<?php

namespace Hosterra\FluxBuilder\Functions;

use Hosterra\FluxBuilder\Type;
use Hosterra\FluxBuilder\Type\ArrayType;
use Hosterra\FluxBuilder\Type\CustomType;
use Hosterra\FluxBuilder\Type\DurationType;
use Hosterra\FluxBuilder\Type\FnType;

class AggregateWindow extends Base {
	/**
	 * @var string $every
	 */
	private $every;

	/**
	 * @var string $fn
	 */
	private $fn;

	/**
	 * @var array $options
	 */
	private $options;

	public function __construct( $every, $fn, array $options = [] ) {
		$this->every   = $every;
		$this->fn      = $fn;
		$this->options = $options;
	}

	public function __toString() {
		$input = new ArrayType( array_filter( [
			'every'       => new DurationType( $this->every ),
			'period'      => isset( $this->options['period'] ) ? new DurationType( $this->options['period'] ) : null,
			'offset'      => isset( $this->options['offset'] ) ? new DurationType( $this->options['offset'] ) : null,
			'fn'          => new CustomType( $this->fn ),
			'location'    => isset( $this->options['location'] ) ? new Type( $this->options['location'] ) : null,
			'column'      => isset( $this->options['column'] ) ? new Type( $this->options['column'] ) : null,
			'timeSrc'     => isset( $this->options['timeSrc'] ) ? new Type( $this->options['timeSrc'] ) : null,
			'timeDst'     => isset( $this->options['timeDst'] ) ? new Type( $this->options['timeDst'] ) : null,
			'createEmpty' => isset( $this->options['createEmpty'] ) && ! $this->options['createEmpty'] ?
				new Type( $this->options['createEmpty'] ) : null,
		] ) );

		return '|> aggregateWindow(' . $input . ') ';
	}
}