<?php
/**
 * fea-pensamientos — Galerías Joomla y pausa aleatoria en artículos.
 *
 * Reutiliza /images de Joomla sin duplicar ficheros en WordPress.
 */

if (!defined('FEA_JOOMLA_IMAGES_DIR')) {
    define('FEA_JOOMLA_IMAGES_DIR', file_exists('/web/images') ? '/web/images' : '/var/www/joomla-images');
}

if (!defined('FEA_JOOMLA_IMAGES_URL')) {
    $fea_is_prod = (defined('ABSPATH') && strpos((string) ABSPATH, '/web/wp-nuevo/') === 0)
        || (isset($_SERVER['HTTP_HOST']) && preg_match('/(^|\.)feadulta\.com$/', (string) $_SERVER['HTTP_HOST']))
        || file_exists('/web/images');

    define(
        'FEA_JOOMLA_IMAGES_URL',
        $fea_is_prod ? 'https://www.feadulta.com/images' : 'https://farmer.taild3aaf6.ts.net/joomla/images'
    );
}

if (!defined('FEA_PENS_DIR')) {
    define('FEA_PENS_DIR', rtrim(FEA_JOOMLA_IMAGES_DIR, '/') . '/Pensamientos');
}

if (!defined('FEA_PENS_URL')) {
    define('FEA_PENS_URL', rtrim(FEA_JOOMLA_IMAGES_URL, '/') . '/Pensamientos');
}

if (!defined('FEA_GALLERY_PER_PAGE')) {
    define('FEA_GALLERY_PER_PAGE', 72);
}

if (!defined('FEA_RANDOM_THOUGHT_EXCLUDED_CATS')) {
    // Categorías que NO muestran pensamiento aleatorio:
    //   1645 Lecturas bíblicas · 28 Evangelios y comentarios (textos del evangelio)
    //   20   Presentación colaboradores (fichas de colaboradores)
    // 1647 Comentarios al evangelio SÍ muestra pensamiento (decisión Rafa 2026-06-19).
    define('FEA_RANDOM_THOUGHT_EXCLUDED_CATS', '1645,28,20');
}

if (!defined('FEA_RANDOM_THOUGHT_EXCLUDED_IDS')) {
    // Posts estructurales (páginas disfrazadas de post) que no deben llevar pensamiento.
    //   17563 = índice /colaboradores/ (está en «Sin categoría», no lo cubre la cat 20).
    define('FEA_RANDOM_THOUGHT_EXCLUDED_IDS', '17563');
}

if (!defined('FEA_GALLERY_MANIFEST')) {
    define('FEA_GALLERY_MANIFEST', WP_CONTENT_DIR . '/uploads/fea-gallery-manifest.json');
}

function fea_gallery_safe_dir(string $dir): string {
    $dir = trim($dir);
    $dir = trim($dir, "/\\ \t\n\r\0\x0B");
    return preg_replace('/[^A-Za-z0-9._-]/', '', $dir);
}

function fea_gallery_base_dir(): string {
    return rtrim(FEA_JOOMLA_IMAGES_DIR, '/');
}

function fea_gallery_base_url(): string {
    return rtrim(FEA_JOOMLA_IMAGES_URL, '/');
}

function fea_gallery_manifest_files(string $dir, string $order = 'desc'): array {
    static $manifest = null;

    if ($manifest === null) {
        $manifest = [];
        $path = (string) FEA_GALLERY_MANIFEST;
        if (is_readable($path)) {
            $decoded = json_decode((string) file_get_contents($path), true);
            if (is_array($decoded)) {
                $manifest = $decoded;
            }
        }
    }

    if (empty($manifest[$dir]) || !is_array($manifest[$dir])) return [];

    $files = array_values(array_filter(array_map('strval', $manifest[$dir]), function ($file) {
        return preg_match('/\.(jpe?g|png|gif|webp)$/i', $file);
    }));
    natsort($files);
    $files = array_values($files);
    if ($order === 'desc') {
        $files = array_reverse($files);
    }
    return $files;
}

function fea_gallery_files(string $dir, string $order = 'desc'): array {
    $dir = fea_gallery_safe_dir($dir);
    if ($dir === '') return [];

    $path = fea_gallery_base_dir() . '/' . $dir;
    if (!is_dir($path) || !is_readable($path)) {
        return fea_gallery_manifest_files($dir, $order);
    }

    $mtime = (int) @filemtime($path);
    $cache_key = 'fea_gallery_' . md5($path . '|' . $mtime . '|' . $order);
    $cached = get_transient($cache_key);
    if (is_array($cached)) return $cached;

    $files = [];
    $entries = @scandir($path);
    if (!is_array($entries)) return [];

    foreach ($entries as $entry) {
        if ($entry === '.' || $entry === '..') continue;
        if (!preg_match('/\.(jpe?g|png|gif|webp)$/i', $entry)) continue;
        if (!is_file($path . '/' . $entry)) continue;
        $files[] = $entry;
    }

    natsort($files);
    $files = array_values($files);
    if ($order === 'desc') {
        $files = array_reverse($files);
    }

    set_transient($cache_key, $files, 10 * MINUTE_IN_SECONDS);
    return $files;
}

function fea_gallery_url(string $dir, string $file): string {
    return fea_gallery_base_url() . '/' . rawurlencode(fea_gallery_safe_dir($dir)) . '/' . rawurlencode($file);
}

function fea_gallery_page_param(string $dir): string {
    return 'fea_gallery_' . substr(md5($dir), 0, 8);
}

function fea_gallery_render(array $atts = []): string {
    $atts = shortcode_atts([
        'dir' => 'Pensamientos',
        'per_page' => (string) FEA_GALLERY_PER_PAGE,
        'order' => 'desc',
    ], $atts, 'fea_galeria');

    $dir = fea_gallery_safe_dir((string) $atts['dir']);
    if ($dir === '') return '';

    $order = strtolower((string) $atts['order']) === 'asc' ? 'asc' : 'desc';
    $files = fea_gallery_files($dir, $order);
    if (!$files) {
        return '<p class="fea-gallery-empty">Galería no disponible.</p>';
    }

    $per_page = max(12, min(144, (int) $atts['per_page']));
    $total = count($files);
    $pages = max(1, (int) ceil($total / $per_page));
    $param = fea_gallery_page_param($dir);
    $page = isset($_GET[$param]) ? max(1, (int) $_GET[$param]) : 1;
    $page = min($page, $pages);
    $offset = ($page - 1) * $per_page;
    $visible = array_slice($files, $offset, $per_page);

    $html = '<div class="fea-gallery" data-fea-gallery="' . esc_attr($dir) . '">';
    $html .= '<div class="fea-gallery-grid">';
    foreach ($visible as $file) {
        $url = fea_gallery_url($dir, $file);
        $alt = preg_replace('/\.[^.]+$/', '', $file);
        $html .= '<a class="fea-gallery-item" href="' . esc_url($url) . '" data-fea-lightbox="1">';
        $html .= '<img src="' . esc_url($url) . '" alt="' . esc_attr($alt) . '" loading="lazy" decoding="async">';
        $html .= '</a>';
    }
    $html .= '</div>';

    if ($pages > 1) {
        $html .= '<nav class="fea-gallery-pages" aria-label="Paginación de galería">';
        if ($page > 1) {
            $html .= '<a href="' . esc_url(add_query_arg($param, $page - 1)) . '">Anterior</a>';
        }
        $html .= '<span>Página ' . esc_html((string) $page) . ' de ' . esc_html((string) $pages) . '</span>';
        if ($page < $pages) {
            $html .= '<a href="' . esc_url(add_query_arg($param, $page + 1)) . '">Siguiente</a>';
        }
        $html .= '</nav>';
    }

    $html .= '</div>';
    return $html;
}

add_shortcode('fea_galeria', 'fea_gallery_render');

add_filter('the_content', function ($content) {
    if (is_admin() || stripos($content, '{gallery}') === false) return $content;

    return preg_replace_callback(
        '/\{gallery\}\s*([^{}]+?)\s*\{\/gallery\}/i',
        function ($m) {
            return fea_gallery_render(['dir' => trim($m[1])]);
        },
        $content
    );
}, 8);

function fea_random_thought_html(): string {
    $files = fea_gallery_files('Pensamientos', 'desc');
    if (!$files) return '';

    $file = $files[array_rand($files)];
    $url = fea_gallery_url('Pensamientos', $file);

    return '<aside class="fea-random-thought" aria-label="Una pausa">'
        . '<div class="fea-random-thought-title"><span></span><strong>Una pausa para el alma</strong><span></span></div>'
        . '<a href="' . esc_url($url) . '" data-fea-lightbox="1">'
        . '<img src="' . esc_url($url) . '" alt="Pensamiento aleatorio" loading="lazy" decoding="async">'
        . '</a></aside>';
}

function fea_random_thought_excluded(): bool {
    if (!is_singular('post')) return true;

    $post_id = get_the_ID();

    $excluded_ids = array_filter(array_map('intval', explode(',', (string) FEA_RANDOM_THOUGHT_EXCLUDED_IDS)));
    if ($post_id && in_array((int) $post_id, $excluded_ids, true)) return true;

    if ($post_id) {
        $raw = (string) get_post_field('post_content', $post_id);
        if (stripos($raw, '{gallery}') !== false || stripos($raw, '[fea_galeria') !== false) {
            return true;
        }
    }

    $ids = array_filter(array_map('intval', explode(',', (string) FEA_RANDOM_THOUGHT_EXCLUDED_CATS)));
    foreach ($ids as $id) {
        if ($id > 0 && has_category($id)) return true;
    }
    return false;
}

add_shortcode('fea_reflexion_aleatoria', function () {
    return fea_random_thought_html();
});

add_filter('the_content', function ($content) {
    if (is_admin() || !is_main_query() || !in_the_loop() || fea_random_thought_excluded()) {
        return $content;
    }
    if (strpos($content, 'fea-random-thought') !== false) return $content;

    $thought = fea_random_thought_html();
    return $thought ? $content . $thought : $content;
}, 18);

function fea_pensamientos_assets_needed(): bool {
    if (!is_singular()) return false;

    $post_id = get_queried_object_id();
    $raw = $post_id ? (string) get_post_field('post_content', $post_id) : '';
    if (stripos($raw, '{gallery}') !== false || stripos($raw, '[fea_galeria') !== false || stripos($raw, '[fea_reflexion_aleatoria') !== false) {
        return true;
    }

    return !fea_random_thought_excluded();
}

add_action('wp_head', function () {
    if (!fea_pensamientos_assets_needed()) return;

    ?>
    <style>
    .fea-gallery {
        width: min(1180px, 100%);
        max-width: none;
        margin: 1.5rem auto 2rem;
    }
    .fea-gallery .fea-gallery-grid {
        display: grid;
        grid-template-columns: repeat(3, minmax(0, 1fr)) !important;
        gap: 0.65rem !important;
    }
    .fea-gallery-item {
        display: flex;
        align-items: center;
        justify-content: center;
        aspect-ratio: 275 / 160;
        overflow: hidden;
        border: 1px solid rgba(0,0,0,0.08);
        border-radius: 3px;
        background: #fff;
        box-shadow: 0 1px 3px rgba(0,0,0,0.07);
    }
    .fea-gallery-item img {
        width: 98.5%;
        height: 96.5%;
        object-fit: contain;
        display: block;
        transition: transform 0.16s ease;
    }
    .fea-gallery-item:hover img { transform: scale(1.02); }
    .fea-gallery-pages {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 1rem;
        margin-top: 1.25rem;
        font-size: 0.95rem;
    }
    .fea-gallery-pages a {
        padding: 0.45rem 0.75rem;
        border: 1px solid currentColor;
        border-radius: 6px;
        text-decoration: none;
    }
    .fea-random-thought {
        margin: 2.4rem auto 1.4rem;
        max-width: 720px;
        text-align: center;
    }
    .fea-random-thought-title {
        display: grid;
        grid-template-columns: 1fr auto 1fr;
        align-items: center;
        gap: 0.75rem;
        margin-bottom: 1rem;
        color: #7f1d1d;
        font-size: 0.95rem;
    }
    .fea-random-thought-title span {
        height: 1px;
        background: currentColor;
        opacity: 0.28;
    }
    .fea-random-thought a { display: inline-block; max-width: min(100%, 560px); }
    .fea-random-thought img {
        display: block;
        width: 100%;
        height: auto;
        border-radius: 6px;
        box-shadow: 0 8px 24px rgba(0,0,0,0.14);
    }
    .fea-lightbox {
        position: fixed;
        inset: 0;
        z-index: 99999;
        display: none;
        align-items: center;
        justify-content: center;
        padding: 4rem 5rem;
        background: rgba(0,0,0,0.86);
    }
    .fea-lightbox.is-open { display: flex; }
    .fea-lightbox-frame {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 100%;
        height: 100%;
    }
    .fea-lightbox-frame img {
        max-width: min(100%, 1100px);
        max-height: calc(100vh - 8rem);
        width: auto;
        height: auto;
        border-radius: 4px;
        background: #fff;
        box-shadow: 0 18px 60px rgba(0,0,0,0.45);
    }
    .fea-lightbox button {
        position: absolute;
        border: 0;
        border-radius: 999px;
        background: rgba(255,255,255,0.92);
        color: #111;
        line-height: 1;
        cursor: pointer;
    }
    .fea-lightbox-close {
        top: 0.75rem;
        right: 0.75rem;
        width: 2.5rem;
        height: 2.5rem;
        font-size: 1.6rem;
    }
    .fea-lightbox-prev,
    .fea-lightbox-next {
        top: 50%;
        width: 3rem;
        height: 3rem;
        font-size: 2rem;
        transform: translateY(-50%);
    }
    .fea-lightbox-prev { left: 1rem; }
    .fea-lightbox-next { right: 1rem; }
    @media (max-width: 700px) {
        .fea-gallery { width: min(100%, calc(100vw - 1rem)); }
        .fea-gallery .fea-gallery-grid { grid-template-columns: repeat(2, minmax(0, 1fr)) !important; }
        .fea-lightbox { padding: 3.5rem 1rem; }
        .fea-lightbox-prev,
        .fea-lightbox-next {
            top: auto;
            bottom: 0.75rem;
            transform: none;
        }
    }
    </style>
    <script>
    document.addEventListener('DOMContentLoaded', function () {
        var links = Array.prototype.slice.call(document.querySelectorAll('[data-fea-lightbox="1"]'));
        if (!links.length) return;

        var box = document.createElement('div');
        box.className = 'fea-lightbox';
        box.innerHTML = '<button type="button" class="fea-lightbox-close" aria-label="Cerrar">&times;</button><button type="button" class="fea-lightbox-prev" aria-label="Anterior">&#8249;</button><div class="fea-lightbox-frame"><img alt=""></div><button type="button" class="fea-lightbox-next" aria-label="Siguiente">&#8250;</button>';
        document.body.appendChild(box);

        var img = box.querySelector('img');
        var closeButton = box.querySelector('.fea-lightbox-close');
        var prevButton = box.querySelector('.fea-lightbox-prev');
        var nextButton = box.querySelector('.fea-lightbox-next');
        var index = 0;

        var show = function (nextIndex) {
            index = (nextIndex + links.length) % links.length;
            img.src = links[index].href;
            img.alt = links[index].querySelector('img') ? links[index].querySelector('img').alt : '';
            box.classList.add('is-open');
        };
        var close = function () {
            box.classList.remove('is-open');
            img.removeAttribute('src');
        };

        box.addEventListener('click', function (event) {
            if (event.target === box) close();
        });
        closeButton.addEventListener('click', close);
        prevButton.addEventListener('click', function () { show(index - 1); });
        nextButton.addEventListener('click', function () { show(index + 1); });
        document.addEventListener('keydown', function (event) {
            if (!box.classList.contains('is-open')) return;
            if (event.key === 'Escape') close();
            if (event.key === 'ArrowLeft') show(index - 1);
            if (event.key === 'ArrowRight') show(index + 1);
        });
        links.forEach(function (link, linkIndex) {
            link.addEventListener('click', function (event) {
                event.preventDefault();
                show(linkIndex);
            });
        });
    });
    </script>
    <?php
}, 30);