<?php

/**
 * FixRecurringTransactions.php
 * Copyright (c) 2020 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\Console\Commands\Correction;

use FireflyIII\Console\Commands\ShowsFriendlyMessages;
use FireflyIII\Models\Recurrence;
use FireflyIII\Models\RecurrenceTransaction;
use FireflyIII\Models\TransactionType;
use FireflyIII\Repositories\Recurring\RecurringRepositoryInterface;
use FireflyIII\Repositories\User\UserRepositoryInterface;
use FireflyIII\User;
use Illuminate\Console\Command;

class CorrectsRecurringTransactions extends Command
{
    use ShowsFriendlyMessages;

    protected $description = 'Fixes recurring transactions with the wrong transaction type.';
    protected $signature   = 'correction:recurring-transactions';
    private int $count     = 0;
    private RecurringRepositoryInterface $recurringRepos;
    private UserRepositoryInterface $userRepos;

    /**
     * Execute the console command.
     */
    public function handle(): int
    {
        $this->stupidLaravel();
        $this->correctTransactions();

        return 0;
    }

    private function correctTransactions(): void
    {
        $users = $this->userRepos->all();

        /** @var User $user */
        foreach ($users as $user) {
            $this->processUser($user);
        }
    }

    private function processRecurrence(Recurrence $recurrence): void
    {
        /** @var RecurrenceTransaction $transaction */
        foreach ($recurrence->recurrenceTransactions as $transaction) {
            $this->processTransaction($recurrence, $transaction);
        }
    }

    private function processTransaction(Recurrence $recurrence, RecurrenceTransaction $transaction): void
    {
        $source      = $transaction->sourceAccount;
        $destination = $transaction->destinationAccount;
        $type        = $recurrence->transactionType;
        $link        = config(sprintf('firefly.account_to_transaction.%s.%s', $source->accountType->type, $destination->accountType->type));
        if (null !== $link && strtolower((string) $type->type) !== strtolower($link)) {
            $this->friendlyWarning(sprintf(
                'Recurring transaction #%d should be a "%s" but is a "%s" and will be corrected.',
                $recurrence->id,
                $link,
                $type->type
            ));
            $transactionType = TransactionType::whereType($link)->first();
            if (null !== $transactionType) {
                $recurrence->transaction_type_id = $transactionType->id;
                $recurrence->save();
                ++$this->count;
            }
        }
    }

    private function processUser(User $user): void
    {
        $this->recurringRepos->setUser($user);
        $recurrences = $this->recurringRepos->get();

        /** @var Recurrence $recurrence */
        foreach ($recurrences as $recurrence) {
            $this->processRecurrence($recurrence);
        }
    }

    /**
     * Laravel will execute ALL __construct() methods for ALL commands whenever a SINGLE command is
     * executed. This leads to noticeable slow-downs and class calls. To prevent this, this method should
     * be called from the handle method instead of using the constructor to initialize the command.
     */
    private function stupidLaravel(): void
    {
        $this->recurringRepos = app(RecurringRepositoryInterface::class);
        $this->userRepos      = app(UserRepositoryInterface::class);
    }
}
