<?php

declare(strict_types=1);

function siteSettingsPath(): string
{
    return BASE_PATH . '/data/site_settings.json';
}

function siteSettings(): array
{
    static $settings = null;
    if ($settings !== null) {
        return $settings;
    }
    $settings = [];
    $path = siteSettingsPath();
    if (is_file($path)) {
        $data = @json_decode((string)file_get_contents($path), true);
        if (is_array($data)) {
            $settings = $data;
        }
    }
    return $settings;
}

function siteTitle(): string
{
    return siteSettings()['site_title'] ?? 'varlog';
}

function siteClaim(): string
{
    return siteSettings()['site_claim'] ?? 'journal de Cédrix · informatique, hack & loisirs';
}

function siteLang(): string
{
    return siteSettings()['site_lang'] ?? 'fr-FR';
}

function siteLangOgLocale(): string
{
    return str_replace('-', '_', siteLang());
}

function postsPerPage(): int
{
    return max(1, (int)(siteSettings()['posts_per_page'] ?? 12));
}

function siteLicenseLabel(): string
{
    return siteSettings()['site_license_label'] ?? 'CC BY 4.0';
}

function siteLicenseUrl(): string
{
    return siteSettings()['site_license_url'] ?? 'https://creativecommons.org/licenses/by/4.0/';
}

function apacheAccessLog(): string
{
    $fromSettings = siteSettings()['apache_access_log'] ?? '';
    if ($fromSettings !== '') {
        return $fromSettings;
    }
    return (string)($_ENV['APACHE_ACCESS_LOG'] ?? getenv('APACHE_ACCESS_LOG') ?: '*-access.log');
}

function saveSiteSettings(array $data): bool
{
    $current = siteSettings();
    $stringKeys = ['site_title', 'site_claim', 'site_lang', 'site_license_label', 'site_license_url', 'apache_access_log'];
    foreach ($stringKeys as $key) {
        if (array_key_exists($key, $data)) {
            $val = trim((string)$data[$key]);
            if ($val !== '') {
                $current[$key] = $val;
            }
        }
    }
    if (array_key_exists('posts_per_page', $data)) {
        $val = (int)$data['posts_per_page'];
        if ($val > 0) {
            $current['posts_per_page'] = $val;
        }
    }
    return file_put_contents(
        siteSettingsPath(),
        json_encode($current, JSON_PRETTY_PRINT | JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES)
    ) !== false;
}