extends SceneTree
var failures := 0
var starts := 0
var wins := 0
var losses := 0
func check(value: bool, message: String) -> void:
	if not value:
		failures += 1
		push_error(message)
func _initialize() -> void:
	call_deferred("run")
func run() -> void:
	var g = load("res://games/space_invaders/SpaceInvaders.tscn").instantiate()
	root.add_child(g)
	g.set_physics_process(false)
	g.sound_enabled = false
	g.game_started.connect(func(): starts += 1)
	g.game_won.connect(func(): wins += 1)
	g.game_lost.connect(func(): losses += 1)
	check(g.aliens.size()==55 and g.shields.size()==4,"Initial fleet/shields")
	check(g.start_game() and not g.start_game(),"Start guard")
	g._physics_process(2.1)
	check(g.phase=="play" and starts==1,"Ready and event")
	check(g.fire() and not g.fire(),"One player shot")
	g.remove_shot()
	check(g.shot_count==1,"Shot sequence")
	var a: Vector2 = g.aliens[0].position
	var b: Vector2 = g.aliens[1].position
	g.march()
	check(g.aliens[0].position==a+Vector2(2,0) and g.aliens[1].position==b,"Ripple movement")
	for alien in g.aliens: alien.alive=false
	g.aliens[0].alive=true
	g.aliens[0].position=Vector2(208,100)
	g.fleet_cursor=0
	g.march()
	check(g.fleet_direction==-1 and g.aliens[0].position.y==108,"Edge descent")
	var shield: Dictionary = g.shields[0]
	var point := Vector2(shield.position)+Vector2(12,4)
	check(g.shield_hit(point,true),"Shield collision")
	check(shield.image.get_pixel(12,4).a==0,"Destructible shield pixel")
	check(not g.shield_hit(point,true),"Hole allows shot through")
	g.new_wave()
	for alien in g.aliens: alien.alive=false
	g.aliens[0].alive=true
	g.aliens[0].position=Vector2(100,100)
	g.hit_pause=1
	g.shot_active=true
	g.player_shot=Vector2(100,110)
	g.step_world(.05)
	check(not g.aliens[0].alive and g.score==10 and g.phase=="clear","Alien hit/clear")
	g._physics_process(1.6)
	check(wins==1 and not g.is_running,"Win event")
	g.start_game()
	g.waves_to_win=0
	g.phase="clear"
	g.phase_time=0
	g._physics_process(.01)
	check(g.wave==2 and g.aliens[44].position.y==96,"Next wave height")
	g.phase="play"
	g.lives=1
	g.die()
	g._physics_process(1.6)
	check(losses==1 and g.phase=="lost","Loss event")
	g.start_game()
	g.add_score(1500)
	var lives: int = g.lives
	g.add_score(2000)
	check(lives==g.starting_lives+1 and g.lives==lives,"One bonus life")
	g.reset_game()
	g.high_score=9999
	g.last_score=420
	var original_starts := starts
	var original_wins := wins
	var original_losses := losses
	g.begin_demo()
	for i in range(1600): g._physics_process(1.0/60)
	check(not g.demo and not g.is_running and g.phase=="attract","Demo exit")
	check(g.high_score==9999 and g.score==420,"Demo score isolation")
	check(starts==original_starts and wins==original_wins and losses==original_losses,"Demo event isolation")
	g.begin_demo()
	check(g.start_game() and not g.demo and g.score==0,"Start interrupts demo")
	g.reset_game()
	check(g.phase=="attract" and not g.is_running,"Reset")
	g.start_game()
	g.phase="play"
	g.hit_pause=1
	g.saucer_active=true
	g.saucer_x=100
	g.shot_count=8
	g.shot_active=true
	g.player_shot=Vector2(100,50)
	g.step_world(.025)
	check(g.score==300 and not g.saucer_active and not g.shot_active,"Saucer score sequence and collision")
	g.hit_pause=1
	g.shot_delay=0
	g.fire()
	g.player_shot=Vector2(16,180)
	g.bombs.clear()
	g.bombs.append({"position":Vector2(16,174),"kind":0})
	g.step_world(.01)
	check(not g.shot_active and g.bombs.is_empty(),"Projectile interception")
	g.bombs.append({"position":Vector2(g.player_x,214),"kind":0})
	g.step_world(.025)
	check(g.phase=="dead","Enemy projectile hits player")
	g._physics_process(1.6)
	g._physics_process(1.1)
	check(g.phase=="play" and g.bombs.is_empty(),"Respawn clears threats")
	for alien in g.aliens: alien.alive=false
	g.aliens[0].alive=true
	g.aliens[0].position=Vector2(100,216)
	g.fleet_cursor=0
	g.march()
	check(g.phase=="lost" and not g.is_running,"Invasion is an immediate loss")
	g._physics_process(5.1)
	check(g.phase=="attract","Game over returns to attract")
	var definition = load("res://data/games/space_invaders.tres")
	check(definition.game_id==&"space_invaders" and definition.scene!=null,"Game resource")
	var database = load("res://data/project_database.tres")
	check(database.get_game(&"space_invaders")!=null,"Database registration")
	print("Space Invaders checks: ",failures," failures")
	g.free()
	quit(failures)