<?php

use Components\Capacitor;
use Components\Inductor;
use Scientific\CrossoverSlope;
use Scientific\Frequency;

class FirstOrderTwoWayCrossover
{
    private const PI = 3.1415926535;
    private const TWO_PI = 2. * self::PI;

    public function __construct(
        private Frequency $frequency
    )
    {
    }

    public function getFrequency(): Frequency
    {
        return clone $this->frequency;
    }

    public function getSlope(): CrossoverSlope
    {
        return CrossoverSlope::fromDecibelPerOctave(6.);
    }

    public function getTweeterCapacitor(Driver $driver): Capacitor
    {
        $f = $this->getFrequency()->getValue()->unit();
        $z = $driver->getImpedance()->getValue()->unit();

        return new Capacitor(1. / (self::TWO_PI * $f * $z));
    }

    public function getWooferInductor(Driver $driver): Inductor
    {
        $f = $this->getFrequency()->getValue()->unit();
        $z = $driver->getImpedance()->getValue()->unit();

        return new Inductor($z / (self::TWO_PI * $f));
    }
}