<?php

class SimpleTags_Admin_Autocomplete {

	public function __construct() {
		// Ajax action, JS Helper and admin action
		add_action( 'wp_ajax_simpletags_autocomplete', array( __CLASS__, 'ajax_check' ) );

		// TaxoPress hook
		add_action( 'simpletags-auto_terms', array( __CLASS__, 'auto_terms_js' ) );
		add_action( 'simpletags-manage_terms', array( __CLASS__, 'manage_terms_js' ) );
		add_action( 'simpletags-mass_terms', array( __CLASS__, 'mass_terms_js' ) );
		add_action( 'simpletags-autolinks', array( __CLASS__, 'autolinks_js' ) );
        add_action( 'simpletags-terms_display', array( __CLASS__, 'terms_display_js' ) );

		// Javascript
		add_action( 'admin_enqueue_scripts', array( __CLASS__, 'admin_enqueue_scripts' ), 11 );
	}

	/**
	 * Init some JS and CSS need for this feature
	 *
	 * @return void
	 * @author WebFactory Ltd
	 */
	public static function admin_enqueue_scripts() {
		global $pagenow;

		// Register JS/CSS
		wp_register_script(
			'st-helper-autocomplete',
			STAGS_URL . '/assets/js/helper-autocomplete.js',
			array(
				'jquery',
				'jquery-ui-autocomplete',
			),
			STAGS_VERSION
		);
        $nonce = wp_create_nonce( 'st-admin-js' );

		// Declare locations
		$wp_post_pages = array( 'post.php', 'post-new.php' );
		$wp_page_pages = array( 'page.php', 'page-new.php' );
        $term_pages    = array( 'term.php', 'edit-tags.php' );
        $st_pages      = array( 'st_autoterms', 'st_mass_terms', 'st_manage', 'st_autolinks', 'st_terms_display' );

		// Helper for posts/pages and for Auto Tags, Mass Edit Tags and Manage tags !
		if ( ( in_array( $pagenow, $wp_post_pages, true ) || ( in_array( $pagenow, $wp_page_pages, true ) && is_page_have_tags() ) ) || ( isset( $_GET['page'] ) && in_array( $_GET['page'], $st_pages, true ) ) ) {
			wp_enqueue_script( 'st-helper-autocomplete' );
		}

        if ( in_array( $pagenow, $wp_post_pages, true ) || ( in_array( $pagenow, $wp_page_pages, true ) && is_page_have_tags() ) || in_array( $pagenow, $term_pages, true ) || ( isset( $_GET['page'] ) && in_array( $_GET['page'], $st_pages, true ) )
        ) {
            // Inline nonce for legacy code
            wp_add_inline_script(
                'st-helper-autocomplete',
                'window.taxopressNonce = "' . esc_js( $nonce ) . '";',
                'before'
            );
            wp_enqueue_script( 'st-helper-autocomplete' );
        }
	}

	/**
	 * Ajax Dispatcher
	 *
	 */
	public static function ajax_check() {
        // Capability first (must be logged in + have perms anyway)
        if ( ! current_user_can( 'simple_tags' ) && ! current_user_can( 'edit_posts' ) ) {
            wp_send_json_error( array( 'message' => 'Insufficient permissions.' ), 403 );
        }

        // Check if nonce is set and valid
        if ( ! isset( $_REQUEST['nonce'] ) || ! wp_verify_nonce( $_REQUEST['nonce'], 'st-admin-js' ) ) {
            wp_send_json_error( array( 'message' => 'Invalid or missing nonce.' ), 403 );
        }

		if ( isset( $_GET['stags_action'] ) && 'helper_js_collection' === $_GET['stags_action'] ) {
			self::ajax_local_tags();
		}
	}

	/**
	 * Display a javascript collection for autocompletion script !
	 *
	 * @return void
	 * @author WebFactory Ltd
	 */
	public static function ajax_local_tags() {
		status_header( 200 ); // Send good header HTTP
		header( 'Content-Type: application/json; charset=' . get_bloginfo( 'charset' ) );

		$taxonomy = 'post_tag';
		if ( isset($_REQUEST['taxonomy']) && !empty($_REQUEST['taxonomy']) ) {//  && 
			$taxonomy = sanitize_text_field($_REQUEST['taxonomy']);
		}
		if (taxonomy_exists($taxonomy) && (int) wp_count_terms( $taxonomy, array( 'hide_empty' => false ) ) === 0 ) { // No tags to suggest
			echo wp_json_encode( array() );
			exit();
		}

		// Prepare search
		$search = ( isset( $_GET['term'] ) ) ? trim( stripslashes( sanitize_text_field($_GET['term']) )) : '';
		$exclude_term = isset($_REQUEST['exclude_term']) ? (int) $_REQUEST['exclude_term'] : 0;

		// Get all terms, or filter with search
		$terms = SimpleTags_Admin::getTermsForAjax( $taxonomy, $search );

		if ( empty( $terms ) ) {
			echo wp_json_encode( array() );
			exit();
		}

		// Format 
		$results = array();
		foreach ( (array) $terms as $term ) {
			if ((int) $term->term_id === $exclude_term) {
				continue;
			}

			$term->name    = stripslashes( $term->name );
			$original_name = $term->name;

			$is_mass_edit_page = isset( $_GET['page'] ) && $_GET['page'] === 'st_mass_terms';
			$show_slug         = SimpleTags_Plugin::get_option_value( 'enable_mass-edit_terms_slug' );
			if ( $is_mass_edit_page && $show_slug && ! empty( $term->slug ) ) {
				$term->name = $term->name . ' (' . $term->slug . ')';
			}

			if ( $taxonomy === 'linked_term_taxonomies' ) {
				$term->name = $term->name . ' (' . $term->taxonomy . ')';
			}

			$term->name = str_replace( array( "\r\n", "\r", "\n" ), '', $term->name );

			// Decode any HTML entities for display in autocomplete widgets.
			$display_name = html_entity_decode(
				$term->name,
				ENT_QUOTES,
				get_bloginfo( 'charset' )
			);

			$results[] = array(
				'id'       => $term->term_id,
				'label'    => $display_name,
				'value'    => $display_name,
				'taxonomy' => $term->taxonomy,
				'name'     => $original_name,
			);
		}

		echo wp_json_encode( $results );
		exit();
	}

	/**
	 * Content of custom meta box of TaxoPress
	 *
	 * @param object $post
	 *
	 * @return void
	 * @author WebFactory Ltd
	 */
	public static function metabox( $post ) {
		// Get options
		$autocomplete_min = 0
		?>
		<p>
			<?php wp_nonce_field( 'update-simple-tags', 'nonce-simple-tags' ); ?>
			<input type="hidden" name="adv-tags-input-here" value="1"/>
				<input type="text" class="widefat" name="adv-tags-input" id="adv-tags-input"
					   value="<?php echo esc_attr( SimpleTags_Admin::getTermsToEdit( 'post_tag', $post->ID ) ); ?>"/>

			<?php esc_html_e( 'Separate tags with commas', 'simple-tags' ); ?>
		</p>
		<script type="text/javascript">
          <!--
          st_init_autocomplete('#adv-tags-input', '<?php echo esc_url_raw(admin_url( "admin-ajax.php?action=simpletags_autocomplete&stags_action=helper_js_collection&nonce=" . wp_create_nonce( 'st-admin-js' ) )); ?>', <?php echo (int)$autocomplete_min; ?>)
          -->
		</script>
		<?php
	}

	/**
	 * public static function called on auto terms page
	 *
	 * @param string $taxonomy
	 *
	 * @return void
	 * @author WebFactory Ltd
	 */
	public static function auto_terms_js( $taxonomy = '' ) {
		// Get option
		$autocomplete_min = 0
		?>
		<script type="text/javascript">
          <!--
          st_init_autocomplete('#auto_list', "<?php echo esc_url_raw(admin_url( 'admin-ajax.php?action=simpletags_autocomplete&stags_action=helper_js_collection&taxonomy=' . $taxonomy . '&nonce=' . wp_create_nonce( 'st-admin-js' ) )); ?>", <?php echo (int)$autocomplete_min; ?>)
          -->
		</script>
		<?php
	}

	/**
	 * public static function called on manage terms page
	 *
	 * @param string $taxonomy
	 *
	 * @return void
	 * @author WebFactory Ltd
	 */
	public static function manage_terms_js( $taxonomy = '' ) {
		// Get option
		$autocomplete_min = 0
		?>
		<script type="text/javascript">
          <!--
          st_init_autocomplete('.autocomplete-input', "<?php echo esc_url_raw(admin_url( 'admin-ajax.php?action=simpletags_autocomplete&stags_action=helper_js_collection&taxonomy=' . $taxonomy . '&nonce=' . wp_create_nonce( 'st-admin-js' ) )); ?>", <?php echo (int)$autocomplete_min; ?>)
          -->
		</script>
		<?php
	}

	/**
	 * public static function called on mass terms page
	 *
	 * @param string $taxonomy
	 *
	 * @return void
	 * @author WebFactory Ltd
	 */
	public static function mass_terms_js( $taxonomy = '' ) {
		// Get option
		$autocomplete_min = 0
		?>
		<script type="text/javascript">
          <!--
           st_init_autocomplete('.autocomplete-input', "<?php echo esc_url_raw(admin_url( 'admin-ajax.php?action=simpletags_autocomplete&stags_action=helper_js_collection&taxonomy=' . esc_attr($taxonomy) . '&page=st_mass_terms&nonce=' . wp_create_nonce( 'st-admin-js' ) )); ?>", <?php echo (int)$autocomplete_min; ?>)
          -->
		</script>
		<?php
	}

	/**
	 * public static function called on autolinks page
	 *
	 * @param string $taxonomy
	 *
	 * @return void
	 * @author ojopaul
	 */
	public static function autolinks_js() {
		// Get option
		$autocomplete_min = 0
		?>
		<script type="text/javascript">
          <!--
          st_init_autocomplete('.autocomplete-input', "<?php echo esc_url_raw(admin_url( 'admin-ajax.php?action=simpletags_autocomplete&stags_action=helper_js_collection&taxonomy=&nonce=' . wp_create_nonce( 'st-admin-js' ) )); ?>", <?php echo (int)$autocomplete_min; ?>, '.taxopress-dynamic-taxonomy')
          -->
		</script>
		<?php
	}

    /**
     * public static function called on terms display (tag cloud) page
     *
     * @param string $taxonomy
    */
    public static function terms_display_js( $taxonomy = '' ) {
        $autocomplete_min = 0;
        ?>
        <script type="text/javascript">
          <!--
          // Base URL leaves taxonomy blank so helper JS can replace it dynamically
          st_init_autocomplete(
              '.tagclouds-exclude',
              "<?php echo esc_url_raw(
                  admin_url(
                      'admin-ajax.php?action=simpletags_autocomplete&stags_action=helper_js_collection&taxonomy=&nonce=' . wp_create_nonce('st-admin-js')
                  )
              ); ?>",
              <?php echo (int) $autocomplete_min; ?>
          );
          st_init_autocomplete(
              '.tagclouds-include',
              "<?php echo esc_url_raw(
                  admin_url(
                      'admin-ajax.php?action=simpletags_autocomplete&stags_action=helper_js_collection&taxonomy=&nonce=' . wp_create_nonce('st-admin-js')
                  )
              ); ?>",
              <?php echo (int) $autocomplete_min; ?>
          );
          -->
        </script>
        <?php
    }

}