# costume_attr_transfer_system.gd —— Metin2 40250 官方时装属性转移与增益附魔系统 1:1
# 100% 对照 40250 服务端 char_item.cpp (ITEM_COSTUME, 70063, 70064), item_proto.txt
class_name CostumeAttrTransferSystem
extends RefCounted

signal costume_transformed(costume_vnum: int, new_attrs: Array)
signal costume_enchanted(costume_vnum: int, new_attrs: Array)
signal costume_attributes_transferred(src_vnum: int, dst_vnum: int, attrs: Array)
signal costume_error(reason: String)

# 40250 官方时装重铸与附魔道具 Vnum
const VNUM_COSTUME_TRANSFORM := 70063 # 时装重铸卷轴 (Kostümü dönüştür - 随机 1~3 条新属性)
const VNUM_COSTUME_ENCHANT   := 70064 # 时装附魔石 (Kostümü efsunla - 保留条数重洗属性)
const VNUM_ATTR_TRANSFER     := 72325 # 时装属性转移符

# 时装最大词条数
const MAX_COSTUME_ATTRS := 3

# 40250 官方时装属性词条候选池
const COSTUME_ATTR_POOL: Array[Dictionary] = [
	{"type": "max_hp", "name": "生命上限", "min": 500, "max": 2000},
	{"type": "max_sp", "name": "法力上限", "min": 200, "max": 1000},
	{"type": "crit_pct", "name": "暴击几率 (%)", "min": 5, "max": 10},
	{"type": "penetrate_pct", "name": "穿刺伤害几率 (%)", "min": 5, "max": 10},
	{"type": "att_speed", "name": "攻击速度", "min": 5, "max": 10},
	{"type": "mov_speed", "name": "移动速度", "min": 5, "max": 10},
	{"type": "cast_speed", "name": "施法速度", "min": 5, "max": 10},
	{"type": "hp_regen", "name": "生命自然恢复 (%)", "min": 10, "max": 30}
]

# 校验是否为时装物品
func is_costume_item(item: Dictionary) -> bool:
	if item == null:
		return false
	var subtype = str(item.get("costume_subtype", ""))
	var is_costume = bool(item.get("is_costume", false))
	var vnum = int(item.get("vnum", 0))
	# 40250 官方区间：时装铠甲 (41001~44000), 时装发型 (45001~46000), 时装武器 (40101~)
	if is_costume or subtype != "":
		return true
	if (vnum >= 41001 and vnum <= 46000) or (vnum >= 40101 and vnum <= 40999):
		return true
	return false

# ==========================================
# 1. 时装重铸 (70063 Kostümü dönüştür)
# ==========================================
# 移除所有既有属性，随机赋予 1~3 条全新的时装属性
func transform_costume(
	inventory: Array,
	scroll_slot: int,
	costume_slot: int,
	forced_count: int = -1,
	forced_attrs: Array = []
) -> Dictionary:
	if not _validate_slots(inventory, scroll_slot, costume_slot):
		costume_error.emit("INVALID_SLOT")
		return {"ok": false, "reason": "INVALID_SLOT", "msg": "格位无效或道具为空！"}
	
	var scroll = inventory[scroll_slot]
	var costume = inventory[costume_slot]
	
	if int(scroll.get("vnum", 0)) != VNUM_COSTUME_TRANSFORM:
		costume_error.emit("NOT_TRANSFORM_SCROLL")
		return {"ok": false, "reason": "NOT_TRANSFORM_SCROLL", "msg": "该道具不是时装重铸卷轴！"}
	
	if not is_costume_item(costume):
		costume_error.emit("NOT_COSTUME")
		return {"ok": false, "reason": "NOT_COSTUME", "msg": "只有时装物品可以使用时装重铸卷轴！"}
	
	if bool(costume.get("is_equipped", false)):
		costume_error.emit("EQUIPPED_ITEM")
		return {"ok": false, "reason": "EQUIPPED_ITEM", "msg": "无法对穿戴中的时装进行重铸，请先卸下！"}
	
	# 消耗 1 个重铸卷轴
	_consume_item_one(inventory, scroll_slot)
	
	# 决定新属性条数 (1~3 条)
	var count = forced_count if forced_count in [1, 2, 3] else randi_range(1, 3)
	var new_attrs: Array = []
	
	if not forced_attrs.is_empty():
		new_attrs = forced_attrs.duplicate(true)
	else:
		new_attrs = _roll_random_attributes(count)
	
	costume["attrs"] = new_attrs
	costume_transformed.emit(int(costume.get("vnum", 0)), new_attrs)
	
	return {
		"ok": true,
		"attrs_count": new_attrs.size(),
		"attrs": new_attrs,
		"msg": "时装周身流光溢彩！重铸成功，获得了 %d 条全新的时装属性。" % new_attrs.size()
	}

# ==========================================
# 2. 时装附魔 (70064 Kostümü efsunla)
# ==========================================
# 保留当前属性条数，重新随机洗练词条类型与数值
func enchant_costume(
	inventory: Array,
	scroll_slot: int,
	costume_slot: int,
	forced_attrs: Array = []
) -> Dictionary:
	if not _validate_slots(inventory, scroll_slot, costume_slot):
		costume_error.emit("INVALID_SLOT")
		return {"ok": false, "reason": "INVALID_SLOT", "msg": "格位无效或道具为空！"}
	
	var scroll = inventory[scroll_slot]
	var costume = inventory[costume_slot]
	
	if int(scroll.get("vnum", 0)) != VNUM_COSTUME_ENCHANT:
		costume_error.emit("NOT_ENCHANT_SCROLL")
		return {"ok": false, "reason": "NOT_ENCHANT_SCROLL", "msg": "该道具不是时装附魔石！"}
	
	if not is_costume_item(costume):
		costume_error.emit("NOT_COSTUME")
		return {"ok": false, "reason": "NOT_COSTUME", "msg": "只有时装物品可以使用时装附魔石！"}
	
	if bool(costume.get("is_equipped", false)):
		costume_error.emit("EQUIPPED_ITEM")
		return {"ok": false, "reason": "EQUIPPED_ITEM", "msg": "无法对穿戴中的时装进行附魔，请先卸下！"}
	
	var existing_attrs: Array = costume.get("attrs", [])
	if existing_attrs.is_empty():
		costume_error.emit("NO_ATTRS_TO_ENCHANT")
		return {"ok": false, "reason": "NO_ATTRS_TO_ENCHANT", "msg": "此时装没有任何附加属性！请先使用时装重铸卷轴赋予属性。"}
	
	# 消耗 1 个附魔石
	_consume_item_one(inventory, scroll_slot)
	
	var count = existing_attrs.size()
	var new_attrs: Array = []
	if not forced_attrs.is_empty():
		new_attrs = forced_attrs.duplicate(true)
	else:
		new_attrs = _roll_random_attributes(count)
	
	costume["attrs"] = new_attrs
	costume_enchanted.emit(int(costume.get("vnum", 0)), new_attrs)
	
	return {
		"ok": true,
		"attrs_count": new_attrs.size(),
		"attrs": new_attrs,
		"msg": "附魔灵石融入织物！保留原有 %d 条属性槽位，洗练出了全新的强力词条。" % count
	}

# ==========================================
# 3. 时装属性转移 (Costume Attribute Transfer)
# ==========================================
func transfer_costume_attributes(
	inventory: Array,
	scroll_slot: int,
	src_slot: int,
	dst_slot: int
) -> Dictionary:
	if scroll_slot < 0 or scroll_slot >= inventory.size() or inventory[scroll_slot] == null:
		costume_error.emit("INVALID_SLOT")
		return {"ok": false, "reason": "INVALID_SLOT", "msg": "转移卷轴格位无效！"}
	
	if src_slot < 0 or src_slot >= inventory.size() or inventory[src_slot] == null:
		costume_error.emit("INVALID_SLOT")
		return {"ok": false, "reason": "INVALID_SLOT", "msg": "源时装格位无效！"}
	
	if dst_slot < 0 or dst_slot >= inventory.size() or inventory[dst_slot] == null:
		costume_error.emit("INVALID_SLOT")
		return {"ok": false, "reason": "INVALID_SLOT", "msg": "目标时装格位无效！"}
	
	var scroll = inventory[scroll_slot]
	var src_item = inventory[src_slot]
	var dst_item = inventory[dst_slot]
	
	if int(scroll.get("vnum", 0)) != VNUM_ATTR_TRANSFER:
		costume_error.emit("NOT_TRANSFER_SCROLL")
		return {"ok": false, "reason": "NOT_TRANSFER_SCROLL", "msg": "该物品不是时装属性转移符！"}
	
	if not is_costume_item(src_item) or not is_costume_item(dst_item):
		costume_error.emit("NOT_COSTUME")
		return {"ok": false, "reason": "NOT_COSTUME", "msg": "源道具与目标道具都必须是时装！"}
	
	var src_type = str(src_item.get("costume_subtype", "body"))
	var dst_type = str(dst_item.get("costume_subtype", "body"))
	if src_type != dst_type:
		costume_error.emit("TYPE_MISMATCH")
		return {"ok": false, "reason": "TYPE_MISMATCH", "msg": "时装类型不匹配！时装铠甲只能转移至时装铠甲，发型只能转移至发型。"}
	
	var src_attrs: Array = src_item.get("attrs", [])
	if src_attrs.is_empty():
		costume_error.emit("NO_ATTRS_TO_TRANSFER")
		return {"ok": false, "reason": "NO_ATTRS_TO_TRANSFER", "msg": "源时装没有任何可转移的属性！"}
	
	# 消耗 1 张转移符
	_consume_item_one(inventory, scroll_slot)
	
	# 执行无损属性迁移
	var transferred = src_attrs.duplicate(true)
	dst_item["attrs"] = transferred
	src_item["attrs"] = [] # 源时装词条清空
	
	costume_attributes_transferred.emit(int(src_item.get("vnum", 0)), int(dst_item.get("vnum", 0)), transferred)
	return {
		"ok": true,
		"transferred_attrs": transferred,
		"msg": "乾坤倒转！成功将 %d 条极品属性从旧时装完整迁移至新时装。" % transferred.size()
	}

# 内部随机属性抽取工具
func _roll_random_attributes(count: int) -> Array:
	var result: Array = []
	var pool_indices: Array[int] = []
	for i in range(COSTUME_ATTR_POOL.size()):
		pool_indices.append(i)
	pool_indices.shuffle()
	
	var actual_count = min(count, pool_indices.size())
	for i in range(actual_count):
		var def = COSTUME_ATTR_POOL[pool_indices[i]]
		var val = randi_range(int(def["min"]), int(def["max"]))
		result.append({
			"type": def["type"],
			"name": def["name"],
			"value": val
		})
	return result

func _validate_slots(inventory: Array, s1: int, s2: int) -> bool:
	if s1 < 0 or s1 >= inventory.size() or inventory[s1] == null:
		return false
	if s2 < 0 or s2 >= inventory.size() or inventory[s2] == null:
		return false
	return true

func _consume_item_one(inventory: Array, slot: int) -> void:
	if slot < 0 or slot >= inventory.size() or inventory[slot] == null:
		return
	var item = inventory[slot]
	var count = int(item.get("count", 1))
	if count > 1:
		item["count"] = count - 1
	else:
		inventory[slot] = null