extends Node
## Boot the client windowed, capture a few screens, and quit.
##
##   SHOT_DIR=/tmp/shots godot --path . res://tools/screenshot.tscn
##
## This exists because UI is the one part of the game the rest of the tooling
## cannot check. `check.sh` proves it parses, the suite proves the theme
## resolves, the smoke test proves nothing errors -- and all three passed
## while the entire interface rendered unstyled, because Godot's theme
## inheritance breaks at the first non-Control parent and nothing had ever
## looked at the screen.
##
## Needs a real display, so it is not part of any automated gate. Run it after
## touching anything under src/ui/ and open the files.

const GAME := preload("res://src/game.tscn")
## Frame numbers, not seconds: the point is a deterministic sequence, and a
## windowed client at 60fps gets there in about four seconds.
const AT_MENU := 30
const ENTER_GAME := 34
const AT_GAME := 200
const OPEN_MENU := 210
const AT_INGAME_MENU := 240
const OPEN_SETTINGS := 250
const AT_SETTINGS := 280
const OPEN_CREDITS := 290
const AT_CREDITS := 320
const DONE := 330

var _frame: int = 0
var _game: Node = null
var _menu: Control = null
var _dir: String = "user://"


func _ready() -> void:
	GameOpts.parse()
	Engine.physics_ticks_per_second = SimConfig.TICK_RATE
	Settings.load_and_apply()
	var from_env := OS.get_environment("SHOT_DIR")
	if not from_env.is_empty():
		_dir = from_env
	get_window().size = Vector2i(1280, 720)
	_menu = preload("res://src/ui/main_menu.gd").new()
	add_child(_menu)


func _process(_delta: float) -> void:
	_frame += 1
	match _frame:
		AT_MENU:
			_grab("menu")
		ENTER_GAME:
			_menu.queue_free()
			Net.host(27455)
			Net.start_local_client()
			_game = GAME.instantiate()
			add_child(_game)
		AT_GAME:
			_grab("game")
		OPEN_MENU:
			_game.get_node("GameMenu").open()
		AT_INGAME_MENU:
			_grab("menu_ingame")
		OPEN_SETTINGS:
			_game.get_node("GameMenu").close()
			_game.get_node("SettingsScreen").open()
		AT_SETTINGS:
			_grab("settings")
		OPEN_CREDITS:
			_game.get_node("SettingsScreen").visible = false
			_game.get_node("CreditsScreen").open()
		AT_CREDITS:
			_grab("credits")
		DONE:
			Net.shutdown()
			get_tree().quit(0)


func _grab(shot_name: String) -> void:
	var path := "%s/shot_%s.png" % [_dir, shot_name]
	var err := get_viewport().get_texture().get_image().save_png(path)
	if err != OK:
		printerr("could not write %s (error %d)" % [path, err])
		return
	print("saved ", path)