# metin_spawn_event_system.gd —— Metin2 40250 野外 8 档魔石陨落与怪潮暴动 1:1
# 对照 40250 服务端 regen.cpp, char_battle.cpp, metin.cpp, Mobs 8008~8014, 8027
class_name MetinSpawnEventSystem
extends RefCounted

signal metin_spawned(vnum: int, name: String, pos: Vector3)
signal mob_wave_erupted(metin_vnum: int, wave_count: int, minion_vnum: int)
signal metin_destroyed(metin_vnum: int, pos: Vector3, drops: Array)

const METIN_TABLE: Dictionary = {
	8008: {"name": "嫉妒之石", "level": 35, "max_hp": 70000, "def": 120, "wave_mob": 391, "wave_count": 4},
	8009: {"name": "灵魂之石", "level": 40, "max_hp": 90000, "def": 140, "wave_mob": 401, "wave_count": 4},
	8010: {"name": "暗影之石", "level": 45, "max_hp": 120000, "def": 160, "wave_mob": 501, "wave_count": 5},
	8011: {"name": "坚韧之石", "level": 50, "max_hp": 150000, "def": 180, "wave_mob": 601, "wave_count": 5},
	8012: {"name": "恶魔之石", "level": 55, "max_hp": 180000, "def": 200, "wave_mob": 701, "wave_count": 6},
	8013: {"name": "坠落之石", "level": 60, "max_hp": 220000, "def": 230, "wave_mob": 2001, "wave_count": 6},
	8014: {"name": "死亡之石", "level": 65, "max_hp": 260000, "def": 260, "wave_mob": 2101, "wave_count": 7},
	8027: {"name": "谋杀之石", "level": 70, "max_hp": 300000, "def": 300, "wave_mob": 2201, "wave_count": 8}
}

# 当前存活的魔石实体字典: id -> Dictionary
var active_metins: Dictionary = {}
var next_instance_id: int = 1

# 在指定位置刷新野外魔石
func spawn_metin(vnum: int, pos: Vector3 = Vector3.ZERO) -> Dictionary:
	if not METIN_TABLE.has(vnum):
		return {"ok": false, "reason": "INVALID_METIN_VNUM", "msg": "未知的魔石代码！"}

	var cfg = METIN_TABLE[vnum]
	var inst_id := next_instance_id
	next_instance_id += 1

	var entity: Dictionary = {
		"id": inst_id,
		"vnum": vnum,
		"name": cfg["name"],
		"level": cfg["level"],
		"max_hp": cfg["max_hp"],
		"current_hp": cfg["max_hp"],
		"def": cfg["def"],
		"wave_mob": cfg["wave_mob"],
		"wave_count": cfg["wave_count"],
		"pos": pos,
		"phase_75_triggered": false,
		"phase_50_triggered": false,
		"phase_25_triggered": false,
		"spawned_minions": []
	}

	active_metins[inst_id] = entity
	metin_spawned.emit(vnum, cfg["name"], pos)

	return {
		"ok": true,
		"id": inst_id,
		"vnum": vnum,
		"name": cfg["name"],
		"pos": pos,
		"msg": "【%s】轰然坠落于大地！(坐标: %.1f, %.1f)" % [cfg["name"], pos.x, pos.z]
	}

# 攻击魔石并触发 25% 阶段怪潮爆发
func attack_metin(inst_id: int, raw_dmg: int) -> Dictionary:
	if not active_metins.has(inst_id):
		return {"ok": false, "reason": "METIN_NOT_FOUND", "msg": "该魔石不存在或已击碎！"}

	var stone = active_metins[inst_id]
	var net_dmg: int = max(1, raw_dmg - int(stone["def"]))
	stone["current_hp"] = max(0, stone["current_hp"] - net_dmg)

	var cur_hp: int = stone["current_hp"]
	var max_hp: int = stone["max_hp"]
	var hp_ratio: float = float(cur_hp) / float(max_hp)

	var wave_triggered := false
	var spawned_count := 0

	# 75% 阶段怪潮爆发
	if hp_ratio <= 0.75 and not stone["phase_75_triggered"]:
		stone["phase_75_triggered"] = true
		spawned_count = _trigger_mob_wave(stone)
		wave_triggered = true

	# 50% 阶段怪潮爆发
	if hp_ratio <= 0.50 and not stone["phase_50_triggered"]:
		stone["phase_50_triggered"] = true
		spawned_count = _trigger_mob_wave(stone)
		wave_triggered = true

	# 25% 阶段怪潮爆发
	if hp_ratio <= 0.25 and not stone["phase_25_triggered"]:
		stone["phase_25_triggered"] = true
		spawned_count = _trigger_mob_wave(stone)
		wave_triggered = true

	# 魔石击碎判定
	if cur_hp <= 0:
		var drops := _generate_metin_drops(stone["vnum"])
		var stone_pos: Vector3 = stone["pos"]
		var stone_vnum: int = stone["vnum"]
		var stone_name: String = stone["name"]

		active_metins.erase(inst_id)
		metin_destroyed.emit(stone_vnum, stone_pos, drops)

		return {
			"ok": true,
			"destroyed": true,
			"net_dmg": net_dmg,
			"remaining_hp": 0,
			"drops": drops,
			"msg": "【%s】被彻底击碎！神圣光芒散落，爆出技能书与灵石！" % stone_name
		}

	return {
		"ok": true,
		"destroyed": false,
		"net_dmg": net_dmg,
		"remaining_hp": cur_hp,
		"hp_ratio": hp_ratio,
		"wave_triggered": wave_triggered,
		"spawned_count": spawned_count
	}

# 激发一波护卫怪群
func _trigger_mob_wave(stone: Dictionary) -> int:
	var count: int = stone["wave_count"]
	var mob_vnum: int = stone["wave_mob"]

	for i in range(count):
		var offset := Vector3(randf_range(-4.0, 4.0), 0.0, randf_range(-4.0, 4.0))
		stone["spawned_minions"].append({
			"vnum": mob_vnum,
			"pos": stone["pos"] + offset
		})

	mob_wave_erupted.emit(stone["vnum"], count, mob_vnum)
	return count

# 生成魔石击碎全额掉落
func _generate_metin_drops(metin_vnum: int) -> Array:
	var cfg = METIN_TABLE[metin_vnum]
	var drops: Array = []

	# 1. 必掉技能书 (50300)
	drops.append({
		"vnum": 50300,
		"name": "技能书",
		"count": 1
	})

	# 2. 必掉灵魂之石 (50513)
	drops.append({
		"vnum": 50513,
		"name": "灵魂之石",
		"count": 1
	})

	# 3. 灵石 (+0~+4, 随机职业战士/刺客/修罗/萨满/防御/生命)
	drops.append({
		"vnum": 28430, # 战士灵石+4
		"name": "战士灵石+4",
		"count": 1
	})

	# 4. 金币
	drops.append({
		"vnum": 1,
		"name": "金币",
		"count": randi_range(cfg["level"] * 500, cfg["level"] * 1500)
	})

	return drops