<?php
/**
 * Render del filtro por taxonomía (o por autor, con la taxonomía especial
 * FilterWell::AUTHOR: cada autor se trata como un término).
 *
 * @var array    $attributes
 * @var WP_Block $block
 */

defined( 'ABSPATH' ) || exit;

// Todo el render va dentro de una función para que sus variables sean locales
// y no globales (el archivo se incluye con $attributes, $content y $block).
( static function ( $attributes, $content, $block ) {

$qlf_taxonomy  = $attributes['taxonomy'] ?? 'category';
$qlf_is_author = FilterWell::AUTHOR === $qlf_taxonomy;
if ( ! isset( $block->context['filterwell/queryId'] ) || ( ! $qlf_is_author && ! taxonomy_exists( $qlf_taxonomy ) ) ) {
	return;
}

$qlf_post_type    = $block->context['filterwell/postType'] ?? 'post';
$qlf_hierarchical = ! $qlf_is_author && get_taxonomy( $qlf_taxonomy )->hierarchical;
$qlf_display    = in_array( $attributes['displayType'] ?? '', array( 'checkbox', 'radio', 'select', 'tags' ), true ) ? $attributes['displayType'] : 'checkbox';
// Las etiquetas son opción única (radio) o, si se permite, varias (casillas).
$qlf_input      = 'tags' === $qlf_display ? ( empty( $attributes['multiple'] ) ? 'radio' : 'checkbox' ) : $qlf_display;
// Un contenido tiene un solo autor: con autores la lógica siempre es "cualquiera".
$qlf_logic      = ! $qlf_is_author && 'checkbox' === $qlf_input && 'and' === ( $attributes['logic'] ?? 'or' ) ? 'and' : 'or';
$qlf_show_count = ! empty( $attributes['showCounts'] );
$qlf_hide_empty = ! empty( $attributes['hideEmpty'] );
$qlf_order_by   = 'count' === ( $attributes['orderBy'] ?? 'name' ) ? 'count' : 'name';
$qlf_title      = ! empty( $attributes['label'] ) ? $attributes['label'] : ( $qlf_is_author ? __( 'Author', 'filterwell' ) : get_taxonomy( $qlf_taxonomy )->labels->name );
$qlf_all_label  = FilterWell::text( $attributes, 'allLabel', $qlf_is_author ? _x( 'All', 'all authors', 'filterwell' ) : __( 'All', 'filterwell' ) );

$qlf_prefix   = FilterWell::prefix( $block->context['filterwell/queryId'], ! empty( $block->context['filterwell/inherit'] ) );

// Términos a mostrar (solo en taxonomías jerárquicas): todos, solo los
// principales o las subcategorías del término elegido (dos filas de
// categorías). Las dos últimas son de opción única.
$qlf_scope = $qlf_hierarchical && in_array( $attributes['termsScope'] ?? 'all', array( 'top', 'children' ), true ) ? $attributes['termsScope'] : 'all';

// En el archivo de esta taxonomía (p. ej. /category/diseno/) el filtro es de
// opción única y cada opción lleva a la URL de archivo de su término.
$qlf_archive = FilterWell::archive_term_for( $qlf_taxonomy, $qlf_prefix );
if ( $qlf_archive || 'all' !== $qlf_scope ) {
	$qlf_input = 'select' === $qlf_display ? 'select' : 'radio';
	$qlf_logic = 'or';
}

// Categoría madre de la fila de subcategorías (se define más abajo).
$qlf_root     = null;
$qlf_all_url  = $qlf_archive ? FilterWell::all_items_url( $qlf_post_type ) : '';
$qlf_term_url = function ( $term ) use ( $qlf_archive, &$qlf_all_url ) {
	if ( ! $qlf_archive ) {
		return '';
	}
	$url = $term ? FilterWell::term_url( $term ) : $qlf_all_url;
	return $url ? $url : '';
};
$qlf_param    = FilterWell::tax_param( $qlf_prefix, $qlf_taxonomy, $qlf_logic );
$qlf_request  = FilterWell::get_request( $qlf_prefix );
$qlf_selected = $qlf_request['tax'][ $qlf_taxonomy ]['terms'] ?? array();

if ( $qlf_is_author ) {
	// Autores con contenidos publicados del tipo del bucle.
	$qlf_users = get_users(
		array(
			'has_published_posts' => array( $qlf_post_type ),
			'orderby'             => 'count' === $qlf_order_by ? 'post_count' : 'display_name',
			'order'               => 'count' === $qlf_order_by ? 'DESC' : 'ASC',
		)
	);
	$qlf_terms = array_map( array( 'FilterWell', 'author_as_term' ), $qlf_users );
} else {
	$qlf_terms = get_terms(
		array(
			'taxonomy'   => $qlf_taxonomy,
			'hide_empty' => false,
			'orderby'    => $qlf_order_by,
			'order'      => 'count' === $qlf_order_by ? 'DESC' : 'ASC',
		)
	);
	if ( is_wp_error( $qlf_terms ) ) {
		return;
	}
}

// Valor de la opción "Todas": sin filtro, salvo en la fila de subcategorías,
// donde "Todas" es la categoría madre.
$qlf_all_value = '';
// Fila de subcategorías sin nada que mostrar: se dibuja vacía y oculta, para
// que el router tenga dónde ponerla cuando se elija una categoría.
$qlf_empty_row = false;

if ( 'all' !== $qlf_scope ) {
	// El término elegido (por el archivo o la URL) y su categoría raíz.
	$qlf_current = $qlf_selected ? get_term_by( 'slug', $qlf_selected[0], $qlf_taxonomy ) : null;
	$qlf_lineage = $qlf_current ? array_reverse( get_ancestors( $qlf_current->term_id, $qlf_taxonomy, 'taxonomy' ) ) : array();
	if ( $qlf_current ) {
		$qlf_lineage[] = $qlf_current->term_id;
	}
	$qlf_root_id = $qlf_lineage ? $qlf_lineage[0] : 0;

	if ( 'top' === $qlf_scope ) {
		$qlf_terms    = array_values( wp_list_filter( $qlf_terms, array( 'parent' => 0 ) ) );
		$qlf_root     = $qlf_root_id ? get_term( $qlf_root_id, $qlf_taxonomy ) : null;
		$qlf_selected = $qlf_root instanceof WP_Term ? array( $qlf_root->slug ) : array();
	} else {
		// Sin categoría elegida, o si no tiene subcategorías, la fila no se muestra.
		$qlf_root  = $qlf_root_id ? get_term( $qlf_root_id, $qlf_taxonomy ) : null;
		$qlf_terms     = $qlf_root instanceof WP_Term ? array_values( wp_list_filter( $qlf_terms, array( 'parent' => $qlf_root_id ) ) ) : array();
		$qlf_empty_row = ! $qlf_terms;
		// Elegida la raíz: "Todas"; elegida una subcategoría (o una más profunda): su rama.
		$qlf_branch   = isset( $qlf_lineage[1] ) ? get_term( $qlf_lineage[1], $qlf_taxonomy ) : null;
		$qlf_selected = $qlf_branch instanceof WP_Term ? array( $qlf_branch->slug ) : array();
		$qlf_all_value = $qlf_empty_row ? '' : $qlf_root->slug;
		$qlf_all_url   = $qlf_archive && ! $qlf_empty_row ? FilterWell::term_url( $qlf_root ) : '';
	}
}

// Ordena jerárquicamente: cada hijo justo después de su padre.
if ( $qlf_hierarchical ) {
	$qlf_by_parent = array();
	$qlf_ids       = wp_list_pluck( $qlf_terms, 'term_id' );
	foreach ( $qlf_terms as $qlf_term ) {
		$qlf_parent                     = in_array( $qlf_term->parent, $qlf_ids, true ) ? $qlf_term->parent : 0;
		$qlf_by_parent[ $qlf_parent ][] = $qlf_term;
	}
	$qlf_sorted = array();
	$qlf_visit  = function ( $parent, $depth ) use ( &$qlf_visit, &$qlf_sorted, $qlf_by_parent ) {
		foreach ( $qlf_by_parent[ $parent ] ?? array() as $term ) {
			$term->qlf_depth = $depth;
			$qlf_sorted[]    = $term;
			$qlf_visit( $term->term_id, $depth + 1 );
		}
	};
	$qlf_visit( 0, 0 );
	$qlf_terms = $qlf_sorted;
}

// Conteos según los demás filtros activos (como hace WooCommerce).
$qlf_counts   = $qlf_show_count || $qlf_hide_empty ? FilterWell::term_counts( $qlf_taxonomy, $block->context ) : array();
$qlf_is_empty = function ( $term ) use ( $qlf_hide_empty, $qlf_counts, $qlf_selected ) {
	return $qlf_hide_empty && empty( $qlf_counts[ $term->term_id ] ) && ! in_array( $term->slug, $qlf_selected, true );
};

// Región del router: al filtrar se reemplaza con los conteos y opciones actualizados.
$qlf_arrows  = 'tags' === $qlf_display && ( $attributes['tagsArrows'] ?? true );
// Tamaño de las flechas: solo valores simples en px, em o rem.
$qlf_arrow_size = preg_match( '/^\d+(\.\d+)?(px|em|rem)$/', (string) ( $attributes['tagsArrowSize'] ?? '' ) ) ? $attributes['tagsArrowSize'] : '';

$qlf_classes = array( 'is-style-' . $qlf_display );
if ( 'tags' === $qlf_display ) {
	$qlf_classes[] = 'is-scroll-' . ( 'mobile' === ( $attributes['tagsScroll'] ?? 'always' ) ? 'mobile' : 'always' );
	$qlf_classes[] = 'is-justify-' . ( in_array( $attributes['tagsJustify'] ?? 'left', array( 'center', 'right' ), true ) ? $attributes['tagsJustify'] : 'left' );
}

$qlf_wrapper_args = array(
	'class'                 => implode( ' ', $qlf_classes ),
	'style'                 => FilterWell::option_color_style( $attributes ),
	'data-wp-interactive'   => 'filterwell',
	'data-wp-router-region' => FilterWell::region_id( 'qlf-tax-' . $qlf_param ),
);
// Las etiquetas filtran al instante, como una navegación.
if ( 'tags' === $qlf_display ) {
	$qlf_wrapper_args['data-qlf-instant'] = 'true';
}
$qlf_wrapper = get_block_wrapper_attributes( $qlf_wrapper_args );

if ( $qlf_empty_row ) {
	echo '<fieldset ' . wp_kses_data( $qlf_wrapper ) . ' hidden></fieldset>';
	return;
}
?>
<fieldset <?php echo wp_kses_data( $qlf_wrapper ); ?>>
	<legend class="qlf-screen-reader-text"><?php echo esc_html( $qlf_title ); ?></legend>
	<?php
	if ( ! empty( $attributes['showLabel'] ) ) {
		echo wp_kses_post( FilterWell::heading( $attributes['headingLevel'] ?? 3, esc_html( $qlf_title ), array( 'aria-hidden' => 'true' ) ) );
	}
	?>

	<?php if ( 'select' === $qlf_display ) : ?>
		<select class="qlf-terms__select" name="<?php echo esc_attr( $qlf_param ); ?>" aria-label="<?php echo esc_attr( $qlf_title ); ?>"<?php echo $qlf_archive ? ' data-qlf-archive' : ''; ?>>
			<option value="<?php echo esc_attr( $qlf_all_value ); ?>"<?php FilterWell::url_attr( $qlf_term_url( null ) ); ?> <?php selected( empty( $qlf_selected ) ); ?>><?php echo esc_html( $qlf_all_label ); ?></option>
			<?php foreach ( $qlf_terms as $qlf_term ) : ?>
				<option
					value="<?php echo esc_attr( $qlf_term->slug ); ?>"
					<?php FilterWell::url_attr( $qlf_term_url( $qlf_term ) ); ?>
					<?php selected( in_array( $qlf_term->slug, $qlf_selected, true ) ); ?>
					<?php echo $qlf_is_empty( $qlf_term ) ? 'hidden' : ''; ?>
				><?php echo esc_html( str_repeat( '— ', $qlf_term->qlf_depth ?? 0 ) . $qlf_term->name . ( $qlf_show_count ? ' (' . (int) ( $qlf_counts[ $qlf_term->term_id ] ?? 0 ) . ')' : '' ) ); ?></option>
			<?php endforeach; ?>
		</select>
	<?php else : ?>
		<?php if ( 'tags' === $qlf_display ) : ?>
			<div
				class="qlf-tags<?php echo $qlf_arrows ? ' has-arrows' : ''; ?>"
				<?php echo $qlf_arrow_size ? 'style="--qlf-arrow-size:' . esc_attr( $qlf_arrow_size ) . '"' : ''; ?>
				data-wp-context='{"canPrev":false,"canNext":false}'
				data-wp-class--can-scroll-prev="context.canPrev"
				data-wp-class--can-scroll-next="context.canNext"
				data-wp-init="callbacks.initTags"
				data-wp-watch="callbacks.updateTags"
			>
			<?php if ( $qlf_arrows ) : ?>
				<?php // Solo para el mouse: con teclado, el foco ya desplaza la fila. ?>
				<button type="button" class="qlf-tags__arrow is-prev" tabindex="-1" aria-hidden="true" data-wp-on--click="actions.scrollTagsPrev">
					<svg viewBox="0 0 24 24" width="24" height="24" aria-hidden="true" focusable="false"><path d="M10.6 6 9.4 7l4.6 5-4.6 5 1.2 1 5.4-6z" fill="currentColor"/></svg>
				</button>
			<?php endif; ?>
		<?php endif; ?>
		<ul class="qlf-terms__list">
			<?php
			$qlf_options = $qlf_terms;
			if ( 'radio' === $qlf_input ) {
				array_unshift( $qlf_options, null ); // Opción "Todas".
			}
			foreach ( $qlf_options as $qlf_term ) :
				$qlf_is_all = null === $qlf_term;
				$qlf_value  = $qlf_is_all ? $qlf_all_value : $qlf_term->slug;
				$qlf_check  = $qlf_is_all ? empty( $qlf_selected ) : in_array( $qlf_term->slug, $qlf_selected, true );
				$qlf_depth  = $qlf_is_all ? 0 : (int) ( $qlf_term->qlf_depth ?? 0 );
				$qlf_hidden = ! $qlf_is_all && $qlf_is_empty( $qlf_term );
				?>
				<li class="qlf-terms__item" style="--qlf-depth:<?php echo (int) $qlf_depth; ?>"<?php echo $qlf_hidden ? ' hidden' : ''; ?>>
					<label class="qlf-terms__label">
						<span class="qlf-terms__control">
							<input
								class="qlf-terms__input"
								type="<?php echo esc_attr( $qlf_input ); ?>"
								name="<?php echo esc_attr( $qlf_param . ( 'checkbox' === $qlf_input ? '[]' : '' ) ); ?>"
								value="<?php echo esc_attr( $qlf_value ); ?>"
								<?php echo $qlf_archive ? 'data-qlf-archive' : ''; ?>
								<?php FilterWell::url_attr( $qlf_term_url( $qlf_term ) ); ?>
								<?php checked( $qlf_check ); ?>
							/>
							<?php if ( 'radio' === $qlf_input ) : ?>
								<svg class="qlf-terms__mark" viewBox="0 0 10 10" aria-hidden="true"><circle cx="5" cy="5" r="3" fill="currentColor"/></svg>
							<?php else : ?>
								<svg class="qlf-terms__mark" viewBox="0 0 10 8" fill="none" aria-hidden="true"><path d="M9.25 1.19922L3.75 6.69922L1 3.94922" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"/></svg>
							<?php endif; ?>
						</span>
						<span class="qlf-terms__text">
							<span class="qlf-terms__name"><?php echo esc_html( $qlf_is_all ? $qlf_all_label : $qlf_term->name ); ?></span>
							<?php if ( $qlf_show_count && ! $qlf_is_all ) : ?>
								<span class="qlf-terms__count">(<?php echo (int) ( $qlf_counts[ $qlf_term->term_id ] ?? 0 ); ?>)</span>
							<?php endif; ?>
						</span>
					</label>
				</li>
			<?php endforeach; ?>
		</ul>
		<?php if ( 'tags' === $qlf_display ) : ?>
			<?php if ( $qlf_arrows ) : ?>
				<button type="button" class="qlf-tags__arrow is-next" tabindex="-1" aria-hidden="true" data-wp-on--click="actions.scrollTagsNext">
					<svg viewBox="0 0 24 24" width="24" height="24" aria-hidden="true" focusable="false"><path d="M10.6 6 9.4 7l4.6 5-4.6 5 1.2 1 5.4-6z" fill="currentColor"/></svg>
				</button>
			<?php endif; ?>
			</div>
		<?php endif; ?>
	<?php endif; ?>
</fieldset>
<?php
} )( $attributes, $content, $block );