# devils_catacomb_system.gd —— Metin2 40250 地下墓穴 7 层与冥王阿兹瑞尔挑战副本 1:1
# 对照 40250 服务端 devils_catacomb.quest, dungeon.cpp, char_battle.cpp, mob 2598, 2597, 2596
class_name DevilsCatacombSystem
extends RefCounted

signal floor_advanced(floor: int)
signal metin_destroyed(is_correct: bool)
signal tartaros_killed(drop_item: Dictionary)
signal obelisk_activated()
signal charon_killed()
signal azrael_hp_changed(current_hp: int, max_hp: int)
signal catacomb_cleared(drops: Array)
signal catacomb_failed(reason: String)

const NPC_CATACOMB_GUARD := 20367
const ITEM_SOUL_CRYSTAL_KEY := 30311 # 灵魂水晶钥匙 (进入与 1 层解锁)
const ITEM_GRIM_SOUL_STONE := 30312  # 冷酷之石 (5 层塔耳塔洛斯掉落)
const MIN_LEVEL := 75
const TIME_LIMIT := 3600.0           # 60 分钟限时

# 首领属性
const MOB_TARTAROS := 2597           # 5 层守卫 塔耳塔洛斯
const MOB_CHARON := 2596             # 6 层将军 卡隆
const MOB_AZRAEL := 2598             # 7 层冥界之王 阿兹瑞尔

const AZRAEL_MAX_HP := 900000
const AZRAEL_BASE_ATK := 2200
const AZRAEL_BASE_DEF := 680

var is_active: bool = false
var current_floor: int = 0
var remaining_time: float = 0.0

# 3 层复仇魔石状态
var correct_metin_id: int = 3
var metins_broken: int = 0

# 5 层方尖碑状态
var has_grim_stone: bool = false
var is_obelisk_unlocked: bool = false

# 7 层阿兹瑞尔状态
var azrael_hp: int = 0
var azrael_max_hp: int = AZRAEL_MAX_HP
var is_azrael_alive: bool = false
var azrael_minions_summoned: bool = false

# 进入地下墓穴 (通过 NPC 20367)
func enter_catacomb(player_level: int, inventory: Array) -> Dictionary:
	if player_level < MIN_LEVEL:
		return {
			"ok": false,
			"reason": "LEVEL_TOO_LOW",
			"msg": "你的等级不足 75 级，无法承受地下墓穴的死灵死气！"
		}

	# 检查 1 层必需的灵魂水晶钥匙 (30311)
	var key_slot := -1
	for i in range(inventory.size()):
		var item = inventory[i]
		if item != null and int(item.get("vnum", 0)) == ITEM_SOUL_CRYSTAL_KEY:
			key_slot = i
			break

	if key_slot == -1:
		return {
			"ok": false,
			"reason": "MISSING_SOUL_KEY",
			"msg": "进入地下墓穴需要持有【灵魂水晶钥匙】！"
		}

	# 初始化副本状态进入 1 层
	is_active = true
	current_floor = 1
	remaining_time = TIME_LIMIT
	correct_metin_id = randi_range(1, 5)
	metins_broken = 0
	has_grim_stone = false
	is_obelisk_unlocked = false
	is_azrael_alive = false

	floor_advanced.emit(1)

	return {
		"ok": true,
		"floor": 1,
		"time_limit": remaining_time,
		"msg": "成功踏入地下墓穴一层！限时 60 分钟！"
	}

# 第 1 层：使用灵魂水晶钥匙开启石门封印进入 2 层
func unlock_floor_1(inventory: Array) -> Dictionary:
	if not is_active or current_floor != 1:
		return {"ok": false, "reason": "WRONG_FLOOR"}

	var key_slot := -1
	for i in range(inventory.size()):
		var item = inventory[i]
		if item != null and int(item.get("vnum", 0)) == ITEM_SOUL_CRYSTAL_KEY:
			key_slot = i
			break

	if key_slot == -1:
		return {"ok": false, "reason": "MISSING_KEY", "msg": "背包中缺少灵魂水晶钥匙！"}

	# 消耗钥匙
	inventory[key_slot] = null
	current_floor = 2
	floor_advanced.emit(2)

	return {
		"ok": true,
		"floor": 2,
		"msg": "灵魂水晶钥匙已插入封印，石门轰然开启！进入地下墓穴二层！"
	}

# 第 2 层：突破恶灵迷宫进入 3 层
func complete_floor_2() -> Dictionary:
	if not is_active or current_floor != 2:
		return {"ok": false, "reason": "WRONG_FLOOR"}

	current_floor = 3
	floor_advanced.emit(3)
	return {
		"ok": true,
		"floor": 3,
		"msg": "已突破恶灵迷宫！进入地下墓穴三层！"
	}

# 第 3 层：击碎复仇魔石 (8035)
func break_floor_3_metin(metin_idx: int) -> Dictionary:
	if not is_active or current_floor != 3:
		return {"ok": false, "reason": "WRONG_FLOOR"}

	metins_broken += 1
	if metin_idx == correct_metin_id:
		current_floor = 4
		metin_destroyed.emit(true)
		floor_advanced.emit(4)
		return {
			"ok": true,
			"correct": true,
			"floor": 4,
			"msg": "击碎了真正的复仇魔石！封印瓦解，传送至地下墓穴四层！"
		}
	else:
		metin_destroyed.emit(false)
		return {
			"ok": true,
			"correct": false,
			"floor": 3,
			"msg": "这是虚假的伪装魔石！周围唤醒了冥界诅咒之魂！"
		}

# 第 4 层：玄武岩石柱迷宫寻路进入 5 层
func complete_floor_4() -> Dictionary:
	if not is_active or current_floor != 4:
		return {"ok": false, "reason": "WRONG_FLOOR"}

	current_floor = 5
	floor_advanced.emit(5)
	return {
		"ok": true,
		"floor": 5,
		"msg": "成功找到玄武岩迷宫真出口！进入地下墓穴五层！"
	}

# 第 5 层：击败塔耳塔洛斯 (2597) 并获得冷酷之石 (30312)
func defeat_tartaros(inventory: Array) -> Dictionary:
	if not is_active or current_floor != 5:
		return {"ok": false, "reason": "WRONG_FLOOR"}

	# 放入背包
	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，无法拾取冷酷之石！"}

	var grim_stone = {"vnum": ITEM_GRIM_SOUL_STONE, "name": "冷酷之石", "count": 1}
	inventory[empty_slot] = grim_stone
	has_grim_stone = true

	tartaros_killed.emit(grim_stone)

	return {
		"ok": true,
		"drop": grim_stone,
		"msg": "击败了守卫【塔耳塔洛斯】，获得了【冷酷之石】！请前往方尖碑镶嵌！"
	}

# 第 5 层：将冷酷之石插入玄武岩方尖碑，开启 6 层通道
func insert_grim_stone_to_obelisk(inventory: Array) -> Dictionary:
	if not is_active or current_floor != 5:
		return {"ok": false, "reason": "WRONG_FLOOR"}

	var stone_slot := -1
	for i in range(inventory.size()):
		var item = inventory[i]
		if item != null and int(item.get("vnum", 0)) == ITEM_GRIM_SOUL_STONE:
			stone_slot = i
			break

	if stone_slot == -1:
		return {"ok": false, "reason": "MISSING_STONE", "msg": "背包中缺少冷酷之石！"}

	inventory[stone_slot] = null
	is_obelisk_unlocked = true
	current_floor = 6
	obelisk_activated.emit()
	floor_advanced.emit(6)

	return {
		"ok": true,
		"floor": 6,
		"msg": "冷酷之石完美嵌入方尖碑！冥界封印开启，进入地下墓穴六层！"
	}

# 第 6 层：击败冥界将军卡隆 (2596) 进入 7 层阿兹瑞尔王座
func defeat_charon() -> Dictionary:
	if not is_active or current_floor != 6:
		return {"ok": false, "reason": "WRONG_FLOOR"}

	current_floor = 7
	# 初始化 7 层 Boss 阿兹瑞尔
	azrael_hp = AZRAEL_MAX_HP
	azrael_max_hp = AZRAEL_MAX_HP
	is_azrael_alive = true
	azrael_minions_summoned = false

	charon_killed.emit()
	floor_advanced.emit(7)

	return {
		"ok": true,
		"floor": 7,
		"boss_hp": azrael_hp,
		"msg": "冥界将军【卡隆】已被斩灭！传送至七层【冥王阿兹瑞尔王座】！"
	}

# 第 7 层：对冥王阿兹瑞尔造成伤害
func attack_azrael(raw_dmg: int) -> Dictionary:
	if not is_active or current_floor != 7 or not is_azrael_alive:
		return {"ok": false, "reason": "BOSS_NOT_AVAILABLE"}

	var net_dmg: int = max(1, raw_dmg - AZRAEL_BASE_DEF)
	azrael_hp = max(0, azrael_hp - net_dmg)

	azrael_hp_changed.emit(azrael_hp, azrael_max_hp)

	# 半血召唤死灵护卫
	var triggered_minions := false
	if azrael_hp <= int(AZRAEL_MAX_HP * 0.5) and not azrael_minions_summoned:
		azrael_minions_summoned = true
		triggered_minions = true

	# 击败阿兹瑞尔
	if azrael_hp <= 0:
		is_azrael_alive = false
		is_active = false
		var drops: Array = _generate_azrael_drops()
		catacomb_cleared.emit(drops)
		return {
			"ok": true,
			"killed": true,
			"net_dmg": net_dmg,
			"remaining_hp": 0,
			"drops": drops,
			"msg": "【冥王阿兹瑞尔】轰然倒下！地下墓穴已被彻底征服！"
		}

	return {
		"ok": true,
		"killed": false,
		"net_dmg": net_dmg,
		"remaining_hp": azrael_hp,
		"summoned_minions": triggered_minions
	}

# 逐帧倒计时
func update(dt: float) -> void:
	if not is_active:
		return

	remaining_time -= dt
	if remaining_time <= 0.0:
		is_active = false
		is_azrael_alive = false
		catacomb_failed.emit("TIME_OUT")

# 生成阿兹瑞尔掉落物
func _generate_azrael_drops() -> Array:
	var drops: Array = []

	# 1. 必掉阿兹瑞尔专属宝箱 (50187)
	drops.append({
		"vnum": 50187,
		"name": "阿兹瑞尔宝箱",
		"count": 1
	})

	# 2. 必掉灵魂之石 (50513)
	drops.append({
		"vnum": 50513,
		"name": "灵魂之石",
		"count": 1
	})

	# 3. 终极泰坦之盾 (13149) 概率掉落
	drops.append({
		"vnum": 13149,
		"name": "泰坦之盾+0",
		"count": 1
	})

	# 4. 大额冥界金币
	drops.append({
		"vnum": 1,
		"name": "金币",
		"count": randi_range(200000, 400000)
	})

	return drops