# auto_combat_bot_system.gd —— Metin2 40250 自动战斗猎杀挂机助手 1:1
# 对照 40250 服务端 char_battle.cpp, bot.cpp, item_manager.cpp
class_name AutoCombatBotSystem
extends RefCounted

signal bot_toggled(enabled: bool)
signal potion_used(potion_vnum: int, ptype: String)
signal target_locked(target_id: String)
signal auto_attack_fired(target_id: String, damage: int)
signal auto_skill_fired(skill_vnum: int, target_id: String)
signal auto_loot_collected(item_name: String, slot: int)

# 红药与蓝药 VNUM
const HP_POTION_VNUMS: Array = [27001, 27002, 27003] # 小/中/大红
const SP_POTION_VNUMS: Array = [27004, 27005, 27006] # 小/中/大蓝

var is_enabled: bool = false
var auto_potion_enabled: bool = true
var hp_threshold: float = 0.50 # 50% HP 触发喝红
var sp_threshold: float = 0.40 # 40% SP 触发喝蓝

var auto_attack_enabled: bool = true
var scan_radius: float = 15.0
var attack_range: float = 3.0

var auto_skill_enabled: bool = true
var assigned_skills: Array = []
var skill_cooldowns: Dictionary = {}

var auto_loot_enabled: bool = true
var loot_radius: float = 8.0

var current_target_id: String = ""
var potion_cooldown: float = 0.0

# 开启/关闭挂机内挂
func toggle_bot(enable: bool) -> Dictionary:
	is_enabled = enable
	if not is_enabled:
		current_target_id = ""
	bot_toggled.emit(is_enabled)
	return {"ok": true, "enabled": is_enabled, "msg": "自动战斗猎杀助手已%s！" % ("开启" if is_enabled else "关闭")}

# 帧心跳驱动挂机逻辑
func update_bot(delta: float, player_data: Dictionary, inventory: Array, nearby_mobs: Array, nearby_drops: Array) -> Dictionary:
	if not is_enabled:
		return {"status": "disabled"}

	if potion_cooldown > 0.0:
		potion_cooldown = max(0.0, potion_cooldown - delta)

	for sk in skill_cooldowns.keys():
		if skill_cooldowns[sk] > 0.0:
			skill_cooldowns[sk] = max(0.0, skill_cooldowns[sk] - delta)

	var p_pos: Vector3 = player_data.get("pos", Vector3.ZERO)
	var p_hp: int = int(player_data.get("hp", 100))
	var p_max_hp: int = max(1, int(player_data.get("max_hp", 100)))
	var p_sp: int = int(player_data.get("sp", 100))
	var p_max_sp: int = max(1, int(player_data.get("max_sp", 100)))

	# 1. 自动智能喝药判定
	if auto_potion_enabled and potion_cooldown <= 0.0:
		if float(p_hp) / float(p_max_hp) <= hp_threshold:
			if _use_potion(HP_POTION_VNUMS, inventory, player_data, "hp"):
				potion_cooldown = 1.0 # 喝药公共冷却 1 秒

		if float(p_sp) / float(p_max_sp) <= sp_threshold:
			if _use_potion(SP_POTION_VNUMS, inventory, player_data, "sp"):
				potion_cooldown = 1.0

	# 2. 自动拾取掉落物
	if auto_loot_enabled:
		_process_auto_loot(p_pos, nearby_drops, inventory)

	# 3. 自动搜敌与战斗打击
	if auto_attack_enabled:
		var act = _process_auto_combat(delta, p_pos, player_data, nearby_mobs)
		return act

	return {"status": "idle"}

# 自动喝药
func _use_potion(potion_vnums: Array, inventory: Array, player_data: Dictionary, ptype: String) -> bool:
	for i in range(inventory.size()):
		if inventory[i] != null and int(inventory[i].get("vnum", 0)) in potion_vnums:
			var pot = inventory[i]
			var pvnum = int(pot["vnum"])
			var cnt = int(pot.get("count", 1))
			if cnt > 1:
				pot["count"] = cnt - 1
			else:
				inventory[i] = null

			var rec = 1500 if pvnum in [27003, 27006] else 800
			if ptype == "hp":
				player_data["hp"] = min(int(player_data["max_hp"]), int(player_data["hp"]) + rec)
			else:
				player_data["sp"] = min(int(player_data["max_sp"]), int(player_data["sp"]) + rec)

			potion_used.emit(pvnum, ptype)
			return true
	return false

# 自动拾取
func _process_auto_loot(player_pos: Vector3, drops: Array, inventory: Array) -> void:
	for d in drops:
		if d.get("looted", false):
			continue
		var d_pos: Vector3 = d.get("pos", Vector3.ZERO)
		if player_pos.distance_to(d_pos) <= loot_radius:
			# 放入背包
			for i in range(inventory.size()):
				if inventory[i] == null:
					inventory[i] = {
						"vnum": d.get("vnum", 1),
						"name": d.get("name", "战利品"),
						"count": int(d.get("count", 1))
					}
					d["looted"] = true
					auto_loot_collected.emit(d["name"], i)
					break

# 自动锁敌与攻击
func _process_auto_combat(delta: float, player_pos: Vector3, player_data: Dictionary, mobs: Array) -> Dictionary:
	var closest_mob = null
	var min_dist = scan_radius + 1.0

	for m in mobs:
		if not m.get("alive", true):
			continue
		var m_pos: Vector3 = m.get("pos", Vector3.ZERO)
		var dist = player_pos.distance_to(m_pos)
		if dist <= scan_radius and dist < min_dist:
			min_dist = dist
			closest_mob = m

	if closest_mob == null:
		current_target_id = ""
		return {"status": "no_targets"}

	var target_id = str(closest_mob.get("id", "mob"))
	if current_target_id != target_id:
		current_target_id = target_id
		target_locked.emit(target_id)

	var target_pos: Vector3 = closest_mob.get("pos", Vector3.ZERO)
	var dist_to_target = player_pos.distance_to(target_pos)

	# 走位靠拢
	if dist_to_target > attack_range:
		var new_pos = player_pos.move_toward(target_pos, 5.0 * delta)
		player_data["pos"] = new_pos
		return {"status": "moving_to_target", "target": target_id, "dist": dist_to_target}

	# 尝试释放技能
	if auto_skill_enabled:
		for sk in assigned_skills:
			if skill_cooldowns.get(sk, 0.0) <= 0.0:
				skill_cooldowns[sk] = 8.0 # 默认技能 8 秒冷却
				auto_skill_fired.emit(sk, target_id)
				var sk_dmg = int(float(player_data.get("atk", 500)) * 2.0)
				closest_mob["hp"] = max(0, int(closest_mob.get("hp", 1000)) - sk_dmg)
				if closest_mob["hp"] <= 0:
					closest_mob["alive"] = false
				return {"status": "skill_attack", "skill": sk, "damage": sk_dmg}

	# 普通挥砍攻击
	var atk_dmg = int(player_data.get("atk", 500))
	closest_mob["hp"] = max(0, int(closest_mob.get("hp", 1000)) - atk_dmg)
	if closest_mob["hp"] <= 0:
		closest_mob["alive"] = false

	auto_attack_fired.emit(target_id, atk_dmg)
	return {"status": "basic_attack", "target": target_id, "damage": atk_dmg}