# demon_tower_system.gd —— 恶魔之塔 1~9 层单机爬塔挑战循环与塔顶免费铁匠（40250 官方 1:1 对齐）
# 对齐源码：
#   - 40250 server/share/locale/english/quest/deviltower_zone.quest
#   - 40250 server/game/src/dungeon.cpp
#   - 40250 server/game/src/char_battle.cpp
class_name DemonTowerSystem
extends RefCounted

signal floor_changed(floor_num: int, floor_name: String)
signal floor_completed(floor_num: int)
signal tower_completed
signal tower_failed(reason: String)
signal blacksmith_spawned(blacksmith_vnum: int, blacksmith_name: String)

# 核心怪物与 NPC Vnum (40250 官方标准)
const VNUM_METIN_FLOOR1 := 8015        # 坚韧之石 (1层入口封印)
const VNUM_DEMON_KING := 1091          # 恶魔王 (3层 BOSS)
const VNUM_METIN_FLOOR4 := 8016        # 恶魔封印石 (4层真伪封印石)
const VNUM_ELITE_DEMON_KING := 1092    # 精英恶魔王 (6层 BOSS)
const VNUM_METIN_DEATH := 8017         # 死亡之石 (7层)
const VNUM_DEATH_REAPER := 1093        # 死神 (9层 最终 BOSS)

# 塔顶免费铁匠 NPC
const NPC_TOWER_WEAPON_SMITH := 20074  # 恶魔之塔武器铁匠
const NPC_TOWER_ARMOR_SMITH := 20075   # 恶魔之塔防具铁匠
const NPC_TOWER_JEWELRY_SMITH := 20076 # 恶魔之塔首饰铁匠

# 核心任务道具
const VNUM_ZIN_KEY_FLOOR5 := 50084     # 解除 5 层石碑钥匙
const VNUM_ZIN_MAP_FLOOR7 := 30302     # 7 层恶魔封印地图
const VNUM_ZIN_KEY_FLOOR8 := 30304     # 8 层通往塔顶钥匙
const VNUM_DEATH_REAPER_CHEST := 50082 # 9 层死神宝箱

const TOTAL_FLOORS := 9
const FLOOR_NAMES := {
	1: "第 1 层：恶魔入口",
	2: "第 2 层：恶魔集结所",
	3: "第 3 层：恶魔王大殿",
	4: "第 4 层：迷幻封印之阵",
	5: "第 5 层：五柱封印禁地",
	6: "第 6 层：恶魔之塔顶峰",
	7: "第 7 层：死神迷宫前厅",
	8: "第 8 层：死神结界禁地",
	9: "第 9 层：死神王座决战",
}

# 运行期状态
var current_floor := 1
var is_active := false
var floor_time_left := 1200.0 # 20 分钟单层时限
var floor4_real_metin_idx := -1
var floor5_unlocked_pillars := 0
var floor6_blacksmith_vnum := 0
var floor6_free_refine_used := false

func start_tower() -> void:
	current_floor = 1
	is_active = true
	floor_time_left = 1200.0
	floor4_real_metin_idx = -1
	floor5_unlocked_pillars = 0
	floor6_blacksmith_vnum = 0
	floor6_free_refine_used = false
	floor_changed.emit(1, FLOOR_NAMES[1])

func get_floor() -> int:
	return current_floor

func get_floor_name() -> String:
	return FLOOR_NAMES.get(current_floor, "未知层")

## 第 1 层判定：击碎封印石 8015 即可通关
func on_floor1_metin_destroyed(vnum: int) -> bool:
	if current_floor != 1 or not is_active:
		return false
	if vnum == VNUM_METIN_FLOOR1:
		_advance_floor()
		return true
	return false

## 第 2 层判定：清理全图怪物
func on_floor2_mobs_cleared(mob_count: int) -> bool:
	if current_floor != 2 or not is_active:
		return false
	if mob_count <= 0:
		_advance_floor()
		return true
	return false

## 第 3 层判定：击杀恶魔王 1091
func on_floor3_boss_killed(boss_vnum: int) -> bool:
	if current_floor != 3 or not is_active:
		return false
	if boss_vnum == VNUM_DEMON_KING:
		_advance_floor()
		return true
	return false

## 第 4 层判定：初始化 7 座封印石并在打破真石时通关
func setup_floor4_metins() -> void:
	# 7 座封印石 (索引 0..6)，随机指定 1 座为真石
	floor4_real_metin_idx = randi() % 7

func on_floor4_metin_hit(stone_idx: int) -> Dictionary:
	if current_floor != 4 or not is_active:
		return {"ok": false, "msg": "当前不在第 4 层！"}
	if stone_idx == floor4_real_metin_idx:
		_advance_floor()
		return {"ok": true, "is_real": true, "msg": "找到了真实的恶魔封印石！通往第 5 层的传送门开启！"}
	else:
		return {"ok": true, "is_real": false, "msg": "这是一座虚假的封印石，迷雾尚未散开！"}

## 第 5 层判定：使用钥匙解除 5 座恶魔石柱
func on_floor5_unlock_pillar(key_vnum: int) -> Dictionary:
	if current_floor != 5 or not is_active:
		return {"ok": false, "msg": "当前不在第 5 层！"}
	if key_vnum != VNUM_ZIN_KEY_FLOOR5:
		return {"ok": false, "msg": "钥匙不匹配！"}
	
	floor5_unlocked_pillars += 1
	var remain := 5 - floor5_unlocked_pillars
	if floor5_unlocked_pillars >= 5:
		_advance_floor()
		return {"ok": true, "completed": true, "msg": "5 座恶魔石碑全部解除封印！传送至第 6 层！"}
	else:
		return {"ok": true, "completed": false, "remain": remain, "msg": "成功解除了一座石碑封印，还剩 %d 座！" % remain}

## 第 6 层判定：击杀精英恶魔王 1092 并召唤免费铁匠
func on_floor6_boss_killed(boss_vnum: int) -> Dictionary:
	if current_floor != 6 or not is_active:
		return {"ok": false, "msg": "当前不在第 6 层！"}
	if boss_vnum == VNUM_ELITE_DEMON_KING:
		# 随机召唤三位塔顶铁匠之一
		var smiths := [
			{"vnum": NPC_TOWER_WEAPON_SMITH, "name": "恶魔之塔武器铁匠"},
			{"vnum": NPC_TOWER_ARMOR_SMITH, "name": "恶魔之塔防具铁匠"},
			{"vnum": NPC_TOWER_JEWELRY_SMITH, "name": "恶魔之塔首饰铁匠"}
		]
		var chosen: Dictionary = smiths[randi() % smiths.size()]
		floor6_blacksmith_vnum = chosen["vnum"]
		floor6_free_refine_used = false
		blacksmith_spawned.emit(chosen["vnum"], chosen["name"])
		return {
			"ok": true,
			"blacksmith_vnum": chosen["vnum"],
			"blacksmith_name": chosen["name"],
			"msg": "击杀了精英恶魔王！塔顶现身了一位【%s】！" % chosen["name"]
		}
	return {"ok": false, "msg": "目标不是精英恶魔王！"}

## 第 6 层塔顶免费铁匠强化 (无需材料，单人爬塔经典福利)
func perform_tower_free_refine(item: Dictionary, item_type: int) -> Dictionary:
	if current_floor != 6 or floor6_blacksmith_vnum == 0:
		return {"ok": false, "code": "NO_BLACKSMITH", "msg": "塔顶铁匠尚未出现！"}
	if floor6_free_refine_used:
		return {"ok": false, "code": "ALREADY_USED", "msg": "恶魔之塔铁匠本次只能免费强化一次！"}
	
	# 校验铁匠类型与物品类型匹配
	if floor6_blacksmith_vnum == NPC_TOWER_WEAPON_SMITH and item_type != 1:
		return {"ok": false, "code": "TYPE_MISMATCH", "msg": "武器铁匠只能强化武器！"}
	if floor6_blacksmith_vnum == NPC_TOWER_ARMOR_SMITH and item_type != 2:
		return {"ok": false, "code": "TYPE_MISMATCH", "msg": "防具铁匠只能强化防具！"}
	
	floor6_free_refine_used = true
	var cur_vnum := int(item.get("vnum", 0))
	var new_vnum := cur_vnum + 1
	item["vnum"] = new_vnum
	return {
		"ok": true,
		"code": "SUCCESS",
		"old_vnum": cur_vnum,
		"new_vnum": new_vnum,
		"msg": "【%s】为你施展了恶魔神工，免费强化成功！装备晋升为 #%d！" % [
			"武器铁匠" if floor6_blacksmith_vnum == NPC_TOWER_WEAPON_SMITH else "防具铁匠",
			new_vnum
		]
	}

## 从第 6 层前往第 7 层 (要求角色等级 >= 75)
func advance_to_floor7(player_level: int) -> Dictionary:
	if current_floor != 6:
		return {"ok": false, "msg": "不在第 6 层！"}
	if player_level < 75:
		return {"ok": false, "code": "LEVEL_TOO_LOW", "msg": "只有等级达到 75 级的真正勇者，才能踏入恶魔之塔第 7 层禁地！"}
	_advance_floor()
	return {"ok": true, "msg": "踏入了死神禁地第 7 层！"}

## 第 7 层判定：使用恶魔地图 30302 通关
func on_floor7_map_used(map_vnum: int) -> bool:
	if current_floor != 7 or not is_active:
		return false
	if map_vnum == VNUM_ZIN_MAP_FLOOR7:
		_advance_floor()
		return true
	return false

## 第 8 层判定：使用钥匙 30304 通关
func on_floor8_key_used(key_vnum: int) -> bool:
	if current_floor != 8 or not is_active:
		return false
	if key_vnum == VNUM_ZIN_KEY_FLOOR8:
		_advance_floor()
		return true
	return false

## 第 9 层终极对决：击杀死神 1093
func on_floor9_boss_killed(boss_vnum: int) -> Dictionary:
	if current_floor != 9 or not is_active:
		return {"ok": false, "msg": "当前不在第 9 层！"}
	if boss_vnum == VNUM_DEATH_REAPER:
		is_active = false
		tower_completed.emit()
		return {
			"ok": true,
			"code": "TOWER_CLEAR",
			"drop_vnum": VNUM_DEATH_REAPER_CHEST,
			"msg": "壮举！你成功斩杀了死神，恶魔之塔被彻底征服！获得了【死神宝箱】！"
		}
	return {"ok": false, "msg": "目标不是死神！"}

func _advance_floor() -> void:
	floor_completed.emit(current_floor)
	current_floor += 1
	floor_time_left = 1200.0
	floor_changed.emit(current_floor, FLOOR_NAMES.get(current_floor, "第 %d 层" % current_floor))