extends Node2D
const DATA := preload("res://scripts/planets/alien_research.gd")
const EFFECTS := preload("res://scripts/game/alien_weapon_effects.gd")
const ENEMY := preload("res://scenes/game/enemy_ship.tscn")
const PROJECTILE := preload("res://scenes/game/weapon_projectile.tscn")
var player: CharacterBody2D
var progress: Resource
var _enemy_index := 0

func enemy_at(position_value: Vector2) -> CharacterBody2D:
	var enemy := ENEMY.instantiate() as CharacterBody2D
	add_child(enemy)
	enemy.set_physics_process(false)
	enemy._player = player
	enemy.position = position_value
	enemy.absorption = Vector3.ZERO
	enemy.hull = 1000.0
	enemy.max_hull = 1000.0
	enemy.shields = 100.0
	enemy.max_shields = 100.0
	_enemy_index += 1
	return enemy

func reset_enemy(enemy: Node, shields := 100.0) -> void:
	enemy.hull = 1000.0
	enemy.shields = shields
	enemy._disabled_systems = [0.0,0.0,0.0]

func _ready() -> void:
	GameState.start_new_run()
	progress = GameState.captain.expedition
	progress.analysis_samples = 1000
	assert(not DATA.purchase(progress,"weapons_a"))
	assert(DATA.purchase(progress,"general") and DATA.cost("general")==10)
	assert(DATA.purchase(progress,"weapons") and DATA.cost("weapons")==15)
	for path in ["a","b"]:
		var id: String = "weapons_"+path
		for level in 4:
			assert(DATA.cost(id)==20+level*5)
			var before: int = progress.analysis_samples
			assert(DATA.purchase(progress,id))
			assert(progress.analysis_samples==before-DATA.cost(id))
			assert(not DATA.purchase(progress,id))
			id += "_next"
	assert(DATA.learned_count(progress)==10)
	assert(not DATA.purchase(progress,"hull_a"))
	progress.alien_skills = {"weapons_a":true}
	player = preload("res://scenes/game/player_ship.tscn").instantiate()
	add_child(player)
	player.set_physics_process(false)
	var weapons: Node = player.get_node("WeaponController")
	weapons.set_physics_process(false)
	var target := enemy_at(Vector2(1000,0))
	target.shields = 0.0
	weapons._apply_damage(target,10.0,false,0.0,DamageTypes.Type.ENERGY)
	assert(target.hull==985.0,"Weak point applies to lasers")
	reset_enemy(target,0.0)
	var shot := PROJECTILE.instantiate()
	shot.damage = 10.0
	shot._apply_damage_once(target)
	shot._apply_damage_once(target)
	assert(target.hull==985.0,"Projectiles get weak point once per impact")
	shot.free()
	progress.alien_skills.weapons_a_next = true
	for system in 3:
		assert(EFFECTS.roll_disabled_system(0.0099,system)==system)
	assert(EFFECTS.roll_disabled_system(0.01,0)==-1)
	reset_enemy(target)
	target.take_research_weapon_hit(10,false,DamageTypes.Type.ENERGY,0,2)
	assert(target.system_disabled(2) and target.shields==0.0)
	target.regenerate_defenses(1.0)
	assert(target.shields==0.0)
	target.tick_disabled_systems(3.1)
	assert(not target.system_disabled(2) and target.shields==85.0)
	target.disable_system(1)
	var count := get_child_count()
	target._fire_plasma(Vector2.RIGHT)
	assert(get_child_count()==count,"Disabled weapons cannot fire")
	target.disable_system(0)
	target.velocity = Vector2.ZERO
	target._activated = true
	target._physics_process(0.1)
	assert(target.velocity.is_zero_approx(),"Disabled engines cannot produce thrust")
	target.tick_disabled_systems(3.1)
	assert(not target.system_disabled(0) and not target.system_disabled(1))
	reset_enemy(target,0.0)
	target.take_research_dot(10,DamageTypes.Type.RADIATION,0)
	assert(target.hull==990.0 and not target.system_disabled(0) and not target.system_disabled(1) and not target.system_disabled(2),"DoT does not reroll shot technologies")
	progress.alien_skills = {"weapons_a":true,"weapons_a_next_next":true}
	var first := enemy_at(Vector2.ZERO)
	var second := enemy_at(Vector2(60,0))
	var third := enemy_at(Vector2(120,0))
	first.shields = 0.0
	second.shields = 0.0
	third.shields = 0.0
	weapons._apply_damage(first,10.0)
	assert(first.hull==985.0 and second.hull==985.0 and third.hull==1000.0,"Splash extends 10px beyond hulls without chaining")
	reset_enemy(first,0.0)
	reset_enemy(second,0.0)
	shot = PROJECTILE.instantiate()
	shot.damage = 10.0
	shot._apply_damage_once(first)
	shot._apply_damage_once(second)
	assert(first.hull==985.0 and second.hull==985.0,"Area hits cannot deal duplicate damage")
	shot.free()
	progress.alien_skills = {"weapons_a":true,"weapons_a_next_next_next":true}
	reset_enemy(target)
	target.take_research_weapon_hit(10,false,DamageTypes.Type.ENERGY,0.5,-1)
	assert(target.hull==985.0 and target.shields==85.0,"Perfect shot deals full damage to both layers without double piercing")
	reset_enemy(target)
	target.absorption = Vector3(0,50,0)
	target.take_research_weapon_hit(10,false,DamageTypes.Type.ENERGY,0,-1)
	assert(target.hull==992.5 and target.shields==92.5,"Absorption still applies")
	progress.alien_skills = {"weapons_b":true}
	assert(is_equal_approx(player.get_evasion_chance(),0.05))
	progress.alien_skills = {"weapons_b_next":true}
	player.position = Vector2(500,500)
	shot = PROJECTILE.instantiate()
	shot.enemy_shot = true
	shot.weapon_kind = ItemDefinition.WeaponKind.MISSILE
	shot.damage = 100.0
	add_child(shot)
	shot.position = player.position
	shot.set_physics_process(false)
	var shields: float = player.shields
	var hull: float = player.hull
	assert(shot.try_intercept(player,0.24999))
	shot._hit_target(player)
	shot._explode_at_target(player)
	shot._apply_damage_once(player)
	assert(player.shields==shields and player.hull==hull,"Intercepted missile cannot hurt player or splash targets")
	var failed := PROJECTILE.instantiate()
	failed.enemy_shot = true
	failed.weapon_kind = ItemDefinition.WeaponKind.MISSILE
	add_child(failed)
	failed.set_physics_process(false)
	failed.position = player.position
	assert(not failed.try_intercept(player,0.25))
	assert(not failed.try_intercept(player,0.0),"One interception roll per missile")
	failed.free()
	progress.alien_skills = {"weapons_b_next_next":true}
	assert(not target.research_aim_direction(Vector2.RIGHT,0.249,1).is_equal_approx(Vector2.RIGHT))
	assert(target.research_aim_direction(Vector2.RIGHT,0.25,1).is_equal_approx(Vector2.RIGHT))
	progress.alien_skills = {"weapons_b_next_next_next":true}
	target.absorption = Vector3.ZERO
	target.weapon_kind = ItemDefinition.WeaponKind.PLASMA
	target._fire_plasma(Vector2.RIGHT)
	var friendly: Node
	for child in get_children():
		if child.get_script()==preload("res://scripts/game/weapon_projectile.gd") and child.source_ship==target: friendly=child
	assert(friendly!=null and (friendly.collision_mask&4)!=0)
	reset_enemy(second,0.0)
	var source_hull: float = target.hull
	friendly._apply_damage_once(target)
	assert(target.hull==source_hull,"Friendly fire excludes the shooter")
	friendly._apply_damage_once(second)
	assert(second.hull<1000.0,"Hostile projectiles can damage other aliens")
	print("ALIEN_WEAPON_TECHNOLOGIES_TEST: PASS (costs, prerequisites, all 8 effects, roll boundaries, no DoT rerolls, no splash chains, harmless interception, friendly fire)")