using System;
using System.Collections.Generic;
using AlicizaX;

namespace AlicizaX.ObjectPool
{
    public readonly struct ObjectPoolCreateOptions
    {
        public readonly string Name;
        public readonly bool AllowMultiSpawn;
        public readonly float AutoReleaseInterval;
        public readonly int Capacity;
        public readonly float ExpireTime;
        public readonly int Priority;

        public ObjectPoolCreateOptions(
            string name = "",
            bool allowMultiSpawn = false,
            float autoReleaseInterval = float.MaxValue,
            int capacity = int.MaxValue,
            float expireTime = float.MaxValue,
            int priority = 0)
        {
            Name = name ?? string.Empty;
            AllowMultiSpawn = allowMultiSpawn;
            AutoReleaseInterval = autoReleaseInterval;
            Capacity = capacity;
            ExpireTime = expireTime;
            Priority = priority;
        }

        public ObjectPoolCreateOptions WithName(string name)
            => new ObjectPoolCreateOptions(name, AllowMultiSpawn, AutoReleaseInterval, Capacity, ExpireTime, Priority);

        public static ObjectPoolCreateOptions Single(string name = "")
            => new ObjectPoolCreateOptions(name: name);

        public static ObjectPoolCreateOptions Multi(string name = "")
            => new ObjectPoolCreateOptions(name: name, allowMultiSpawn: true);
    }

    /// <summary>
    /// 对象池管理器。
    /// </summary>
    public interface IObjectPoolService : IService, IServiceTickable
    {
        int Count { get; }

        bool HasObjectPool<T>() where T : ObjectBase;
        bool HasObjectPool(Type objectType);
        bool HasObjectPool<T>(string name) where T : ObjectBase;
        bool HasObjectPool(Type objectType, string name);
        bool HasObjectPool(Predicate<ObjectPoolBase> condition);

        IObjectPool<T> GetObjectPool<T>() where T : ObjectBase;
        ObjectPoolBase GetObjectPool(Type objectType);
        IObjectPool<T> GetObjectPool<T>(string name) where T : ObjectBase;
        ObjectPoolBase GetObjectPool(Type objectType, string name);
        ObjectPoolBase GetObjectPool(Predicate<ObjectPoolBase> condition);
        ObjectPoolBase[] GetObjectPools(Predicate<ObjectPoolBase> condition);
        void GetObjectPools(Predicate<ObjectPoolBase> condition, List<ObjectPoolBase> results);
        ObjectPoolBase[] GetAllObjectPools();
        void GetAllObjectPools(List<ObjectPoolBase> results);
        ObjectPoolBase[] GetAllObjectPools(bool sort);
        void GetAllObjectPools(bool sort, List<ObjectPoolBase> results);

        IObjectPool<T> CreatePool<T>(ObjectPoolCreateOptions options = default) where T : ObjectBase;
        ObjectPoolBase CreatePool(Type objectType, ObjectPoolCreateOptions options = default);

        bool DestroyObjectPool<T>() where T : ObjectBase;
        bool DestroyObjectPool(Type objectType);
        bool DestroyObjectPool<T>(string name) where T : ObjectBase;
        bool DestroyObjectPool(Type objectType, string name);
        bool DestroyObjectPool<T>(IObjectPool<T> objectPool) where T : ObjectBase;
        bool DestroyObjectPool(ObjectPoolBase objectPool);

        void Release();
        void ReleaseAllUnused();
    }
}