extends Node3D
## Glitschkönig: Reveal, Quirxel-Schüsse, Split, Flucht (DESIGN.md §12).

enum Phase { FULL, SPLIT, FLEE, DONE }

var _phase: Phase = Phase.FULL
var _revealed: bool = false
var _splits_done: int = 0
const SPLITS_MAX := 2

func _ready() -> void:
	GameState.current_scene_id = "final_boss"
	GameState.heal_full()
	_revealed = bool(GameState.get_flag("glitsch_revealed", false))
	if not _revealed:
		_do_reveal()
	var boss := get_node_or_null("Hongkong")
	if boss:
		boss.set("max_hp", 16)
		boss.set("hp", 16)
		boss.set("ai_enabled", true)
		boss.set("move_speed", 1.8)
		boss.set("attack_damage", 1)
		boss.set("attack_cooldown", 1.4)
		boss.set("death_cause_key", "death_default")
		boss.set("billboard_height", SpriteFit.WORLD_BOSS_HEIGHT)
		boss.set("shout_key", "dialog_hongkong_boss")
		boss.set("shout_interval", 8.0)
		if boss.has_signal("hit"):
			boss.hit.connect(_on_boss_hit)
		if boss.has_signal("defeated"):
			boss.defeated.connect(_on_boss_defeated)
	var t := Timer.new()
	t.wait_time = 2.2
	t.autostart = true
	t.timeout.connect(_spawn_quirxel)
	add_child(t)

func _do_reveal() -> void:
	GameState.set_flag("glitsch_revealed", true)
	Inventory.add_item("banana", 1)
	Inventory.add_item("wartchen", 1)
	var ui := get_node_or_null("/root/UIRoot")
	if ui and ui.has_method("show_dialog"):
		ui.show_dialog_key("dialog_reveal", 5.5)
		await get_tree().create_timer(2.0).timeout
		ui.show_dialog_key("dialog_boss_unclever", 3.5)

func _on_boss_hit(remaining: int) -> void:
	var boss := get_node_or_null("Hongkong")
	if remaining <= 10 and _splits_done < SPLITS_MAX and _phase != Phase.FLEE:
		_phase = Phase.SPLIT
		_splits_done += 1
		_spawn_split_clone()
		var ui := get_node_or_null("/root/UIRoot")
		if ui and ui.has_method("show_dialog"):
			ui.show_dialog("Er teilt sich wie Minecraft-Schleim!", 2.5)
	if remaining <= 3 and _phase != Phase.DONE:
		_phase = Phase.FLEE
		if boss:
			boss.set("flee_below_hp", 99)
			boss.set("move_speed", 5.5)
			boss.set("ai_enabled", true)

func _spawn_split_clone() -> void:
	var scene: PackedScene = load("res://scenes/prefabs/enemy.tscn")
	if scene == null:
		return
	var c: Node3D = scene.instantiate()
	c.name = "GlitschSplit_%d" % _splits_done
	add_child(c)
	c.global_position = Vector3(randf_range(-4, 4), 0.1, -2)
	c.set("max_hp", 5)
	c.set("texture_path", "res://assets/sprites/placeholders/glitschkoenig.png")
	c.set("ai_enabled", true)
	c.set("move_speed", 3.2)
	c.set("attack_damage", 1)
	c.set("billboard_height", 1.2)
	c.set("death_cause_key", "death_quirxel")
	var bill = c.get_node_or_null("BillboardSprite")
	if bill and bill.has_method("set_texture"):
		var tex: Texture2D = load("res://assets/sprites/placeholders/glitschkoenig.png")
		if tex:
			bill.set_texture(tex)

func _spawn_quirxel() -> void:
	if _phase == Phase.DONE or GameState.get_flag("hongkong_defeated", false):
		return
	var scene: PackedScene = load("res://scenes/prefabs/quirxel_projectile.tscn")
	if scene == null:
		return
	var player := get_tree().get_first_node_in_group("player")
	var boss := get_node_or_null("Hongkong")
	var origin := Vector3(0, 0.8, -2)
	if boss is Node3D:
		origin = (boss as Node3D).global_position + Vector3(0, 0.9, 0)
	var q: Node3D = scene.instantiate()
	add_child(q)
	q.global_position = origin + Vector3(randf_range(-1.5, 1.5), 0, randf_range(-1, 1))
	var dir := Vector3(0, 0, 1)
	if player is Node3D:
		dir = ((player as Node3D).global_position + Vector3(0, 0.8, 0) - q.global_position).normalized()
	q.set("velocity", dir * 7.5)

func _on_boss_defeated() -> void:
	_phase = Phase.DONE
	Achievements.unlock("beat_hongkong")
	GameState.set_flag("hongkong_defeated", true)
	var ui := get_node_or_null("/root/UIRoot")
	if ui and ui.has_method("show_dialog"):
		ui.show_dialog_key("dialog_hongkong_boss", 3.0)
		await get_tree().create_timer(2.5).timeout
		ui.show_dialog_key("dialog_bear_end", 5.0)
	await get_tree().create_timer(3.5).timeout
	GameState.goto_scene("end_screen")