# title_achievement_system.gd —— Metin2 40250 殿堂级头衔与成就系统 1:1
# 对照 40250 服务端 char.cpp, questmanager.cpp, locale_string.txt
class_name TitleAchievementSystem
extends RefCounted

signal achievement_unlocked(ach_id: String, ach_name: String, title: String)
signal title_equipped(title_name: String, bonuses: Dictionary)
signal title_unequipped()

const ACHIEVEMENTS: Dictionary = {
	"ACH_DEMON_TOWER": {
		"name": "恶魔之塔登顶",
		"desc": "突破恶魔之塔 9 层并斩杀死神",
		"title": "恶魔征服者",
		"points": 50,
		"bonuses": {"max_hp": 500}
	},
	"ACH_SPIDER_BARONESS": {
		"name": "蛛皇陨落",
		"desc": "在蜘蛛洞穴三层巢穴击败蜘蛛男爵夫人",
		"title": "蛛巢克星",
		"points": 50,
		"bonuses": {"monster_dmg_pct": 5}
	},
	"ACH_BERAN_SETAOU": {
		"name": "冰龙之诛",
		"desc": "击破四大魔石并消灭冰龙贝兰-塞陶",
		"title": "屠龙勇士",
		"points": 100,
		"bonuses": {"boss_dmg_pct": 10}
	},
	"ACH_AZRAEL": {
		"name": "冥王末日",
		"desc": "穿过地下墓穴七层击破冥王阿兹瑞尔",
		"title": "深渊征服者",
		"points": 100,
		"bonuses": {"def": 50}
	},
	"ACH_FOUR_WORLD_BOSSES": {
		"name": "四方平定",
		"desc": "击杀野外九尾妖狐、沙漠龟、黄虎之魂与烈焰领主",
		"title": "大陆守护者",
		"points": 150,
		"bonuses": {"critical_pct": 5}
	},
	"ACH_SKILL_GRANDMASTER": {
		"name": "大巧不工",
		"desc": "将任意核心战斗技能修炼至 P 级完美境界",
		"title": "武学宗师",
		"points": 80,
		"bonuses": {"cast_speed": 10}
	},
	"ACH_EPIC_BLACKSMITH": {
		"name": "神兵天成",
		"desc": "成功完成修元平史诗武器或蓝钢神甲升阶转换",
		"title": "神工锻造师",
		"points": 80,
		"bonuses": {"att": 50}
	}
}

var unlocked_achievements: Dictionary = {} # ach_id -> bool
var unlocked_titles: Array = []            # list of title strings
var total_achievement_points: int = 0
var active_title: String = ""

# 追踪并达成成就
func complete_achievement(ach_id: String) -> Dictionary:
	if not ACHIEVEMENTS.has(ach_id):
		return {"ok": false, "reason": "INVALID_ACH_ID", "msg": "未知的成就标识！"}

	if unlocked_achievements.get(ach_id, false):
		return {"ok": false, "reason": "ALREADY_COMPLETED", "msg": "该成就已达成！"}

	var cfg: Dictionary = ACHIEVEMENTS[ach_id]
	unlocked_achievements[ach_id] = true
	total_achievement_points += int(cfg["points"])

	var title_name: String = cfg["title"]
	if not unlocked_titles.has(title_name):
		unlocked_titles.append(title_name)

	achievement_unlocked.emit(ach_id, cfg["name"], title_name)

	return {
		"ok": true,
		"ach_id": ach_id,
		"name": cfg["name"],
		"title": title_name,
		"points_awarded": cfg["points"],
		"total_points": total_achievement_points,
		"msg": "达成里程碑成就【%s】！解锁荣耀称号【%s】！" % [cfg["name"], title_name]
	}

# 佩戴称号
func equip_title(title_name: String) -> Dictionary:
	if not unlocked_titles.has(title_name):
		return {"ok": false, "reason": "TITLE_NOT_UNLOCKED", "msg": "你尚未解锁该头衔称号！"}

	active_title = title_name
	var bonuses := get_active_bonuses()

	title_equipped.emit(title_name, bonuses)

	return {
		"ok": true,
		"active_title": active_title,
		"bonuses": bonuses,
		"msg": "已成功佩戴头衔【%s】！战力属性已生效！" % title_name
	}

# 卸下称号
func unequip_title() -> void:
	active_title = ""
	title_unequipped.emit()

# 获取当前佩戴称号的属性加成
func get_active_bonuses() -> Dictionary:
	if active_title.is_empty():
		return {}

	for cfg in ACHIEVEMENTS.values():
		if cfg["title"] == active_title:
			return cfg["bonuses"].duplicate()

	return {}

# 查询成就状态
func is_achievement_unlocked(ach_id: String) -> bool:
	return unlocked_achievements.get(ach_id, false)