mtgodot-poc/project/herbal_dew_system.gd

# herbal_dew_system.gd —— Metin2 40250 白高草药炼丹酿造与 6 色神圣露水系统 1:1
# 对照 40250 服务端 char_item.cpp, blend.txt, potion.quest 及 NPC 20018 Baek-Go
class_name HerbalDewSystem
extends RefCounted

const NPC_BAEK_GO := 20018
const ITEM_EMPTY_BOTTLE := 70030

# 6 色神圣露水定义 (50821~50826)
const DEW_TABLE: Dictionary = {
	50821: {
		"name": "绿露水",
		"color": "green",
		"stat": "magic_defense",
		"stat_desc": "魔法防御力",
		"min_val": 30,
		"max_val": 70,
		"duration": 600.0, # 10 分钟
		"water_vnum": 50721
	},
	50822: {
		"name": "红露水",
		"color": "red",
		"stat": "critical_pct",
		"stat_desc": "致命一击几率",
		"min_val": 8,
		"max_val": 20,
		"duration": 600.0,
		"water_vnum": 50722
	},
	50823: {
		"name": "蓝露水",
		"color": "blue",
		"stat": "att_grade",
		"stat_desc": "物理攻击力",
		"min_val": 50,
		"max_val": 120,
		"duration": 600.0,
		"water_vnum": 50723
	},
	50824: {
		"name": "白露水",
		"color": "white",
		"stat": "def_grade",
		"stat_desc": "物理防御力",
		"min_val": 40,
		"max_val": 100,
		"duration": 600.0,
		"water_vnum": 50724
	},
	50825: {
		"name": "粉露水",
		"color": "pink",
		"stat": "penetrate_pct",
		"stat_desc": "穿透一击几率",
		"min_val": 8,
		"max_val": 20,
		"duration": 600.0,
		"water_vnum": 50725
	},
	50826: {
		"name": "黄露水",
		"color": "yellow",
		"stat": "att_speed",
		"stat_desc": "攻击速度",
		"min_val": 2,
		"max_val": 8,
		"duration": 600.0,
		"water_vnum": 50726
	}
}

# 草药提炼对应表 (herb_vnum -> water_vnum)
const HERB_TO_WATER: Dictionary = {
	50701: 50721, # 桃花 -> Sim-Water
	50702: 50722, # 风铃草 -> Dok-Water
	50703: 50723, # 柿子花 -> Bo-Water
	50704: 50724, # 高山石斛 -> Young-Water
	50705: 50725, # 紫丁香 -> Zin-Water
	50708: 50726  # 桑椹 -> Sam-Water
}

# 正在生效的露水增益: dew_vnum -> { name, stat, value, duration }
var active_dews: Dictionary = {}

# 1. 在白高处提取草药药水 (原料草药 -> 中间提取液)
static func brew_water(inventory: Array, herb_vnum: int) -> Dictionary:
	if not HERB_TO_WATER.has(herb_vnum):
		return {"ok": false, "reason": "INVALID_HERB", "msg": "此草药无法用于提炼！"}

	var target_water: int = int(HERB_TO_WATER[herb_vnum])
	
	# 消耗草药
	var herb_slot := -1
	for i in range(inventory.size()):
		var it = inventory[i]
		if it != null and int(it.get("vnum", 0)) == herb_vnum:
			herb_slot = i
			break

	if herb_slot == -1:
		return {"ok": false, "reason": "MISSING_HERB", "msg": "背包中缺少所需草药！"}

	inventory[herb_slot] = null

	# 寻找背包空位生成药水提取液
	var empty_slot := -1
	for i in range(inventory.size()):
		if inventory[i] == null:
			empty_slot = i
			break

	if empty_slot == -1:
		return {"ok": false, "reason": "INVENTORY_FULL", "msg": "背包已满！"}

	inventory[empty_slot] = {"vnum": target_water, "count": 1}
	return {"ok": true, "water_vnum": target_water, "slot": empty_slot}

# 2. 在白高处合成露水 (药水提取液 + 空瓶 70030 -> 神圣露水)
static func brew_dew(inventory: Array, dew_vnum: int, force_max_roll: bool = false) -> Dictionary:
	if not DEW_TABLE.has(dew_vnum):
		return {"ok": false, "reason": "INVALID_DEW"}

	var cfg: Dictionary = DEW_TABLE[dew_vnum]
	var req_water: int = int(cfg["water_vnum"])

	var water_slot := -1
	var bottle_slot := -1

	for i in range(inventory.size()):
		var it = inventory[i]
		if it != null:
			var v: int = int(it.get("vnum", 0))
			if v == req_water and water_slot == -1:
				water_slot = i
			elif v == ITEM_EMPTY_BOTTLE and bottle_slot == -1:
				bottle_slot = i

	if water_slot == -1:
		return {"ok": false, "reason": "MISSING_WATER", "msg": "缺少对应的草药提取水剂！"}
	if bottle_slot == -1:
		return {"ok": false, "reason": "MISSING_BOTTLE", "msg": "缺少用于盛装露水的空药瓶 (70030)！"}

	# 扣除水剂与空药瓶
	inventory[water_slot] = null
	inventory[bottle_slot] = null

	# 抽取露水品质数值 (min_val ~ max_val)
	var min_v: int = int(cfg["min_val"])
	var max_v: int = int(cfg["max_val"])
	var roll_val: int = max_v if force_max_roll else randi_range(min_v, max_v)

	var dew_item: Dictionary = {
		"vnum": dew_vnum,
		"name": cfg["name"],
		"value": roll_val,
		"duration": float(cfg["duration"])
	}

	# 存入背包
	var stored_slot := -1
	for i in range(inventory.size()):
		if inventory[i] == null:
			inventory[i] = dew_item
			stored_slot = i
			break

	return {
		"ok": true,
		"dew_vnum": dew_vnum,
		"name": cfg["name"],
		"value": roll_val,
		"slot": stored_slot,
		"stat_desc": cfg["stat_desc"],
		"msg": "成功酿造出【%s】！品质增幅：%s +%d！" % [cfg["name"], cfg["stat_desc"], roll_val]
	}

# 3. 饮用露水获得增益
func drink_dew(item: Dictionary) -> Dictionary:
	var vnum: int = int(item.get("vnum", 0))
	if not DEW_TABLE.has(vnum):
		return {"ok": false, "reason": "NOT_A_DEW"}

	var cfg: Dictionary = DEW_TABLE[vnum]
	var roll_val: int = int(item.get("value", cfg["min_val"]))

	active_dews[vnum] = {
		"name": cfg["name"],
		"stat": cfg["stat"],
		"value": roll_val,
		"duration": float(cfg["duration"]),
		"total_duration": float(cfg["duration"])
	}

	return {
		"ok": true,
		"dew_vnum": vnum,
		"name": cfg["name"],
		"stat": cfg["stat"],
		"value": roll_val,
		"duration": float(cfg["duration"])
	}

# 逐帧更新倒计时
func update(dt: float) -> Array[int]:
	var expired: Array[int] = []
	for vnum in active_dews.keys():
		var data: Dictionary = active_dews[vnum]
		data["duration"] = maxf(0.0, float(data["duration"]) - dt)
		if float(data["duration"]) <= 0.0:
			expired.append(vnum)

	for vnum in expired:
		active_dews.erase(vnum)

	return expired

# 查询某项属性在当前露水中的总加成
func get_stat_bonus(stat_name: String) -> int:
	var total := 0
	for vnum in active_dews:
		var data: Dictionary = active_dews[vnum]
		if String(data.get("stat", "")) == stat_name:
			total += int(data.get("value", 0))
	return total

func has_dew(vnum: int) -> bool:
	return active_dews.has(vnum)