<?php
namespace Strikewise\Calculator;

defined( 'ABSPATH' ) || exit;

/**
 * Result of a reference price calculation.
 */
final class Reference {

	/** The product is not reduced; nothing has to be shown (reduction mode). */
	const STATUS_NOT_REDUCED = 'not_reduced';

	/** A reference price was found. */
	const STATUS_OK = 'ok';

	/** Reduced, but no price is known from before the reduction started. */
	const STATUS_NO_HISTORY = 'no_history';

	/** Nothing recorded for this product yet. */
	const STATUS_NO_DATA = 'no_data';

	/** @var string */
	public $status;

	/** @var float|null Lowest price in the window, incl. VAT. */
	public $price;

	/** @var int|null Start of the reduction phase (UTC timestamp). */
	public $t0;

	/** @var bool False if the recorded history does not reach back to the window start. */
	public $complete;

	public function __construct( string $status, ?float $price = null, ?int $t0 = null, bool $complete = false ) {
		$this->status   = $status;
		$this->price    = $price;
		$this->t0       = $t0;
		$this->complete = $complete;
	}

	public function has_price(): bool {
		return self::STATUS_OK === $this->status && null !== $this->price;
	}
}