<?php

/*
 * This file is part of the Syspad Authentication project.
 * Copyright (C) Compos Juliot
 */

namespace App\Application\Services\Page;

use App\Application\Adapter\FolioInterface;
use App\Domain\Entity\Cdf;
use App\Domain\Entity\PageOptions;

/**
 * [Used to managed page's folio].
 */
class FolioService implements FolioInterface
{
    /**
     * @param array $uniqueOrderedCdfPages [New page's id order]
     * @param array $pages [Current cdf's page's order]
     *
     * @return array [Pages to update]
     */
    public function updateCdfFolios(array $uniqueOrderedCdfPages, array $pages): array
    {
        $folio = 1;
        $pagesToSave = [];

        foreach ($uniqueOrderedCdfPages as $idPage) {
            $page = $pages[$idPage];

            if (null === $page->getDeletedAt() && false == $page->getOption()->getCover()) {
                if ($page->getFolio() !== $folio) {
                    $page->setFolio($folio);
                    $pagesToSave[] = $page;
                }

                $folio += $page->getOption()->getNbPages();
            } else {
                continue;
            }
        }

        return $pagesToSave;
    }

    /**
     * @param PageOptions $pageOptions
     * @param Cdf $cdf
     * @param bool $onDelete [Delete case]
     *
     * @return array [Pages to update]
     */
    public function updateFolios(PageOptions $pageOptions, Cdf $cdf, bool $onDelete = false): array
    {
        $optionFolio = $pageOptions->getPages()->first()->getFolio();
        $optionNbPage = (int) $pageOptions->getNbPages();

        $startFolio = $onDelete ? $optionFolio : $optionFolio + $optionNbPage;
        $cdfPages = $cdf->getCdfPage()->filter(function ($page) use ($optionFolio) {
            return $page->getFolio() > $optionFolio && !$page->getOption()->getCover();
        })->toArray();

        uasort($cdfPages, function($a, $b) {
            return ($a->getFolio() < $b->getFolio()) ? -1 : 1;
        });

        $pagesToSave = $this->updateCdfFoliosOnStartFolio($startFolio, $cdfPages);

        return $pagesToSave;
    }

    /**
     * @param int $startFolio [Folio to start update]
     * @param array $cdfPages [Cdf's page's order]
     *
     * @return array [Pages to update]
     */
    private function updateCdfFoliosOnStartFolio(int $startFolio, array $cdfPages): array
    {
        $folio = $startFolio;
        $pagesToSave = [];

        foreach ($cdfPages as $page) {
            if (null === $page->getDeletedAt()) {
                $page->setFolio($folio);
                $pagesToSave[] = $page;

                $folio += $page->getOption()->getNbPages();
            } else {
                continue;
            }
        }

        return $pagesToSave;
    }
}