<?php

// Filtro de Noticias
add_action( 'wp_ajax_myfilter', 'ajax_filter_news' );
add_action( 'wp_ajax_nopriv_myfilter', 'ajax_filter_news' );

function ajax_filter_news() {
    // Inicializando
    $date_filter = [];
    $tax_query = [ 'relation' => 'AND' ];

    // Filtro de Categoria
    if ( ! empty( $_POST['areafilter'] ) ) {
        $tax_query[] = array(
            'taxonomy'  => 'category',
            'field'     => 'id',
            'terms'     => sanitize_text_field( $_POST['areafilter'] ),
        );
    }

    // Filtro de Tag
    if ( ! empty( $_POST['assuntofilter'] ) ) {
        $tax_query[] = array(
            'taxonomy'  => 'post_tag',
            'field'     => 'id',
            'terms'     => sanitize_text_field( $_POST['assuntofilter'] ),
        );
    }

    // Filtro do Mês
    $month = ( empty( $_POST['mesfilter'] ) ) ? 0 : sanitize_text_field( $_POST['mesfilter'] );
    if ( $month => 1 && $month <= 12 ) {
        $date_filter['month'] = $month;
    }

    // Filtro do Ano
    $year = ( empty( $_POST['anofilter'] ) ) ? 0 : sanitize_text_field( $_POST['anofilter'] );
    if ( $year => 1000 && $year <= 9999 ) {
        $date_filter['year'] = $year;
    }

    // Order
    $order = 'DESC';
    if ( ! empty( $_POST['date'] ) && strtoupper( sanitize_text_field( $_POST['date'] ) ) === 'ASC' ) {
        $order = 'ASC';
    }

    // Argumentos
    $args = array(
        'post_type'      => 'post',
        'posts_per_page' => -1,
        'orderby'        => 'date',
        'order'          => $order,
    );

    if ( count( $tax_query ) > 1 ) {
        $args['tax_query'] = $tax_query;
    }

    if ( ! empty( $date_filter ) ) {
        $args['date_query'] = [ $date_filter ];
    }

    // A Query
    $query = new WP_Query( $args );

    if (  $query->have_posts() ) :
        while( $query->have_posts() ):  $query->the_post();

           echo '<article id="post-'. $query->post->ID.'"  class="post-default ajax"> ';
           echo '<a href="'.get_the_permalink().'">';
           echo '<img src="'.get_the_post_thumbnail_url().'" />';
           echo '</a>';
           echo '<div class="post-default__meta post-meta">';
                    echo'<div class="post-meta__column">';
                         echo'<span class="post-meta__date">'.get_the_date().'</span>';
                    echo'</div>';
            echo'</div>';
            echo '<h2 class="h1"><a href="'.get_the_permalink().'">'.get_the_title().'</a></h2>';
            echo '<p>'.the_excerpt().'</p>';
            echo '<div class="post-default__footer post-footer">
                    <div class="post-footer__column" style="width: 42% !important;"> Área:';
            echo      '<p><span>'.the_category('Assunto:', '<br />').'</span>
                       <span> '.the_tags( ' / Assunto: ', '<br />').'</span></p>';
            echo       '<a href="'.get_the_permalink().'">saiba mais</a>
                    </div>';
            echo    '<div class="post-footer__column">
                       <span class="post-footer__comments">'.comments_number( '(0) Comentários', '(1) Comentário', '(%) Comentários' ).'</span>
                    </div>';
           echo '</article>';

        endwhile;

        wp_reset_postdata();
    else :
        echo '<h1> Nenhuma notícia encontrada </h1>';
    endif;

    die();
}