<?php
$context = Timber::context();

$excluded_cat_ids = [12, 31]; // Séance de séminaire, Non classé
if ( ! is_user_logged_in() ) $excluded_cat_ids[] = 9; // Vie du labo

// Read filter query params
$active_axe       = isset($_GET['axe'])        ? intval($_GET['axe'])                    : 0;
$active_date_from = isset($_GET['date_from'])  ? sanitize_text_field($_GET['date_from']) : '';
$active_date_to   = isset($_GET['date_to'])    ? sanitize_text_field($_GET['date_to'])   : '';
$active_cat_id    = isset($_GET['filter_cat'])    ? intval($_GET['filter_cat'])             : 0;
$filter_autres    = isset($_GET['filter_autres']) ? 1                                    : 0;

$context['active_axe']         = $active_axe;
$context['active_date_from']   = $active_date_from;
$context['active_date_to']     = $active_date_to;
$context['active_category_id'] = $filter_autres ? 'autres' : $active_cat_id;
$context['active_cat_id']      = $active_cat_id;
$context['filter_autres']      = $filter_autres;

// Redirect ?filter_cat=X to the actual category page (preserving axe/date params)
if ( $active_cat_id && ! $filter_autres ) {
    $cat_obj = get_category( $active_cat_id );
    if ( $cat_obj && ! is_wp_error( $cat_obj ) ) {
        $redir_params = array_filter([
            'axe'       => $active_axe       ?: null,
            'date_from' => $active_date_from ?: null,
            'date_to'   => $active_date_to   ?: null,
        ]);
        $redir_url = $redir_params
            ? add_query_arg( $redir_params, get_category_link( $cat_obj->term_id ) )
            : get_category_link( $cat_obj->term_id );
        wp_redirect( $redir_url, 301 );
        exit;
    }
}

// Determine active rubrique
$active_rubrique_id = 0;
if ($active_cat_id) {
    $active_cat_obj     = get_category($active_cat_id);
    $active_rubrique_id = ($active_cat_obj && $active_cat_obj->parent)
        ? $active_cat_obj->parent
        : $active_cat_id;
}
$context['active_rubrique'] = $active_rubrique_id;

// Base filter params preserved across all filter links
$base_filter_params = array_filter([
    'axe'       => $active_axe ?: null,
    'date_from' => $active_date_from ?: null,
    'date_to'   => $active_date_to ?: null,
]);

// Build tax_query: exclude séances + optional category filter
$tax_query = [
    'relation' => 'AND',
    [
        'taxonomy' => 'category',
        'field'    => 'term_id',
        'terms'    => $excluded_cat_ids,
        'operator' => 'NOT IN',
    ],
];
if ($active_cat_id) {
    $tax_query[] = [
        'taxonomy'         => 'category',
        'field'            => 'term_id',
        'terms'            => [$active_cat_id],
        'include_children' => !$filter_autres,
    ];
}

$query_args = [
    'post_type'               => 'post',
    'posts_per_page'          => 12,
    'orderby'                 => 'date',
    'order'                   => 'DESC',
    'lang'                    => '',
    'tax_query'               => $tax_query,
    'thalim_event_date_order' => true,
];
if ($active_axe) {
    $query_args['meta_query'] = [[
        'key'   => 'axes_thematiques',
        'value' => $active_axe,
        'type'  => 'NUMERIC',
    ]];
}
if ($active_date_from || $active_date_to) {
    $query_args['thalim_event_date_filter'] = ['from' => $active_date_from, 'to' => $active_date_to];
}

// Axes thématiques for filter dropdown
$axes_groups = thalim_get_axes_filter_groups();
$current_axes = $axes_groups[0]['terms'] ?? [];
$context['filter_axes'] = $current_axes;

// Rubrique/catégorie filter links (stay on this page with filter_cat param)
$page_url = get_permalink();
$all_cats  = get_categories(['taxonomy' => 'category', 'hide_empty' => false, 'exclude' => $excluded_cat_ids]);

$filter_parents = [];
foreach ($all_cats as $cat) {
    if ($cat->parent == 0) {
        $filter_parents[] = [
            'id'   => $cat->term_id,
            'name' => thalim_cat_name($cat),
            'slug' => $cat->slug,
            'link' => $base_filter_params
                ? add_query_arg($base_filter_params, get_category_link($cat->term_id))
                : get_category_link($cat->term_id),
        ];
    }
}
$context['filter_parents'] = $filter_parents;

$filter_categories = [];
if ($active_rubrique_id) {
    foreach ($all_cats as $cat) {
        if ($cat->parent == $active_rubrique_id) {
            $filter_categories[] = [
                'id'   => $cat->term_id,
                'name' => thalim_cat_name($cat),
                'slug' => $cat->slug,
                'link' => $base_filter_params
                    ? add_query_arg($base_filter_params, get_category_link($cat->term_id))
                    : get_category_link($cat->term_id),
            ];
        }
    }
}
// Add "Autres" entry if active rubrique has posts directly assigned to it
if ($active_rubrique_id && !empty($filter_categories)) {
    $lang = thalim_current_language();
    $direct_check = new WP_Query([
        'post_type'      => 'post',
        'posts_per_page' => 1,
        'fields'         => 'ids',
        'no_found_rows'  => true,
        'lang'           => '',
        'tax_query'      => [[
            'taxonomy'         => 'category',
            'field'            => 'term_id',
            'terms'            => [$active_rubrique_id],
            'include_children' => false,
        ]],
    ]);
    if ($direct_check->have_posts()) {
        $params = array_filter(array_merge($base_filter_params, ['filter_cat' => $active_rubrique_id, 'filter_autres' => 1]));
        $filter_categories[] = [
            'id'   => 'autres',
            'name' => $lang === 'en' ? 'Other' : 'Autres',
            'slug' => 'autres',
            'link' => add_query_arg($params, $page_url),
        ];
    }
}
$context['filter_categories'] = $filter_categories;

$posts = Timber::get_posts($query_args);
$context['cards'] = thalim_get_cards_data($posts);
$context['posts'] = $posts;

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