# jewelry_socket_system.gd —— Metin2 40250 首饰饰品金刚石打孔与精炼宝石镶嵌 1:1
# 对照 40250 服务端 char_item.cpp (PutGemInAccessory), item_attribute.cpp
class_name JewelrySocketSystem
extends RefCounted

const ITEM_DIAMOND := 50621 # 精炼金刚石
const MAX_SOCKETS := 3
const GEM_LIFETIME_SECS := 86400.0 # 24 小时战斗佩戴寿命

# 饰品支持打孔的分类 (14:手镯, 16:项链, 17:耳环)
const VALID_ACCESSORY_PREFIXES := [14, 16, 17]

# 饰品材质与对应精炼宝石映射 (base_vnum_pattern -> gem_vnum)
const ACCESSORY_GEM_MAPPING: Dictionary = {
	"copper": 50624,      # 铜首饰 -> 铜 50624
	"silver": 50625,      # 银首饰 -> 银 50625
	"gold": 50626,        # 金首饰 -> 金 50626
	"jade": 50627,        # 玉首饰 -> 玉 50627
	"ebony": 50628,       # 黑檀首饰 -> 黑檀 50628
	"pearl": 50629,       # 珍珠首饰 -> 珍珠 50629
	"white_gold": 50630,  # 白金首饰 -> 白金 50630
	"crystal": 50631,     # 水晶首饰 -> 水晶 50631
	"amethyst": 50632,    # 紫晶首饰 -> 紫晶 50632
	"heavens_tear": 50633,# 天泪首饰 -> 天泪石 50633
	"soul_crystal": 50634,# 灵魂水晶首饰 -> 灵魂水晶 50634
	"ruby": 50635,        # 红宝石首饰 -> 红宝石 50635
	"garnet": 50636,      # 石榴石首饰 -> 石榴石 50636
	"emerald": 50637,     # 绿宝石首饰 -> 绿宝石 50637
	"sapphire": 50638     # 蓝宝石首饰 -> 蓝宝石 50638
}

# 打孔成功率 (0孔打第1孔: 70%, 1孔打第2孔: 50%, 2孔打第3孔: 30%)
const DRILL_CHANCES: Array[float] = [0.70, 0.50, 0.30]

# 宝石阶梯增益百分比 (第1孔: +10%, 第2孔: +10%, 第3孔: +20%)
const GEM_BONUS_TIERS: Array[float] = [0.10, 0.10, 0.20]

static func is_accessory(item: Dictionary) -> bool:
	var vnum: int = int(item.get("vnum", 0))
	var prefix: int = int(floor(float(vnum) / 1000.0))
	return prefix in VALID_ACCESSORY_PREFIXES

# 检查是否可用金刚石打孔
static func can_drill_socket(item: Dictionary) -> Dictionary:
	if not is_accessory(item):
		return {"ok": false, "reason": "NOT_ACCESSORY", "msg": "金刚石只能用于手镯、项链或耳环打孔！"}

	var socket_count: int = int(item.get("socket_count", 0))
	if socket_count >= MAX_SOCKETS:
		return {"ok": false, "reason": "SOCKETS_FULL", "msg": "该首饰已拥有最大的 3 个宝石孔槽！"}

	return {"ok": true, "current_sockets": socket_count}

# 使用金刚石 50621 打孔
static func drill_socket(item: Dictionary, diamond_slot_item: Dictionary, force_success: bool = false) -> Dictionary:
	var check = can_drill_socket(item)
	if not check["ok"]:
		return check

	var dvnum: int = int(diamond_slot_item.get("vnum", 0))
	if dvnum != ITEM_DIAMOND:
		return {"ok": false, "reason": "NOT_DIAMOND", "msg": "打孔必须使用精炼金刚石！"}

	var current_sockets: int = int(item.get("socket_count", 0))
	var chance: float = DRILL_CHANCES[current_sockets]
	var roll: float = 0.0 if force_success else randf()
	var success: bool = roll < chance

	if not item.has("sockets"):
		item["sockets"] = [0, 0, 0]
	if not item.has("gem_times"):
		item["gem_times"] = [0.0, 0.0, 0.0]

	if success:
		item["socket_count"] = current_sockets + 1
		return {
			"ok": true,
			"success": true,
			"socket_count": item["socket_count"],
			"msg": "打孔成功！已开辟出第 %d 个宝石孔槽！" % item["socket_count"]
		}
	else:
		return {
			"ok": true,
			"success": false,
			"socket_count": current_sockets,
			"msg": "打孔失败！金刚石破碎，未能开出孔槽。"
		}

# 镶嵌精炼矿石宝石
static func insert_gem(item: Dictionary, gem_item: Dictionary, required_gem_vnum: int = 0) -> Dictionary:
	if not is_accessory(item):
		return {"ok": false, "reason": "NOT_ACCESSORY"}

	var socket_count: int = int(item.get("socket_count", 0))
	if socket_count <= 0:
		return {"ok": false, "reason": "NO_SOCKETS_DRILLED", "msg": "该首饰尚未打孔，请先使用金刚石开孔！"}

	if not item.has("sockets"):
		item["sockets"] = [0, 0, 0]
	if not item.has("gem_times"):
		item["gem_times"] = [0.0, 0.0, 0.0]

	# 查找第一个空孔
	var empty_slot := -1
	for i in range(socket_count):
		if int(item["sockets"][i]) == 0:
			empty_slot = i
			break

	if empty_slot == -1:
		return {"ok": false, "reason": "NO_EMPTY_SOCKET", "msg": "所有已开辟的孔槽都已镶嵌满宝石！"}

	var gem_vnum: int = int(gem_item.get("vnum", 0))
	if gem_vnum < 50622 or gem_vnum > 50638:
		return {"ok": false, "reason": "INVALID_GEM", "msg": "这不是有效的精炼宝石！"}

	if required_gem_vnum > 0 and gem_vnum != required_gem_vnum:
		return {"ok": false, "reason": "GEM_MISMATCH", "msg": "此宝石与该首饰材质不匹配！"}

	# 镶嵌成功
	item["sockets"][empty_slot] = gem_vnum
	item["gem_times"][empty_slot] = GEM_LIFETIME_SECS

	var active_gems := count_active_gems(item)
	var bonus_pct := calculate_bonus_percentage(active_gems)

	return {
		"ok": true,
		"slot": empty_slot,
		"gem_vnum": gem_vnum,
		"active_gems": active_gems,
		"total_bonus_pct": bonus_pct,
		"lifetime": GEM_LIFETIME_SECS,
		"msg": "宝石成功镶入第 %d 个孔槽！固有属性提升 %d%%！" % [empty_slot + 1, int(round(bonus_pct * 100))]
	}

# 统计当前生效的宝石数量
static func count_active_gems(item: Dictionary) -> int:
	var count := 0
	var sockets: Array = item.get("sockets", [])
	var times: Array = item.get("gem_times", [])
	for i in range(sockets.size()):
		if int(sockets[i]) > 0 and float(times[i]) > 0.0:
			count += 1
	return count

# 计算宝石提供的总属性加成百分比 (0~3 颗宝石)
static func calculate_bonus_percentage(gem_count: int) -> float:
	var pct: float = 0.0
	for i in range(mini(gem_count, GEM_BONUS_TIERS.size())):
		pct += GEM_BONUS_TIERS[i]
	return pct

# 佩戴战斗时间自然衰减 (dt: 秒)
static func update_gem_endurance(item: Dictionary, dt: float) -> Dictionary:
	var expired_gems: Array[int] = []
	if not item.has("sockets") or not item.has("gem_times"):
		return {"expired": expired_gems}

	var sockets: Array = item["sockets"]
	var times: Array = item["gem_times"]

	for i in range(sockets.size()):
		if int(sockets[i]) > 0 and float(times[i]) > 0.0:
			times[i] = maxf(0.0, float(times[i]) - dt)
			if float(times[i]) <= 0.0:
				expired_gems.append(int(sockets[i]))
				sockets[i] = 0 # 宝石破碎，孔槽重新清空

	return {
		"expired": expired_gems,
		"active_gems": count_active_gems(item),
		"total_bonus_pct": calculate_bonus_percentage(count_active_gems(item))
	}