class BP_Legacy extends BP_Theme_Compat {

	/** Functions *************************************************************/

	/**
	 * The main BuddyPress (Legacy) Loader.
	 *
	 * @since 1.7.0
	 *
	 */
	public function __construct() {
		parent::start();
	}

	/**
	 * Component global variables.
	 *
	 * You'll want to customize the values in here, so they match whatever your
	 * needs are.
	 *
	 * @since 1.7.0
	 */
	protected function setup_globals() {
		$bp            = buddypress();
		$this->id      = 'legacy';
		$this->name    = __( 'BuddyPress Legacy', 'buddypress' );
		$this->version = bp_get_version();
		$this->dir     = trailingslashit( $bp->themes_dir . '/bp-legacy' );
		$this->url     = trailingslashit( $bp->themes_url . '/bp-legacy' );
	}

	/**
	 * Setup the theme hooks.
	 *
	 * @since 1.7.0
	 *
	 */
	protected function setup_actions() {

		// Template Output.
		add_filter( 'bp_get_activity_action_pre_meta', array( $this, 'secondary_avatars' ), 10, 2 );

		// Filter BuddyPress template hierarchy and look for page templates.
		add_filter( 'bp_get_buddypress_template', array( $this, 'theme_compat_page_templates' ), 10, 1 );

		/** Scripts ***********************************************************/

		add_action( 'bp_enqueue_scripts', array( $this, 'enqueue_styles'   ) ); // Enqueue theme CSS
		add_action( 'bp_enqueue_scripts', array( $this, 'enqueue_scripts'  ) ); // Enqueue theme JS
		add_filter( 'bp_enqueue_scripts', array( $this, 'localize_scripts' ) ); // Enqueue theme script localization

		/** Body no-js Class **************************************************/

		add_filter( 'body_class', array( $this, 'add_nojs_body_class' ), 20, 1 );

		/** Buttons ***********************************************************/

		if ( ! is_admin() || ( defined( 'DOING_AJAX' ) && DOING_AJAX ) ) {
			// Register buttons for the relevant component templates
			// Friends button.
			if ( bp_is_active( 'friends' ) )
				add_action( 'bp_member_header_actions',    'bp_add_friend_button',           5 );

			// Activity button.
			if ( bp_is_active( 'activity' ) && bp_activity_do_mentions() )
				add_action( 'bp_member_header_actions',    'bp_send_public_message_button',  20 );

			// Messages button.
			if ( bp_is_active( 'messages' ) )
				add_action( 'bp_member_header_actions',    'bp_send_private_message_button', 20 );

			// Group buttons.
			if ( bp_is_active( 'groups' ) ) {
				add_action( 'bp_group_header_actions',          'bp_group_join_button',               5           );
				add_action( 'bp_directory_groups_actions',      'bp_group_join_button'                            );
				add_action( 'bp_groups_directory_group_filter', 'bp_legacy_theme_group_create_nav', 999           );
				add_action( 'bp_after_group_admin_content',     'bp_legacy_groups_admin_screen_hidden_input'      );
				add_action( 'bp_before_group_admin_form',       'bp_legacy_theme_group_manage_members_add_search' );
			}

			// Blog button.
			if ( bp_is_active( 'blogs' ) ) {
				add_action( 'bp_directory_blogs_actions',    'bp_blogs_visit_blog_button'           );
				add_action( 'bp_blogs_directory_blog_types', 'bp_legacy_theme_blog_create_nav', 999 );
			}
		}

		/** Notices ***********************************************************/

		// Only hook the 'sitewide_notices' overlay if the Sitewide
		// Notices widget is not in use (to avoid duplicate content).
		if ( bp_is_active( 'messages' ) && ! is_active_widget( false, false, 'bp_messages_sitewide_notices_widget', true ) ) {
			add_action( 'wp_footer', array( $this, 'sitewide_notices' ), 9999 );
		}

		/** Ajax **************************************************************/

		$actions = array(

			// Directory filters.
			'blogs_filter'    => 'bp_legacy_theme_object_template_loader',
			'forums_filter'   => 'bp_legacy_theme_object_template_loader',
			'groups_filter'   => 'bp_legacy_theme_object_template_loader',
			'members_filter'  => 'bp_legacy_theme_object_template_loader',
			'messages_filter' => 'bp_legacy_theme_messages_template_loader',
			'invite_filter'   => 'bp_legacy_theme_invite_template_loader',
			'requests_filter' => 'bp_legacy_theme_requests_template_loader',

			// Friends.
			'accept_friendship' => 'bp_legacy_theme_ajax_accept_friendship',
			'addremove_friend'  => 'bp_legacy_theme_ajax_addremove_friend',
			'reject_friendship' => 'bp_legacy_theme_ajax_reject_friendship',

			// Activity.
			'activity_get_older_updates'  => 'bp_legacy_theme_activity_template_loader',
			'activity_mark_fav'           => 'bp_legacy_theme_mark_activity_favorite',
			'activity_mark_unfav'         => 'bp_legacy_theme_unmark_activity_favorite',
			'activity_widget_filter'      => 'bp_legacy_theme_activity_template_loader',
			'delete_activity'             => 'bp_legacy_theme_delete_activity',
			'delete_activity_comment'     => 'bp_legacy_theme_delete_activity_comment',
			'get_single_activity_content' => 'bp_legacy_theme_get_single_activity_content',
			'new_activity_comment'        => 'bp_legacy_theme_new_activity_comment',
			'post_update'                 => 'bp_legacy_theme_post_update',
			'bp_spam_activity'            => 'bp_legacy_theme_spam_activity',
			'bp_spam_activity_comment'    => 'bp_legacy_theme_spam_activity',

			// Groups.
			'groups_invite_user' => 'bp_legacy_theme_ajax_invite_user',
			'joinleave_group'    => 'bp_legacy_theme_ajax_joinleave_group',

			// Messages.
			'messages_autocomplete_results' => 'bp_legacy_theme_ajax_messages_autocomplete_results',
			'messages_close_notice'         => 'bp_legacy_theme_ajax_close_notice',
			'messages_delete'               => 'bp_legacy_theme_ajax_messages_delete',
			'messages_markread'             => 'bp_legacy_theme_ajax_message_markread',
			'messages_markunread'           => 'bp_legacy_theme_ajax_message_markunread',
			'messages_send_reply'           => 'bp_legacy_theme_ajax_messages_send_reply',
		);

		// Conditional actions.
		if ( bp_is_active( 'messages', 'star' ) ) {
			$actions['messages_star'] = 'bp_legacy_theme_ajax_messages_star_handler';
		}

		/**
		 * Register all of these AJAX handlers.
		 *
		 * The "wp_ajax_" action is used for logged in users, and "wp_ajax_nopriv_"
		 * executes for users that aren't logged in. This is for backpat with BP <1.6.
		 */
		foreach( $actions as $name => $function ) {
			add_action( 'wp_ajax_'        . $name, $function );
			add_action( 'wp_ajax_nopriv_' . $name, $function );
		}

		add_filter( 'bp_ajax_querystring', 'bp_legacy_theme_ajax_querystring', 10, 2 );

		/** Override **********************************************************/

		/**
		 * Fires after all of the BuddyPress theme compat actions have been added.
		 *
		 * @since 1.7.0
		 *
		 * @param BP_Legacy $this Current BP_Legacy instance.
		 */
		do_action_ref_array( 'bp_theme_compat_actions', array( &$this ) );
	}

	/**
	 * Load the theme CSS
	 *
	 * @since 1.7.0
	 * @since 2.3.0 Support custom CSS file named after the current theme or parent theme.
	 *
	 */
	public function enqueue_styles() {
		$min = bp_core_get_minified_asset_suffix();

		// Locate the BP stylesheet.
		$ltr = $this->locate_asset_in_stack( "buddypress{$min}.css",     'css' );

		// LTR.
		if ( ! is_rtl() && isset( $ltr['location'], $ltr['handle'] ) ) {
			wp_enqueue_style( $ltr['handle'], $ltr['location'], array(), $this->version, 'screen' );

			if ( $min ) {
				wp_style_add_data( $ltr['handle'], 'suffix', $min );
			}
		}

		// RTL.
		if ( is_rtl() ) {
			$rtl = $this->locate_asset_in_stack( "buddypress-rtl{$min}.css", 'css' );

			if ( isset( $rtl['location'], $rtl['handle'] ) ) {
				$rtl['handle'] = str_replace( '-css', '-css-rtl', $rtl['handle'] );  // Backwards compatibility.
				wp_enqueue_style( $rtl['handle'], $rtl['location'], array(), $this->version, 'screen' );

				if ( $min ) {
					wp_style_add_data( $rtl['handle'], 'suffix', $min );
				}
			}
		}

		// Compatibility stylesheets for specific themes.
		$theme = $this->locate_asset_in_stack( get_template() . "{$min}.css", 'css' );
		if ( ! is_rtl() && isset( $theme['location'] ) ) {
			// Use a unique handle.
			$theme['handle'] = 'bp-' . get_template();
			wp_enqueue_style( $theme['handle'], $theme['location'], array(), $this->version, 'screen' );

			if ( $min ) {
				wp_style_add_data( $theme['handle'], 'suffix', $min );
			}
		}

		// Compatibility stylesheet for specific themes, RTL-version.
		if ( is_rtl() ) {
			$theme_rtl = $this->locate_asset_in_stack( get_template() . "-rtl{$min}.css", 'css' );

			if ( isset( $theme_rtl['location'] ) ) {
				$theme_rtl['handle'] = $theme['handle'] . '-rtl';
				wp_enqueue_style( $theme_rtl['handle'], $theme_rtl['location'], array(), $this->version, 'screen' );

				if ( $min ) {
					wp_style_add_data( $theme_rtl['handle'], 'suffix', $min );
				}
			}
		}
	}

	/**
	 * Enqueue the required JavaScript files
	 *
	 * @since 1.7.0
	 */
	public function enqueue_scripts() {
		$min = bp_core_get_minified_asset_suffix();

		// Locate the BP JS file.
		$asset = $this->locate_asset_in_stack( "buddypress{$min}.js", 'js' );

		// Enqueue the global JS, if found - AJAX will not work
		// without it.
		if ( isset( $asset['location'], $asset['handle'] ) ) {
			wp_enqueue_script( $asset['handle'], $asset['location'], bp_core_get_js_dependencies(), $this->version );
		}

		/**
		 * Filters whether directory filter settings ('scope', etc) should be stored in a persistent cookie.
		 *
		 * @since 4.0.0
		 *
		 * @param bool $store_filter_settings Whether to store settings. Defaults to true for logged-in users.
		 */
		$store_filter_settings = apply_filters( 'bp_legacy_store_filter_settings', is_user_logged_in() );

		/**
		 * Filters core JavaScript strings for internationalization before AJAX usage.
		 *
		 * @since 2.0.0
		 *
		 * @param array $value Array of key/value pairs for AJAX usage.
		 */
		$params = apply_filters( 'bp_core_get_js_strings', array(
			// Strings for display.
			'accepted'            => __( 'Accepted', 'buddypress' ),
			'close'               => __( 'Close', 'buddypress' ),
			'comments'            => __( 'comments', 'buddypress' ),
			'leave_group_confirm' => __( 'Are you sure you want to leave this group?', 'buddypress' ),
			'mark_as_fav'	      => __( 'Favorite', 'buddypress' ),
			'my_favs'             => __( 'My Favorites', 'buddypress' ),
			'rejected'            => __( 'Rejected', 'buddypress' ),
			'remove_fav'	      => __( 'Remove Favorite', 'buddypress' ),
			'show_all'            => __( 'Show all', 'buddypress' ),
			'show_all_comments'   => __( 'Show all comments for this thread', 'buddypress' ),
			'show_x_comments'     => __( 'Show all comments (%d)', 'buddypress' ),
			'unsaved_changes'     => __( 'Your profile has unsaved changes. If you leave the page, the changes will be lost.', 'buddypress' ),
			'view'                => __( 'View', 'buddypress' ),

			// Settings.
			'store_filter_settings' => $store_filter_settings,
		) );
		wp_localize_script( $asset['handle'], 'BP_DTheme', $params );

		// Maybe enqueue comment reply JS.
		if ( is_singular() && bp_is_blog_page() && get_option( 'thread_comments' ) ) {
			wp_enqueue_script( 'comment-reply' );
		}

		// Maybe enqueue password verify JS (register page or user settings page).
		if ( bp_is_register_page() || ( function_exists( 'bp_is_user_settings_general' ) && bp_is_user_settings_general() ) ) {

			// Locate the Register Page JS file.
			$asset = $this->locate_asset_in_stack( "password-verify{$min}.js", 'js', 'bp-legacy-password-verify' );

			$dependencies = array_merge( bp_core_get_js_dependencies(), array(
				'password-strength-meter',
			) );

			// Enqueue script.
			wp_enqueue_script( $asset['handle'] . '-password-verify', $asset['location'], $dependencies, $this->version);
		}

		// Star private messages.
		if ( bp_is_active( 'messages', 'star' ) && bp_is_user_messages() ) {
			wp_localize_script( $asset['handle'], 'BP_PM_Star', array(
				'strings' => array(
					'text_unstar'  => __( 'Unstar', 'buddypress' ),
					'text_star'    => __( 'Star', 'buddypress' ),
					'title_unstar' => __( 'Starred', 'buddypress' ),
					'title_star'   => __( 'Not starred', 'buddypress' ),
					'title_unstar_thread' => __( 'Remove all starred messages in this thread', 'buddypress' ),
					'title_star_thread'   => __( 'Star the first message in this thread', 'buddypress' ),
				),
				'is_single_thread' => (int) bp_is_messages_conversation(),
				'star_counter'     => 0,
				'unstar_counter'   => 0
			) );
		}
	}

	/**
	 * Get the URL and handle of a web-accessible CSS or JS asset
	 *
	 * We provide two levels of customizability with respect to where CSS
	 * and JS files can be stored: (1) the child theme/parent theme/theme
	 * compat hierarchy, and (2) the "template stack" of /buddypress/css/,
	 * /community/css/, and /css/. In this way, CSS and JS assets can be
	 * overloaded, and default versions provided, in exactly the same way
	 * as corresponding PHP templates.
	 *
	 * We are duplicating some of the logic that is currently found in
	 * bp_locate_template() and the _template_stack() functions. Those
	 * functions were built with PHP templates in mind, and will require
	 * refactoring in order to provide "stack" functionality for assets
	 * that must be accessible both using file_exists() (the file path)
	 * and at a public URI.
	 *
	 * This method is marked private, with the understanding that the
	 * implementation is subject to change or removal in an upcoming
	 * release, in favor of a unified _template_stack() system. Plugin
	 * and theme authors should not attempt to use what follows.
	 *
	 * @since 1.8.0
	 * @param string $file A filename like buddypress.css.
	 * @param string $type Optional. Either "js" or "css" (the default).
	 * @param string $script_handle Optional. If set, used as the script name in `wp_enqueue_script`.
	 * @return array An array of data for the wp_enqueue_* function:
	 *   'handle' (eg 'bp-child-css') and a 'location' (the URI of the
	 *   asset)
	 */
	private function locate_asset_in_stack( $file, $type = 'css', $script_handle = '' ) {
		$locations = array();

		// Ensure the assets can be located when running from /src/.
		if ( defined( 'BP_SOURCE_SUBDIRECTORY' ) && BP_SOURCE_SUBDIRECTORY === 'src' ) {
			$file = str_replace( '.min', '', $file );
		}

		// No need to check child if template == stylesheet.
		if ( is_child_theme() ) {
			$locations[] = array(
				'type' => 'bp-child',
				'dir'  => get_stylesheet_directory(),
				'uri'  => get_stylesheet_directory_uri(),
				'file' => $file,
			);

			$locations[] = array(
				'type' => 'bp-child',
				'dir'  => get_stylesheet_directory(),
				'uri'  => get_stylesheet_directory_uri(),
				'file' => str_replace( '.min', '', $file ),
			);
		}

		$locations[] = array(
			'type' => 'bp-parent',
			'dir'  => get_template_directory(),
			'uri'  => get_template_directory_uri(),
			'file' => str_replace( '.min', '', $file ),
		);

		$locations[] = array(
			'type' => 'bp-legacy',
			'dir'  => bp_get_theme_compat_dir(),
			'uri'  => bp_get_theme_compat_url(),
			'file' => $file,
		);

		// Subdirectories within the top-level $locations directories.
		$subdirs = array(
			'buddypress/' . $type,
			'community/' . $type,
			$type,
		);

		$retval = array();

		foreach ( $locations as $location ) {
			foreach ( $subdirs as $subdir ) {
				if ( file_exists( trailingslashit( $location['dir'] ) . trailingslashit( $subdir ) . $location['file'] ) ) {
					$retval['location'] = trailingslashit( $location['uri'] ) . trailingslashit( $subdir ) . $location['file'];
					$retval['handle']   = ( $script_handle ) ? $script_handle : "{$location['type']}-{$type}";

					break 2;
				}
			}
		}

		return $retval;
	}

	/**
	 * Adds the no-js class to the body tag.
	 *
	 * This function ensures that the <body> element will have the 'no-js' class by default. If you're
	 * using JavaScript for some visual functionality in your theme, and you want to provide noscript
	 * support, apply those styles to body.no-js.
	 *
	 * The no-js class is removed by the JavaScript created in buddypress.js.
	 *
	 * @since 1.7.0
	 *
	 * @param array $classes Array of classes to append to body tag.
	 * @return array $classes
	 */
	public function add_nojs_body_class( $classes ) {
		if ( ! in_array( 'no-js', $classes ) )
			$classes[] = 'no-js';

		return array_unique( $classes );
	}

	/**
	 * Load localizations for topic script.
	 *
	 * These localizations require information that may not be loaded even by init.
	 *
	 * @since 1.7.0
	 */
	public function localize_scripts() {
	}

	/**
	 * Outputs sitewide notices markup in the footer.
	 *
	 * @since 1.7.0
	 *
	 * @see https://buddypress.trac.wordpress.org/ticket/4802
	 */
	public function sitewide_notices() {
		// Do not show notices if user is not logged in.
		if ( ! is_user_logged_in() )
			return;

		// Add a class to determine if the admin bar is on or not.
		$class = did_action( 'admin_bar_menu' ) ? 'admin-bar-on' : 'admin-bar-off';

		echo '<div id="sitewide-notice" class="' . $class . '">';
		bp_message_get_notices();
		echo '</div>';
	}

	/**
	 * Add secondary avatar image to this activity stream's record, if supported.
	 *
	 * @since 1.7.0
	 *
	 * @param string               $action   The text of this activity.
	 * @param BP_Activity_Activity $activity Activity object.
	 * @return string
	 */
	function secondary_avatars( $action, $activity ) {
		switch ( $activity->component ) {
			case 'groups' :
			case 'friends' :
				// Only insert avatar if one exists.
				if ( $secondary_avatar = bp_get_activity_secondary_avatar() ) {
					$reverse_content = strrev( $action );
					$position        = strpos( $reverse_content, 'a<' );
					$action          = substr_replace( $action, $secondary_avatar, -$position - 2, 0 );
				}
				break;
		}

		return $action;
	}

	/**
	 * Filter the default theme compatibility root template hierarchy, and prepend
	 * a page template to the front if it's set.
	 *
	 * @see https://buddypress.trac.wordpress.org/ticket/6065
	 *
	 * @since 2.2.0
	 *
	 * @param  array $templates Array of templates.
	 *                         to use the defined page template for component's directory and its single items
	 * @return array
	 */
	public function theme_compat_page_templates( $templates = array() ) {

		/**
		 * Filters whether or not we are looking at a directory to determine if to return early.
		 *
		 * @since 2.2.0
		 *
		 * @param bool $value Whether or not we are viewing a directory.
		 */
		if ( true === (bool) apply_filters( 'bp_legacy_theme_compat_page_templates_directory_only', ! bp_is_directory() ) ) {
			return $templates;
		}

		// No page ID yet.
		$page_id = 0;

		// Get the WordPress Page ID for the current view.
		foreach ( (array) buddypress()->pages as $component => $bp_page ) {

			// Handles the majority of components.
			if ( bp_is_current_component( $component ) ) {
				$page_id = (int) $bp_page->id;
			}

			// Stop if not on a user page.
			if ( ! bp_is_user() && ! empty( $page_id ) ) {
				break;
			}

			// The Members component requires an explicit check due to overlapping components.
			if ( bp_is_user() && ( 'members' === $component ) ) {
				$page_id = (int) $bp_page->id;
				break;
			}
		}

		// Bail if no directory page set.
		if ( 0 === $page_id ) {
			return $templates;
		}

		// Check for page template.
		$page_template = get_page_template_slug( $page_id );

		// Add it to the beginning of the templates array so it takes precedence
		// over the default hierarchy.
		if ( ! empty( $page_template ) ) {

			/**
			 * Check for existence of template before adding it to template
			 * stack to avoid accidentally including an unintended file.
			 *
			 * @see: https://buddypress.trac.wordpress.org/ticket/6190
			 */
			if ( '' !== locate_template( $page_template ) ) {
				array_unshift( $templates, $page_template );
			}
		}

		return $templates;
	}
}