// <para>var rotationEntities=EntitiesService.Query&lt;RotationComponent&gt;</para>
        IEntity[] Query<T>() where T : IEntityComponent;
    }
}