<?php

namespace DeliciousBrains\WPMDB\Pro\Transfers\Files;

interface SizeControllerInterface {
	/**
	 * Initializes the controller values.
	 *
	 * @param int $max
	 * @param int $fallback
	 * @param int $initialSize
	 * @param int $retryCount
	 *
	 * @return void
	 */
	public function initialize( $max, $fallback, $initialSize = null, $retryCount = 5 );

	/**
	 * Steps up the payload size to the next value.
	 *
	 * @return int
	 */
	public function step_up_size();

	/**
	 * Steps down the payload size to the previous value.
	 *
	 * @return int
	 */
	public function step_down_size( $steps = 1 );

	/**
	 * Returns the current payload size in bytes.
	 *
	 * @return int
	 */
	public function get_current_size();

	/**
	 * Returns the fallback size in bytes.
	 *
	 * @return int
	 */
	public function get_fallback_size();

	/**
	 * Returns true when the current payload size is at the max calculated size.
	 *
	 * @return boolean
	 */
	public function is_at_max_size();
}