# pk_penalty_system.gd —— Metin2 40250 恶名红名掉落惩罚与露西之戒保护 1:1
# 对照 40250 服务端 char_battle.cpp, char.cpp, Item 70043, 70102, 70048
class_name PkPenaltySystem
extends RefCounted

signal lucy_ring_protected()
signal item_dropped_on_death(item: Dictionary)
signal alignment_restored(new_alignment: int)

const MIN_PENALTY_LEVEL := 50
const ITEM_LUCY_RING := 70043       # 露西之戒
const ITEM_ZEN_BEAN := 70102        # 禅豆 (+500 善恶值洗恶名)
const ITEM_CLOAK_OF_PEACE := 70048  # 和平披风 (隐匿红名)

# 负善恶值掉落几率表 (40250 char_battle.cpp 1:1)
static func get_death_drop_chance(alignment: int) -> float:
	if alignment >= 0:
		return 0.0
	elif alignment >= -3999: # 凶恶
		return 0.05
	elif alignment >= -7999: # 歹毒
		return 0.10
	elif alignment >= -11999: # 恶贯满盈
		return 0.15
	else: # <= -12000 嗜血魔王
		return 0.25

# 死亡掉落综合判定
func process_death_penalty(
	player_level: int,
	alignment: int,
	equipment: Dictionary,
	inventory: Array,
	forced_roll: float = -1.0
) -> Dictionary:
	# 1. 50 级以下或非红名(>=0) 免除一切死亡掉落
	if player_level < MIN_PENALTY_LEVEL or alignment >= 0:
		return {
			"dropped": false,
			"reason": "SAFE_LEVEL_OR_POSITIVE_KARMA",
			"msg": "受新手保护或和平声望庇佑，免于死亡惩罚。"
		}

	# 2. 检查是否佩戴露西之戒 (70043)
	var has_lucy_ring := false
	var ring_slot_key = ""
	for eq_key in equipment.keys():
		var eq = equipment[eq_key]
		if eq != null and int(eq.get("vnum", 0)) == ITEM_LUCY_RING:
			has_lucy_ring = true
			ring_slot_key = eq_key
			break

	if has_lucy_ring:
		# 露西之戒替死碎裂，阻断掉落
		equipment[ring_slot_key] = null
		lucy_ring_protected.emit()
		return {
			"dropped": false,
			"ring_shattered": true,
			"msg": "【露西之戒】替你承受了死亡的厄运，戒指粉碎瓦解，身上物品完好无损！"
		}

	# 3. 计算掉落几率
	var chance := get_death_drop_chance(alignment)
	var roll := forced_roll if forced_roll >= 0.0 else randf()

	if roll > chance:
		return {
			"dropped": false,
			"reason": "LUCKY_ROLL",
			"msg": "幸运未触发掉落惩罚。"
		}

	# 4. 寻找可掉落的物品 (已锁定的物品 is_locked 严禁掉落)
	var droppable_candidates: Array = []

	# 从未锁定装备中搜寻
	for eq_key in equipment.keys():
		var it = equipment[eq_key]
		if it != null and not it.get("is_locked", false):
			droppable_candidates.append({"type": "equip", "key": eq_key, "item": it})

	# 从未锁定背包中搜寻
	for i in range(inventory.size()):
		var it = inventory[i]
		if it != null and not it.get("is_locked", false):
			droppable_candidates.append({"type": "inv", "slot": i, "item": it})

	if droppable_candidates.is_empty():
		return {
			"dropped": false,
			"reason": "ALL_ITEMS_PROTECTED",
			"msg": "身上的所有贵重物品均处于安全加锁保护中，未发生掉落！"
		}

	# 掉落一件物品
	var chosen = droppable_candidates[randi() % droppable_candidates.size()]
	var dropped_item: Dictionary = chosen["item"].duplicate(true)

	if chosen["type"] == "equip":
		equipment[chosen["key"]] = null
	else:
		inventory[chosen["slot"]] = null

	item_dropped_on_death.emit(dropped_item)

	return {
		"dropped": true,
		"dropped_item": dropped_item,
		"msg": "恶名昭彰！你被击杀，珍贵物品【%s】散落到了地面！" % dropped_item.get("name", "物品")
	}

# 使用禅豆 (70102) 消除 500 点恶名
func use_zen_bean(
	slot_idx: int,
	inventory: Array,
	current_alignment: int
) -> Dictionary:
	if slot_idx < 0 or slot_idx >= inventory.size():
		return {"ok": false, "reason": "INVALID_SLOT"}

	var it = inventory[slot_idx]
	if it == null or int(it.get("vnum", 0)) != ITEM_ZEN_BEAN:
		return {"ok": false, "reason": "NOT_ZEN_BEAN", "msg": "这不是禅豆！"}

	if current_alignment >= 0:
		return {
			"ok": false,
			"reason": "NOT_EVIL",
			"msg": "你的名声本就光明清白，无需服用禅豆洗去恶名。"
		}

	# 消耗禅豆
	var cnt: int = int(it.get("count", 1))
	if cnt <= 1:
		inventory[slot_idx] = null
	else:
		it["count"] = cnt - 1

	# 回复 500 点善恶值 (上限为 0)
	var new_alignment: int = mini(0, current_alignment + 500)
	alignment_restored.emit(new_alignment)

	return {
		"ok": true,
		"old_alignment": current_alignment,
		"new_alignment": new_alignment,
		"restored": 500,
		"msg": "服用了禅豆，心灵得到了净化，恶名值减少了 500 点！"
	}

# 判定和平披风 (70048) 是否隐匿红名
func is_red_name_hidden(equipment: Dictionary) -> bool:
	for eq in equipment.values():
		if eq != null and int(eq.get("vnum", 0)) == ITEM_CLOAK_OF_PEACE:
			return true
	return false