# costume_system.gd —— Metin2 40250 独立时装发型与武器衣柜系统 1:1
# 对照 40250 服务端 costume.cpp, char_item.cpp, uiinventory.py, item_data.h
class_name CostumeSystem
extends RefCounted

signal costume_equipped(slot_type: int, item: Dictionary)
signal costume_unequipped(slot_type: int)
signal costume_expired(slot_type: int, item_name: String)

enum CostumeSlot {
	COSTUME_BODY = 0,   # 时装衣服
	COSTUME_HAIR = 1,   # 时装发型
	COSTUME_WEAPON = 2  # 时装武器外观
}

const DEFAULT_COSTUME_DURATION := 604800.0 # 默认 7 天 (7 * 86400)

var equipped_costumes: Dictionary = {
	CostumeSlot.COSTUME_BODY: null,
	CostumeSlot.COSTUME_HAIR: null,
	CostumeSlot.COSTUME_WEAPON: null
}

# 穿戴时装
func equip_costume(slot_type: int, costume_item: Dictionary) -> Dictionary:
	if not equipped_costumes.has(slot_type):
		return {"ok": false, "reason": "INVALID_SLOT", "msg": "无效的时装栏位！"}

	if costume_item.is_empty():
		return {"ok": false, "reason": "EMPTY_ITEM", "msg": "时装物品数据为空！"}

	# 校验时装部位匹配
	var c_type: String = costume_item.get("costume_type", "")
	match slot_type:
		CostumeSlot.COSTUME_BODY:
			if c_type != "body":
				return {"ok": false, "reason": "SLOT_TYPE_MISMATCH", "msg": "此物品不是时装衣服！"}
		CostumeSlot.COSTUME_HAIR:
			if c_type != "hair":
				return {"ok": false, "reason": "SLOT_TYPE_MISMATCH", "msg": "此物品不是时装发型！"}
		CostumeSlot.COSTUME_WEAPON:
			if c_type != "weapon":
				return {"ok": false, "reason": "SLOT_TYPE_MISMATCH", "msg": "此物品不是时装武器外观！"}

	var old_item = equipped_costumes[slot_type]
	var item_to_equip = costume_item.duplicate(true)

	if not item_to_equip.has("remaining_time"):
		item_to_equip["remaining_time"] = DEFAULT_COSTUME_DURATION

	equipped_costumes[slot_type] = item_to_equip

	costume_equipped.emit(slot_type, item_to_equip)

	return {
		"ok": true,
		"slot_type": slot_type,
		"item": item_to_equip,
		"old_item": old_item,
		"msg": "时装【%s】已成功穿戴！" % item_to_equip.get("name", "时装")
	}

# 卸下时装
func unequip_costume(slot_type: int) -> Dictionary:
	if not equipped_costumes.has(slot_type):
		return {"ok": false, "reason": "INVALID_SLOT", "msg": "无效的时装栏位！"}

	var item = equipped_costumes[slot_type]
	if item == null:
		return {"ok": false, "reason": "SLOT_EMPTY", "msg": "该时装栏位未穿戴时装！"}

	equipped_costumes[slot_type] = null
	costume_unequipped.emit(slot_type)

	return {
		"ok": true,
		"slot_type": slot_type,
		"item": item,
		"msg": "已卸下时装【%s】。" % item.get("name", "时装")
	}

# 汇总所有已穿戴时装的战力属性
func get_costume_bonuses() -> Dictionary:
	var total_bonuses: Dictionary = {}
	for slot in equipped_costumes.keys():
		var it = equipped_costumes[slot]
		if it == null:
			continue
		var bonuses: Dictionary = it.get("bonuses", {})
		for b_key in bonuses.keys():
			var val: int = int(bonuses[b_key])
			total_bonuses[b_key] = total_bonuses.get(b_key, 0) + val
	return total_bonuses

# 获取 3D 外观覆盖模型 ID
func get_appearance_overrides() -> Dictionary:
	var overrides: Dictionary = {
		"body_model": 0,
		"hair_model": 0,
		"weapon_model": 0
	}
	if equipped_costumes[CostumeSlot.COSTUME_BODY] != null:
		overrides["body_model"] = int(equipped_costumes[CostumeSlot.COSTUME_BODY].get("model_id", 0))
	if equipped_costumes[CostumeSlot.COSTUME_HAIR] != null:
		overrides["hair_model"] = int(equipped_costumes[CostumeSlot.COSTUME_HAIR].get("model_id", 0))
	if equipped_costumes[CostumeSlot.COSTUME_WEAPON] != null:
		overrides["weapon_model"] = int(equipped_costumes[CostumeSlot.COSTUME_WEAPON].get("model_id", 0))
	return overrides

# 逐帧时效衰减更新
func update(dt: float) -> Array:
	var expired_list: Array = []
	for slot in equipped_costumes.keys():
		var it = equipped_costumes[slot]
		if it == null:
			continue

		it["remaining_time"] = maxf(0.0, float(it.get("remaining_time", 0.0)) - dt)
		if it["remaining_time"] <= 0.0:
			var iname: String = it.get("name", "时装")
			expired_list.append({"slot": slot, "item": it})
			equipped_costumes[slot] = null
			costume_expired.emit(slot, iname)
			costume_unequipped.emit(slot)

	return expired_list