// Meta Box Class: Woocommerce Product Update
class woocommerceproductupMetabox {

	private $screen = array(
		'product',
	);

	private $meta_fields = array(
		array(
			'label' => 'Recent updates for this product ?',
			'id' => 'woocommerce-update-product',
			'default' => 'Aujourdhui',
			'type' => 'date',
		),
	);

	public function __construct() {
		add_action( 'add_meta_boxes', array( $this, 'add_meta_boxes' ) );
		add_action( 'save_post', array( $this, 'save_fields' ) );
	}

	public function add_meta_boxes() {
		foreach ( $this->screen as $single_screen ) {
			add_meta_box(
				'woocommerceproductup',
				__( 'Woocommerce Product Update', 'textdomain' ),
				array( $this, 'meta_box_callback' ),
				$single_screen,
				'normal',
				'high'
			);
		}
	}

	public function meta_box_callback( $post ) {
		wp_nonce_field( 'woocommerceproductup_data', 'woocommerceproductup_nonce' );
		$this->field_generator( $post );
	}

	public function field_generator( $post ) {
		$output = '';
		foreach ( $this->meta_fields as $meta_field ) {
			$label = '<label for="' . $meta_field['id'] . '">' . $meta_field['label'] . '</label>';
			$meta_value = get_post_meta( $post->ID, $meta_field['id'], true );
			if ( empty( $meta_value ) ) {
				if ( isset( $meta_field['default'] ) ) {
					$meta_value = $meta_field['default'];
				}
			}
			switch ( $meta_field['type'] ) {
				default:
					$input = sprintf(
						'<input %s id="%s" name="%s" type="%s" value="%s">',
						$meta_field['type'] !== 'color' ? 'style="width: 100%"' : '',
						$meta_field['id'],
						$meta_field['id'],
						$meta_field['type'],
						$meta_value
					);
			}
			$output .= $this->format_rows( $label, $input );
		}
		echo '<table class="form-table"><tbody>' . $output . '</tbody></table>';
	}

	public function format_rows( $label, $input ) {
		return '<tr><th>'.$label.'</th><td>'.$input.'</td></tr>';
	}

	public function save_fields( $post_id ) {
		if ( ! isset( $_POST['woocommerceproductup_nonce'] ) )
			return $post_id;
		$nonce = $_POST['woocommerceproductup_nonce'];
		if ( !wp_verify_nonce( $nonce, 'woocommerceproductup_data' ) )
			return $post_id;
		if ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE )
			return $post_id;
		foreach ( $this->meta_fields as $meta_field ) {
			if ( isset( $_POST[ $meta_field['id'] ] ) ) {
				switch ( $meta_field['type'] ) {
					case 'email':
						$_POST[ $meta_field['id'] ] = sanitize_email( $_POST[ $meta_field['id'] ] );
						break;
					case 'text':
						$_POST[ $meta_field['id'] ] = sanitize_text_field( $_POST[ $meta_field['id'] ] );
						break;
				}
				update_post_meta( $post_id, $meta_field['id'], $_POST[ $meta_field['id'] ] );
			} else if ( $meta_field['type'] === 'checkbox' ) {
				update_post_meta( $post_id, $meta_field['id'], '0' );
			}
		}
	}
}

if (class_exists('woocommerceproductupMetabox')) {
	new woocommerceproductupMetabox;
};

add_action( 'woocommerce_before_shop_loop_item_title', 'themespress_field_display_below_title', 2 );
function themespress_field_display_below_title(){
    global $product;
    // Get the custom field value
    $custom_field = get_post_meta( $product->get_id(), 'woocommerce-update-product', true );
    // Display
    if( ! empty($custom_field) ){
        echo '<p class="last-updates" style="position:absolute;top:30px;background:#f95b26;color:white;padding:2px 5px">' . 'MAJ : ' . (new DateTime($custom_field))->format('d M Y') . '</p>';
    }
}

add_action( 'woocommerce_before_shop_loop_item_title', 'themespressdeux_field_display_below_title', 2 );
function themespressdeux_field_display_below_title(){
    global $product;
    // Get the custom field value
    $custom_field = get_post_meta( $product->get_id(), 'woocommerce-update-product', true );
    // Display
	$now = time(); // Current time 
	$your_date = strtotime($custom_field); // The first date
	$datediff = abs($now - $your_date); // Gives absolute Value
    if( ! empty($custom_field) ){ 
		echo '<p class="last-updates" style="position:absolute;top:30px;background:#f95b26;color:white;padding:2px 5px">' . 'MAJ : ' . floor($datediff/(60*60*24)) . '&nbsp;jour(s)' . '</p>';
    }
}

add_action( 'woocommerce_before_single_product_summary' , 'themespress_updates_date_before_product_title', 5 );
function themespress_updates_date_before_product_title() {
    global $product;
    // Get the custom field value
    $custom_field = get_post_meta( $product->get_id(), 'woocommerce-update-product', true );
    // Display
	$now = time(); // Current time 
	$your_date = strtotime($custom_field); // The first date
	$datediff = abs($now - $your_date); // Gives absolute Value
    if( ! empty($custom_field) ){ 
		echo '<p class="last-updates" style="position:absolute;top:-40px;right:0;background:#f95b26;color:white;padding:2px 5px">' . 'MAJ : ' . floor($datediff/(60*60*24)) . '&nbsp;jour(s)' . '</p>';
    }
}