<?php

//filtrar
add_action('wp_ajax_myfilter', 'filter_news'); // wp_ajax_{ACTION HERE}
add_action('wp_ajax_nopriv_myfilter', 'filter_news');

function filter_news() {
    // $args = array(
    //     'post_type' => 'post',
    //     'posts_per_page' => -1 ,
    //     'orderby' => 'date', // we will sort posts by date
    //     'order'  => $_POST['date'], // ASC or DESC
    //     'fields' => 'ids',
    // );


    $args1 = array(
        'fields' => 'ids',
        'tax_query' => array(
           array(
            'taxonomy' => 'category',
            'field' => 'id',
            'terms' => $_POST['areafilter'],
           ),
        ),
    );

    $query1 = new WP_Query( $args1 );

    $args2 = array(
        'fields' => 'ids',
        'tax_query' => array(
        array(
            'taxonomy' => 'post_tag',
            'field' => 'id',
            'terms' => $_POST['assuntofilter'],
           ),
        ),
    );

    $query2 = new WP_Query( $args2 );

    $args3 = array(
        'fields' => 'ids',
        'date_query' => array(
            array(
               'key' => 'mes',
               'month' => $_POST['mesfilter'],
            ),
        ),

    );

    $query3 = new WP_Query( $args3 );

    $args4 = array(
        'fields' => 'ids',
        'date_query' => array(
            array(
                //  'relation' => 'OR',
                'key' => 'ano',
                'year' => $_POST['anofilter'],
             ),
        ),

    );

    $query4 = new WP_Query( $args4 );

    $all_IDs = array_merge( $query4->posts );


    $final_query = new WP_Query( array( 'post__in' => $all_IDs ) );


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

           echo '<article id="post-'. $final_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();

}