extends Node
## UI smoke check with the real main scene and ordinary economic commands.
## Run: godot --path . res://tools/screenshot.tscn

const OUT_DIR := "res://docs/screenshots"


func _ready() -> void:
	get_tree().create_timer(25.0).timeout.connect(func():
		printerr("FAIL: graphical smoke check did not finish.")
		get_tree().quit(1))
	DirAccess.make_dir_recursive_absolute(OUT_DIR)
	var main: Node3D = load("res://scenes/main.tscn").instantiate()
	add_child(main)
	await _wait(1.2)
	_capture("menu-overlay.png")
	main.hud._overlay_action.pressed.emit()
	main.hud._starter_button.pressed.emit()
	await _wait(0.5)
	assert(GameState.phase == GameState.Phase.BUILD)
	assert(EconomyManager.get_team(0).gold == 40)
	assert(EconomyManager.get_team(0).roster.size() == 3)
	main.selected_uid = EconomyManager.get_team(0).roster[0].uid
	main.hud.selected_uid = main.selected_uid
	main._update_selection_visuals()
	await _wait(0.3)
	_capture("build-phase.png")
	main.hud._pause_button.grab_focus()
	_key(KEY_SPACE)
	await _wait(3.0)
	assert(GameState.phase == GameState.Phase.COMBAT)
	_capture("combat-phase.png")
	main.hud._pause_button.pressed.emit()
	var paused_time: float = main.battle.elapsed
	await _wait(0.25)
	assert(is_equal_approx(main.battle.elapsed, paused_time))
	main.hud._pause_button.pressed.emit()
	_key(KEY_TAB)
	assert(main.viewed_team == 1)
	# Finish using real fixed combat steps; no balance values are modified.
	WaveManager.set_physics_process(false)
	for _step in range(5400):
		if GameState.phase != GameState.Phase.COMBAT:
			break
		WaveManager.advance(1.0 / 60.0)
	assert(GameState.phase == GameState.Phase.RESULTS)
	main.hud._ready_button.pressed.emit()
	assert(GameState.wave == 2 and GameState.phase == GameState.Phase.BUILD)
	main.hud._front_button.pressed.emit()
	await _wait(0.2)
	var cell_point: Vector2 = main.camera.unproject_position(Vector3(-14, 0, 7))
	main.hud._shop_buttons["g01"].pressed.emit()
	# Route through Godot's real input path, including plane picking and grid snap.
	var motion := InputEventMouseMotion.new()
	motion.position = cell_point
	get_viewport().push_input(motion, true)
	await get_tree().process_frame
	var click := InputEventMouseButton.new()
	click.position = cell_point
	click.button_index = MOUSE_BUTTON_LEFT
	click.pressed = true
	get_viewport().push_input(click, true)
	await get_tree().process_frame
	click = click.duplicate()
	click.pressed = false
	get_viewport().push_input(click, true)
	await get_tree().process_frame
	assert(EconomyManager.get_team(0).roster.size() == 4)
	assert(EconomyManager.get_team(0).roster[3].cell == Vector2i(0, 7))
	main.hud._undo.pressed.emit()
	assert(EconomyManager.get_team(0).roster.size() == 3)
	print("PASS: HUD start, formation, keyboard shortcuts with button focus, combat, pause, front switch, next wave, mouse placement and undo.")
	await Soundscape.quit_game(0)


func _wait(seconds: float) -> void:
	await get_tree().create_timer(seconds).timeout


func _key(keycode: int) -> void:
	var event := InputEventKey.new()
	event.keycode = keycode
	event.pressed = true
	get_viewport().push_input(event, true)
	event = event.duplicate()
	event.pressed = false
	get_viewport().push_input(event, true)


func _capture(file_name: String) -> void:
	var image: Image = get_viewport().get_texture().get_image()
	var path: String = OUT_DIR + "/" + file_name
	image.save_png(path)
	print("Saved ", path)