extends Node3D
const PlayerScript = preload("res://scripts/player.gd")
const ZombieScript = preload("res://scripts/zombie.gd")
const RoomScript = preload("res://scripts/room.gd")
const LeaderboardScript = preload("res://scripts/leaderboard.gd")
const StartScreenScript = preload("res://scripts/start_screen.gd")
const Profile = preload("res://scripts/player_profile.gd")
const MUSIC_PATH := "res://assets/audio/music/zombie_industrial_loop.ogg"
const MUSIC_VOLUME_DB := -11.0
const TouchControls = preload("res://scripts/touch_controls.gd")
var player: CharacterBody3D
var room: Node3D
var music: AudioStreamPlayer
var music_started := false
var touch: Node
var hud: CanvasLayer
var navigation: Node
var score := 0
var wave := 0
var alive := 0
var spawning := false
var wave_pending := false
var smoke := false
var last_window := -1
var leaderboard: Node
var start_screen: CanvasLayer
var profile := {}
var score_submitted := false

func _ready() -> void:
	smoke = "--smoke" in OS.get_cmdline_user_args()
	profile = Profile.load_profile()
	room = Node3D.new()
	room.set_script(RoomScript)
	add_child(room)
	player = CharacterBody3D.new()
	player.set_script(PlayerScript)
	player.position = Vector3(0, 0.1, 0)
	add_child(player)
	var envnode := WorldEnvironment.new()
	var env := Environment.new()
	env.background_mode = Environment.BG_SKY
	var sky_material := PanoramaSkyMaterial.new()
	sky_material.panorama = load("res://assets/textures/sky/space_panorama.png")
	env.sky = Sky.new()
	env.sky.sky_material = sky_material
	# Solo sfondo: illuminazione e riflessi non dipendono dal cielo scuro.
	env.reflected_light_source = Environment.REFLECTION_SOURCE_DISABLED
	env.ambient_light_source = Environment.AMBIENT_SOURCE_COLOR
	env.ambient_light_color = Color(0.28, 0.36, 0.48)
	env.ambient_light_energy = 0.12
	# Glow compensates for the missing volumetric fog (unsupported in Compatibility):
	# a high threshold so only the fire core blooms, keeping the amber HUD readable.
	env.glow_enabled = true
	env.glow_intensity = 0.45
	env.glow_strength = 1.0
	env.glow_bloom = 0.05
	env.glow_mix = 0.05
	env.glow_hdr_threshold = 1.3
	env.glow_blend_mode = Environment.GLOW_BLEND_MODE_ADDITIVE
	for level in [2, 3, 4]:
		env.set("glow_levels/%d" % level, 1.0 if level == 3 else 0.4)
	envnode.environment = env
	add_child(envnode)
	var office := Node3D.new()
	office.set_script(preload("res://scripts/office_atmosphere.gd"))
	add_child(office)
	navigation = Node.new()
	navigation.set_script(preload("res://scripts/room_navigation.gd"))
	add_child(navigation)
	var canvas := CanvasLayer.new()
	add_child(canvas)
	hud = CanvasLayer.new()
	hud.set_script(preload("res://scripts/game_hud.gd"))
	add_child(hud)
	var cross := Label.new()
	cross.text = "+"
	cross.add_theme_font_size_override("font_size", 30)
	canvas.add_child(cross)
	cross.set_anchors_and_offsets_preset(Control.PRESET_CENTER)
	_setup_music()
	_setup_touch()
	leaderboard = Node.new()
	leaderboard.set_script(LeaderboardScript)
	leaderboard.player_id = profile["player_id"]
	add_child(leaderboard)
	leaderboard.leaderboard_ready.connect(_on_leaderboard_ready)
	leaderboard.leaderboard_failed.connect(_on_leaderboard_failed)
	leaderboard.score_submitted.connect(_on_score_submitted)
	leaderboard.submit_failed.connect(_on_submit_failed)
	player.died.connect(_on_player_died)
	start_screen = CanvasLayer.new()
	start_screen.set_script(StartScreenScript)
	start_screen.player = player
	start_screen.leaderboard = leaderboard
	start_screen.profile = profile
	add_child(start_screen)
	start_screen.started.connect(_on_start_pressed)
	if OS.has_feature("web"):
		if touch != null:
			touch.enabled = false          # i tocchi servono alla schermata iniziale
	if smoke:
		get_tree().create_timer(12).timeout.connect(func():
			print("SMOKE: wave=", wave, " alive=", alive, " player_hp=", player.hp)
			get_tree().quit())

## Il pulsante GIOCA della schermata iniziale delega qui: sblocca l'audio (policy dei
## browser: serve un gesto dell'utente) e avvia la prima ondata. I test headless
## chiamano la stessa funzione con save_profile=false per non toccare il profilo reale.
func _on_start_pressed(player_name: String) -> void:
	start_game(player_name, true)

func start_game(player_name: String, save_profile := true) -> void:
	profile["name"] = player_name
	if save_profile:
		Profile.save_profile(profile)
	if not player.touch_mode:
		Input.mouse_mode = Input.MOUSE_MODE_CAPTURED
	if touch != null:
		touch.enabled = true
	if start_screen != null:
		start_screen.queue_free()
		start_screen = null
	_start_music()
	_next_wave()

## Alla morte si invia UNA volta il punteggio finale con nome e id del giocatore.
func _on_player_died() -> void:
	if score_submitted:
		return
	score_submitted = true
	if int(score) > int(profile.get("best", 0)):
		profile["best"] = score
		Profile.save_profile(profile)
	player.set_death_note("invio del punteggio in corso...")
	leaderboard.submit(profile["name"], score)

func _on_score_submitted(info: Dictionary) -> void:
	var total := int(info.get("total", 0))
	player.set_death_note("PUNTEGGIO %d — %d° su %d partite" % [score, int(info.get("rank", 0)), total])
	leaderboard.fetch()

func _on_submit_failed(reason: String) -> void:
	player.set_death_note("punteggio non inviato (%s)" % reason)

func _on_leaderboard_ready(rows: Array, total: int, me: Dictionary) -> void:
	if start_screen != null:
		start_screen.show_leaderboard(rows, total, me)

func _on_leaderboard_failed(reason: String) -> void:
	if start_screen != null:
		start_screen.show_leaderboard_error(reason)

## Nota: qui non c'e' piu' nessuna rete di sicurezza sull'input. La partita parte
## solo dal pulsante GIOCA della schermata iniziale (segnale `started`): un click o un
## tocco sullo sfondo del menu non deve avviare nulla.

## Controlli on-screen: attivi su browser mobile o touchscreen, forzabili con
## --touch / --no-touch sulla riga di comando e con ?touch=1 / ?touch=0 sul Web.
func _setup_touch() -> void:
	var forced := TouchControls.force_mode()
	if not (forced > 0 or (forced == 0 and TouchControls.should_auto_enable())):
		return
	player.touch_mode = true
	# Su un dispositivo touch il pointer lock non serve e su desktop forzato
	# ruberebbe il cursore: nessuna cattura del mouse in modalita' touch.
	Input.mouse_mode = Input.MOUSE_MODE_VISIBLE
	touch = CanvasLayer.new()
	touch.set_script(TouchControls)
	touch.player = player
	# Su desktop forzato con --touch i drag del mouse valgono come tocchi,
	# cosi' la UI e' provabile anche senza dispositivo touch.
	touch.mouse_fallback = forced > 0 and not DisplayServer.is_touchscreen_available()
	add_child(touch)

## Colonna sonora: industrial metal strumentale su loop senza giunzione udibile.
func _setup_music() -> void:
	music = AudioStreamPlayer.new()
	music.name = "Music"
	music.stream = load(MUSIC_PATH)
	music.volume_db = MUSIC_VOLUME_DB
	if music.stream is AudioStreamOggVorbis:
		music.stream.loop = true
	add_child(music)
	music.add_to_group("music")
	# Rete di sicurezza: se il flag di loop mancasse, il brano riparte a fine coda.
	music.finished.connect(_restart_music)

func _start_music() -> void:
	if music_started or music == null:
		return
	music_started = true
	music.play()

func _restart_music() -> void:
	if music_started and is_instance_valid(music):
		music.play()

func _process(_dt: float) -> void:
	if hud:
		hud.update_status(player, wave, score)

func zombies_for_wave(number: int) -> int:
	return 4 + number * 2

func _next_wave() -> void:
	wave_pending = false
	if player.hp <= 0 or spawning:
		return
	wave += 1
	spawning = true
	for i in zombies_for_wave(wave):
		if player.hp <= 0:
			break
		_spawn()
		await get_tree().create_timer(0.8).timeout
	spawning = false
	_check_wave()

## Sceglie una finestra a caso fra quelle disponibili, evitando di ripetere
## l'ultima usata: gli zombie entrano da aperture diverse invece che sempre dalle
## stesse quattro posizioni fisse.
func _pick_window() -> int:
	var count: int = room.windows.size()
	if count == 0:
		return -1
	if count == 1:
		return 0
	var index: int = randi() % count
	if index == last_window:
		index = (last_window + 1 + randi() % (count - 1)) % count
	return index

func _spawn() -> void:
	var chosen := _pick_window()
	if chosen < 0:
		return
	last_window = chosen
	var window: Dictionary = room.windows[chosen]
	var slots: Array = window.slots
	var start: Vector3 = slots[randi() % slots.size()]        # slot casuale nella finestra
	var face: Vector3 = window.center
	var inward: Vector3 = window.normal
	var zombie := CharacterBody3D.new()
	zombie.set_script(ZombieScript)
	zombie.player = player
	zombie.navigation = navigation
	zombie.position = start
	add_child(zombie)
	alive += 1
	zombie.killed.connect(func(headshot: bool):
		score += 150 if headshot else 100
		alive -= 1
		_check_wave())
	var tween := zombie.create_tween()
	zombie.entry_tween = tween
	tween.tween_property(zombie, "position", face + Vector3(0, 1.55, 0), 1.2)
	tween.tween_callback(func():
		var glass = window.glass
		if is_instance_valid(glass):
			room.shatter_glass(glass))                             # solo la finestra usata
	tween.tween_property(zombie, "position", face + inward * 1.4 + Vector3(0, 0.1, 0), 0.8)
	tween.tween_callback(func(): zombie.entering = false)

func _check_wave() -> void:
	if alive == 0 and not spawning and not wave_pending and player.hp > 0:
		wave_pending = true
		get_tree().create_timer(3).timeout.connect(_next_wave)