class BBP_Replies_Widget extends WP_Widget {

	/**
	 * bbPress Replies Widget
	 *
	 * Registers the replies widget
	 *
	 * @since 2.0.0 bbPress (r2653)
	 */
	public function __construct() {
		$widget_ops = apply_filters( 'bbp_replies_widget_options', array(
			'classname'                   => 'widget_display_replies',
			'description'                 => esc_html__( 'A list of the most recent replies.', 'bbpress' ),
			'customize_selective_refresh' => true
		) );

		parent::__construct( false, esc_html__( '(bbPress) Recent Replies', 'bbpress' ), $widget_ops );
	}

	/**
	 * Register the widget
	 *
	 * @since 2.0.0 bbPress (r3389)
	 */
	public static function register_widget() {
		register_widget( 'BBP_Replies_Widget' );
	}

	/**
	 * Displays the output, the replies list
	 *
	 * @since 2.0.0 bbPress (r2653)
	 *
	 * @param array $args
	 * @param array $instance
	 */
	public function widget( $args, $instance ) {

		// Get widget settings
		$settings = $this->parse_settings( $instance );

		// Typical WordPress filter
		$settings['title'] = apply_filters( 'widget_title',             $settings['title'], $instance, $this->id_base );

		// bbPress filter
		$settings['title'] = apply_filters( 'bbp_replies_widget_title', $settings['title'], $instance, $this->id_base );

		// Note: private and hidden forums will be excluded via the
		// bbp_pre_get_posts_normalize_forum_visibility action and function.
		$widget_query = new WP_Query( array(

			// What and when
			'post_type'      => bbp_get_reply_post_type(),
			'post_status'    => bbp_get_public_reply_statuses(),
			'posts_per_page' => (int) $settings['max_shown'],

			// Performance
			'ignore_sticky_posts'    => true,
			'no_found_rows'          => true,
			'update_post_term_cache' => false,
			'update_post_meta_cache' => false
		) );

		// Bail if no replies
		if ( ! $widget_query->have_posts() ) {
			return;
		}

		// Start an output buffer
		ob_start();

		echo $args['before_widget'];

		if ( ! empty( $settings['title'] ) ) {
			echo $args['before_title'] . $settings['title'] . $args['after_title'];
		} ?>

		<ul class="bbp-replies-widget">

			<?php while ( $widget_query->have_posts() ) : $widget_query->the_post(); ?>

				<li>

					<?php

					// Verify the reply ID
					$reply_id   = bbp_get_reply_id( $widget_query->post->ID );
					$reply_link = '<a class="bbp-reply-topic-title" href="' . esc_url( bbp_get_reply_url( $reply_id ) ) . '" title="' . esc_attr( bbp_get_reply_excerpt( $reply_id, 50 ) ) . '">' . esc_html( bbp_get_reply_topic_title( $reply_id ) ) . '</a>';
					$time       = get_the_time( 'U', $reply_id );
					$show_date  = '<time datetime="' . gmdate( 'Y-m-d H:i:s', $time ) . '">' . esc_html( bbp_get_time_since( $time ) ) . '</time>';

					// Only query user if showing them
					if ( ! empty( $settings['show_user'] ) ) :
						$author_link = bbp_get_reply_author_link( array( 'post_id' => $reply_id, 'type' => 'both', 'size' => 14 ) );
					else :
						$author_link = false;
					endif;

					// Reply author, link, and timestamp
					if ( ! empty( $settings['show_date'] ) && ! empty( $author_link ) ) :

						// translators: 1: reply author, 2: reply link, 3: reply timestamp
						printf( esc_html_x( '%1$s on %2$s %3$s', 'widgets', 'bbpress' ), $author_link, $reply_link, $show_date );

					// Reply link and timestamp
					elseif ( ! empty( $settings['show_date'] ) ) :
						echo $reply_link . ' ' . $show_date;

					// Reply author and title
					elseif ( ! empty( $author_link ) ) :

						// translators: 1: reply author, 2: reply link
						printf( esc_html_x( '%1$s on %2$s', 'widgets', 'bbpress' ), $author_link, $reply_link );

					// Only the reply title
					else :
						echo $reply_link;
					endif;

					?>

				</li>

			<?php endwhile; ?>

		</ul>

		<?php echo $args['after_widget'];

		// Reset the $post global
		wp_reset_postdata();

		// Output the current buffer
		echo ob_get_clean();
	}

	/**
	 * Update the reply widget options
	 *
	 * @since 2.0.0 bbPress (r2653)
	 *
	 * @param array $new_instance The new instance options
	 * @param array $old_instance The old instance options
	 */
	public function update( $new_instance = array(), $old_instance = array() ) {
		$instance              = $old_instance;
		$instance['title']     = strip_tags( $new_instance['title'] );
		$instance['max_shown'] = (int) $new_instance['max_shown'];

		// Date
		$instance['show_date'] = isset( $new_instance['show_date'] )
			? (bool) $new_instance['show_date']
			: false;

		// Author
		$instance['show_user'] = isset( $new_instance['show_user'] )
			? (bool) $new_instance['show_user']
			: false;

		return $instance;
	}

	/**
	 * Output the reply widget options form
	 *
	 * @since 2.0.0 bbPress (r2653)
	 *
	 * @param $instance Instance
	 */
	public function form( $instance = array() ) {

		// Get widget settings
		$settings = $this->parse_settings( $instance ); ?>

		<p><label for="<?php echo $this->get_field_id( 'title'     ); ?>"><?php esc_html_e( 'Title:',                   'bbpress' ); ?> <input class="widefat" id="<?php echo $this->get_field_id( 'title'     ); ?>" name="<?php echo $this->get_field_name( 'title'     ); ?>" type="text" value="<?php echo esc_attr( $settings['title']     ); ?>" /></label></p>
		<p><label for="<?php echo $this->get_field_id( 'max_shown' ); ?>"><?php esc_html_e( 'Maximum replies to show:', 'bbpress' ); ?> <input class="widefat" id="<?php echo $this->get_field_id( 'max_shown' ); ?>" name="<?php echo $this->get_field_name( 'max_shown' ); ?>" type="text" value="<?php echo esc_attr( $settings['max_shown'] ); ?>" /></label></p>
		<p><label for="<?php echo $this->get_field_id( 'show_date' ); ?>"><?php esc_html_e( 'Show post date:',          'bbpress' ); ?> <input type="checkbox" id="<?php echo $this->get_field_id( 'show_date' ); ?>" name="<?php echo $this->get_field_name( 'show_date' ); ?>" <?php checked( true, $settings['show_date'] ); ?> value="1" /></label></p>
		<p><label for="<?php echo $this->get_field_id( 'show_user' ); ?>"><?php esc_html_e( 'Show reply author:',       'bbpress' ); ?> <input type="checkbox" id="<?php echo $this->get_field_id( 'show_user' ); ?>" name="<?php echo $this->get_field_name( 'show_user' ); ?>" <?php checked( true, $settings['show_user'] ); ?> value="1" /></label></p>

		<?php
	}

	/**
	 * Merge the widget settings into defaults array.
	 *
	 * @since 2.3.0 bbPress (r4802)
	 *
	 * @param $instance Instance
	 */
	public function parse_settings( $instance = array() ) {
		return bbp_parse_args( $instance, array(
			'title'     => esc_html__( 'Recent Replies', 'bbpress' ),
			'max_shown' => 5,
			'show_date' => false,
			'show_user' => false
		), 'replies_widget_settings' );
	}
}