<?php

  /**
   * File for our cool Carousel in the footer
   *
   * @category Child Plugin
   * @version v0.3.1
   * @since v0.1.0
   * @author iClyde <kontakt@iclyde.pl>
   */

  // Namespace
  namespace Inisev\Subs;

  // Disallow direct access
  if ( ! defined( 'ABSPATH' ) ) exit;

  /**
   * Main class for handling the Carousel
   */
  if (!class_exists('Inisev\Subs\Inisev_Carousel')) {
    class Inisev_Carousel {

      // Should hide it for good i.e. styles may be broken?
      private $error = 0;

      // Slugs of plugins
      private $usm_premium = 'usm-premium/usm_premium_icons.php';
      private $usm_slug = 'ultimate-social-media-icons/ultimate_social_media_icons.php';
      private $bmi_premium = 'backup-backup-pro/backup-backup-pro.php';
      private $bmi_slug = 'backup-backup/backup-backup.php';
      private $cdp_premium = 'copy-delete-posts-premium/copy-delete-posts-premium.php';
      private $cdp_slug = 'copy-delete-posts/copy-delete-posts.php';
      private $mpu_slug = 'pop-up-pop-up/pop-up-pop-up.php';
      private $redi_slug = 'redirect-redirection/redirect-redirection.php';
      
      // Global variables
      public $_root_file = null;
      public $_root_dir = null;
      public $page = null;
      public $slug = null;
      public $root = null;
      public $slug_low = null;
      public $hooked = null;
      public $menu = null;
      public $url = null;
      
      /*
      * Compile some variables for "future us"
      * Such as slug of current plugin, root dir of plugin
      */
      function __construct($root_file, $root_dir) {

        // This roots
        $this->_root_file = $root_file;
        $this->_root_dir = $root_dir;

        // Add handler for Ajax request
        if (isset($_SERVER['REQUEST_METHOD']) && $_SERVER['REQUEST_METHOD'] == 'POST') {

          // Check if slug is defined
          if (isset($_POST['slug']) && !empty($_POST['slug'])) {

            // Handle the request
            add_action('wp_ajax_inisev_installation', [&$this, 'handle_installation']);
            add_action('wp_ajax_inisev_installation_widget', [&$this, 'handle_installation']);

          }

          // Stop for POST
          return;

        }

        // WordPress globals
        global $menu;

        // Make sure WP_PLUGIN_DIR is defined
        if (!defined('WP_PLUGIN_DIR')) return $this->fail(1);
        if (!function_exists('trailingslashit')) return $this->fail(2);
        if (!defined('DIRECTORY_SEPARATOR')) define('DIRECTORY_SEPARATOR', '/');

        // That's in case the developer moved this file somewhere else
        $tmp_slug = trailingslashit($this->_root_dir);
        $tmp_root = trailingslashit(WP_PLUGIN_DIR);
        $tmp_name = explode(DIRECTORY_SEPARATOR, substr($tmp_slug, strlen($tmp_root)));

        // Make the "probably" slug name
        $this->page = sanitize_text_field($_GET['page']);
        $this->slug = $tmp_name[0];
        $this->root = $tmp_root . $this->slug;

        // Make lowercase slug
        $this->slug_low = $this->makelower($this->slug);

        // We don't need those anymore
        unset($tmp_slug, $tmp_root, $tmp_name);

        // Check if the guess is correct enough
        if (!is_dir($this->root)) return $this->fail(3);

        // Check if the script requires to be in hook
        if (!function_exists('current_action')) return $this->fail(4);
        $this->hooked = (current_action() == '' ? false : true);

        // Add hook if it's required
        if (!$this->hooked) {

          // Hook the script to init
          add_action('admin_menu', [&$this, 'setup'], PHP_INT_MAX);

        } else {

          // The child plugin is already hooked, check if correctly
          if (current_action() == 'admin_menu' || isset($menu)) {

            // If the hook is correct continue
            $this->setup();

          } else {

            // Hook the script to init if it's not hooked to it already
            add_action('admin_menu', [&$this, 'setup'], PHP_INT_MAX);

          }

        }

      }

      /*
      * Main setup of this child plugin
      */
      public function setup() {

        // WordPress Global Variables
        global $menu;

        // Make sure $menu exists
        if (!isset($menu) || !is_array($menu)) return $this->fail(5);
        if (!current_user_can('install_plugins')) return $this->fail(10);

        // Get menu slug name
        if (!$this->menu_name($menu)) return false;

        if (/*$this->page === $this->menu && */!defined('INISEV_CAROUSEL')) {

          // Initialize Carousel constant
          define('INISEV_CAROUSEL', true);

          // Root URL for assets
          $this->url = trailingslashit(plugins_url('', $this->_root_file));

          // Load styles
          // wp_enqueue_script('inisev-carousel-script', ($this->url . 'assets/index.min.js'), [], filemtime($this->_root_dir . '/assets/index.min.js'), true);
          // wp_enqueue_style('inisev-carousel-style', ($this->url . 'assets/style.min.css'), [], filemtime($this->_root_dir . '/assets/style.min.css'));

          // Pass nonce to JS
          // wp_localize_script('inisev-carousel-script', 'inisev_carousel', [
          //   'nonce' => wp_create_nonce('inisev_carousel'),
          // ], true);

          // Print the footer
          if (!has_action('ins_global_print_carrousel')) {
            add_action('ins_global_print_carrousel', [&$this, '_print'], 1);
          }

        }

      }

      /*
      * This function may be used for debugging purposes
      */
      private function fail($code = false) {

        if ($code === false) {

          // Return error code if specified as request ($code === false)
          return $this->error;

        } else {

          // Set the error code and return
          // error_log($code);
          $this->error = $code;
          return false;

        }

      }

      /*
      * Helper function remove _ -/ characters and make lowercase
      */
      private function makelower($str) {
        
        if (!is_string($str) || empty($str)) $str = '';
        
        $str = str_replace('_', '', $str);
        $str = str_replace('-', '', $str);
        $str = str_replace('/', '', $str);
        $str = str_replace('\/', '', $str);
        $str = str_replace(' ', '', $str);
        $str = strtolower($str);

        return $str;

      }

      /*
      * This function will find slug of menu page
      */
      private function menu_name(&$menu) {

        // Find the menu slug
        // IMPORTANT: It requires the plugin to use own icon (own assets)
        foreach ($menu as $priority => $details) {
          if (is_array($details) && sizeof($details) >= 6) {
            foreach ($details as $key => $value) {
              if (is_object($value) || is_array($value)) continue;
              if ($this->makelower($value) == $this->slug_low) {
                $this->menu = $details[2];
                break;
              }
            }
            if (isset($this->menu)) break;
          }
        }

        // MyPopUps exception
        if (!isset($this->menu)) {
          $mpu = ['wpmypopups', 'mypopups', 'popuppopup'];
          if (in_array($this->slug_low, $mpu)) {
            $this->menu = 'wp-mypopups';
          }
        }

        if (!isset($this->menu)) {
          $bmi = ['backupbackup', 'backup-backup', 'backup-migration', 'backupmigration'];
          if (in_array($this->slug_low, $bmi)) {
            $this->menu = 'backup-migration';
          }
        }

        if (!isset($this->menu)) {
          $hhr = ['httpsremover', 'httphttpsremover'];
          if (in_array($this->slug_low, $hhr)) {
            $this->menu = 'httphttpsRemoval';
          }
        }

        if (!isset($this->menu)) {
          $wpc = ['wp-clone', 'wp-clone', 'wpclonebywpacademy'];
          if (in_array($this->slug_low, $wpc)) {
            $this->menu = 'wp-clone';
          }
        }

        // Make sure it found something
        if (isset($this->menu)) return true;
        else return true;
        // else return $this->fail(6);

      }

      /*
      * Helper: Include file
      */
      private function _include($path) {

        include_once trailingslashit($this->_root_dir) . 'views/' . $path . '.php';

      }

      /*
      * Helper: Get asset URL
      */
      private function get_asset($file) {

        return $this->url . $file;

      }

      /*
      * Helper: Get asset and print URL
      */
      private function _asset($file) {

        echo esc_url($this->get_asset('views/' . $file));

      }

      /*
      * Upgrade plugin, this function probably will never be fired
      */
      private function upgrade_plugin($plugin_slug) {

        // Include upgrader
        include_once ABSPATH . 'wp-admin/includes/class-wp-upgrader.php';
        wp_cache_flush();

        // Initialize & upgrade the plugin
        $upgrader = new \Plugin_Upgrader();
        $upgraded = $upgrader->upgrade($plugin_slug);

        // Return status or WP Error
        return $upgraded;

      }

      /*
      * Check if plugin is installed by slug
      */
      private function is_plugin_installed($slug) {

        // Get all plugins
        $all_plugins = get_plugins();

        // Make sure all slugs are in lowercase.
        foreach ($all_plugins as $plug => $v) {

          // Once something match return success
          if (strtolower($plug) == strtolower($slug)) return true;

        }

        // If nothing just fail
        return false;

        // When I exactly know the letter case...
        // if (!empty($all_plugins[$slug])) return true;
        // else return false;

      }

      /*
      * Install the plugin by slug
      */
      private function install_plugin($plugin_zip) {

        // Include upgrader
        include_once ABSPATH . 'wp-admin/includes/class-wp-upgrader.php';
        wp_cache_flush();

        // Initialize WP upgrader & install the plugin
        $upgrader = new \Plugin_Upgrader();
        $installed = $upgrader->install($plugin_zip);

        // Return status or WP Error
        return $installed;

      }

      /*
      * Install file
      */
      private function install($slug, $directory_slug) {

        // Prepare the URLs and full slug
        $plugin_slug = $slug;
        $plugin_zip = 'https://downloads.wordpress.org/plugin/' . $directory_slug . '.latest-stable.zip';

        // Make sure the plugin is not installed
        if ($this->is_plugin_installed($plugin_slug)) {

          // Upgrade the plugin if it's installed somehow
          $this->upgrade_plugin($plugin_slug);
          $installed = true;

          // Install instead
        } else $installed = $this->install_plugin($plugin_zip);

        // Check if there was any error
        if (!is_wp_error($installed) && $installed) {
          $activate = activate_plugin($plugin_slug);

          if (is_null($activate)) {

            $url = admin_url('', 'admin');

            // CDP has special alert when installed with quick-install module
            if ($_POST['slug'] === 'cdp') {
              update_option('_cdp_cool_installation', true);
              update_option('_cdp_redirect', true);
              $url = admin_url() . 'admin.php?page=copy-delete-posts';
            }

            // Redirection for MPU
            if ($_POST['slug'] === 'mpu') {
              update_option('wp_mypopups_do_activation_redirect', true);
              $url = admin_url() . 'admin.php?page=wp-mypopups';
            }

            // Redirection for USM
            if ($_POST['slug'] === 'usm') {
              update_option('sfsi_plugin_do_activation_redirect', true);
              $url = admin_url() . 'admin.php?page=sfsi-options';
            }

            // Redirection for BMI
            if ($_POST['slug'] === 'bmi') {
              update_option('_bmi_redirect', true);
              $url = admin_url() . 'admin.php?page=backup-migration';
            }

            // Redirection for RED
            if ($_POST['slug'] === 'redi') {
              update_option('irrp_activation_redirect', true);
              $url = admin_url() . 'admin.php?page=irrp-redirection';
            }

            // Send success
            wp_send_json_success([ 'installed' => true, 'url' => $url ]);

            // I don't know what happened here and if it's even possible
          } else wp_send_json_error();

          // Send fail
        } else wp_send_json_error();

      }

      /*
      * Add/print the Carousel
      */
      public function _print() {

        try {

          include_once trailingslashit($this->_root_dir) . 'views/index.php';

        } catch (\Exception $e) {

          return $this->fail(7);

        } catch (\Exception $e) {

          return $this->fail(8);

        }

      }

      /*
      * Handle ajax request
      */
      public function handle_installation() {

        if (check_ajax_referer('inisev_carousel', 'nonce', false) === false) {
          return wp_send_json_error();
        }

        if (!current_user_can('install_plugins')) {
          return wp_send_json_error();
        }

        // Handle the slug and install the plugin
        $slug = sanitize_text_field($_POST['slug']);
        if ($slug === 'usm') {

          $this->install($this->usm_slug, 'ultimate-social-media-icons');

        } elseif ($slug === 'bmi') {

          $this->install($this->bmi_slug, 'backup-backup');

        } elseif ($slug === 'cdp') {

          $this->install($this->cdp_slug, 'copy-delete-posts');

        } elseif ($slug === 'mpu') {

          $this->install($this->mpu_slug, 'pop-up-pop-up');

        } elseif ($slug == 'redi') {

          $this->install($this->redi_slug, 'redirect-redirection');

          // Anything else error
        } else wp_send_json_error();

      }

    }
  }

  // Disallow usage of multiple Carousels + allow only GET requests
  if (!defined('INISEV_CAROUSEL')) {

    // Make sure settings/menu page slug exsits
    if (!empty($_GET['page']) || (isset($_SERVER['REQUEST_METHOD']) && $_SERVER['REQUEST_METHOD'] === 'POST')) {

      // Initialize the Carousel
      $carousel = new Inisev_Carousel(__FILE__, __DIR__);

    }

  }