extends Node
## Entry scene of Champions of Luneraria: title menu, match, return, rematch.
## Offline is a local host with bot-filled seats. Host/Join uses LuneSession (ENet).
## Legacy QA switches open the archived Saumwacht scene unchanged.

const Game = preload("res://scripts/luneraria/lune_game.gd")
const Menu = preload("res://scripts/luneraria/ui/lune_menu.gd")
const Session = preload("res://scripts/luneraria/net/lune_session.gd")
const LEGACY_SWITCHES: Array[String] = ["--smoke-test", "--faction-test", "--expedition-test", "--ringborke", "--legacy"]

var menu: MainMenu
var game: Node3D
var settings: Control
var session: Node
var _layer: CanvasLayer
var _last_options: Dictionary = {}

func _ready() -> void:
	for arg: String in OS.get_cmdline_user_args():
		if arg in LEGACY_SWITCHES:
			get_tree().change_scene_to_file.call_deferred("res://scenes/main.tscn")
			return
	DisplayServer.window_set_title("Champions of Luneraria")
	get_tree().auto_accept_quit = false
	get_tree().root.close_requested.connect(Soundscape.quit_game)
	_layer = CanvasLayer.new()
	_layer.layer = 10
	add_child(_layer)
	menu = Menu.new()
	_layer.add_child(menu)
	menu.start_requested.connect(func() -> void: start_match({"seed": int(Time.get_unix_time_from_system()) % 100000}))
	menu.quit_requested.connect(func() -> void: Soundscape.quit_game())
	menu.settings_requested.connect(toggle_settings)
	if menu.has_signal("host_requested"):
		menu.host_requested.connect(_host_match)
		menu.join_requested.connect(_join_match)
	settings = LuneSettings.new()
	_layer.add_child(settings)
	settings.visible = false
	settings.closed.connect(toggle_settings)
	menu.enter()
	# Platform smoke test of exported builds (macOS app, Windows): plays a short match alone.
	for arg: String in OS.get_cmdline_user_args():
		if arg.begins_with("--lune-smoke"):
			var smoke: Node = load("res://scripts/luneraria/lune_smoke.gd").new()
			smoke.setup(self, arg.get_slice("=", 1) if arg.contains("=") else "")
			add_child(smoke)

func start_match(options: Dictionary) -> void:
	var own_team_slots: Array[int] = [0, 1, 2]
	var human: int = own_team_slots[LuneMap.LANES.find(menu.lane)] if menu.lane in LuneMap.LANES else 1
	var bunds: Array = []
	var rng := RandomNumberGenerator.new()
	rng.seed = int(options.get("seed", 1))
	for slot: int in range(6):
		bunds.append(menu.bund if slot == human else DataCatalog.FACTIONS[rng.randi() % DataCatalog.FACTIONS.size()])
	_last_options = {"seed": int(options.get("seed", 1)), "human_slot": human, "bunds": bunds}
	_launch(_last_options)

func _host_match(port: int, display_name: String) -> void:
	_reset_session()
	session = Session.new()
	session.name = "LuneSession"
	add_child(session)
	var options := {"seed": int(Time.get_unix_time_from_system()) % 100000, "human_slot": 0, "bunds": []}
	var rng := RandomNumberGenerator.new()
	rng.seed = options.seed
	for slot: int in range(6):
		options.bunds.append(menu.bund if slot == 0 else DataCatalog.FACTIONS[rng.randi() % DataCatalog.FACTIONS.size()])
	var err: int = session.host_enet(port, options, display_name)
	if err == OK:
		_last_options = options
		_launch(_last_options)
	else:
		push_warning(session.last_error)
		menu.notify_error(session.last_error)
		_reset_session()

func _join_match(address: String, port: int, display_name: String) -> void:
	_reset_session()
	session = Session.new()
	session.name = "LuneSession"
	add_child(session)
	session.session_message.connect(func(text: String, is_error: bool) -> void:
		print(("FEHLER: " if is_error else "") + text))
	session.host_lost.connect(func() -> void:
		var reason: String = session.last_error if session != null else ""
		return_to_menu()
		menu.notify_error(reason))
	if session.join_enet(address, port, display_name) != OK:
		menu.notify_error(session.last_error)
		_reset_session()
		return
	# Every setup from the host (first join, rejoin, rematch) relaunches the match view.
	session.match_resetup.connect(func() -> void:
		if session != null and session.match_state != null:
			_last_options = {"seed": session.match_state.seed_value, "human_slot": session.local_slot, "bunds": []}
			_launch(_last_options))

func _reset_session() -> void:
	if session != null and is_instance_valid(session):
		session.close()
		session.queue_free()
	session = null

func _launch(options: Dictionary) -> void:
	# The rematch button lives inside the old match; detach it now, free it after the signal.
	if is_instance_valid(game):
		remove_child(game)
		game.queue_free()
	game = Game.new()
	add_child(game)
	game.input_blocked = func() -> bool: return menu.visible or settings.visible
	if session != null and is_instance_valid(session):
		game.session = session
	game.start(options)
	game.exit_requested.connect(return_to_menu)
	game.rematch_requested.connect(_rematch)
	game.hud.settings_requested.connect(toggle_settings)
	menu.leave()

func _rematch() -> void:
	_last_options.seed = int(_last_options.seed) + 1
	if session != null and is_instance_valid(session) and session.is_networked():
		if not session.is_authority():
			game.hud.notify("Eine Revanche startet der Host.", true)
			return
		session.host_rematch(_last_options.duplicate(true))
	_launch(_last_options)

func return_to_menu() -> void:
	if is_instance_valid(game):
		remove_child(game)
		game.queue_free()
		game = null
	_reset_session()
	menu._locked = false
	menu.pending_screen = MainMenu.Screen.TITLE
	menu.enter()

func toggle_settings() -> void:
	settings.visible = not settings.visible
	# Only an offline match pauses behind the settings; a network match keeps running.
	var networked: bool = session != null and is_instance_valid(session) and session.is_networked()
	if is_instance_valid(game) and not networked:
		game.paused = settings.visible or game.paused
	if settings.visible:
		settings.sync()

func _unhandled_input(event: InputEvent) -> void:
	if event is InputEventKey and event.pressed and not event.echo:
		if event.keycode == KEY_F1 or (event.keycode == KEY_ESCAPE and settings.visible):
			toggle_settings()
			get_viewport().set_input_as_handled()
		elif event.keycode in [KEY_M, KEY_F11]:
			if event.keycode == KEY_M:
				Preferences.muted = not Preferences.muted
			else:
				Preferences.fullscreen = not Preferences.fullscreen
			Preferences.commit()
			get_viewport().set_input_as_handled()