# cursed_monolith_spire_system.gd —— Metin2 40250 野外魔石破除之【封印魔塔】限时防守挑战 1:1
# 对照 40250 服务端 regen.cpp, dungeon.cpp, char_battle.cpp, item_manager.cpp
class_name CursedMonolithSpireSystem
extends RefCounted

signal spire_emerged(pos: Vector3, time_limit: float)
signal wave_spawned(wave_index: int, wave_name: String, mob_count: int)
signal trial_completed(success: bool, time_used: float)
signal reward_chest_spawned(chest_vnum: int, pos: Vector3)

const TRIAL_TIME_LIMIT: float = 180.0 # 3 分钟倒计时
const CHEST_VNUM: int = 50130         # 上古魔塔宝箱 (Ancient Spire Chest)

const WAVE_CONFIG: Dictionary = {
	1: {
		"name": "第 1 波：狂暴魔兵突袭",
		"mob_vnum": 701, # 恶魔士兵
		"count": 6
	},
	2: {
		"name": "第 2 波：双生魔将合围",
		"mob_vnum": 1092, # 恶魔大将
		"count": 2
	},
	3: {
		"name": "第 3 波：上古守墓魔王",
		"mob_vnum": 1093, # 恶魔死神幻影
		"count": 1
	}
}

var is_active: bool = false
var current_wave: int = 0
var time_remaining: float = 0.0
var spire_pos: Vector3 = Vector3.ZERO
var difficulty: int = 50

var active_mobs: Dictionary = {} # mob_id -> { "vnum", "alive" }
var next_mob_id: int = 1
var is_victory: bool = false
var chest_available: bool = false

# 启动封印魔塔挑战
func start_trial(pos: Vector3, diff_level: int = 50) -> Dictionary:
	if is_active:
		return {"ok": false, "reason": "TRIAL_ALREADY_ACTIVE", "msg": "封印魔塔挑战正在进行中！"}

	is_active = true
	is_victory = false
	chest_available = false
	spire_pos = pos
	difficulty = diff_level
	time_remaining = TRIAL_TIME_LIMIT
	current_wave = 0
	active_mobs.clear()
	next_mob_id = 1

	spire_emerged.emit(pos, TRIAL_TIME_LIMIT)

	# 立即召唤第 1 波
	_spawn_wave(1)

	return {
		"ok": true,
		"pos": pos,
		"time_limit": TRIAL_TIME_LIMIT,
		"msg": "大地剧烈震颤！【诅咒的封印黑石魔塔】破土升起！请在 180 秒内清除所有魔潮！"
	}

# 产生指定阶段怪潮
func _spawn_wave(wave_idx: int) -> void:
	current_wave = wave_idx
	var cfg = WAVE_CONFIG[wave_idx]
	var count: int = cfg["count"]
	var vnum: int = cfg["mob_vnum"]

	active_mobs.clear()
	for i in range(count):
		var mid := next_mob_id
		next_mob_id += 1
		active_mobs[mid] = {
			"id": mid,
			"vnum": vnum,
			"alive": true
		}

	wave_spawned.emit(wave_idx, cfg["name"], count)

# 击杀魔潮怪物
func kill_mob(mob_id: int) -> Dictionary:
	if not is_active:
		return {"ok": false, "reason": "TRIAL_NOT_ACTIVE"}

	if not active_mobs.has(mob_id) or not active_mobs[mob_id]["alive"]:
		return {"ok": false, "reason": "MOB_NOT_FOUND"}

	active_mobs[mob_id]["alive"] = false
	active_mobs.erase(mob_id)

	# 检查当前波次是否全清
	if active_mobs.is_empty():
		if current_wave < 3:
			# 进入下一波
			var next_w = current_wave + 1
			_spawn_wave(next_w)
			return {
				"ok": true,
				"wave_cleared": current_wave - 1,
				"next_wave": next_w,
				"msg": "当前波次肃清！更加凶险的魔物正在凝聚！"
			}
		else:
			# 第 3 波首领击破 -> 大获全胜！
			return _finish_trial(true)

	return {
		"ok": true,
		"remaining_in_wave": active_mobs.size()
	}

# 帧心跳更新限时倒计时
func update(delta: float) -> Dictionary:
	if not is_active:
		return {"status": "inactive"}

	time_remaining -= delta
	if time_remaining <= 0.0:
		time_remaining = 0.0
		return _finish_trial(false)

	return {
		"status": "running",
		"wave": current_wave,
		"remaining_mobs": active_mobs.size(),
		"time_remaining": time_remaining
	}

# 结算挑战胜负
func _finish_trial(success: bool) -> Dictionary:
	is_active = false
	is_victory = success
	var time_used = TRIAL_TIME_LIMIT - time_remaining

	if success:
		chest_available = true
		reward_chest_spawned.emit(CHEST_VNUM, spire_pos)
		trial_completed.emit(true, time_used)
		return {
			"ok": true,
			"victory": true,
			"time_used": time_used,
			"msg": "【封印魔塔】封印彻底瓦解！降下【上古魔塔宝箱】！耗时: %.1f 秒" % time_used
		}
	else:
		active_mobs.clear()
		trial_completed.emit(false, TRIAL_TIME_LIMIT)
		return {
			"ok": true,
			"victory": false,
			"time_used": TRIAL_TIME_LIMIT,
			"msg": "时间耗尽！封印黑石魔塔重新沉入深渊地底，挑战失败！"
		}

# 开启上古宝箱获取掉落
func open_reward_chest() -> Array:
	if not chest_available:
		return []

	chest_available = false
	var drops: Array = [
		{"vnum": 71003, "name": "祝福卷轴", "count": 2},
		{"vnum": 50513, "name": "灵魂之石", "count": 1},
		{"vnum": 70024, "name": "祝福宝珠", "count": 1},
		{"vnum": 1, "name": "金币", "count": 3500000}
	]
	return drops

# 取消/中断挑战
func cancel_trial() -> Dictionary:
	if not is_active:
		return {"ok": false, "reason": "NOT_ACTIVE"}

	is_active = false
	active_mobs.clear()
	return {"ok": true, "msg": "挑战已提前终止。"}

# 获取状态
func get_trial_state() -> Dictionary:
	return {
		"is_active": is_active,
		"is_victory": is_victory,
		"current_wave": current_wave,
		"remaining_mobs": active_mobs.size(),
		"time_remaining": time_remaining,
		"chest_available": chest_available
	}