<?php

/**
 * IndexController.php
 * Copyright (c) 2019 james@firefly-iii.org
 *
 * This file is part of Firefly III (https://github.com/firefly-iii).
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */
declare(strict_types=1);

namespace FireflyIII\Http\Controllers\Recurring;

use Carbon\Carbon;
use FireflyIII\Exceptions\FireflyException;
use FireflyIII\Http\Controllers\Controller;
use FireflyIII\Models\Recurrence;
use FireflyIII\Repositories\Recurring\RecurringRepositoryInterface;
use FireflyIII\Support\Facades\Preferences;
use FireflyIII\Support\Http\Controllers\GetConfigurationData;
use FireflyIII\Support\JsonApi\Enrichments\RecurringEnrichment;
use FireflyIII\Transformers\RecurrenceTransformer;
use FireflyIII\User;
use Illuminate\Contracts\View\Factory;
use Illuminate\Http\Request;
use Illuminate\Pagination\LengthAwarePaginator;
use Illuminate\View\View;
use Psr\Container\ContainerExceptionInterface;
use Psr\Container\NotFoundExceptionInterface;
use Symfony\Component\HttpFoundation\ParameterBag;

/**
 * Class IndexController
 */
final class IndexController extends Controller
{
    use GetConfigurationData;

    private RecurringRepositoryInterface $repository;

    /**
     * IndexController constructor.
     */
    public function __construct()
    {
        parent::__construct();

        // translations:
        $this->middleware(function ($request, $next) {
            app('view')->share('mainTitleIcon', 'bi-paint-bucket');
            app('view')->share('title', (string) trans('firefly.recurrences'));

            $this->repository = app(RecurringRepositoryInterface::class);

            return $next($request);
        });
    }

    /**
     * TODO the notes of a recurrence are pretty pointless at this moment.
     * Show all recurring transactions.
     *
     * @return Factory|View
     *
     * @throws FireflyException
     * @throws ContainerExceptionInterface
     * @throws NotFoundExceptionInterface
     */
    public function index(Request $request): Factory|\Illuminate\Contracts\View\View
    {
        $page        = 0 === (int) $request->input('page') ? 1 : (int) $request->input('page');
        $page        = min(max(1, $page), 2 ** 16);
        $pageSize    = (int) Preferences::get('listPageSize', 50)->data;
        $collection  = $this->repository->get();
        $today       = today(config('app.timezone'));
        $year        = today(config('app.timezone'));

        // split collection
        $total       = $collection->count();
        $recurrences = $collection->slice(($page - 1) * $pageSize, $pageSize);

        // enrich
        /** @var User $admin */
        $admin       = auth()->user();
        $enrichment  = new RecurringEnrichment();
        $enrichment->setUser($admin);
        $recurrences = $enrichment->enrich($recurrences);

        /** @var RecurrenceTransformer $transformer */
        $transformer = app(RecurrenceTransformer::class);
        $transformer->setParameters(new ParameterBag());

        $recurring   = [];

        /** @var Recurrence $recurrence */
        foreach ($recurrences as $recurrence) {
            $year->addYear();
            if ($recurrence->first_date > $today) {
                $today = clone $recurrence->first_date;
                $year  = clone $today;
                $year->addYear();
            }
            $array                 = $transformer->transform($recurrence);
            $array['first_date']   = new Carbon($array['first_date']);
            $array['repeat_until'] = null === $array['repeat_until'] ? null : new Carbon($array['repeat_until']);
            $array['latest_date']  = null === $array['latest_date'] ? null : new Carbon($array['latest_date']);
            // lazy but OK
            $array['attachments']  = $recurrence->attachments()->count();

            // make carbon objects out of occurrences
            foreach ($array['repetitions'] as $repIndex => $repetition) {
                foreach ($repetition['occurrences'] as $occIndex => $occurrence) {
                    $array['repetitions'][$repIndex]['occurrences'][$occIndex] = new Carbon($occurrence);
                }
            }

            $recurring[]           = $array;
        }
        $paginator   = new LengthAwarePaginator($recurring, $total, $pageSize, $page);
        $paginator->setPath(route('recurring.index'));
        $today       = today(config('app.timezone'));

        $this->verifyRecurringCronJob();

        return view('recurring.index', [
            'paginator' => $paginator,
            'today'     => $today,
            'page'      => $page,
            'pageSize'  => $pageSize,
            'total'     => $total,
        ]);
    }
}
