using System;
using System.Collections.Generic;

namespace Net.Project.B.Craft
{
    // 合成配方
    public interface ICraftRecipe
    {
        int Id { get; }
        public int CraftItemId { get; }
        IReadOnlyDictionary<int,int> RequiredItems { get; }
        IReadOnlyDictionary<string,int> RequiredTags { get; }
        IReadOnlyCollection<ICraftEnvironment> RequiredEnvironments { get; }
    }

    public class CraftRecipe : ICraftRecipe
    {
        public int Id { get; set; }
        public int CraftItemId { get; set; }
        public readonly Dictionary<int, int> RequiredItems = new();
        public readonly Dictionary<string,int> RequiredTag = new();
        public readonly HashSet<ICraftEnvironment> RequiredEnvironments = new();

        IReadOnlyDictionary<int, int> ICraftRecipe.RequiredItems => RequiredItems;
        IReadOnlyDictionary<string, int> ICraftRecipe.RequiredTags => RequiredTag;
        IReadOnlyCollection<ICraftEnvironment> ICraftRecipe.RequiredEnvironments => RequiredEnvironments;
    }
    // 合成服务
    public interface ICraftingService
    {
        /// <summary>
        /// 获取可合成配方（无 GC 分配），写入调用方传入的缓冲区
        /// </summary>
        /// <param name="buffer">结果缓冲区</param>
        /// <returns>写入的个数</returns>
        int GetCraftableRecipesNonGc(
            ICraftRecipe[] buffer);

        /// <summary>
        /// 判断是否可以合成（无 GC）
        /// </summary>
        bool CanCraftNonGc(ICraftRecipe recipe,out ICraftRecipe missing);

        /// <summary>
        /// 执行合成（不会分配新对象）
        /// </summary>
        bool TryCraftNonGc(ICraftRecipe recipe);
        
        /// <summary>
        /// 获取合成环境
        /// </summary>
        /// <param name="buffer"></param>
        /// <returns></returns>
        int QueryCraftEnvironments(ICraftEnvironment[] buffer);
    }

}