<?php
$context = Timber::context();
$category = get_queried_object();
$context['category'] = Timber::get_term($category);
$context['cards'] = [];

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

// Parent category slug for color theming
if ($category->parent) {
    $parent_cat = get_category($category->parent);
    $context['parent_slug'] = $parent_cat->slug;
    $context['active_rubrique'] = $parent_cat->term_id;
} else {
    $context['parent_slug'] = $category->slug;
    $context['active_rubrique'] = $category->term_id;
}

// 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']) : '';

$context['active_axe'] = $active_axe;
$context['active_date_from'] = $active_date_from;
$context['active_date_to'] = $active_date_to;

// Build query param string to preserve across filter links
$filter_query = http_build_query(array_filter([
    'axe'       => $active_axe ?: null,
    'date_from' => $active_date_from ?: null,
    'date_to'   => $active_date_to ?: null,
]));
$context['filter_query'] = $filter_query;

// Build extra query args for axe/date filtering
$extra_query_args = [];
if ($active_axe) {
    $extra_query_args['meta_query'] = [[
        'key'   => 'axes_thematiques',
        'value' => $active_axe,
        'type'  => 'NUMERIC',
    ]];
}
if ($active_date_from || $active_date_to) {
    $extra_query_args['thalim_event_date_filter'] = ['from' => $active_date_from, 'to' => $active_date_to];
}

// Build parent categories for filter bar (with links)
$all_cats = get_categories([
    'taxonomy'   => 'category',
    'hide_empty' => false,
    'exclude'    => $excluded_ids,
]);

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

// Children of active rubrique for catégorie filter (with links)
$active_rubrique_id = $context['active_rubrique'];
$is_direct = (bool) get_query_var('thalim_direct_posts');
$lang = thalim_current_language();

$filter_categories = [];
foreach ($all_cats as $cat) {
    if ($cat->parent == $active_rubrique_id) {
        $link = get_category_link($cat->term_id);
        if ($filter_query) $link .= '?' . $filter_query;
        $filter_categories[] = [
            'id'   => $cat->term_id,
            'name' => thalim_cat_name($cat),
            'slug' => $cat->slug,
            'link' => $link,
        ];
    }
}

// Add "Autres" entry if the active rubrique has posts directly assigned to it
if ($is_direct) {
    $has_direct_posts = true;
} else {
    $direct_check = new WP_Query([
        'post_type'      => 'post',
        'posts_per_page' => 1,
        'fields'         => 'ids',
        'no_found_rows'  => true,
        'lang'           => '',
        'tax_query'      => [[
            'taxonomy'         => 'category',
            'field'            => 'term_id',
            'terms'            => [$active_rubrique_id],
            'include_children' => false,
        ]],
    ]);
    $has_direct_posts = $direct_check->have_posts();
}
if ($has_direct_posts && !empty($filter_categories)) {
    $autres_link = trailingslashit(get_category_link($active_rubrique_id)) . 'autres/';
    if ($filter_query) $autres_link .= '?' . $filter_query;
    $filter_categories[] = [
        'id'   => 'autres',
        'name' => $lang === 'en' ? 'Other' : 'Autres',
        'slug' => 'autres',
        'link' => $autres_link,
    ];
}

$context['filter_categories']  = $filter_categories;
$context['active_category_id'] = $is_direct ? 'autres' : $category->term_id;

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

// Fetch posts for initial display
$children = get_categories([
    'parent'     => $category->term_id,
    'taxonomy'   => 'category',
    'hide_empty' => true,
    'exclude'    => $excluded_ids,
]);

// Ordre personnalisé des sous-catégories (term_id => position).
// Les termes absents du tableau sont placés en dernier (position 999).
$subcategory_order = [
    // Publications et productions (parent: 4)
    15 => 0,  // Ouvrages
    16 => 1,  // Articles
    65 => 2,  // Revues et collections
    17 => 3,  // Multimédia
    // Activités (parent: 3)
    11 => 0,  // Séminaires
    10 => 1,  // Colloques et journées d'études
    13 => 2,  // Communications
    14 => 3,  // Soutenances
];
usort($children, function($a, $b) use ($subcategory_order) {
    $pos_a = $subcategory_order[$a->term_id] ?? 999;
    $pos_b = $subcategory_order[$b->term_id] ?? 999;
    return $pos_a - $pos_b;
});

$context['category_id']             = $category->term_id;
$context['agenda_include_children'] = ( ! $is_direct && ! empty( $children ) ) ? 1 : 0;

// Helper: move pinned posts to the front (same logic as homepage diaporamas)
$sort_with_pinned = function ( $posts ) {
    $today  = date( 'Y-m-d' );
    $pinned = [];
    $normal = [];
    foreach ( $posts as $post ) {
        $epingle = get_post_meta( $post->ID, 'epingler_dans_la_categorie', true );
        $fin     = get_post_meta( $post->ID, 'date_de_fin_depinglage', true );
        $active  = $epingle == '1' && ( empty( $fin ) || $fin === '0000-00-00' || $fin >= $today );
        if ( $active ) { $pinned[] = $post; } else { $normal[] = $post; }
    }
    return array_merge( $pinned, $normal );
};

if (!$is_direct && !empty($children)) {
    $context['is_parent'] = true;
    $context['subcategories'] = [];

    foreach ($children as $child) {
        $query_args = array_merge([
            'post_type'               => 'post',
            'tax_query'               => [[
                'taxonomy'         => 'category',
                'field'            => 'term_id',
                'terms'            => [$child->term_id],
                'include_children' => false,
            ]],
            'posts_per_page'          => 3,
            'orderby'                 => 'date',
            'order'                   => 'DESC',
            'lang'                    => '',
            'thalim_event_date_order' => true,
        ], $extra_query_args);
        $posts = $sort_with_pinned( Timber::get_posts($query_args) );
        $context['cards'] += thalim_get_cards_data($posts);
        $context['subcategories'][] = [
            'term'  => Timber::get_term($child),
            'posts' => $posts,
        ];
    }

    // Fetch posts directly in the parent category (no child category assigned)
    if ($has_direct_posts) {
        $direct_query_args = array_merge([
            'post_type'               => 'post',
            'tax_query'               => [[
                'taxonomy'         => 'category',
                'field'            => 'term_id',
                'terms'            => [$category->term_id],
                'include_children' => false,
            ]],
            'posts_per_page'          => 3,
            'orderby'                 => 'date',
            'order'                   => 'DESC',
            'lang'                    => '',
            'thalim_event_date_order' => true,
        ], $extra_query_args);
        $direct_posts = $sort_with_pinned( Timber::get_posts($direct_query_args) );
        if (!empty($direct_posts)) {
            $context['cards'] += thalim_get_cards_data($direct_posts);
            $context['direct_posts'] = $direct_posts;
            $autres_link = trailingslashit(get_category_link($category->term_id)) . 'autres/';
            if ($filter_query) $autres_link .= '?' . $filter_query;
            $context['autres_link'] = $autres_link;
        }
    }
} else {
    $context['is_parent'] = false;
    $context['is_direct'] = $is_direct;
    $query_args = array_merge([
        'post_type'               => 'post',
        'tax_query'               => [[
            'taxonomy'         => 'category',
            'field'            => 'term_id',
            'terms'            => [$category->term_id],
            'include_children' => false,
        ]],
        'posts_per_page'          => 12,
        'orderby'                 => 'date',
        'order'                   => 'DESC',
        'lang'                    => '',
        'thalim_event_date_order' => true,
    ], $extra_query_args);
    $posts = $sort_with_pinned( Timber::get_posts($query_args) );
    $context['cards'] = thalim_get_cards_data($posts);
    $context['posts'] = $posts;
}

// View mode toggle (?view=agenda)
$view_mode = ( isset( $_GET['view'] ) && $_GET['view'] === 'agenda' ) ? 'agenda' : 'grid';
$context['view_mode'] = $view_mode;

// Toggle URL (used as href fallback on the button)
$toggle_base   = get_category_link( $category->term_id );
$toggle_params = array_filter([
    'axe'       => $active_axe       ?: null,
    'date_from' => $active_date_from ?: null,
    'date_to'   => $active_date_to   ?: null,
]);
if ( $view_mode === 'grid' ) {
    $toggle_params['view'] = 'agenda';
}
// When toggling back to grid we omit ?view entirely
$context['agenda_toggle_url'] = add_query_arg( $toggle_params, $toggle_base );

// Custom Pods presentation fields
$cat_lang    = thalim_current_language();
$pres_fr     = get_term_meta( $category->term_id, 'presentation', true ) ?: '';
$pres_en     = get_term_meta( $category->term_id, 'presentation_en', true ) ?: '';
$context['term_presentation'] = wpautop( ( $cat_lang === 'en' && $pres_en ) ? $pres_en : $pres_fr );

Timber::render('category.twig', $context);