public function coupons_widget() {
		?>
		<h4 class="section_title"><span><?php esc_html_e( 'Filter by coupon', 'woocommerce' ); ?></span></h4>
		<div class="section">
			<form method="GET">
				<div>
					<?php
					$used_coupons = $this->get_order_report_data(
						array(
							'data'         => array(
								'order_item_name' => array(
									'type'            => 'order_item',
									'order_item_type' => 'coupon',
									'function'        => '',
									'distinct'        => true,
									'name'            => 'order_item_name',
								),
							),
							'where'        => array(
								array(
									'key'      => 'order_item_type',
									'value'    => 'coupon',
									'operator' => '=',
								),
							),
							'query_type'   => 'get_col',
							'filter_range' => false,
						)
					);

					if ( ! empty( $used_coupons ) && is_array( $used_coupons ) ) :
						?>
						<select id="coupon_codes" name="coupon_codes" class="wc-enhanced-select" data-placeholder="<?php esc_attr_e( 'Choose coupons&hellip;', 'woocommerce' ); ?>" style="width:100%;">
							<option value=""><?php esc_html_e( 'All coupons', 'woocommerce' ); ?></option>
							<?php
							foreach ( $used_coupons as $coupon ) {
								echo '<option value="' . esc_attr( $coupon ) . '"' . wc_selected( $coupon, $this->coupon_codes ) . '>' . esc_html( $coupon ) . '</option>';
							}
							?>
						</select>
						<?php // @codingStandardsIgnoreStart ?>
						<button type="submit" class="submit button" value="<?php esc_attr_e( 'Show', 'woocommerce' ); ?>"><?php esc_html_e( 'Show', 'woocommerce' ); ?></button>
						<input type="hidden" name="range" value="<?php echo ( ! empty( $_GET['range'] ) ) ? esc_attr( wp_unslash( $_GET['range'] ) ) : ''; ?>" />
						<input type="hidden" name="start_date" value="<?php echo ( ! empty( $_GET['start_date'] ) ) ? esc_attr( wp_unslash( $_GET['start_date'] ) ) : ''; ?>" />
						<input type="hidden" name="end_date" value="<?php echo ( ! empty( $_GET['end_date'] ) ) ? esc_attr( wp_unslash( $_GET['end_date'] ) ) : ''; ?>" />
						<input type="hidden" name="page" value="<?php echo ( ! empty( $_GET['page'] ) ) ? esc_attr( wp_unslash( $_GET['page'] ) ) : ''; ?>" />
						<input type="hidden" name="tab" value="<?php echo ( ! empty( $_GET['tab'] ) ) ? esc_attr( wp_unslash( $_GET['tab'] ) ) : ''; ?>" />
						<input type="hidden" name="report" value="<?php echo ( ! empty( $_GET['report'] ) ) ? esc_attr( wp_unslash( $_GET['report'] ) ) : ''; ?>" />
						<?php // @codingStandardsIgnoreEnd ?>
					<?php else : ?>
						<span><?php esc_html_e( 'No used coupons found', 'woocommerce' ); ?></span>
					<?php endif; ?>
				</div>
			</form>
		</div>
		<h4 class="section_title"><span><?php esc_html_e( 'Most popular', 'woocommerce' ); ?></span></h4>
		<div class="section">
			<table cellspacing="0">
				<?php
				$most_popular = $this->get_order_report_data(
					array(
						'data'         => array(
							'order_item_name' => array(
								'type'            => 'order_item',
								'order_item_type' => 'coupon',
								'function'        => '',
								'name'            => 'coupon_code',
							),
							'order_item_id'   => array(
								'type'            => 'order_item',
								'order_item_type' => 'coupon',
								'function'        => 'COUNT',
								'name'            => 'coupon_count',
							),
						),
						'where'        => array(
							array(
								'type'     => 'order_item',
								'key'      => 'order_item_type',
								'value'    => 'coupon',
								'operator' => '=',
							),
						),
						'order_by'     => 'coupon_count DESC',
						'group_by'     => 'order_item_name',
						'limit'        => 12,
						'query_type'   => 'get_results',
						'filter_range' => true,
					)
				);

				if ( ! empty( $most_popular ) && is_array( $most_popular ) ) {
					foreach ( $most_popular as $coupon ) {
						echo '<tr class="' . ( in_array( $coupon->coupon_code, $this->coupon_codes ) ? 'active' : '' ) . '">
							<td class="count" width="1%">' . esc_html( $coupon->coupon_count ) . '</td>
							<td class="name"><a href="' . esc_url( add_query_arg( 'coupon_codes', $coupon->coupon_code ) ) . '">' . esc_html( $coupon->coupon_code ) . '</a></td>
						</tr>';
					}
				} else {
					echo '<tr><td colspan="2">' . esc_html__( 'No coupons found in range', 'woocommerce' ) . '</td></tr>';
				}
				?>
			</table>
		</div>
		<h4 class="section_title"><span><?php esc_html_e( 'Most discount', 'woocommerce' ); ?></span></h4>
		<div class="section">
			<table cellspacing="0">
				<?php
				$most_discount = $this->get_order_report_data(
					array(
						'data'         => array(
							'order_item_name' => array(
								'type'            => 'order_item',
								'order_item_type' => 'coupon',
								'function'        => '',
								'name'            => 'coupon_code',
							),
							'discount_amount' => array(
								'type'            => 'order_item_meta',
								'order_item_type' => 'coupon',
								'function'        => 'SUM',
								'name'            => 'discount_amount',
							),
						),
						'where'        => array(
							array(
								'type'     => 'order_item',
								'key'      => 'order_item_type',
								'value'    => 'coupon',
								'operator' => '=',
							),
						),
						'order_by'     => 'discount_amount DESC',
						'group_by'     => 'order_item_name',
						'limit'        => 12,
						'query_type'   => 'get_results',
						'filter_range' => true,
					)
				);

				if ( ! empty( $most_discount ) && is_array( $most_discount ) ) {
					foreach ( $most_discount as $coupon ) {
						// @codingStandardsIgnoreStart
						echo '<tr class="' . ( in_array( $coupon->coupon_code, $this->coupon_codes ) ? 'active' : '' ) . '">
							<td class="count" width="1%">' . wc_price( $coupon->discount_amount ) . '</td>
							<td class="name"><a href="' . esc_url( add_query_arg( 'coupon_codes', $coupon->coupon_code ) ) . '">' . esc_html( $coupon->coupon_code ) . '</a></td>
						</tr>';
						// @codingStandardsIgnoreEnd
					}
				} else {
					echo '<tr><td colspan="3">' . esc_html__( 'No coupons found in range', 'woocommerce' ) . '</td></tr>';
				}
				?>
			</table>
		</div>
		<script type="text/javascript">
			jQuery('.section_title').click(function(){
				var next_section = jQuery(this).next('.section');

				if ( jQuery(next_section).is(':visible') )
					return false;

				jQuery('.section:visible').slideUp();
				jQuery('.section_title').removeClass('open');
				jQuery(this).addClass('open').next('.section').slideDown();

				return false;
			});
			jQuery('.section').slideUp( 100, function() {
				<?php if ( empty( $this->coupon_codes ) ) : ?>
					jQuery('.section_title:eq(1)').click();
				<?php else : ?>
					jQuery('.section_title:eq(0)').click();
				<?php endif; ?>
			});
		</script>
		<?php
	}