<?php
/**
 * Compatibility abstract class
 *
 * Must be extends in every compatibility module.
 * @todo check if the plugin Active or not.
 *
 * @class ICompatibility
 */

namespace wpCloud\StatelessMedia {

  abstract class ICompatibility {
    protected $id = '';
    protected $title = '';
    /**
     * // Type String or Array.
     *
     * Single constant:
     * example "WP_STATELESS_COMPATIBILITY_EDD"
     *
     * Multiple constant:
     * [Constant, Another_Constant, ....]
     * ['WP_STATELESS_MEDIA_ON_FLY', 'WP_STATELESS_DYNAMIC_IMAGE_SUPPORT']
     *
     * Deprecated constant:
     * [Old Constant => New Constant, ...]
     * ['WP_STATELESS_MEDIA_ON_FLY' => 'WP_STATELESS_DYNAMIC_IMAGE_SUPPORT']
     */
    protected $constant = '';
    protected $enabled = false;
    protected $description = '';
    protected $plugin_file = null;
    protected $theme_name = null;
    protected $first_party = false;
    protected $non_library_sync = false;
    protected $server_constant = false;
    protected $sm_mode_required = '';
    protected $sm_mode_not_supported = [];

    public function __construct() {
      $this->init();
    }

    /**
     * Checking whether the plugin is active or not.
     * If the plugin_file is specified then check whether plugin is active or not.
     * We can't use is_plugin_active function because it's defined later in init.
     * By default return true.
     *
     * @todo caching.
     */
    public function is_plugin_active() {
      if (!empty($this->theme_name)) {
        $theme = wp_get_theme();
        if ($theme->Name == $this->theme_name) {
          return true;
        }

        $parent_theme = $theme->parent();
        if (is_a($parent_theme, 'WP_Theme') && $parent_theme->Name == $this->theme_name) {
          return true;
        }

        return false;
      }

      if (!empty($this->plugin_file)) {
        // Converting string to array for foreach
        if (is_string($this->plugin_file)) {
          $this->plugin_file = array($this->plugin_file);
        }

        // If multisite then check if plugin is network active
        if (is_multisite()) {
          $active_plugins = (array)get_site_option('active_sitewide_plugins');
          foreach ($this->plugin_file as $plugin_file) {
            if (isset($active_plugins[$plugin_file])) {
              return true;
            }
          }

          // If we are in network admin then return, unless it will get data from main site.
          if (is_network_admin()) {
            return false;
          }
        }

        $active_plugins = (array)get_option('active_plugins', array());
        foreach ($this->plugin_file as $plugin_file) {
          if (in_array($plugin_file, $active_plugins)) {
            return true;
          }
        }

        return false;
      }

      /**
       * If server constant is set - check if exist it on global $_SERVER
       */
      if (!empty( $this->server_constant )) {
        if ( isset($_SERVER[ $this->server_constant ]) ) {
          return true;
        }
        return false;
      }

      return true;
    }

    /**
     * Checking whether current mode is supported.
     * By default return true.
     *
     * @todo caching.
     */
    public function is_mode_supported () {
      $sm_mode = isset($_POST['sm']['mode']) ? $_POST['sm']['mode'] : ud_get_stateless_media()->get( 'sm.mode' );
      if ( in_array( $sm_mode, $this->sm_mode_not_supported ) ) {
        return false;
      }
      return true;
    }

    /**
     * Initialize the module
     * Check whether plugin is active or not.
     * Register module.
     *
     * Add action for sm::module::init hook for module_init, which is fired(do_action) on Bootstrap::init()
     */
    public function init() {
      $is_constant = false;
      $is_network_override = false;
      $sm_mode = isset($_POST['sm']['mode']) ? $_POST['sm']['mode'] : ud_get_stateless_media()->get( 'sm.mode' );
      if (is_network_admin()) {
        $this->enabled = null;
      }

      if (is_array($this->constant)) {
        foreach ($this->constant as $old_const => $new_const) {
          if (defined($new_const)) {
            $is_constant = true;
            $this->enabled = constant($new_const);
            break;
          }
          if (is_string($old_const) && defined($old_const)) {
            $is_constant = true;
            $this->enabled = constant($old_const);
            ud_get_stateless_media()->errors->add(array(
              'key' => $this->id,
              'title' => sprintf(__("%s: Deprecated Notice (%s)", ud_get_stateless_media()->domain), ud_get_stateless_media()->name, $this->title),
              'message' => sprintf(__("<i>%s</i> constant is deprecated, please use <i>%s</i> instead.", ud_get_stateless_media()->domain), $old_const, $new_const),
            ), 'notice');
            break;
          }
        }
      } elseif (defined($this->constant)) {
        $this->enabled = constant($this->constant);
        $is_constant = true;
      }

      if (!$is_constant) {
        $modules = get_option('stateless-modules', array());
        if (empty($this->enabled)) {
          $this->enabled = !empty($modules[$this->id]) && $modules[$this->id] == 'true' ? true : false;
        }
        if (is_multisite()) {
          $modules = get_site_option('stateless-modules', array());
          if (is_network_admin()) {
            $this->enabled = !empty($modules[$this->id]) ? ($modules[$this->id] == 'true' ? true : false) : '';
          } elseif (!empty($modules[$this->id])) {
            $this->enabled = !empty($modules[$this->id]) ? ($modules[$this->id] == 'true' ? true : false) : '';
            $is_network_override = true;
          }
        }
      }

      if (!is_network_admin() && ( !$this->is_plugin_active() || !$this->is_mode_supported() )) {
        $this->enabled = 'inactive';
      }

      /**
       * Checking whether to show manual sync option.
       */
      if ($this->is_plugin_active() && $this->non_library_sync == true) {
        global $show_non_library_sync;
        $show_non_library_sync = true;
      }

      Module::register_module(array(
        'id' => $this->id,
        'self' => $this,
        'title' => $this->title,
        'enabled' => $this->enabled,
        'description' => $this->description,
        'is_constant' => $is_constant,
        'is_network_override' => $is_network_override,
        'is_plugin_active' => $this->is_plugin_active(),
        'is_network_admin' => is_network_admin(),
        'is_plugin' => !empty($this->plugin_file),
        'is_theme' => !empty($this->theme_name),
        'is_mode_supported' => $this->is_mode_supported(),
        'mode' => ucfirst( $sm_mode )
      ));

      if ($this->enabled && $this->is_plugin_active() && $this->is_mode_supported()) {
        add_action('sm::module::init', array($this, 'module_init'));
      }

      if (!$this->enabled && !$this->first_party && $this->is_plugin_active()) {
        ud_get_stateless_media()->errors->add(array(
          'key' => $this->id,
          'title' => sprintf(__("%s: Compatibility for %s isn't enabled.", ud_get_stateless_media()->domain), ud_get_stateless_media()->name, $this->title),
          'button' => __("Enable Compatibility", ud_get_stateless_media()->domain),
          'message' => __("Please enable the compatibility to ensure the functionality will work properly between <b>{$this->title}</b> and <b>WP-Stateless</b>.", ud_get_stateless_media()->domain),
        ), 'notice');
      }

      /**
       * Check requires WP-Stateless mode
       */
      if ( !empty( $this->sm_mode_required ) && $this->enabled !== 'inactive' ) {
        if ( $sm_mode !== $this->sm_mode_required ) {
          ud_get_stateless_media()->errors->add( array(
            'key' => $this->id,
            'title' => sprintf( __( "%s: Current Mode is not compatible with  %s.", ud_get_stateless_media()->domain ), ud_get_stateless_media()->name, $this->title ),
            'message' => sprintf( __( "%s compatibility requires %s in %s mode.", ud_get_stateless_media()->domain ), $this->title, ud_get_stateless_media()->name, ucfirst( $this->sm_mode_required ) ),
          ), 'notice' );
        }
      }
    }

    /**
     * @return bool
     */
    public function enable_compatibility() {

      if (is_network_admin()) {
        $modules = get_site_option('stateless-modules', array());
        if (empty($modules[$this->id]) || $modules[$this->id] != 'true') {
          $modules[$this->id] = 'true';
          update_site_option('stateless-modules', $modules, true);
        }
      } else {
        $modules = get_option('stateless-modules', array());
        if (empty($modules[$this->id]) || $modules[$this->id] != 'true') {
          $modules[$this->id] = 'true';
          update_option('stateless-modules', $modules, true);
        }
      }

      return true;
    }

    /**
     * add_webp_mime
     * @param $t
     * @param $user
     * @return mixed
     */
    public function add_webp_mime($t, $user) {
      $t['webp'] = 'image/webp';
      return $t;
    }
  }

}