<?php
declare(strict_types=1);

namespace Esun\Cart\Model;

use Magento\Customer\Model\Context as CustomerContext;
use Magento\Framework\App\Config\ScopeConfigInterface;
use Magento\Framework\App\Http\Context as HttpContext;
use Magento\Store\Model\ScopeInterface;

class TestModeConfig
{
    private const XML_PATH_ENABLED = 'esun_cart/test_mode/enabled';
    private const XML_PATH_ALLOWED_CUSTOMER_GROUPS = 'esun_cart/test_mode/allowed_customer_groups';
    private const XML_PATH_POPUP_TITLE = 'esun_cart/test_mode/popup_title';
    private const XML_PATH_POPUP_MESSAGE = 'esun_cart/test_mode/popup_message';
    private const DEFAULT_POPUP_TITLE = 'Test Mode';
    private const DEFAULT_POPUP_MESSAGE =
        'Our website is currently in beta testing. Purchases are not available at this time.';

    public function __construct(
        private readonly ScopeConfigInterface $scopeConfig,
        private readonly HttpContext $httpContext
    ) {
    }

    public function isEnabled(): bool
    {
        return $this->scopeConfig->isSetFlag(self::XML_PATH_ENABLED, ScopeInterface::SCOPE_STORE);
    }

    /** @return int[] */
    public function getAllowedCustomerGroupIds(): array
    {
        $value = (string)$this->scopeConfig->getValue(
            self::XML_PATH_ALLOWED_CUSTOMER_GROUPS,
            ScopeInterface::SCOPE_STORE
        );

        if ($value === '') {
            return [];
        }

        return array_values(array_unique(array_map('intval', array_filter(explode(',', $value), 'strlen'))));
    }

    public function isCurrentCustomerAllowed(): bool
    {
        $customerGroupId = (int)$this->httpContext->getValue(CustomerContext::CONTEXT_GROUP);

        return in_array($customerGroupId, $this->getAllowedCustomerGroupIds(), true);
    }

    public function isRestricted(): bool
    {
        return $this->isEnabled() && !$this->isCurrentCustomerAllowed();
    }

    public function getPopupTitle(): string
    {
        return $this->getTextValue(self::XML_PATH_POPUP_TITLE, self::DEFAULT_POPUP_TITLE);
    }

    public function getPopupMessage(): string
    {
        return $this->getTextValue(self::XML_PATH_POPUP_MESSAGE, self::DEFAULT_POPUP_MESSAGE);
    }

    private function getTextValue(string $path, string $default): string
    {
        $value = trim((string)$this->scopeConfig->getValue($path, ScopeInterface::SCOPE_STORE));

        return $value !== '' ? $value : $default;
    }
}