CombatNode 相关逻辑补充

- CombatFinishForm：战斗节点的结算页面（杀死的敌人、获得的金币、获得的道具） - CombatSelectForm：战斗节点建造防御塔的选择 UI 以及对防御塔进行操作的 UI（只实现了建造逻辑，在 MapEntity 里做射线检测） - 构建了基本的防御塔三组件（ShooterMuzzleComp/BasicBearingComp/BasicBaseComp）和防御塔主控（DefenseTowerController）以及相应的实体类（DefenseTowerEntity）
2026-03-01 23:11:52 +08:00
parent 92cca14503
commit 564817d752
96 changed files with 7294 additions and 121 deletions
@@ -0,0 +1,68 @@
+using Components;
+using GeometryTD.Entity.EntityData;
+using UnityGameFramework.Runtime;
+
+namespace GeometryTD.Entity
+{
+    public class BulletEntity : EntityBase
+    {
+        private ShooterBullet _shooterBullet;
+
+        protected override void OnInit(object userData)
+        {
+            base.OnInit(userData);
+
+            _shooterBullet = GetComponent<ShooterBullet>();
+            if (_shooterBullet == null)
+            {
+                Log.Error("ShooterBullet component is missing on bullet entity '{0}'.", name);
+            }
+        }
+
+        protected override void OnShow(object userData)
+        {
+            base.OnShow(userData);
+
+            if (_shooterBullet == null)
+            {
+                GameEntry.Entity.HideEntity(Entity);
+                return;
+            }
+
+            if (userData is not BulletData bulletData)
+            {
+                Log.Warning("BulletData is invalid for bullet entity '{0}'.", Id);
+                GameEntry.Entity.HideEntity(Entity);
+                return;
+            }
+
+            _shooterBullet.OnShow(bulletData);
+            if (_shooterBullet.TryConsumeDespawnRequest())
+            {
+                GameEntry.Entity.HideEntity(Entity);
+            }
+        }
+
+        protected override void OnUpdate(float elapseSeconds, float realElapseSeconds)
+        {
+            base.OnUpdate(elapseSeconds, realElapseSeconds);
+
+            if (_shooterBullet == null)
+            {
+                return;
+            }
+
+            _shooterBullet.Tick(elapseSeconds);
+            if (_shooterBullet.TryConsumeDespawnRequest())
+            {
+                GameEntry.Entity.HideEntity(Entity);
+            }
+        }
+
+        protected override void OnHide(bool isShutdown, object userData)
+        {
+            _shooterBullet?.OnReset();
+            base.OnHide(isShutdown, userData);
+        }
+    }
+}
@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: e4912a44cc6c4f3d85f6d54868780f2f
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
@@ -0,0 +1,55 @@
+using Components;
+using GeometryTD.Entity.EntityData;
+using UnityGameFramework.Runtime;
+
+namespace GeometryTD.Entity
+{
+    public class DefenseTowerEntity : EntityBase
+    {
+        private DefenseTowerController _towerController;
+
+        protected override void OnInit(object userData)
+        {
+            base.OnInit(userData);
+
+            _towerController = GetComponent<DefenseTowerController>();
+            if (_towerController == null)
+            {
+                Log.Error("DefenseTowerController is missing on tower entity '{0}'.", name);
+            }
+        }
+
+        protected override void OnShow(object userData)
+        {
+            base.OnShow(userData);
+
+            if (_towerController == null)
+            {
+                return;
+            }
+
+            if (userData is not DefenseTowerData towerData)
+            {
+                Log.Warning("DefenseTowerData is invalid for tower entity '{0}'.", Id);
+                _towerController.OnReset();
+                GameEntry.Entity.HideEntity(Entity);
+                return;
+            }
+
+            _towerController.SetAutoUpdate(false);
+            _towerController.OnInit(towerData.Stats);
+        }
+
+        protected override void OnUpdate(float elapseSeconds, float realElapseSeconds)
+        {
+            base.OnUpdate(elapseSeconds, realElapseSeconds);
+            _towerController?.OnUpdate(elapseSeconds);
+        }
+
+        protected override void OnHide(bool isShutdown, object userData)
+        {
+            _towerController?.OnReset();
+            base.OnHide(isShutdown, userData);
+        }
+    }
+}
@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: d87f56efd9024709a3baf8ef8a6f4fd3
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
@@ -1,21 +1,33 @@
 using Components;
 using System.Collections.Generic;
+using GeometryTD.Definition;
 using GeometryTD.Entity.EntityData;
 using UnityEngine;

 namespace GeometryTD.Entity
 {
-    public class EnemyEntity : EntityBase
+    public class EnemyEntity : EntityBase, IDamageReceiver
    {
        private const float WaypointReachDistance = 0.05f;
+        private static readonly List<EnemyEntity> _activeEnemies = new();
+        private static readonly HashSet<int> _killedEnemyEntityIds = new();

        private Transform _target;
        private float _speed;
+        private int _maxHealth;
+        private int _currentHealth;
        private MovementComponent _movementComponent;
-        private readonly List<Vector3> _pathPoints = new List<Vector3>();
+        private readonly List<Vector3> _pathPoints = new();
        private int _pathPointIndex;
        private bool _isDespawnRequested;

+        public static IReadOnlyList<EnemyEntity> ActiveEnemies => _activeEnemies;
+
+        public static bool TryConsumeKilledFlag(int entityId)
+        {
+            return _killedEnemyEntityIds.Remove(entityId);
+        }
+
        protected override void OnInit(object userData)
        {
            base.OnInit(userData);
@@ -31,10 +43,14 @@ namespace GeometryTD.Entity
            _pathPoints.Clear();
            _pathPointIndex = 0;
            _isDespawnRequested = false;
+            _maxHealth = 1;
+            _currentHealth = 1;
            if (userData is EnemyData enemyData)
            {
                _speed = enemyData.Speed;
                _target = enemyData.Player;
+                _maxHealth = Mathf.Max(1, enemyData.MaxHealth);
+                _currentHealth = _maxHealth;
                if (enemyData.HasPath)
                {
                    IReadOnlyList<Vector3> pathPoints = enemyData.PathPoints;
@@ -47,6 +63,11 @@ namespace GeometryTD.Entity

            _movementComponent.OnInit(_speed, CachedTransform);
            _movementComponent.SetMove(true);
+            _killedEnemyEntityIds.Remove(Id);
+            if (!_activeEnemies.Contains(this))
+            {
+                _activeEnemies.Add(this);
+            }
        }

        protected override void OnUpdate(float elapseSeconds, float realElapseSeconds)
@@ -66,10 +87,45 @@ namespace GeometryTD.Entity
            _pathPoints.Clear();
            _pathPointIndex = 0;
            _isDespawnRequested = false;
+            _maxHealth = 0;
+            _currentHealth = 0;
+            _activeEnemies.Remove(this);
+            _killedEnemyEntityIds.Remove(Id);

            base.OnHide(isShutdown, userData);
        }

+        private void OnDestroy()
+        {
+            _activeEnemies.Remove(this);
+            if (Entity != null)
+            {
+                _killedEnemyEntityIds.Remove(Entity.Id);
+            }
+        }
+
+        public void TakeDamage(int damage, AttackPropertyType attackPropertyType)
+        {
+            _ = attackPropertyType;
+            if (_isDespawnRequested || damage <= 0 || _currentHealth <= 0)
+            {
+                return;
+            }
+
+            int previousHealth = _currentHealth;
+            _currentHealth = Mathf.Max(0, _currentHealth - damage);
+            if (_maxHealth > 0)
+            {
+                GameEntry.HPBar?.ShowHPBar(this, (float)previousHealth / _maxHealth, (float)_currentHealth / _maxHealth);
+            }
+
+            if (_currentHealth <= 0)
+            {
+                _killedEnemyEntityIds.Add(Id);
+                RequestDespawn();
+            }
+        }
+
        private void UpdatePathMovement(float elapseSeconds, float realElapseSeconds)
        {
            if (_isDespawnRequested)
@@ -120,6 +176,11 @@ namespace GeometryTD.Entity
        }

        private void DespawnOnReachHouse()
+        {
+            RequestDespawn();
+        }
+
+        private void RequestDespawn()
        {
            if (_isDespawnRequested)
            {
@@ -131,4 +192,4 @@ namespace GeometryTD.Entity
            GameEntry.Entity.HideEntity(Entity);
        }
    }
-}
+}
@@ -1,8 +1,12 @@
 using System;
 using System.Collections.Generic;
+using GeometryTD;
+using GeometryTD.Definition;
 using GeometryTD.Entity.EntityData;
 using GeometryTD.Pathfinding;
+using GeometryTD.UI;
 using UnityEngine;
+using UnityEngine.EventSystems;
 using UnityEngine.Tilemaps;
 using UnityGameFramework.Runtime;

@@ -12,6 +16,7 @@ namespace GeometryTD.Entity
    {
        private const string PathTileName = "Path";
        private const string FoundationTileName = "Foundation";
+        private const int DefaultTowerTypeId = 401;
        private static readonly Spawner[] EmptySpawners = Array.Empty<Spawner>();

        private readonly List<Vector3Int> _pathCells = new();
@@ -22,11 +27,25 @@ namespace GeometryTD.Entity
        private readonly List<Vector3Int> _pathCellBuffer = new();
        private readonly Dictionary<Spawner, Vector3Int> _spawnerPathStartByRef = new();
        private readonly Dictionary<Spawner, List<Vector3Int>> _defaultPathCellsBySpawner = new();
+        private readonly Dictionary<Vector3Int, int> _towerEntityIdByFoundationCell = new();
+        private readonly Dictionary<int, Vector3Int> _foundationCellByTowerEntityId = new();
+        private readonly Dictionary<int, DefenseTowerStatsData> _towerStatsByEntityId = new();
+        private readonly List<int> _towerEntityIdBuffer = new();
+
+        [SerializeField] private bool _enableCombatSelectInput = true;
+        [SerializeField] private int _towerTypeId = DefaultTowerTypeId;
+        [SerializeField] private int[] _buildTowerCosts = { 80, 120, 160, 220 };
+        [SerializeField] private int _upgradeCost = 80;
+        [SerializeField] private int _destroyGain = 40;

        private MapDataRefs _mapDataRefs;
        private MapData _mapData;
        private bool _hasHousePathCell;
        private Vector3Int _housePathCell;
+        private CombatSelectFormUseCase _combatSelectFormUseCase;
+        private bool _hasSelectedFoundationCell;
+        private Vector3Int _selectedFoundationCell;
+        private int _selectedTowerEntityId;

        public IReadOnlyList<Vector3Int> PathCells => _pathCells;
        public IReadOnlyList<Vector3Int> FoundationCells => _foundationCells;
@@ -156,6 +175,8 @@ namespace GeometryTD.Entity
            {
                Log.Error("MapDataRefs is missing on map entity '{0}'.", name);
            }
+
+            InitializeCombatSelectUseCase();
        }

        protected override void OnShow(object userData)
@@ -169,14 +190,24 @@ namespace GeometryTD.Entity
            }

            RefreshTiles();
+            ConfigureCombatSelectUseCase();
+            HideCombatSelectForm();
        }

        protected override void OnHide(bool isShutdown, object userData)
        {
+            HideCombatSelectForm();
+            ClearPlacedTowers();
            ClearRuntimeData();
            base.OnHide(isShutdown, userData);
        }

+        protected override void OnUpdate(float elapseSeconds, float realElapseSeconds)
+        {
+            base.OnUpdate(elapseSeconds, realElapseSeconds);
+            HandleCombatSelectInput();
+        }
+
        private void RefreshTiles()
        {
            ClearRuntimeData();
@@ -295,6 +326,479 @@ namespace GeometryTD.Entity
            _housePathCell = default;
            _spawnerPathStartByRef.Clear();
            _defaultPathCellsBySpawner.Clear();
+            _towerEntityIdByFoundationCell.Clear();
+            _foundationCellByTowerEntityId.Clear();
+            _towerStatsByEntityId.Clear();
+            _towerEntityIdBuffer.Clear();
+            ClearSelectedObject();
+        }
+
+        private void InitializeCombatSelectUseCase()
+        {
+            if (_combatSelectFormUseCase == null)
+            {
+                _combatSelectFormUseCase = new CombatSelectFormUseCase();
+            }
+
+            GameEntry.UIRouter.BindUIUseCase(UIFormType.CombatSelectForm, _combatSelectFormUseCase);
+        }
+
+        private void ConfigureCombatSelectUseCase()
+        {
+            if (_combatSelectFormUseCase == null)
+            {
+                return;
+            }
+
+            _combatSelectFormUseCase.SetCoinProvider(GetCurrentCoin);
+
+            for (int i = 0; i < 4; i++)
+            {
+                int buildIndex = i;
+                _combatSelectFormUseCase.SetBuildAction(
+                    buildIndex,
+                    () => TryBuildTower(buildIndex),
+                    GetBuildTowerCost(buildIndex));
+            }
+
+            _combatSelectFormUseCase.SetUpgradeAction(
+                TryUpgradeTower,
+                Mathf.Max(0, _upgradeCost));
+            _combatSelectFormUseCase.SetDestroyAction(
+                TryDestroyTower,
+                Mathf.Max(0, _destroyGain));
+        }
+
+        private void HandleCombatSelectInput()
+        {
+            if (!_enableCombatSelectInput || !Input.GetMouseButtonDown(0))
+            {
+                return;
+            }
+
+            if (EventSystem.current != null && EventSystem.current.IsPointerOverGameObject())
+            {
+                return;
+            }
+
+            if (!TryBuildCombatSelectUserData(out CombatSelectFormUserData userData))
+            {
+                userData = new CombatSelectFormUserData
+                {
+                    ClickObjectType = CombatSelectClickObjectType.None
+                };
+            }
+
+            ApplySelectedObject(userData);
+            GameEntry.UIRouter.OpenUI(UIFormType.CombatSelectForm, userData);
+        }
+
+        private bool TryBuildCombatSelectUserData(out CombatSelectFormUserData userData)
+        {
+            userData = null;
+            if (Tilemap == null || !TryGetPointerWorldPosition(out Vector3 worldPosition, out Vector2 contentPosition))
+            {
+                return false;
+            }
+
+            Vector3Int clickedCell = Tilemap.WorldToCell(worldPosition);
+            CombatSelectClickObjectType clickObjectType = CombatSelectClickObjectType.None;
+            int towerEntityId = 0;
+
+            if (_towerEntityIdByFoundationCell.TryGetValue(clickedCell, out int occupiedTowerEntityId))
+            {
+                clickObjectType = CombatSelectClickObjectType.Tower;
+                towerEntityId = occupiedTowerEntityId;
+            }
+            else if (IsFoundationCell(clickedCell))
+            {
+                clickObjectType = CombatSelectClickObjectType.Foundation;
+            }
+
+            userData = new CombatSelectFormUserData
+            {
+                ClickObjectType = clickObjectType,
+                ContentPosition = contentPosition,
+                WorldPosition = worldPosition,
+                CellPosition = clickedCell,
+                TowerEntityId = towerEntityId,
+                UpgradeCost = Mathf.Max(0, _upgradeCost),
+                DestroyGain = Mathf.Max(0, _destroyGain)
+            };
+            return true;
+        }
+
+        private bool TryGetPointerWorldPosition(out Vector3 worldPosition, out Vector2 contentPosition)
+        {
+            worldPosition = Vector3.zero;
+            contentPosition = Vector2.zero;
+
+            Camera mainCamera = GameEntry.Scene != null ? GameEntry.Scene.MainCamera : Camera.main;
+            if (mainCamera == null)
+            {
+                return false;
+            }
+
+            Ray ray = mainCamera.ScreenPointToRay(Input.mousePosition);
+            float mapPlaneZ = Tilemap != null ? Tilemap.transform.position.z : CachedTransform.position.z;
+            Vector3 planeNormal = mainCamera.transform.forward.sqrMagnitude > Mathf.Epsilon
+                ? -mainCamera.transform.forward
+                : Vector3.forward;
+            Plane mapPlane = new Plane(planeNormal, new Vector3(0f, 0f, mapPlaneZ));
+            if (!mapPlane.Raycast(ray, out float enterDistance))
+            {
+                return false;
+            }
+
+            worldPosition = ray.GetPoint(enterDistance);
+            contentPosition = BuildContentPosition(Input.mousePosition);
+            return true;
+        }
+
+        private static Vector2 BuildContentPosition(Vector3 pointerScreenPosition)
+        {
+            return new Vector2(
+                pointerScreenPosition.x - Screen.width * 0.5f,
+                pointerScreenPosition.y - Screen.height * 0.5f);
+        }
+
+        private void ApplySelectedObject(CombatSelectFormUserData userData)
+        {
+            if (userData == null)
+            {
+                ClearSelectedObject();
+                return;
+            }
+
+            switch (userData.ClickObjectType)
+            {
+                case CombatSelectClickObjectType.Foundation:
+                    _hasSelectedFoundationCell = true;
+                    _selectedFoundationCell = userData.CellPosition;
+                    _selectedTowerEntityId = 0;
+                    break;
+                case CombatSelectClickObjectType.Tower:
+                    _hasSelectedFoundationCell = true;
+                    _selectedFoundationCell = userData.CellPosition;
+                    _selectedTowerEntityId = userData.TowerEntityId;
+                    break;
+                default:
+                    ClearSelectedObject();
+                    break;
+            }
+        }
+
+        private bool TryBuildTower(int buildIndex)
+        {
+            if (!_hasSelectedFoundationCell || !IsFoundationCell(_selectedFoundationCell))
+            {
+                return false;
+            }
+
+            if (_towerEntityIdByFoundationCell.ContainsKey(_selectedFoundationCell))
+            {
+                return false;
+            }
+
+            int buildCost = GetBuildTowerCost(buildIndex);
+            if (!TryConsumeCoin(buildCost))
+            {
+                return false;
+            }
+
+            DefenseTowerStatsData towerStats = BuildTowerStats(buildIndex);
+            if (!TryShowTowerEntity(_selectedFoundationCell, towerStats, out int towerEntityId))
+            {
+                GameEntry.CombatNode?.AddCoin(buildCost);
+                return false;
+            }
+
+            _towerEntityIdByFoundationCell[_selectedFoundationCell] = towerEntityId;
+            _foundationCellByTowerEntityId[towerEntityId] = _selectedFoundationCell;
+            _towerStatsByEntityId[towerEntityId] = CloneTowerStats(towerStats);
+            _selectedTowerEntityId = towerEntityId;
+            return true;
+        }
+
+        private bool TryUpgradeTower()
+        {
+            if (!TryGetSelectedTower(out int towerEntityId, out Vector3Int foundationCell))
+            {
+                return false;
+            }
+
+            int upgradeCost = Mathf.Max(0, _upgradeCost);
+            if (!TryConsumeCoin(upgradeCost))
+            {
+                return false;
+            }
+
+            DefenseTowerStatsData oldStats = _towerStatsByEntityId.TryGetValue(towerEntityId, out DefenseTowerStatsData cachedStats)
+                ? CloneTowerStats(cachedStats)
+                : BuildTowerStats(0);
+            DefenseTowerStatsData upgradedStats = CloneTowerStats(oldStats);
+            ApplyUpgradeToStats(upgradedStats);
+
+            HideTowerEntity(towerEntityId);
+            _towerEntityIdByFoundationCell.Remove(foundationCell);
+            _foundationCellByTowerEntityId.Remove(towerEntityId);
+            _towerStatsByEntityId.Remove(towerEntityId);
+
+            if (!TryShowTowerEntity(foundationCell, upgradedStats, out int newTowerEntityId))
+            {
+                if (TryShowTowerEntity(foundationCell, oldStats, out int fallbackTowerEntityId))
+                {
+                    _towerEntityIdByFoundationCell[foundationCell] = fallbackTowerEntityId;
+                    _foundationCellByTowerEntityId[fallbackTowerEntityId] = foundationCell;
+                    _towerStatsByEntityId[fallbackTowerEntityId] = CloneTowerStats(oldStats);
+                    _selectedTowerEntityId = fallbackTowerEntityId;
+                }
+
+                GameEntry.CombatNode?.AddCoin(upgradeCost);
+                return false;
+            }
+
+            _towerEntityIdByFoundationCell[foundationCell] = newTowerEntityId;
+            _foundationCellByTowerEntityId[newTowerEntityId] = foundationCell;
+            _towerStatsByEntityId[newTowerEntityId] = CloneTowerStats(upgradedStats);
+            _hasSelectedFoundationCell = true;
+            _selectedFoundationCell = foundationCell;
+            _selectedTowerEntityId = newTowerEntityId;
+            return true;
+        }
+
+        private bool TryDestroyTower()
+        {
+            if (!TryGetSelectedTower(out int towerEntityId, out Vector3Int foundationCell))
+            {
+                return false;
+            }
+
+            HideTowerEntity(towerEntityId);
+            _towerEntityIdByFoundationCell.Remove(foundationCell);
+            _foundationCellByTowerEntityId.Remove(towerEntityId);
+            _towerStatsByEntityId.Remove(towerEntityId);
+            GameEntry.CombatNode?.AddCoin(Mathf.Max(0, _destroyGain));
+
+            ClearSelectedObject();
+            return true;
+        }
+
+        private bool TryGetSelectedTower(out int towerEntityId, out Vector3Int foundationCell)
+        {
+            towerEntityId = 0;
+            foundationCell = default;
+
+            if (_selectedTowerEntityId == 0)
+            {
+                return false;
+            }
+
+            if (!_foundationCellByTowerEntityId.TryGetValue(_selectedTowerEntityId, out foundationCell))
+            {
+                return false;
+            }
+
+            towerEntityId = _selectedTowerEntityId;
+            return true;
+        }
+
+        private bool TryShowTowerEntity(Vector3Int foundationCell, DefenseTowerStatsData towerStats, out int towerEntityId)
+        {
+            towerEntityId = 0;
+            if (GameEntry.Entity == null)
+            {
+                return false;
+            }
+
+            int entityId = GameEntry.Entity.GenerateSerialId();
+            int typeId = _towerTypeId > 0 ? _towerTypeId : DefaultTowerTypeId;
+            Vector3 towerPosition = Tilemap != null ? Tilemap.GetCellCenterWorld(foundationCell) : foundationCell;
+            towerPosition.z = 0f;
+            var towerData = new DefenseTowerData(entityId, typeId, towerPosition, Quaternion.identity, towerStats);
+            GameEntry.Entity.ShowDefenseTower(towerData);
+
+            towerEntityId = entityId;
+            return true;
+        }
+
+        private static void HideTowerEntity(int towerEntityId)
+        {
+            if (towerEntityId == 0 || GameEntry.Entity == null)
+            {
+                return;
+            }
+
+            UnityGameFramework.Runtime.Entity towerEntity = GameEntry.Entity.GetEntity(towerEntityId);
+            if (towerEntity != null)
+            {
+                GameEntry.Entity.HideEntity(towerEntity);
+            }
+        }
+
+        private void ClearPlacedTowers()
+        {
+            _towerEntityIdBuffer.Clear();
+            foreach (KeyValuePair<int, Vector3Int> pair in _foundationCellByTowerEntityId)
+            {
+                _towerEntityIdBuffer.Add(pair.Key);
+            }
+
+            for (int i = 0; i < _towerEntityIdBuffer.Count; i++)
+            {
+                HideTowerEntity(_towerEntityIdBuffer[i]);
+            }
+
+            _towerEntityIdByFoundationCell.Clear();
+            _foundationCellByTowerEntityId.Clear();
+            _towerStatsByEntityId.Clear();
+            _towerEntityIdBuffer.Clear();
+            ClearSelectedObject();
+        }
+
+        private void HideCombatSelectForm()
+        {
+            _combatSelectFormUseCase?.Hide();
+            GameEntry.UIRouter.CloseUI(UIFormType.CombatSelectForm);
+        }
+
+        private void ClearSelectedObject()
+        {
+            _hasSelectedFoundationCell = false;
+            _selectedFoundationCell = default;
+            _selectedTowerEntityId = 0;
+        }
+
+        private int GetBuildTowerCost(int buildIndex)
+        {
+            if (_buildTowerCosts == null || buildIndex < 0 || buildIndex >= _buildTowerCosts.Length)
+            {
+                return 0;
+            }
+
+            return Mathf.Max(0, _buildTowerCosts[buildIndex]);
+        }
+
+        private static bool TryConsumeCoin(int cost)
+        {
+            int requiredCoin = Mathf.Max(0, cost);
+            if (requiredCoin <= 0)
+            {
+                return true;
+            }
+
+            if (GameEntry.CombatNode == null)
+            {
+                return false;
+            }
+
+            return GameEntry.CombatNode.TryConsumeCoin(requiredCoin);
+        }
+
+        private static int GetCurrentCoin()
+        {
+            return GameEntry.CombatNode != null ? Mathf.Max(0, GameEntry.CombatNode.CurrentCoin) : 0;
+        }
+
+        private static DefenseTowerStatsData BuildTowerStats(int buildIndex)
+        {
+            switch (buildIndex)
+            {
+                case 0:
+                    return new DefenseTowerStatsData
+                    {
+                        AttackDamage = 10,
+                        DamageRandomRate = 0f,
+                        RotateSpeed = 200f,
+                        AttackRange = 4.5f,
+                        AttackSpeed = 1.5f,
+                        AttackMethodType = AttackMethodType.NormalBullet,
+                        AttackPropertyType = AttackPropertyType.Physics,
+                        Tags = Array.Empty<TagType>()
+                    };
+                case 1:
+                    return new DefenseTowerStatsData
+                    {
+                        AttackDamage = 13,
+                        DamageRandomRate = 0f,
+                        RotateSpeed = 160f,
+                        AttackRange = 5f,
+                        AttackSpeed = 1.2f,
+                        AttackMethodType = AttackMethodType.NormalBullet,
+                        AttackPropertyType = AttackPropertyType.Fire,
+                        Tags = Array.Empty<TagType>()
+                    };
+                case 2:
+                    return new DefenseTowerStatsData
+                    {
+                        AttackDamage = 17,
+                        DamageRandomRate = 0f,
+                        RotateSpeed = 140f,
+                        AttackRange = 5.5f,
+                        AttackSpeed = 0.95f,
+                        AttackMethodType = AttackMethodType.NormalBullet,
+                        AttackPropertyType = AttackPropertyType.Ice,
+                        Tags = Array.Empty<TagType>()
+                    };
+                case 3:
+                    return new DefenseTowerStatsData
+                    {
+                        AttackDamage = 22,
+                        DamageRandomRate = 0f,
+                        RotateSpeed = 120f,
+                        AttackRange = 6f,
+                        AttackSpeed = 0.75f,
+                        AttackMethodType = AttackMethodType.NormalBullet,
+                        AttackPropertyType = AttackPropertyType.Poison,
+                        Tags = Array.Empty<TagType>()
+                    };
+                default:
+                    return new DefenseTowerStatsData
+                    {
+                        AttackDamage = 10,
+                        DamageRandomRate = 0f,
+                        RotateSpeed = 180f,
+                        AttackRange = 5f,
+                        AttackSpeed = 1f,
+                        AttackMethodType = AttackMethodType.NormalBullet,
+                        AttackPropertyType = AttackPropertyType.Physics,
+                        Tags = Array.Empty<TagType>()
+                    };
+            }
+        }
+
+        private static DefenseTowerStatsData CloneTowerStats(DefenseTowerStatsData source)
+        {
+            if (source == null)
+            {
+                return BuildTowerStats(0);
+            }
+
+            TagType[] copiedTags = source.Tags != null ? (TagType[])source.Tags.Clone() : Array.Empty<TagType>();
+            return new DefenseTowerStatsData
+            {
+                AttackDamage = source.AttackDamage,
+                DamageRandomRate = source.DamageRandomRate,
+                RotateSpeed = source.RotateSpeed,
+                AttackRange = source.AttackRange,
+                AttackSpeed = source.AttackSpeed,
+                AttackMethodType = source.AttackMethodType,
+                AttackPropertyType = source.AttackPropertyType,
+                Tags = copiedTags
+            };
+        }
+
+        private static void ApplyUpgradeToStats(DefenseTowerStatsData stats)
+        {
+            if (stats == null)
+            {
+                return;
+            }
+
+            stats.AttackDamage = Mathf.Max(1, stats.AttackDamage + 3);
+            stats.AttackSpeed = Mathf.Max(0.01f, stats.AttackSpeed + 0.2f);
+            stats.AttackRange = Mathf.Max(0.1f, stats.AttackRange + 0.4f);
+            stats.RotateSpeed = Mathf.Max(1f, stats.RotateSpeed + 10f);
        }
    }
-}
+}