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

namespace Cielonos.MainGame
{
    public partial class RunManager
    {
        /// <summary>
        /// CombatRoom 到 Run 流程的桥接层。
        /// CombatRoomSubmodule 只负责报告“战斗清空”，这里负责判断当前节点是否合法、生成 CombatRewardSession 并推动节点完成。
        /// </summary>
        public class RunCombatSubmodule : SubmoduleBase<RunManager>
        {
            public RunCombatSubmodule(RunManager owner) : base(owner)
            {
            }

            public void SubscribeRoomEvents()
            {
                // RunManager 是战斗结果进入 Run 流程的唯一入口，避免 UI/奖励系统重复解释 CombatRoom 事件。
                CombatManager.CombatRoomSm.OnRoomCleared += OnRoomCleared;
                CombatManager.CombatRoomSm.OnEnemyDefeated += OnEnemyDefeated;
            }

            public void UnsubscribeRoomEvents()
            {
                if (CombatManager.Instance == null || CombatManager.CombatRoomSm == null)
                {
                    return;
                }

                CombatManager.CombatRoomSm.OnRoomCleared -= OnRoomCleared;
                CombatManager.CombatRoomSm.OnEnemyDefeated -= OnEnemyDefeated;
            }

            private void OnEnemyDefeated(CharacterBase enemy)
            {
                owner.progressSm.RecordEnemyDefeated(enemy);
                EnemyDefeatRewardDispatcher.Dispatch(enemy, owner.currentRun?.randomizer?.Channel("EnemyDrop"));
            }

            private void OnRoomCleared()
            {
                if (owner.currentRun == null) return;

                if (!owner.currentRun.mapData.nodes.TryGetValue(owner.currentRun.currentPosition, out RunMapNode node))
                {
                    return;
                }

                if (!RunNodeTypeUtility.IsCombatNode(node.nodeType))
                {
                    // 起点或非战斗节点不应该因为空房间触发 Run 完成逻辑。
                    Debug.LogWarning($"[RunManager] Ignored OnRoomCleared because current node is not a Combat node: {node.nodeType}.");
                    return;
                }

                owner.RaiseCombatRoomCleared(node);

                if (owner.currentRun.currentPosition == owner.currentRun.mapData.bossPosition)
                {
                    Debug.Log("[RunManager] Boss 房间已清空，等待玩家交互并离开。");
                    owner.phaseSm.TransitionToPhase(RunPhase.MapSelection);
                    return;
                }

                CombatRewardContext rewardContext = new CombatRewardContext(
                    owner.currentRun,
                    node,
                    owner.currentRun.currentPosition,
                    owner.currentRun.randomizer?.Next() ?? new System.Random());

                // 奖励结算分三步：建立 session、解析配置、让装备/被动修正奖励列表。
                owner.combatRewardSm.BeginCombatRewardSession(rewardContext);
                List<CombatRewardInstruction> rewards =
                    CombatRewardResolver.Resolve(MainGameManager.Config?.combatRewardProfile, rewardContext);
                owner.combatRewardSm.ApplyCombatRewardModifiers(rewardContext, rewards);

                bool hasInteractableReward = RunCombatRewardSubmodule.HasInteractableCombatReward(rewards);
                if (hasInteractableReward)
                {
                    owner.phaseSm.TransitionToPhase(RunPhase.MapSelection);
                }

                bool hasPendingReward = rewards.Count > 0 && CombatRewardDispatcher.Dispatch(rewardContext, rewards);
                owner.combatRewardSm.NotifyCombatRewardDispatched(rewardContext);
                if (hasPendingReward)
                {
                    Debug.Log($"[RunManager] Combat 房间已清空，生成 {owner.combatRewardSm.PendingCount} 个待领取奖励。");
                    return;
                }

                if (hasInteractableReward)
                {
                    Debug.LogWarning("[RunManager] Combat 奖励规则包含交互奖励，但没有成功生成任何待领取奖励。");
                }

                Debug.Log("[RunManager] 收到 OnRoomCleared，完成当前 Combat 节点。");
                owner.combatRewardSm.CompleteCombatRewardSessionIfEmpty();
            }
        }
    }
}