<?php
/**
 * The main giglogadmin plugin code.
 *
 * @package giglogadmin
 *
 * SPDX-FileCopyrightText: 2021 Andrea Chirulescu <andrea.chirulescu@gmail.com>
 * SPDX-FileCopyrightText: 2021 Harald Eilertsen <haraldei@anduin.net>
 * SPDX-License-Identifier: AGPL-3.0-or-later
 */

if ( ! class_exists( 'GiglogAdmin_Plugin' ) ) {

    /**
     * The Main GiglogAdmin plugin class.
     *
     * Handles initialization and loads the rest of the plugin as needed.
     */
    class GiglogAdmin_Plugin {

        /**
         * Initialize the plugin.
         *
         * Loads the required modules, and registers classbacks for
         * adding the admin pages and filters.
         */
        public static function init(): void {
            if ( ! defined( 'GIGLOGADMIN_UNIT_TEST' ) ) {
                require_once __DIR__ . '/giglogadmin-register-db-tables.php';
                giglog_register_db_tables();
            }

            require_once __DIR__ . '/class-giglogadmin-venue.php';
            require_once __DIR__ . '/class-giglogadmin-concert.php';
            require_once __DIR__ . '/giglogadmin-export-ical-handler.php';
            require_once __DIR__ . '/view-helpers/select-field-helper.php';

            if ( is_admin() ) {
                require_once __DIR__ . '/admin/views/class-giglogadmin-adminpage.php';
                require_once __DIR__ . '/admin/views/class-giglogadmin-importgigspage.php';
                require_once __DIR__ . '/admin/helpfiles/instrunctions.php';
                require_once __DIR__ . '/admin/helpfiles/instr_reviewers.php';
                require_once __DIR__ . '/admin/helpfiles/instr_photog.php';

                add_action( 'admin_menu', array( 'GiglogAdmin_Plugin', 'add_admin_pages' ) );
                add_action( 'admin_menu', array( 'GiglogAdmin_Plugin', 'add_help_pages' ) );

                add_filter( 'wp_nav_menu_args', array( 'GiglogAdmin_Plugin', 'nav_menu_args' ) );
            } else {
                require_once __DIR__ . '/view-helpers/class-giglogadmin-concertstable.php';
                require_once __DIR__ . '/giglogadmin-shortcodes.php';
            }
        }

        /**
         * Adds the 'Giglog' top level menu to the left side WordPress admin
         * menu. Other subpages will come later.
         *
         * @return void
         */
        public static function add_admin_pages(): void {
            if ( ! current_user_can( 'manage_options' ) ) {
                return;
            }
            $top = add_menu_page(
                'Giglog admin',             // Page title
                'Giglog',                   // Menu title
                'upload_files',             // Will show for users with this capability
                'giglog',                   // menu slug
                array( 'GiglogAdmin_AdminPage', 'render_html' ),     // callable
                'dashicons-tickets-alt',    // Icon url
                11                          // Position, just below 'Media'
            );

            add_action( 'load-' . $top, array( 'GiglogAdmin_AdminPage', 'update' ) );

            $import_hook = add_submenu_page(
                'giglog',                   // parent slug
                'Import gigs',              // page title
                'Import gigs',              // menu title
                'upload_files',             // required capability
                'giglog_import',            // menu slug
                array( 'GiglogAdmin_ImportGigsPage', 'render_html' )   // callable
            );

            if ( $import_hook !== false ) {
                add_action(
                    'load-' . $import_hook,
                    array( 'GiglogAdmin_ImportGigsPage', 'submit_form' )
                );
            }

            wp_register_style( 'css_style', plugins_url( '/css/main.css', __FILE__ ), array(), '1' );
            wp_enqueue_style( 'css_style' );
        }

        /**
         * Adds the "help" pages in the WordPress admin menu.
         */
        public static function add_help_pages(): void {
            if ( ! current_user_can( 'manage_options' ) ) {
                return;
            }
            add_menu_page(
                'Help for ET users',        // Page title
                'Help for ET users',        // Menu title
                'upload_files',             // Will show for users with this capability
                'helpfiles',                // menu slug
                array( 'Instructions_Page', 'render_instr_html' ),     // callable
                'dashicons-tickets-alt',    // Icon url
                10                          // Position, just below 'Media'
            );

            add_submenu_page(
                'helpfiles',                // parent slug
                'Reviewer help files',      // page title
                'Reviewer help files',      // menu title
                'upload_files',             // required capability
                'reviewer_help',            // menu slug
                array( 'Instructions_Reviewers', 'render_instr_rev_html' )   // callable
            );

            add_submenu_page(
                'helpfiles',                 // parent slug
                'Photogalleries help files', // page title
                'Photogalleries help files', // menu title
                'upload_files',              // required capability
                'photog_help',               // menu slug
                array( 'Instructions_Photogs', 'render_instr_photo_html' ) // callable
            );
        }

        /**
         * Show menus based on whether user is logged in or not.
         *
         * Giglog admin pages should only be visible for logged in users/can eventually
         * be customized by role if needed
         *
         * @param array $args   The menu array to filter.
         */
        private static function nav_menu_args( array $args = array() ) : array {
            if ( is_user_logged_in() ) {
                $args['menu'] = 'Loggedusers';
            } else {
                $args['menu'] = 'Notloggedusers';
            }

            return $args;
        }

    }

    register_activation_hook( __FILE__, array( 'GiglogAdmin_Plugin', 'activate' ) );
    register_deactivation_hook( __FILE__, array( 'GiglogAdmin_Plugin', 'deactivate' ) );

    GiglogAdmin_Plugin::init();
}