# gm_toolkit_system.gd —— Metin2 40250 单人单机内置 GM 控制台与命令解析器 1:1
# 对照 40250 服务端 cmd_gm.cpp, cmd.cpp
class_name GmToolkitSystem
extends RefCounted

signal command_executed(cmd: String, success: bool, result_msg: String)
signal player_warped(target_pos: Vector3, map_name: String)
signal mob_spawned(vnum: int, count: int, pos: Vector3)

const MAP_PRESETS: Dictionary = {
	"village": Vector3(0.0, 0.0, 0.0),
	"sohan": Vector3(400.0, 0.0, 600.0),       # 冰山 Mount Sohan
	"desert": Vector3(200.0, 0.0, 300.0),      # 永壁沙漠 Yongbi Desert
	"temple": Vector3(100.0, 0.0, 500.0),      # 黄龙神殿 Hwang Temple
	"flame": Vector3(600.0, 0.0, 200.0),       # 烈焰原野 Doyyumhwan
	"catacomb": Vector3(500.0, 0.0, 500.0)     # 地下墓穴 Devil's Catacomb
}

# 解析并执行 GM 斜杠指令
func execute_command(cmd_string: String, ctx: Dictionary) -> Dictionary:
	var trimmed := cmd_string.strip_edges()
	if not trimmed.begins_with("/"):
		return {"ok": false, "reason": "NOT_A_COMMAND", "msg": "指令必须以 '/' 开头！"}

	var parts := trimmed.substr(1).split(" ", false)
	if parts.is_empty():
		return {"ok": false, "reason": "EMPTY_COMMAND"}

	var action := parts[0].to_lower()
	var res: Dictionary = {}

	match action:
		"item":
			res = _handle_item(parts, ctx)
		"level":
			res = _handle_level(parts, ctx)
		"gold":
			res = _handle_gold(parts, ctx)
		"set_skill", "skill":
			res = _handle_skill(parts, ctx)
		"warp", "map":
			res = _handle_warp(parts, ctx)
		"spawn_mob", "mob", "m":
			res = _handle_mob(parts, ctx)
		"help":
			res = _handle_help()
		_:
			res = {"ok": false, "reason": "UNKNOWN_COMMAND", "msg": "未知的 GM 指令【%s】！输入 /help 查看支持的指令列表。" % action}

	command_executed.emit(action, res.get("ok", false), res.get("msg", ""))
	return res

# /item <vnum> [count]
func _handle_item(parts: PackedStringArray, ctx: Dictionary) -> Dictionary:
	if parts.size() < 2 or not parts[1].is_valid_int():
		return {"ok": false, "reason": "SYNTAX_ERROR", "msg": "用法: /item <物品代码vnum> [数量count]"}

	var vnum: int = int(parts[1])
	var count: int = 1
	if parts.size() >= 3 and parts[2].is_valid_int():
		count = maxi(1, int(parts[2]))

	var inventory: Array = ctx.get("inventory", [])
	var empty_slot := -1
	for i in range(inventory.size()):
		if inventory[i] == null:
			empty_slot = i
			break

	if empty_slot == -1:
		return {"ok": false, "reason": "INVENTORY_FULL", "msg": "背包已满，无法生成物品！"}

	inventory[empty_slot] = {
		"vnum": vnum,
		"name": "道具_%d" % vnum,
		"count": count
	}

	return {
		"ok": true,
		"vnum": vnum,
		"count": count,
		"slot": empty_slot,
		"msg": "【GM】已成功生成物品 [vnum: %d, count: %d] 至背包格子 %d！" % [vnum, count, empty_slot]
	}

# /level <1-105>
func _handle_level(parts: PackedStringArray, ctx: Dictionary) -> Dictionary:
	if parts.size() < 2 or not parts[1].is_valid_int():
		return {"ok": false, "reason": "SYNTAX_ERROR", "msg": "用法: /level <1-105>"}

	var target_lv: int = clampi(int(parts[1]), 1, 105)
	var player_data: Dictionary = ctx.get("player_data", {})
	player_data["level"] = target_lv

	return {
		"ok": true,
		"level": target_lv,
		"msg": "【GM】角色等级已修改为 Lv %d！" % target_lv
	}

# /gold <amount>
func _handle_gold(parts: PackedStringArray, ctx: Dictionary) -> Dictionary:
	if parts.size() < 2 or not parts[1].is_valid_int():
		return {"ok": false, "reason": "SYNTAX_ERROR", "msg": "用法: /gold <金币数额>"}

	var amount: int = int(parts[1])
	var player_data: Dictionary = ctx.get("player_data", {})
	var current: int = int(player_data.get("gold", 0))
	var new_gold: int = maxi(0, current + amount)
	player_data["gold"] = new_gold

	return {
		"ok": true,
		"added": amount,
		"total_gold": new_gold,
		"msg": "【GM】金币已注入！当前金币：%d Yang。" % new_gold
	}

# /set_skill <skill_id> <1-40>
func _handle_skill(parts: PackedStringArray, ctx: Dictionary) -> Dictionary:
	if parts.size() < 3 or not parts[1].is_valid_int() or not parts[2].is_valid_int():
		return {"ok": false, "reason": "SYNTAX_ERROR", "msg": "用法: /set_skill <技能ID> <等级1-40> (40=P级)"}

	var skill_id: int = int(parts[1])
	var skill_lv: int = clampi(int(parts[2]), 1, 40)
	var skills: Dictionary = ctx.get("skills", {})
	skills[skill_id] = skill_lv

	var grade_str := "普通"
	if skill_lv >= 40:
		grade_str = "P级 (Perfect Master)"
	elif skill_lv >= 30:
		grade_str = "G级 (Grand Master)"
	elif skill_lv >= 20:
		grade_str = "M级 (Master)"

	return {
		"ok": true,
		"skill_id": skill_id,
		"skill_level": skill_lv,
		"grade": grade_str,
		"msg": "【GM】技能 [%d] 等级已调整为 %d (%s)！" % [skill_id, skill_lv, grade_str]
	}

# /warp <x> <y> 或 /map <preset_name>
func _handle_warp(parts: PackedStringArray, ctx: Dictionary) -> Dictionary:
	var target_pos := Vector3.ZERO
	var map_name := "custom"

	if parts.size() >= 3 and parts[1].is_valid_float() and parts[2].is_valid_float():
		target_pos = Vector3(float(parts[1]), 0.0, float(parts[2]))
	elif parts.size() >= 2:
		var preset_key: String = parts[1].to_lower()
		if MAP_PRESETS.has(preset_key):
			target_pos = MAP_PRESETS[preset_key]
			map_name = preset_key
		else:
			return {"ok": false, "reason": "UNKNOWN_MAP", "msg": "未知的预设地图！可用地图: %s" % str(MAP_PRESETS.keys())}
	else:
		return {"ok": false, "reason": "SYNTAX_ERROR", "msg": "用法: /warp <x> <y> 或 /map <地图名>"}

	player_warped.emit(target_pos, map_name)

	return {
		"ok": true,
		"position": target_pos,
		"map_name": map_name,
		"msg": "【GM】已瞬移传送至目标坐标 (%.1f, %.1f) [%s]！" % [target_pos.x, target_pos.z, map_name]
	}

# /spawn_mob <vnum> [count]
func _handle_mob(parts: PackedStringArray, ctx: Dictionary) -> Dictionary:
	if parts.size() < 2 or not parts[1].is_valid_int():
		return {"ok": false, "reason": "SYNTAX_ERROR", "msg": "用法: /spawn_mob <怪代码vnum> [数量count]"}

	var mob_vnum: int = int(parts[1])
	var count: int = 1
	if parts.size() >= 3 and parts[2].is_valid_int():
		count = maxi(1, int(parts[2]))

	var player_pos: Vector3 = ctx.get("player_pos", Vector3.ZERO)
	mob_spawned.emit(mob_vnum, count, player_pos)

	return {
		"ok": true,
		"mob_vnum": mob_vnum,
		"count": count,
		"spawn_pos": player_pos,
		"msg": "【GM】已在身旁召唤怪物 [vnum: %d, count: %d]！" % [mob_vnum, count]
	}

# /help
func _handle_help() -> Dictionary:
	return {
		"ok": true,
		"commands": [
			"/item <vnum> [count] - 生成物品",
			"/level <1-105> - 设定等级",
			"/gold <amount> - 注入金币",
			"/set_skill <id> <1-40> - 设定技能等级(40=P级)",
			"/map <village|sohan|desert|temple|flame|catacomb> - 传送至指定地图",
			"/warp <x> <y> - 坐标瞬移",
			"/spawn_mob <vnum> [count] - 刷怪/召唤首领"
		],
		"msg": "【GM指令帮助】输入对应命令快速调试单机环境！"
	}