# soul_stone_grandmaster_system.gd —— Metin2 40250 官方宗师绝技灵魂石悟道与善恶值走火入魔系统 1:1
# 100% 对照 40250 服务端 training_grandmaster_skill.quest, char_skill.cpp, questlua_pc.cpp
class_name SoulStoneGrandmasterSystem
extends RefCounted

signal grandmaster_trained(skill_id: int, skill_name: String, new_level: int, alignment_deducted: int)
signal grandmaster_failed(skill_id: int, skill_name: String, alignment_penalty: int)
signal cooldown_cleared()
signal training_error(reason: String)

# 40250 官方核心道具 Vnum
const VNUM_SOUL_STONE       := 50513 # 灵魂石 (Ruh Taşı / Soul Stone)
const VNUM_EXORCISM_SCROLL := 71001 # 驱魔卷轴 (清除修炼间隔)

# 技能等级境界常数
const GRAND_MASTER_MIN_LEVEL := 30 # G1 (30级)
const PERFECT_MASTER_LEVEL   := 40 # P 阶绝顶境界 (40级)

# 最低极限负善恶值 (-20000 封底)
const MIN_ALIGNMENT_CAP := -20000

# 修炼冷却时间
var training_cooldown_left: float = 0.0 # 8~12 小时倒计时

# 判断技能是否处于宗师境界 (G1 ~ G10)
func can_train_skill(skill_level: int) -> bool:
	return skill_level >= GRAND_MASTER_MIN_LEVEL and skill_level < PERFECT_MASTER_LEVEL

# 计算升级所需善恶值 (40250 官方公式: 1000 + 500 * (level - 30)，负道德翻倍)
func get_required_alignment(skill_level: int, current_alignment: int) -> int:
	if not can_train_skill(skill_level):
		return 0
	var base_cost = 1000 + 500 * (skill_level - GRAND_MASTER_MIN_LEVEL)
	if current_alignment < 0:
		return base_cost * 2
	return base_cost

# 获取技能境界文本 (如 "G1", "G5", "P")
func get_skill_tier_text(level: int) -> String:
	if level < GRAND_MASTER_MIN_LEVEL:
		return "Normal/Master"
	elif level >= PERFECT_MASTER_LEVEL:
		return "P 阶 (Perfect Master)"
	else:
		return "G%d" % (level - GRAND_MASTER_MIN_LEVEL + 1)

# 使用灵魂石闭关冲击宗师绝技
func train_grandmaster_skill(
	inventory: Array,
	soul_stone_slot: int,
	skill_id: int,
	skill_name: String,
	current_skill_level: int,
	current_alignment: int,
	has_exorcism_scroll: bool = false,
	forced_success: bool = false,
	forced_roll: int = -1
) -> Dictionary:
	# 检查技能是否在 G 阶
	if not can_train_skill(current_skill_level):
		training_error.emit("INVALID_SKILL_LEVEL")
		return {
			"ok": false,
			"reason": "INVALID_SKILL_LEVEL",
			"msg": "只有达到宗师境界 (G1~G10) 的技能方可使用灵魂石闭关突破！"
		}
	
	# 检查冷却
	if training_cooldown_left > 0.0 and not has_exorcism_scroll:
		training_error.emit("COOLDOWN_ACTIVE")
		return {
			"ok": false,
			"reason": "COOLDOWN_ACTIVE",
			"msg": "心神尚未平复！需等待 %d 秒方可再次闭关，或使用【驱魔卷轴】重置心境。" % int(training_cooldown_left)
		}
	
	# 检查灵魂石
	if soul_stone_slot < 0 or soul_stone_slot >= inventory.size() or inventory[soul_stone_slot] == null:
		training_error.emit("NO_SOUL_STONE")
		return {"ok": false, "reason": "NO_SOUL_STONE", "msg": "未找到灵魂石！"}
	
	var item = inventory[soul_stone_slot]
	var vnum = int(item.get("vnum", 0))
	if vnum != VNUM_SOUL_STONE:
		training_error.emit("NOT_A_SOUL_STONE")
		return {"ok": false, "reason": "NOT_A_SOUL_STONE", "msg": "该物品并不是灵魂石！"}
	
	# 计算所需善恶值
	var need_align = get_required_alignment(current_skill_level, current_alignment)
	
	# 检查是否跌破道德底线 (40250: cur_alignment < -19000 + need_alignment)
	if current_alignment < (MIN_ALIGNMENT_CAP + 1000 + need_align):
		training_error.emit("ALIGNMENT_TOO_LOW")
		return {
			"ok": false,
			"reason": "ALIGNMENT_TOO_LOW",
			"msg": "你的罪孽太过深重，心灵已被心魔完全吞噬！必须行善恢复善恶值后方能参悟。"
		}
	
	# 消耗灵魂石 (40250 pc.remove_item(50513))
	_consume_item_one(inventory, soul_stone_slot)
	
	# 设置下次领悟冷却时间 8~12 小时 (28800 ~ 43200 秒)
	training_cooldown_left = randf_range(28800.0, 43200.0)
	
	# 判定成功概率 (40250 官方约为 30% ~ 35%)
	var r = forced_roll if forced_roll > 0 else randi_range(1, 100)
	var is_success = (r <= 30) or forced_success
	
	if is_success:
		# 悟道成功
		var new_lvl = current_skill_level + 1
		var new_alignment = current_alignment - need_align
		grandmaster_trained.emit(skill_id, skill_name, new_lvl, need_align)
		
		var tier_str = get_skill_tier_text(new_lvl)
		var reach_p = (new_lvl >= PERFECT_MASTER_LEVEL)
		var msg = ""
		if reach_p:
			msg = "金光贯顶，大道终成！你的【%s】突破桎梏，登峰造极达成了【%s】绝顶境界！" % [skill_name, tier_str]
		else:
			msg = "神识升华，灵智通达！你的【%s】成功精进为【%s】！消耗善恶值 %d 点。" % [skill_name, tier_str, need_align]
		
		return {
			"ok": true,
			"success": true,
			"new_level": new_lvl,
			"tier_text": tier_str,
			"is_perfect_master": reach_p,
			"alignment_cost": need_align,
			"new_alignment": new_alignment,
			"msg": msg
		}
	else:
		# 走火入魔失败：扣除 1/3 ~ 1/2 的善恶值惩罚
		var penalty_ratio = randf_range(0.33, 0.50)
		var penalty = max(1, int(floor(need_align * penalty_ratio)))
		var new_alignment = current_alignment - penalty
		grandmaster_failed.emit(skill_id, skill_name, penalty)
		
		return {
			"ok": true,
			"success": false,
			"new_level": current_skill_level,
			"tier_text": get_skill_tier_text(current_skill_level),
			"is_perfect_master": false,
			"alignment_cost": penalty,
			"new_alignment": new_alignment,
			"msg": "走火入魔！灵魂石在狂暴的灵气中化为碎粉，未能参悟真谛。惩罚扣除 %d 点善恶值！" % penalty
		}

# 使用驱魔卷轴清除冷却
func use_exorcism_scroll() -> void:
	training_cooldown_left = 0.0
	cooldown_cleared.emit()

func update(delta: float) -> void:
	if training_cooldown_left > 0.0:
		training_cooldown_left = max(0.0, training_cooldown_left - delta)

func _consume_item_one(inventory: Array, slot: int) -> void:
	if slot < 0 or slot >= inventory.size() or inventory[slot] == null:
		return
	var item = inventory[slot]
	var count = int(item.get("count", 1))
	if count > 1:
		item["count"] = count - 1
	else:
		inventory[slot] = null

# 序列化与反序列化
func serialize() -> Dictionary:
	return {
		"cooldown_left": training_cooldown_left
	}

func deserialize(data: Dictionary) -> void:
	training_cooldown_left = float(data.get("cooldown_left", 0.0))