<?php

/*
 * PiggyBankObserver.php
 * Copyright (c) 2023 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\Handlers\Observer;

use FireflyIII\Models\Attachment;
use FireflyIII\Models\PiggyBank;
use FireflyIII\Repositories\Attachment\AttachmentRepositoryInterface;
use FireflyIII\Support\Http\Api\ExchangeRateConverter;
use Illuminate\Support\Facades\Log;

/**
 * Class PiggyBankObserver
 */
class PiggyBankObserver
{
    public function created(PiggyBank $piggyBank): void
    {
        Log::debug('Observe "created" of a piggy bank.');
        $this->updatePrimaryCurrencyAmount($piggyBank);
    }

    private function updatePrimaryCurrencyAmount(PiggyBank $piggyBank): void
    {
        $group                           = $piggyBank->accounts()->first()?->user->userGroup;
        if (null === $group) {
            Log::debug(sprintf('No account(s) yet for piggy bank #%d.', $piggyBank->id));

            return;
        }
        $userCurrency                    = app('amount')->getPrimaryCurrencyByUserGroup($group);
        $piggyBank->native_target_amount = null;
        if ($piggyBank->transactionCurrency->id !== $userCurrency->id) {
            $converter                       = new ExchangeRateConverter();
            $converter->setIgnoreSettings(true);
            $converter->setUserGroup($group);
            $piggyBank->native_target_amount = $converter->convert($piggyBank->transactionCurrency, $userCurrency, today(), $piggyBank->target_amount);
        }
        $piggyBank->saveQuietly();
        Log::debug('Piggy bank primary currency target amount is updated.');
    }

    /**
     * Also delete related objects.
     */
    public function deleting(PiggyBank $piggyBank): void
    {
        app('log')->debug('Observe "deleting" of a piggy bank.');

        $repository = app(AttachmentRepositoryInterface::class);
        $repository->setUser($piggyBank->accounts()->first()->user);

        /** @var Attachment $attachment */
        foreach ($piggyBank->attachments()->get() as $attachment) {
            $repository->destroy($attachment);
        }

        $piggyBank->piggyBankEvents()->delete();
        $piggyBank->piggyBankRepetitions()->delete();

        $piggyBank->notes()->delete();
    }

    public function updated(PiggyBank $piggyBank): void
    {
        Log::debug('Observe "updated" of a piggy bank.');
        $this->updatePrimaryCurrencyAmount($piggyBank);
    }
}
