extends Node2D

class_name ShipEngine

@export var MaxSpeed : float = 200				#максимальная скорость без турбо режима
@export var MaxTurboSpeed : float = 300			#максимальная скорость в турбо режиме
@export var SpeedAcceleration : float = 50		#ускорение
@export var TurboFuelConsumption : float = 100	#потребление топлива в турбо режиме за секунду
@export var RotationSpeed : int = 90			#максимальная скорость поворота

@onready var Ship = get_parent()

var Speed = 0								#текущая скорость
var MinSpeed = MaxSpeed / -4				#минимальная скорость
var TurboEnabled = false
var AlternativeMovement = false
var DestinationAngle : float
var DestinationDifference : float

@onready var Hull = $"../Hull"

func _physics_process(delta):
	
	
	if DestinationAngle - Ship.rotation_degrees == clamp(DestinationAngle - Ship.rotation_degrees, -180, 180):
		DestinationDifference = DestinationAngle - Ship.rotation_degrees
	else:
		DestinationDifference = Ship.rotation_degrees - DestinationAngle
	if DestinationDifference != clamp(DestinationDifference, -1, 1):
		Ship.rotation_degrees += sign(DestinationDifference) * RotationSpeed * delta
	else:
		Ship.rotation_degrees = DestinationAngle
	if !AlternativeMovement:
		if Ship is MainShip: DestinationAngle = rad_to_deg(Ship.global_position.angle_to_point(get_global_mouse_position()))
	else:
		var RotationInput = Input.get_axis("rotateleft","rotateright")
		DestinationAngle += RotationInput * RotationSpeed * delta
		if DestinationAngle > 180: DestinationAngle = -180
		if DestinationAngle < -180: DestinationAngle = 180
		if Vector2.ZERO.distance_to(global_position) >= 5800: DestinationAngle = rad_to_deg(global_position.angle_to_point(Vector2.ZERO))
	
	TurboEnabled = clamp(Input.get_action_raw_strength("turbo") * Hull.Fuel, 0, 1) if Ship is MainShip else (Ship.State == "runaway" and Hull.Fuel > 0)
	var AccelerationInput = Input.get_axis("deccelerate", "accelerate") if Ship is MainShip else 1.0
	if !TurboEnabled:
		Speed = clamp(Speed + AccelerationInput * SpeedAcceleration * delta, MinSpeed, max(MaxSpeed, Speed))
		if Speed > MaxSpeed:
			Speed -= SpeedAcceleration * delta if AccelerationInput != -1 else 0
	else:
		if Hull.Fuel > 0:
			Speed = clamp(Speed + SpeedAcceleration * delta, MinSpeed, MaxTurboSpeed)
			if Speed > MaxSpeed:
				Hull.Fuel -= TurboFuelConsumption * delta
				if Hull.Fuel < 0:
					Hull.Fuel = 0
	
	Ship.velocity = Vector2.from_angle(Ship.rotation) * Speed
	Ship.move_and_slide()
	
	if Input.is_action_just_released("alternatemovement") and Ship is MainShip:
		AlternativeMovement = !AlternativeMovement