<?php

/**
 * Format a Pods datetime string (e.g. "2026-01-17 00:00:00") via date_i18n.
 * Default format is "j F Y" (full month name, FR/EN per WP locale).
 * Returns empty string for null/empty/"0000-00-00..." inputs.
 */
function thalim_format_date($raw, $lang = 'fr', $format = 'j F Y') {
    if (!$raw || str_starts_with($raw, '0000-00-00')) return '';
    $ts = strtotime($raw);
    if ($ts === false || $ts < 0) return '';
    return date_i18n($format, $ts);
}

/**
 * Tell whether an image is displayed in portrait, taking EXIF orientation
 * into account. WordPress stores the raw (un-rotated) width/height, but the
 * browser auto-rotates JPEGs that carry an EXIF orientation flag of 5–8
 * (90°/270° rotation), which swaps the displayed dimensions. Without this,
 * a phone photo shot in portrait can be mis-classified as landscape.
 */
function thalim_image_is_portrait($doc_id, $w, $h) {
    $path = get_attached_file($doc_id);
    if ($path && function_exists('exif_read_data') && preg_match('/\.jpe?g$/i', $path)) {
        $exif = @exif_read_data($path);
        $orientation = isset($exif['Orientation']) ? (int) $exif['Orientation'] : 0;
        if (in_array($orientation, [5, 6, 7, 8], true)) {
            [$w, $h] = [$h, $w];
        }
    }
    return $h > $w;
}

/**
 * Resolve all Pods custom fields for a single post into a display-ready array.
 */
function thalim_get_single_data($post_id) {
    $lang = thalim_current_language();

    $data = [
        // Text fields
        'sous_titre'            => thalim_bilingual( get_post_meta($post_id, 'sous-titre', true) ?: '', $lang ),
        // wp_kses_post: rendus en |raw dans single.twig (autoescape off) et
        // éditables par les contributeurs listés en membres → filtrer le HTML.
        'reference_bibliographique' => wp_kses_post( get_post_meta($post_id, 'reference_bibliographique', true) ?: '' ),
        'editeur'               => get_post_meta($post_id, 'editeur', true) ?: '',
        'journal'               => get_post_meta($post_id, 'journal', true) ?: '',
        'lieu'                  => thalim_bilingual( get_post_meta($post_id, 'lieu', true) ?: '', $lang ),
        'adresse'               => nl2br( esc_html( get_post_meta($post_id, 'adresse', true) ?: '' ) ),
        'autrepersonnes'        => get_post_meta($post_id, 'autrepersonnes', true) ?: '',
        'autre_autrepersonnes'  => get_post_meta($post_id, 'autre_autrepersonnes', true) ?: '',
        'body_en'               => apply_filters( 'the_content', wp_kses_post( get_post_meta($post_id, 'body_en', true) ?: '' ) ),

        // Dates (formatted for display)
        'datetime'        => thalim_format_date(get_post_meta($post_id, 'datetime', true), $lang),
        'date_de_debut'   => '',
        'date_de_fin'     => '',
        'date_debut_ymd'  => '',
        'date_fin_ymd'    => '',
        'heure_de_debut'  => substr( get_post_meta($post_id, 'heure_de_debut', true) ?: '', 0, 5 ),
        'heure_de_fin'    => substr( get_post_meta($post_id, 'heure_de_fin', true) ?: '', 0, 5 ),

        // URLs
        'hal_url'  => get_post_meta($post_id, 'hal_url', true) ?: '',
        'hal_file' => get_post_meta($post_id, 'hal_file', true) ?: '',
        'canal_u'   => array_values( array_filter( array_map( function( $url ) {
            if ( preg_match( '/(\d+)\/?$/', trim( $url ), $m ) ) {
                return 'https://www.canal-u.tv/embed/' . $m[1] . '?t=0';
            }
            return '';
        }, get_post_meta( $post_id, 'lien_canal_u', false ) ) ) ),
        'youtube'   => array_values( array_filter( array_map( function( $url ) {
            $url = trim( $url );
            // youtu.be/ID or youtube.com/embed/ID or youtube.com/watch?v=ID
            if ( preg_match( '/(?:youtu\.be\/|youtube\.com\/(?:embed\/|watch\?.*v=|shorts\/))([A-Za-z0-9_-]{11})/', $url, $m ) ) {
                return 'https://www.youtube-nocookie.com/embed/' . $m[1];
            }
            return '';
        }, get_post_meta( $post_id, 'lien_youtube', false ) ) ) ),

        // Resolved below
        'liens_externes'  => [],
        'membres'              => [],
        'autre_membres'        => [],
        'autre_fonction_label' => '',
        'axes'                 => [],
        'etiquettes'      => [],
        'programmes'      => [],
        'annonces_liees'  => [],
        'seances_a_venir' => [],
        'seances_passees' => [],
        'show_image_titles' => (bool) get_post_meta($post_id, 'afficher_le_titre_des_images_en_legende', true),
        'images'          => [],
        'documents'       => [],
        'type_label'      => '',
        'fonction_label'  => '',
        'parent_slug'     => '',
        'parent_name'     => '',
        'parent_link'     => '',
        'category_name'   => '',
        'category_link'   => '',
        'is_newsletter'   => false,
        'newsletter_html' => '',
    ];

    // Newsletters archivées (cat « newsletter ») : le post_content est un
    // document HTML email complet (table 600px + <style> media queries). Injecté
    // dans la page il perd son <head>/<style> et déborde en mobile ; le template
    // le rend donc isolé dans une <iframe srcdoc> — on passe le HTML brut (pas
    // filtré par the_content/wpautop qui casserait le document).
    if (in_array(thalim_cat_id('newsletter'), wp_get_post_categories($post_id), true)) {
        $data['is_newsletter']   = true;
        $data['newsletter_html'] = get_post_field('post_content', $post_id);
    }

    // --- Dates ---
    $raw_debut = get_post_meta($post_id, 'date_de_debut', true);
    $raw_fin   = get_post_meta($post_id, 'date_de_fin', true);
    $ts_debut  = ($raw_debut && !str_starts_with($raw_debut, '0000-00-00')) ? strtotime($raw_debut) : 0;
    $ts_fin    = ($raw_fin   && !str_starts_with($raw_fin,   '0000-00-00')) ? strtotime($raw_fin)   : 0;

    $data['date_de_debut'] = thalim_format_date($raw_debut, $lang);
    $data['date_de_fin']   = thalim_format_date($raw_fin, $lang);
    if ($ts_debut) $data['date_debut_ymd'] = date('Y-m-d', $ts_debut);
    if ($ts_fin)   $data['date_fin_ymd']   = date('Y-m-d', $ts_fin);

    // Ouvrages: override display to year only — raw timestamps and
    // *_ymd fields stay full-precision so sorting/filtering on index pages
    // (`thalim_event_date_order`) keeps working.
    if (in_array(thalim_cat_id('ouvrages'), wp_get_post_categories($post_id), true)) {
        $data['date_de_debut'] = thalim_format_date($raw_debut, $lang, 'Y');
        $data['date_de_fin']   = thalim_format_date($raw_fin, $lang, 'Y');
        $data['datetime']      = thalim_format_date(get_post_meta($post_id, 'datetime', true), $lang, 'Y');
    }

    // --- External links (up to 3) ---
    for ($i = 1; $i <= 3; $i++) {
        $url = get_post_meta($post_id, 'lien_externe_' . $i, true);
        if ($url) {
            $titre = thalim_bilingual( get_post_meta($post_id, 'titre_du_lien_externe_' . $i, true) ?: '', $lang );
            if (!$titre) {
                $host  = parse_url($url, PHP_URL_HOST) ?: $url;
                $parts = explode('.', $host);
                $titre = count($parts) >= 2 ? implode('.', array_slice($parts, -2)) : $host;
            }
            $data['liens_externes'][] = [
                'url'   => $url,
                'titre' => $titre,
            ];
        }
    }

    // --- Category hierarchy for breadcrumb and color ---
    $categories = wp_get_post_categories($post_id, ['fields' => 'all']);
    $excluded_ids = array_filter([ thalim_cat_id('seance'), thalim_cat_id('non-classe') ]);
    foreach ($categories as $cat) {
        if (in_array($cat->term_id, $excluded_ids)) continue;
        $ancestor_ids = get_ancestors($cat->term_id, 'category');
        if (!empty($ancestor_ids)) {
            $root = get_category(end($ancestor_ids));
            $data['parent_slug'] = thalim_category_color_slug($root->term_id, $root->slug);
            $data['parent_name'] = $root->name;
            $data['parent_link'] = get_category_link($root->term_id);
            $data['category_name'] = $cat->name;
        } else {
            $data['parent_slug'] = thalim_category_color_slug($cat->term_id, $cat->slug);
            $data['parent_name'] = $cat->name;
            $data['parent_link'] = get_category_link($cat->term_id);
            $data['category_name'] = $lang === 'en' ? 'Other' : 'Autre';
        }
        // category_link: for direct posts (no ancestors), point to the /autres index
        $data['category_link'] = empty($ancestor_ids)
            ? trailingslashit(get_category_link($cat->term_id)) . 'autres/'
            : get_category_link($cat->term_id);
        break;
    }

    // --- Documents joints: split images vs files ---
    $doc_ids = get_post_meta($post_id, 'documents_joints', false);
    foreach ($doc_ids as $doc_id) {
        $mime = get_post_mime_type($doc_id);
        if (!$mime) continue;
        if (str_starts_with($mime, 'image/')) {
            $src = wp_get_attachment_image_url($doc_id, 'large');
            if ($src) {
                $meta = wp_get_attachment_metadata($doc_id);
                $w = isset($meta['width']) ? $meta['width'] : 0;
                $h = isset($meta['height']) ? $meta['height'] : 0;
                $data['images'][] = [
                    'url'      => $src,
                    'alt'      => get_post_meta($doc_id, '_wp_attachment_image_alt', true) ?: '',
                    'caption'  => thalim_bilingual(wp_get_attachment_caption($doc_id) ?: '', $lang),
                    'title'    => thalim_bilingual(get_the_title($doc_id) ?: '', $lang),
                    'portrait' => thalim_image_is_portrait($doc_id, $w, $h),
                ];
            }
        } else {
            $data['documents'][] = [
                'url'   => wp_get_attachment_url($doc_id),
                'title' => thalim_bilingual(get_the_title($doc_id) ?: '', $lang) ?: basename(get_attached_file($doc_id)),
            ];
        }
    }

    // --- Members (user IDs → name + profile URL) ---
    foreach (get_post_meta($post_id, 'membres', false) as $uid) {
        $user = get_userdata($uid);
        if ($user) {
            $data['membres'][] = [
                'name' => $user->display_name,
                'url'  => get_author_posts_url($uid),
            ];
        }
    }

    // --- Autre membres (user IDs → name + profile URL) ---
    foreach (get_post_meta($post_id, 'autre_membres', false) as $uid) {
        $user = get_userdata($uid);
        if ($user) {
            $data['autre_membres'][] = [
                'name' => $user->display_name,
                'url'  => get_author_posts_url($uid),
            ];
        }
    }

    // --- Axes thématiques (taxonomy term IDs) ---
    $axe_ids = get_post_meta($post_id, 'axes_thematiques', false);
    foreach ($axe_ids as $axe_id) {
        $term = get_term(intval($axe_id), 'axe_thematique');
        if ($term && !is_wp_error($term)) {
            $data['axes'][] = [
                'id'   => $term->term_id,
                'name' => thalim_bilingual($term->name, $lang),
                'url'  => get_term_link($term),
            ];
        }
    }

    // --- Étiquettes (taxonomy term IDs) ---
    $tag_ids = get_post_meta($post_id, 'etiquettes', false);
    foreach ($tag_ids as $tag_id) {
        $term = get_term(intval($tag_id), 'post_tag');
        if ($term && !is_wp_error($term)) {
            $data['etiquettes'][] = [
                'id'   => $term->term_id,
                'name' => thalim_bilingual($term->name, $lang),
                'url'  => get_term_link($term),
            ];
        }
    }

    // --- Programmes de recherche (taxonomy term IDs) ---
    $prog_ids = get_post_meta($post_id, 'programmes_de_recherche', false);
    foreach ($prog_ids as $prog_id) {
        $term = get_term(intval($prog_id), 'programme_de_recherche');
        if ($term && !is_wp_error($term)) {
            $data['programmes'][] = [
                'id'   => $term->term_id,
                'name' => thalim_bilingual($term->name, $lang),
                'url'  => get_term_link($term),
            ];
        }
    }

    // --- Annonces liées (related posts) ---
    $related_ids = get_post_meta($post_id, 'annonces_liees', false);
    if (!empty($related_ids)) {
        $data['annonces_liees'] = Timber::get_posts([
            'post_type'      => 'post',
            'post__in'       => array_map('intval', $related_ids),
            'posts_per_page' => -1,
        ]);
    }

    // --- Séances (session posts) — split into upcoming / past ---
    $seance_ids = get_post_meta($post_id, 'seances', false);
    $data['seances_a_venir'] = [];
    $data['seances_passees'] = [];
    if (!empty($seance_ids)) {
        $seance_posts = Timber::get_posts([
            'post_type'      => 'post',
            'post__in'       => array_map('intval', $seance_ids),
            'posts_per_page' => -1,
            'orderby'        => 'meta_value',
            'meta_key'       => 'date_de_debut',
            'order'          => 'ASC',
            'post_status'    => ['publish', 'future'],
        ]);
        $now = time();
        $current_year = date('Y');
        $months_fr = ['jan.', 'fév.', 'mars', 'avr.', 'mai', 'juin', 'juil.', 'août', 'sept.', 'oct.', 'nov.', 'déc.'];
        $months_en = ['Jan.', 'Feb.', 'Mar.', 'Apr.', 'May', 'Jun.', 'Jul.', 'Aug.', 'Sep.', 'Oct.', 'Nov.', 'Dec.'];

        foreach ($seance_posts as $seance) {
            $raw_date = get_post_meta($seance->ID, 'date_de_debut', true);
            $ts = $raw_date ? strtotime($raw_date) : strtotime($seance->post_date);

            // Only expose date_fin when it's a different day than date_de_debut
            $raw_fin = get_post_meta($seance->ID, 'date_de_fin', true);
            $ts_fin  = $raw_fin && !str_starts_with($raw_fin, '0000-00-00') ? strtotime($raw_fin) : false;
            $date_fin_display = ($ts_fin && date('Y-m-d', $ts_fin) !== date('Y-m-d', $ts))
                ? thalim_format_date($raw_fin, $lang)
                : '';

            $month_idx = intval(date('n', $ts)) - 1;
            $seance_data = [
                'post'            => $seance,
                'day'             => date('d', $ts),
                'month'           => ($lang === 'en') ? $months_en[$month_idx] : $months_fr[$month_idx],
                'year'            => (date('Y', $ts) !== $current_year) ? date('Y', $ts) : '',
                'date_full'       => thalim_format_date($raw_date, $lang),
                'date_fin'        => $date_fin_display,
                'heure_de_debut'  => substr( get_post_meta($seance->ID, 'heure_de_debut', true) ?: '', 0, 5 ),
                'heure_de_fin'    => substr( get_post_meta($seance->ID, 'heure_de_fin', true) ?: '', 0, 5 ),
                'lieu'            => thalim_bilingual( get_post_meta($seance->ID, 'lieu', true) ?: '', $lang ),
                'adresse'         => nl2br( esc_html( get_post_meta($seance->ID, 'adresse', true) ?: '' ) ),
                'body_en'         => apply_filters( 'the_content', wp_kses_post( get_post_meta($seance->ID, 'body_en', true) ?: '' ) ),
                'intervenants'    => [],
                'images'          => [],
                'documents'       => [],
                'liens_externes'  => [],
                'annonces_liees'  => [],
            ];

            // Resolve intervenants (membres or autrepersonnes)
            $m_ids = get_post_meta($seance->ID, 'membres', false);
            if (empty($m_ids)) {
                $m_ids = get_post_meta($seance->ID, 'autre_membres', false);
            }
            foreach ($m_ids as $uid) {
                $user = get_userdata($uid);
                if ($user) {
                    $seance_data['intervenants'][] = [
                        'name' => $user->display_name,
                        'url'  => get_author_posts_url($uid),
                    ];
                }
            }
            $seance_data['autrepersonnes'] = get_post_meta($seance->ID, 'autrepersonnes', true) ?: '';
            $seance_data['show_image_titles'] = (bool) get_post_meta($seance->ID, 'afficher_le_titre_des_images_en_legende', true);

            // Documents joints: images and files
            $s_doc_ids = get_post_meta($seance->ID, 'documents_joints', false);
            foreach ($s_doc_ids as $doc_id) {
                $mime = get_post_mime_type($doc_id);
                if (!$mime) continue;
                if (str_starts_with($mime, 'image/')) {
                    $src = wp_get_attachment_image_url($doc_id, 'large');
                    if ($src) {
                        $seance_data['images'][] = [
                            'url'     => $src,
                            'alt'     => get_post_meta($doc_id, '_wp_attachment_image_alt', true) ?: '',
                            'caption' => thalim_bilingual(wp_get_attachment_caption($doc_id) ?: '', $lang),
                            'title'   => thalim_bilingual(get_the_title($doc_id) ?: '', $lang),
                        ];
                    }
                } else {
                    $seance_data['documents'][] = [
                        'url'   => wp_get_attachment_url($doc_id),
                        'title' => thalim_bilingual(get_the_title($doc_id) ?: '', $lang) ?: basename(get_attached_file($doc_id)),
                    ];
                }
            }

            // External links (up to 3)
            for ($i = 1; $i <= 3; $i++) {
                $url = get_post_meta($seance->ID, 'lien_externe_' . $i, true);
                if ($url) {
                    $titre = thalim_bilingual( get_post_meta($seance->ID, 'titre_du_lien_externe_' . $i, true) ?: '', $lang );
                    if (!$titre) {
                        $host  = parse_url($url, PHP_URL_HOST) ?: $url;
                        $parts = explode('.', $host);
                        $titre = count($parts) >= 2 ? implode('.', array_slice($parts, -2)) : $host;
                    }
                    $seance_data['liens_externes'][] = ['url' => $url, 'titre' => $titre];
                }
            }

            // Annonces liées
            $s_related_ids = get_post_meta($seance->ID, 'annonces_liees', false);
            if (!empty($s_related_ids)) {
                $seance_data['annonces_liees'] = Timber::get_posts([
                    'post_type'      => 'post',
                    'post__in'       => array_map('intval', $s_related_ids),
                    'posts_per_page' => -1,
                ]);
            }

            if ($ts >= $now) {
                $data['seances_a_venir'][] = $seance_data;
            } else {
                $data['seances_passees'][] = $seance_data;
            }
        }
        // Past séances: most recent first
        $data['seances_passees'] = array_reverse($data['seances_passees']);
    }

    // --- Type label (category-conditional type fields) ---
    $type_fields = [
        'type_colloque_journee_d_etude',
        'type_soutenance',
        'type_evenement_culturel',
        'type_media',
        'type_captation',
        'type_revue_collection',
        'type_autre',
    ];
    foreach ($type_fields as $field) {
        $val = get_post_meta($post_id, $field, true);
        if ($val) {
            $data['type_label'] = thalim_bilingual( $val, $lang );
            break;
        }
    }

    // --- Fonction label (first non-empty fonction_* field) ---
    $fonction_fields = [
        'fonction_auteur',
        'fonction_organisation',
        'fonction_intervention',
        'fonction_redaction',
        'fonction_realisation',
        'fonction_dirige',
        'fonction_responsable',
        'fonction_candidat',
    ];
    foreach ($fonction_fields as $field) {
        $val = get_post_meta($post_id, $field, true);
        if ($val) {
            $data['fonction_label'] = thalim_bilingual( $val, $lang );
            break;
        }
    }

    // --- Autre fonction label (first non-empty autre_fonction_* field) ---
    $autre_fonction_fields = [
        'autre_fonction_autre',
        'autre_fonction_concerne',
        'autre_fonction_directeur',
        'autre_fonction_direction_d_ouvrage',
        'autre_fonction_intervenant',
        'autre_fonction_participants',
    ];
    foreach ($autre_fonction_fields as $field) {
        $val = get_post_meta($post_id, $field, true);
        if ($val) {
            $data['autre_fonction_label'] = thalim_bilingual( $val, $lang );
            break;
        }
    }

    // --- Fallback: derive labels from Pods categorie ID for older posts ---
    if (!$data['fonction_label'] || !$data['autre_fonction_label']) {
        $pods_cat = get_post_meta($post_id, '_pods_categorie', true);
        $cat_id   = (is_array($pods_cat) && !empty($pods_cat)) ? intval($pods_cat[0]) : 0;

        // Pods categorie ID → fonction label (main membres)
        $cat_to_fonction = [
            3  => 'Organisation',  4  => 'Auteur',      6  => 'Responsable',
            8  => 'Organisation',  9  => 'Responsable', 10 => 'Organisation',
            11 => 'Organisation', 12 => 'Intervention', 13 => 'Intervention',
            14 => 'Candidat',    15 => 'Auteur',       16 => 'Auteur',
            17 => 'Responsable', 18 => 'Organisation', 19 => 'Intervention',
            21 => 'Rédaction',   22 => 'Réalisation',  23 => 'Intervention',
            24 => 'Responsable', 25 => 'Responsable',  65 => 'Dirigé par',
        ];

        // Pods categorie ID → autre_fonction label (autre membres)
        $cat_to_autre_fonction = [
            3  => 'Participants',      4  => "Direction d'ouvrage",
            10 => 'Participants',     14 => 'Directeur de thèse',
            15 => "Direction d'ouvrage", 16 => "Direction d'ouvrage",
            19 => 'Membre concerné',  22 => 'Intervenant',
        ];

        if (!$data['fonction_label'] && isset($cat_to_fonction[$cat_id])) {
            $data['fonction_label'] = $cat_to_fonction[$cat_id];
        }
        if (!$data['autre_fonction_label'] && isset($cat_to_autre_fonction[$cat_id])) {
            $data['autre_fonction_label'] = $cat_to_autre_fonction[$cat_id];
        }
    }

    return $data;
}