<?php

declare(strict_types=1);

/**
* @author Amasty Team
* @copyright Copyright (c) 2022 Amasty (https://www.amasty.com)
* @package One Step Checkout Delivery Date for Magento 2 (System)
*/

namespace Amasty\CheckoutDeliveryDate\Model;

use Amasty\Base\Model\ConfigProviderAbstract;
use Magento\Store\Model\ScopeInterface;

class ConfigProvider extends ConfigProviderAbstract
{
/**
* Path Prefix For Config
*/
public const PATH_PREFIX = 'amasty_checkout/';

public const DELIVERY_DATE_BLOCK = 'delivery_date/';

public const DD_ENABLED = 'enabled';
public const DD_REQUIRED = 'date_required';
public const AVAILABLE_DAYS = 'available_days';
public const AVAILABLE_HOURS = 'available_hours';
public const COMMENT_ENABLED = 'delivery_comment_enable';
public const COMMENT_DEFAULT = 'delivery_comment_default';

public const XPATH_FIRST_DAY = 'general/locale/firstday';

/**
* xpath prefix of module (section)
*
* @var string
*/
protected $pathPrefix = self::PATH_PREFIX;

/**
* @param int|null $storeId
* @return bool
*/
public function isDeliveryDateEnabled(int $storeId = null): bool
{
return $this->isSetFlag(self::DELIVERY_DATE_BLOCK . self::DD_ENABLED, $storeId);
}

/**
* @param int|null $storeId
* @return bool
*/
public function isDeliveryDateRequired(int $storeId = null): bool
{
return $this->isSetFlag(self::DELIVERY_DATE_BLOCK . self::DD_REQUIRED, $storeId);
}

/**
* @param int|null $storeId
* @return array
*/
public function getDeliveryDays(int $storeId = null): array
{
$days = $this->getValue(self::DELIVERY_DATE_BLOCK . self::AVAILABLE_DAYS, $storeId);
if (!$days) {
return [];
}

$days = explode(',', $days);
foreach ($days as &$day) {
$day = (int)$day;
}

return $days;
}

/**
* @param int|null $storeId
* @return bool
*/
public function isCommentEnabled(int $storeId = null): bool
{
return $this->isSetFlag(self::DELIVERY_DATE_BLOCK . self::COMMENT_ENABLED, $storeId);
}

/**
* @param int|null $storeId
* @return string
*/
public function getDefaultComment(int $storeId = null): string
{
return (string)$this->getValue(self::DELIVERY_DATE_BLOCK . self::COMMENT_DEFAULT, $storeId);
}

/**
* @param int|null $storeId
* @return int
*/
public function getFirstDay(int $storeId = null): int
{
return (int)$this->scopeConfig->getValue(self::XPATH_FIRST_DAY, ScopeInterface::SCOPE_STORE, $storeId);
}

/**
* @param int|null $storeId
* @return array
*/
public function getDeliveryHours(int $storeId = null): array
{
$hoursSetting = (string)$this->getValue(self::DELIVERY_DATE_BLOCK . self::AVAILABLE_HOURS, $storeId);
$intervals = preg_split('#\s*,\s*#', $hoursSetting, -1, PREG_SPLIT_NO_EMPTY);

$hours = $this->getHours($intervals);
if (!$hours) {
$hours = range(0, 23);
} else {
$hours = array_unique($hours);
asort($hours);
}

$options = [[
'value' => '-1',
'label' => ' ',
]];

foreach ($hours as $hour) {
$options [] = [
'value' => $hour,
'label' => $hour . ':00 - ' . (($hour) + 1) . ':00',
];
}

return $options;
}

/**
* @param array $intervals
* @return array
*/
private function getHours(array $intervals): array
{
$hours = [];
foreach ($intervals as $interval) {
if (preg_match('#(?P<lower>\d+)(\s*-\s*(?P<upper>\d+))?#', $interval, $matches)) {
$lower = (int)$matches['lower'];
if ($lower > 23) {
continue;
}

if (isset($matches['upper'])) {
$upper = (int)$matches['upper'];
if ($upper > 24) {
continue;
}

$upper--;

if ($lower > $upper) {
continue;
}
} else {
$upper = $lower;
}

$range = range($lower, $upper);
$hours = $this->mergeHours($hours, $range);
}
}

return $hours;
}

/**
* @param array $hours
* @param array $range
* @return array
*/
private function mergeHours(array $hours, array $range): array
{
return array_merge($hours, $range);
}
}