using System.Collections.Generic;
using Cielonos.MainGame.Rewards;
using UnityEngine;

namespace Cielonos.MainGame.Inventory.Collections
{
    public class Recycler : ConsumableBase, ICombatRewardModifierProvider
    {
        private RecyclerCombatRewardModifier _modifier;

        public override void OnObtained()
        {
            base.OnObtained();
            RegisterCombatRewardModifiers(RunManager.Instance);
        }

        public override void OnDiscarded()
        {
            base.OnDiscarded();
            _modifier?.Expire();
        }

        public void RegisterCombatRewardModifiers(RunManager runManager)
        {
            if (runManager == null || stackAmount <= 0)
            {
                return;
            }

            if (_modifier == null || _modifier.IsExpired)
            {
                _modifier = new RecyclerCombatRewardModifier(this);
            }

            runManager.AddCombatRewardModifier(_modifier);
        }

        private class RecyclerCombatRewardModifier : ICombatRewardModifier
        {
            private readonly Recycler _owner;
            private bool _expired;

            public RecyclerCombatRewardModifier(Recycler owner)
            {
                _owner = owner;
            }

            public bool IsExpired => _expired || _owner == null || _owner.stackAmount <= 0;

            public void Modify(CombatRewardContext context, List<CombatRewardInstruction> rewards)
            {
                if (IsExpired || RunManager.Instance == null || !RunManager.Instance.IsNormalCombatNode(context.NodeType))
                {
                    return;
                }

                if (!_owner.Use(1))
                {
                    return;
                }

                rewards.Add(new CombatRewardInstruction
                {
                    type = CombatRewardInstructionType.SupplyPack,
                    count = 1,
                });
                Debug.Log("[Recycler] 自动使用，额外生成一个 SupplyPack。");
            }

            public void OnDispatched(CombatRewardContext context)
            {
            }

            public void Expire()
            {
                _expired = true;
            }
        }
    }
}