<?php

declare(strict_types=1);

namespace Evomedien\FeComment\Service;

use TYPO3\CMS\Core\Configuration\ExtensionConfiguration;
use TYPO3\CMS\Core\Utility\GeneralUtility;

/**
 * Typed access to the extension configuration (Settings > Extension
 * Configuration > fe_comment). Every accessor is failure-tolerant: an
 * unconfigured extension behaves like "everything empty, headless mode".
 */
final class ExtensionSettings
{
    /** @var array<string,mixed> */
    private array $settings;

    public function __construct()
    {
        try {
            $this->settings = (array)GeneralUtility::makeInstance(ExtensionConfiguration::class)->get('fe_comment');
        } catch (\Throwable) {
            $this->settings = [];
        }
    }

    /** @return string[] */
    public function mailTo(): array
    {
        return $this->addressList('mailTo');
    }

    /** @return string[] */
    public function mailCc(): array
    {
        return $this->addressList('mailCc');
    }

    /** @return string[] */
    public function mailBcc(): array
    {
        return $this->addressList('mailBcc');
    }

    public function subject(): string
    {
        $subject = trim((string)($this->settings['subject'] ?? ''));
        return $subject !== '' ? $subject : 'Page feedback';
    }

    /** Master switch: off serves an empty widget and rejects submissions. */
    public function enabled(): bool
    {
        return (bool)($this->settings['enabled'] ?? true);
    }

    /** true = headless: TYPO3 injects nothing, the front end embeds the widget itself. */
    public function jsonOutput(): bool
    {
        return (bool)($this->settings['jsonOutput'] ?? true);
    }

    /** @return string[] valid mail addresses only */
    private function addressList(string $key): array
    {
        $addresses = [];
        foreach (GeneralUtility::trimExplode(',', (string)($this->settings[$key] ?? ''), true) as $address) {
            if (GeneralUtility::validEmail($address)) {
                $addresses[] = $address;
            }
        }
        return $addresses;
    }
}