extends Node2D

const DEFINITION := preload("res://resources/items/external_turret.tres")
const MACHINE_GUN := preload("res://resources/items/machine_gun.tres")
const GENERATOR := preload("res://scripts/items/item_generator.gd")
const LAB := preload("res://scripts/planets/laboratory.gd")
const PROJECTILE := preload("res://scripts/game/weapon_projectile.gd")

func _ready() -> void:
	GameState.start_new_run()
	GameState.captain.level = 30
	assert(DEFINITION not in GENERATOR.available_definitions())
	var progress: Resource = GameState.captain.expedition
	progress.freighter_rooms.expansion_1 = "laboratory"
	progress.laboratory_offers.assign(["external_turret"])
	for key in LAB.COSTS.external_turret: GameState.captain.minerals[key] = 100
	assert(LAB.start(GameState.captain,"external_turret"))
	LAB.advance(progress,LAB.DURATION)
	assert(DEFINITION in GENERATOR.available_definitions())
	for level in [1,5,30,120,1000]:
		var turret_item := ItemInstance.new()
		turret_item.definition = DEFINITION
		var machine_item := ItemInstance.new()
		machine_item.definition = MACHINE_GUN
		seed(327+level)
		GENERATOR.roll_base_values(turret_item,level)
		seed(327+level)
		GENERATOR.roll_base_values(machine_item,level)
		assert(turret_item.get_damage_range().is_equal_approx(machine_item.get_damage_range()*0.5))
		for value in 20:
			seed(value)
			var turret_damage := turret_item.roll_damage()
			seed(value)
			assert(is_equal_approx(turret_damage,machine_item.roll_damage()*0.5))
	var ship := preload("res://scenes/game/player_ship.tscn").instantiate()
	add_child(ship)
	ship.set_physics_process(false)
	ship.get_node("WeaponController").set_physics_process(false)
	ship.get_node("ExtensionSystems").set_physics_process(false)
	var controller: Node = ship.get_node("WeaponController")
	var inventory: ShipInventory = ship.get_node("ShipInventory")
	var item := ItemInstance.new()
	item.definition = DEFINITION
	item.damage_min = 8.0
	item.damage_max = 12.0
	inventory.weapon_slots[0] = item
	GameState.captain.skills.efficient_magazine = 3
	GameState.captain.skills.drone_commander = 3
	inventory.ammunition = 49
	assert(not controller.try_deploy_turret(0))
	assert(inventory.ammunition == 49 and get_tree().get_nodes_in_group("player_external_turrets").is_empty())
	inventory.ammunition = 100
	assert(controller.try_deploy_turret(0))
	assert(inventory.ammunition == 50)
	assert(not controller.try_deploy_turret(0),"Deployment cooldown prevents repeated clicks")
	var turret: Node2D = get_tree().get_nodes_in_group("player_external_turrets")[0]
	turret.set_physics_process(false)
	assert(turret.ammunition == 50)
	var anchor := turret.global_position
	ship.position += Vector2(1000,1000)
	turret._physics_process(0.1)
	assert(turret.global_position == anchor and turret.ammunition == 50,"Stays in space and holds ammo without targets")
	ship.position = Vector2.ZERO
	var enemy := preload("res://scenes/game/enemy_ship.tscn").instantiate()
	enemy.position = anchor+Vector2(250,0)
	add_child(enemy)
	enemy.set_physics_process(false)
	enemy.hull = 10000.0
	enemy.max_hull = 10000.0
	enemy.shields = 0.0
	enemy.absorption = Vector3.ZERO
	enemy._player = ship
	await get_tree().physics_frame
	await get_tree().process_frame
	assert(turret._find_target() == enemy)
	var base_ammo := inventory.ammunition
	# The turret retains its own item even if the weapon is modified or unequipped.
	item.damage_min = 100.0
	item.damage_max = 100.0
	inventory.weapon_slots[0] = null
	var shots := 0
	for index in 50:
		turret._fire(enemy)
		for child in get_children():
			if child.get_script() == PROJECTILE:
				shots += 1
				assert(child.damage >= 4.0 and child.damage <= 6.0)
				assert(child.weapon_kind == ItemDefinition.WeaponKind.MACHINE_GUN)
				assert(child.source_ship == ship)
				if index == 0:
					var hull_before: float = enemy.hull
					child._hit_target(enemy)
					assert(enemy.hull < hull_before,"Turret bullets really damage enemies")
				child.free()
	assert(shots == 50 and turret.ammunition == 0)
	assert(turret.is_queued_for_deletion())
	assert(inventory.ammunition == base_ammo,"Only prepaid ammunition is used")
	turret._fire(enemy)
	assert(turret.ammunition == 0,"Never shoots a 51st bullet")
	await get_tree().process_frame
	inventory.weapon_slots[0] = item
	controller._shot_timers[0] = 0.0
	ship.is_docked = true
	assert(not controller.try_deploy_turret(0) and inventory.ammunition == base_ammo)
	ship.is_docked = false
	controller._fire_buttons_down[0] = true
	controller._fire_just_pressed[0] = true
	controller._physics_process(0.01)
	assert(inventory.ammunition == 0)
	var second: Node2D = get_tree().get_nodes_in_group("player_external_turrets")[0]
	second.set_physics_process(false)
	inventory.ammunition = 50
	controller._physics_process(2.0)
	assert(inventory.ammunition == 50 and get_tree().get_nodes_in_group("player_external_turrets").size() == 1,"Holding the mouse does not deploy more turrets")
	ship.is_docked = true
	second._physics_process(0.1)
	assert(second.is_queued_for_deletion(),"Docking clears deployed turrets")
	await get_tree().create_timer(0.5).timeout
	print("EXTERNAL_TURRET_TEST: PASS (laboratory unlock, exact half machine-gun damage at five levels, 50 prepaid ammo despite ammo skill, placement/cooldown/docking, fixed position, target acquisition, 50 real bullets and damage, snapshot, exhaustion cleanup)")
	get_tree().quit()