87 lines
2.7 KiB
GDScript
87 lines
2.7 KiB
GDScript
## ShopManager — 商店管理（Autoload: ShopManager）
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## S2 范围：3 选 1 法术、金币扣减、刷新费用公式（P6-N23）
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## 权威来源：development_plan.md S2、numerical_design.md §2.3
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extends Node
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signal shop_refreshed
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signal shop_closed
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const SLOT_COUNT: int = 3
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const REROLL_BASE_COST: int = 20 # 第 1 次刷新费用
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const REROLL_STEP: int = 10 # 每次递增价格
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var current_slots: Array = [] # Array[SpellNode] （null 表示已售出）
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var reroll_count: int = 0 # 本波已刷新次数（WAVE_COMPLETE 后重置）
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var _shop_seed: int = 0 # 随机种（ADR-A2 P-S2-07）
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var _rng: RandomNumberGenerator = RandomNumberGenerator.new()
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func _ready() -> void:
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EventBus.subscribe(EventID.WAVE_COMPLETE, _on_wave_complete)
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func _on_wave_complete(_payload: Dictionary) -> void:
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reroll_count = 0 # P6-N23：波次结算后重置刷新次数
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func open_shop(seed_override: int = -1) -> void:
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if seed_override >= 0:
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_shop_seed = seed_override
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else:
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_shop_seed = randi()
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_rng.seed = _shop_seed
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_refresh_slots()
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EventBus.emit(EventID.SHOP_OPENED, {"seed": _shop_seed})
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func _refresh_slots() -> void:
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# 纯数据驱动池：SpellRegistry（data/spells.json）中可购买（shop_cost>0）的法术
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var pool: Array = SpellRegistry.get_all_ids().filter(func(id):
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var s: SpellNode = SpellRegistry.get_spell(id)
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return s != null and int(s.meta.get("shop_cost", 0)) > 0)
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current_slots.clear()
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for _i in SLOT_COUNT:
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if pool.is_empty():
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current_slots.append(null)
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continue
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var idx: int = _rng.randi_range(0, pool.size() - 1)
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current_slots.append(SpellRegistry.get_spell(pool[idx]))
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pool.remove_at(idx)
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shop_refreshed.emit()
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## 购买指定槽位的法术，返回购买的 SpellNode、失败返回 null
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func buy_spell(slot_idx: int) -> SpellNode:
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if slot_idx < 0 or slot_idx >= current_slots.size():
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return null
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var spell: SpellNode = current_slots[slot_idx]
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if spell == null:
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return null
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var cost: int = int(spell.meta.get("shop_cost", 20))
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if not PlayerStats.spend_gold(cost):
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return null
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current_slots[slot_idx] = null
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shop_refreshed.emit()
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return spell
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## 刷新商店，返回 true 表示成功
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func reroll() -> bool:
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var cost: int = get_reroll_cost()
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if not PlayerStats.spend_gold(cost):
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return false
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reroll_count += 1
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_rng.seed = _shop_seed + reroll_count * 31337
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_refresh_slots()
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return true
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## 刷新费用公式：base + step * reroll_count（P6-N23）
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func get_reroll_cost() -> int:
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return REROLL_BASE_COST + reroll_count * REROLL_STEP
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func close_shop() -> void:
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current_slots.clear()
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shop_closed.emit()
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func get_shop_seed() -> int:
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return _shop_seed
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func reset() -> void:
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current_slots.clear()
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reroll_count = 0
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_shop_seed = 0
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