FAQ dinâmico para desentupimento de esgoto 24 horas em São Paulo: WordPress

function registra_faq_esgoto_cpt() {
    $labels = [
        'name' => 'Perguntas Frequentes',
        'singular_name' => 'Pergunta',
        'add_new_item' => 'Nova Pergunta',
        'edit_item' => 'Editar Pergunta',
    ];
    $args = [
        'labels' => $labels,
        'public' => true,
        'show_in_rest' => true,
        'supports' => ['title', 'editor', 'custom-fields'],
        'taxonomies' => ['categoria_faq', 'regiao_atendimento'],
        'rewrite' => ['slug' => 'faq-esgoto'],
        'capability_type' => 'post',
        'menu_icon' => 'dashicons-editor-help',
    ];
    register_post_type('faq_esgoto', $args);
}
add_action('init', 'registra_faq_esgoto_cpt');

function registra_faq_rest_endpoint() {
    register_rest_route('faq/v1', '/perguntas', [
        'methods' => 'GET',
        'callback' => 'faq_rest_perguntas_callback',
        'args' => [
            'categoria' => ['type' => 'string', 'sanitize_callback' => 'sanitize_text_field'],
            'regiao' => ['type' => 'string', 'sanitize_callback' => 'sanitize_text_field'],
            'busca' => ['type' => 'string', 'sanitize_callback' => 'sanitize_text_field'],
            'prioridade_min' => ['type' => 'integer', 'default' => 1],
            'per_page' => ['type' => 'integer', 'default' => 20, 'maximum' => 50],
            'page' => ['type' => 'integer', 'default' => 1],
        ],
        'permission_callback' => '__return_true',
    ]);
}
add_action('rest_api_init', 'registra_faq_rest_endpoint');

function FAQDynamic({ categoriaInicial, regiaoInicial }) {
    const [perguntas, setPerguntas] = useState([]);
    const [busca, setBusca] = useState('');
    const abortRef = useRef(null);

    useEffect(() => {
        if (abortRef.current) abortRef.current.abort();
        const controller = new AbortController();
        abortRef.current = controller;

        const params = new URLSearchParams({
            categoria: categoriaInicial,
            regiao: regiaoInicial,
            busca,
            per_page: 50
        });

        fetch(`/wp-json/faq/v1/perguntas?${params}`, { signal: controller.signal })
            .then(r => r.json())
            .then(data => setPerguntas(data))
            .catch(e => { if (e.name !== 'AbortError') console.error(e); });
    }, [categoriaInicial, regiaoInicial, busca]);

    return (
        <div className="faq-dinamico">
            <input
                type="search"
                placeholder="Filtrar perguntas..."
                value={busca}
                onChange={e => setBusca(e.target.value)}
                className="faq-busca"
            />
            <div className="faq-lista">
                {perguntas.map(p => (
                    <details key={p.id} className="faq-item">
                        <summary>{p.title.rendered}</summary>
                        <div dangerouslySetInnerHTML={{ __html: p.content.rendered }} />
                        {p.faq_whatsapp_texto && (
                            <a
                                href={`https://wa.me/5511999999999?text=${encodeURIComponent(p.faq_whatsapp_texto)}`}
                                target="_blank"
                                rel="noopener noreferrer"
                                className="faq-whatsapp"
                            >
                                Falar no WhatsApp
                            </a>
                        )}
                    </details>
                ))}
            </div>
        </div>
    );
}

function injeta_schema_faqpage($content) {
    if (!is_page_template('template-plantao-24h.php')) return $content;

    $args = [
        'post_type' => 'faq_esgoto',
        'posts_per_page' => -1,
        'tax_query' => [
            ['taxonomy' => 'categoria_faq', 'field' => 'slug', 'terms' => 'emergencia'],
        ],
        'meta_key' => 'faq_prioridade',
        'orderby' => 'meta_value_num',
        'order' => 'ASC',
    ];
    $faqs = new WP_Query($args);

    if (!$faqs->have_posts()) return $content;

    $schema = [
        '@context' => 'https://schema.org',
        '@type' => 'FAQPage',
        'mainEntity' => [],
    ];

    while ($faqs->have_posts()) {
        $faqs->the_post();
        $schema['mainEntity'][] = [
            '@type' => 'Question',
            'name' => get_the_title(),
            'acceptedAnswer' => [
                '@type' => 'Answer',
                'text' => wp_strip_all_tags(get_the_content()),
            ],
        ];
    }
    wp_reset_postdata();

    $json_ld = '<script type="application/ld+json">' . wp_json_encode($schema, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES) . '</script>';
    return $json_ld . $content;
}
add_filter('the_content', 'injeta_schema_faqpage', 99);

function invalida_cache_faq($post_id) {
    if (get_post_type($post_id) !== 'faq_esgoto') return;

    // Transients
    global $wpdb;
    $wpdb->query("DELETE FROM {$wpdb->options} WHERE option_name LIKE '_transient_faq_rest_cache_%' OR option_name LIKE '_transient_timeout_faq_rest_cache_%'");

    // Object cache
    wp_cache_flush_group('faq_esgoto');

    // WP Rocket
    if (function_exists('rocket_clean_domain')) rocket_clean_domain();

    // Nginx FastCGI Purge
    $urls_purge = [home_url('/plantao-24h/'), home_url('/faq-esgoto/')];
    foreach ($urls_purge as $url) {
        wp_remote_request($url, ['method' => 'PURGE', 'timeout' => 2]);
    }

    // Cloudflare (se configurado)
    if (defined('CLOUDFLARE_ZONE_ID') && defined('CLOUDFLARE_API_TOKEN')) {
        // chamada API purge_by_urls
    }
}
add_action('save_post_faq_esgoto', 'invalida_cache_faq');
add_action('delete_post', 'invalida_cache_faq');
add_action('edited_term', function($term_id, $taxonomy) {
    if (in_array($taxonomy, ['categoria_faq', 'regiao_atendimento'])) invalida_cache_faq(0);
}, 10, 2);

function whatsapp_webhook_handler() {
    $payload = json_decode(file_get_contents('php://input'), true);
    if (empty($payload['entry'][0]['changes'][0]['value']['messages'][0])) return;
    $msg = $payload['entry'][0]['changes'][0]['value']['messages'][0];
    $telefone = $msg['from'];
    $texto = $msg['text']['body'] ?? '';

    // Extrai referência da pergunta do FAQ
    if (preg_match('/Vi a pergunta sobre \'([^\']+)\'/', $texto, $m)) {
        $faq_titulo = $m[1];
        $faq_post = get_page_by_title($faq_titulo, OBJECT, 'faq_esgoto');
        $faq_id = $faq_post ? $faq_post->ID : 0;
    }

    // Agenda criação de lead assíncrona
    as_enqueue_async_action('criar_lead_faq_whatsapp', [
        'telefone' => $telefone,
        'faq_id' => $faq_id ?? 0,
        'origem' => 'faq_dinamico',
        'timestamp' => current_time('mysql'),
    ]);
}
add_action('wp_ajax_nopriv_whatsapp_webhook', 'whatsapp_webhook_handler');
add_action('wp_ajax_whatsapp_webhook', 'whatsapp_webhook_handler');