<?php
$context = Timber::context();
$post    = Timber::get_post();
$context['post'] = $post;
$page_id = $post->ID;

// ── Liens (internal page links) ──────────────────────────────
$lien_ids = get_post_meta( $page_id, 'liens', false );
$liens    = [];
foreach ( $lien_ids as $lid ) {
    $lid = intval( $lid );
    if ( ! $lid ) continue;
    $liens[] = [
        'title' => get_the_title( $lid ),
        'url'   => get_permalink( $lid ),
    ];
}
$context['liens'] = $liens;

$labo_lang  = thalim_current_language();

// ── Images (two side-by-side slots) ──────────────────────────
$images = [];
foreach ( [ 'image_labo_1', 'image_labo_2' ] as $field ) {
    $img_id = intval( get_post_meta( $page_id, $field, true ) );
    if ( ! $img_id ) continue;
    $src = wp_get_attachment_image_url( $img_id, 'large' );
    if ( ! $src ) continue;
    $images[] = [
        'url'   => $src,
        'alt'   => get_post_meta( $img_id, '_wp_attachment_image_alt', true ) ?: '',
        'title' => thalim_bilingual( get_the_title( $img_id ), $labo_lang ),
    ];
}
$context['images'] = $images;

// ── Axes thématiques grouped by period ───────────────────────
$terms      = get_terms( [ 'taxonomy' => 'axe_thematique', 'hide_empty' => false ] );
$axes_map   = [];

$label_prefix  = $labo_lang === 'en' ? 'Research areas ' : 'Axes thématiques ';
$label_passes  = $labo_lang === 'en' ? 'Past research areas' : 'Axes thématiques antérieurs';

foreach ( $terms as $term ) {
    $debut = trim( get_term_meta( $term->term_id, 'annee_debut', true ) );
    $fin   = trim( get_term_meta( $term->term_id, 'annee_fin',   true ) );

    if ( $debut && $fin ) {
        $key   = $debut . '-' . $fin;
        $label = $label_prefix . $debut . ' – ' . $fin;
    } else {
        $key   = 'passes';
        $label = $label_passes;
    }

    if ( ! isset( $axes_map[ $key ] ) ) {
        $axes_map[ $key ] = [
            'label' => $label,
            'debut' => intval( $debut ),
            'terms' => [],
        ];
    }
    $ordre = trim( get_term_meta( $term->term_id, 'ordre_daffichage', true ) );
    $axes_map[ $key ]['terms'][] = [
        'name'   => $term->name,
        'url'    => get_term_link( $term ),
        'ordre'  => $ordre !== '' ? intval( $ordre ) : null,
    ];
}

// Sort: newest first by annee_debut, 'passes' always last (debut === 0)
uasort( $axes_map, function ( $a, $b ) {
    if ( $a['debut'] === 0 ) return 1;
    if ( $b['debut'] === 0 ) return -1;
    return $b['debut'] - $a['debut'];
} );

// Within each group: numbered items first (ascending), then unnumbered alphabetically
foreach ( $axes_map as &$group ) {
    usort( $group['terms'], function ( $a, $b ) {
        $a_has = $a['ordre'] !== null;
        $b_has = $b['ordre'] !== null;
        if ( $a_has && $b_has ) return $a['ordre'] - $b['ordre'];
        if ( $a_has ) return -1;
        if ( $b_has ) return 1;
        return strcmp( $a['name'], $b['name'] );
    } );
}
unset( $group );

$context['axes_groups'] = array_values( $axes_map );

// ── Body (English override) ──────────────────────────────────
$context['body_en'] = apply_filters( 'the_content', get_post_meta( $page_id, 'body_en', true ) ?: '' );

// ── WYSIWYG fields ────────────────────────────────────────────
$context['partenaires_internationaux'] = wpautop( ( $labo_lang === 'en' && get_post_meta( $page_id, 'partenaires_internationaux_en', true ) )
    ? get_post_meta( $page_id, 'partenaires_internationaux_en', true )
    : ( get_post_meta( $page_id, 'partenaires_internationaux', true ) ?: '' ) );
$context['partenaires_nationaux']      = wpautop( ( $labo_lang === 'en' && get_post_meta( $page_id, 'partenaires_nationaux_en', true ) )
    ? get_post_meta( $page_id, 'partenaires_nationaux_en', true )
    : ( get_post_meta( $page_id, 'partenaires_nationaux', true ) ?: '' ) );
$context['bibliotheques']              = wpautop( ( $labo_lang === 'en' && get_post_meta( $page_id, 'bibliotheques_en', true ) )
    ? get_post_meta( $page_id, 'bibliotheques_en', true )
    : ( get_post_meta( $page_id, 'bibliotheques', true ) ?: '' ) );

// ── Edit link ─────────────────────────────────────────────────
$context['page_edit_link'] = current_user_can( 'edit_page', $page_id ) ? get_edit_post_link( $page_id ) : '';

Timber::render( 'page-le-laboratoire.twig', $context );