extends Node2D

# Preview, not a test - #58's aim-state screenshot: two laser ships (one
# ready, one rearming), aiming with the beam preview drawn and enemies
# placed along its line.
#
#   bash tests/screenshot.sh res://tests/_laser_aim_preview.tscn /tmp/laser.png 20 720x1280


func _ready() -> void:
	GameState.buildings.clear()
	GameState.extractors.clear()
	GameState.transporters.clear()
	GameState.vessel_levels["unlock_laser"] = 1
	GameState.intro_active = false
	# A shot the fleet cannot pay for is refused before aiming starts, so
	# without this the preview drew no guide at all - the state it exists
	# to show. Deposited before Main is built, like test_laser_vessel.gd.
	GameState.deposit_fleet_resource(GameState.RESOURCE_ENERGY, 40)
	var main: Node = load("res://world/Main.tscn").instantiate()
	add_child(main)
	main.get_node("BackgroundLayer").visible = false
	main.get_node("AsteroidField").visible = false
	main.get_node("PlanetField").visible = false
	main.get_node("BuildingField").visible = false
	main.get_node("EnemySpawner").set_process(false)
	main.get_node("AsteroidField").set_process(false)
	var fleet: Node = main.get_node("Fleet")
	# Three, not four: the starting fleet holds three hulls until the skill
	# tree widens it, and a fourth entry was silently dropped - which took the
	# ready laser with it and left this preview with nothing to aim.
	fleet.spawn_ships(3, Vector2.ZERO, PackedStringArray([
		GameState.VESSEL_SHIELD, GameState.VESSEL_LASER,
		GameState.VESSEL_LASER]))
	var skill: Node = main.get_node("LaserController")
	skill._process(0.0)
	# Show both per-ship states in one frame: one laser ship rearming, the
	# other ready and supplying the shot.
	var rearming: Node = fleet.ships[1].get_component("laser")
	rearming.consume_shot()
	rearming.tick(rearming.cooldown_duration * 0.5)
	main.get_node("Camera2D").zoom = Vector2(1.8, 1.8)
	var button: Control = main.get_node("UI/LaserButton")
	var press := InputEventScreenTouch.new()
	press.index = 9
	press.position = button.global_position + button.size * 0.5
	press.pressed = true
	skill.handle_touch(press)
	# Enemies BEFORE the drag, so the aim helper actually sees them. A nearer
	# one on the heading and a further one just off it: the state this preview
	# exists to show is the drag reaching past the first to name the second.
	var heading: Vector2 = Vector2(-245.0, -235.0).normalized()
	var reach: float = skill._aim_max_range()
	var origin: Vector2 = fleet.get_centroid()
	var far_offset: Vector2 = heading.rotated(deg_to_rad(8.0)) * 1900.0
	for offset in [heading * 900.0, far_offset]:
		var enemy: Node = load("res://enemies/Enemy.tscn").instantiate()
		enemy.position = origin + offset
		main.add_child(enemy)
		enemy.speed = 0.0   # after add_child - _ready() sets it from the definition

	var drag := InputEventScreenDrag.new()
	drag.index = 9
	# Dragged out to the further enemy's depth rather than to the beam's end.
	drag.position = press.position + far_offset.normalized() \
		* (1900.0 / reach * LaserController.DRAG_RADIUS)
	skill.handle_drag(drag)
	# The zoom eases now, so a preview that captures the first frame would
	# catch it mid-move. Settle it before the screenshot is taken.
	for _step in range(40):
		skill._process(0.05)