<?php
/************************************************************************
 * This file is part of EspoCRM.
 *
 * EspoCRM - Open Source CRM application.
 * Copyright (C) 2014-2023 Yurii Kuznietsov, Taras Machyshyn, Oleksii Avramenko
 * Website: https://www.espocrm.com
 *
 * EspoCRM is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * EspoCRM 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with EspoCRM. If not, see http://www.gnu.org/licenses/.
 *
 * The interactive user interfaces in modified source and object code versions
 * of this program must display Appropriate Legal Notices, as required under
 * Section 5 of the GNU General Public License version 3.
 *
 * In accordance with Section 7(b) of the GNU General Public License version 3,
 * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
 ************************************************************************/

namespace Espo\Tools\Currency;

use Espo\Core\Acl\Table;
use Espo\Core\Currency\ConfigDataProvider;
use Espo\Core\Currency\Rates;
use Espo\Core\Exceptions\BadRequest;
use Espo\Core\Exceptions\Forbidden;
use Espo\Core\Acl;
use Espo\Core\Utils\Config\ConfigWriter;
use Espo\Core\Utils\Currency\DatabasePopulator;

class RateService
{
    private const SCOPE = 'Currency';

    public function __construct(
        private ConfigWriter $configWriter,
        private Acl $acl,
        private DatabasePopulator $databasePopulator,
        private ConfigDataProvider $configDataProvider
    ) {}

    /**
     * @throws Forbidden
     */
    public function get(): Rates
    {
        if (!$this->acl->check(self::SCOPE)) {
            throw new Forbidden();
        }

        if ($this->acl->getLevel(self::SCOPE, Table::ACTION_READ) !== Table::LEVEL_YES) {
            throw new Forbidden();
        }

        $rates = Rates::create($this->configDataProvider->getBaseCurrency());

        foreach ($this->configDataProvider->getCurrencyList() as $code) {
            $rates = $rates->withRate($code, $this->configDataProvider->getCurrencyRate($code));
        }

        return $rates;
    }

    /**
     * @throws BadRequest
     * @throws Forbidden
     */
    public function set(Rates $rates): void
    {
        if (!$this->acl->check(self::SCOPE)) {
            throw new Forbidden();
        }

        if ($this->acl->getLevel(self::SCOPE, Table::ACTION_EDIT) !== Table::LEVEL_YES) {
            throw new Forbidden();
        }

        $currencyList = $this->configDataProvider->getCurrencyList();
        $baseCurrency = $this->configDataProvider->getBaseCurrency();

        $set = [];

        foreach ($rates->toAssoc() as $key => $value) {
            if ($value < 0) {
                throw new BadRequest("Bad value.");
            }

            if (!in_array($key, $currencyList)) {
                continue;
            }

            if ($key === $baseCurrency) {
                continue;
            }

            $set[$key] = $value;
        }

        foreach ($currencyList as $currency) {
            if ($currency === $baseCurrency) {
                continue;
            }

            $set[$currency] ??= $this->configDataProvider->getCurrencyRate($currency);
        }

        $this->configWriter->set('currencyRates', $set);
        $this->configWriter->save();

        $this->databasePopulator->process();
    }
}