<?php

/**
 * The admin-specific functionality of the plugin.
 *
 * @link       http://pixelative.co
 * @since      1.0.0
 *
 * @package    Amp_WP
 * @subpackage Amp_WP/admin
 */

/**
 * The admin-specific functionality of the plugin.
 *
 * Defines the plugin name, version, and two examples hooks for how to
 * enqueue the admin-specific stylesheet and JavaScript.
 *
 * @package    Amp_WP
 * @subpackage Amp_WP/admin
 * @author     Pixelative <mohsin@pixelative.co>
 */
class Amp_WP_Admin {
    /**
	 * The ID of this plugin.
	 *
	 * @since    1.0.0
	 * @access   private
	 * @var      string    $plugin_name    The ID of this plugin.
	 */
    private $plugin_name;

    /**
	 * The version of this plugin.
	 *
	 * @since    1.0.0
	 * @access   private
	 * @var      string    $version    The current version of this plugin.
	 */
    private $version;

    /**
	 * Initialize the class and set its properties.
	 *
	 * @since    1.0.0
	 * @param      string    $plugin_name       The name of this plugin.
	 * @param      string    $version    The version of this plugin.
	 */
    public function __construct( $plugin_name, $version ) {
        $this->plugin_name = $plugin_name;
        $this->version = $version;
        
        if( get_transient( 'amp-wp-flush-rules' ) ) {
            add_action( 'admin_init', 'flush_rewrite_rules' );
            delete_transient( 'amp-wp-flush-rules' );
        }
        
        add_action( 'admin_menu', array( $this, 'amp_wp_admin_links' ), 999 );
        add_action('admin_bar_menu', array( $this, 'amp_wp_add_toolbar_item' ), 100);
		
		/**
		 * Classes responsible for defining all actions that occur in the admin area.
		 */
		require_once AMPWP_TEMPLATE_DIR_PATH . 'includes/admin/class-amp-wp-settings.php';
		require_once AMPWP_TEMPLATE_DIR_PATH . 'includes/customizer/class-amp-wp-customize.php';
		require_once AMPWP_TEMPLATE_DIR_PATH . 'includes/admin/class-amp-wp-add-ons.php';
        
		/**
		 * The class responsible for orchestrating the actions and filters of the
		 * core plugin.
		 */
        require_once AMPWP_TEMPLATE_DIR_PATH . 'admin/class-amp-wp-meta-box.php';
        
        // Filter -> Footer Branding - with Pixelative Logo
        add_filter('admin_footer_text', array( $this, 'amp_wp_powered_by' ));
    }

	/**
	 * Register the stylesheets for the admin area.
	 *
	 * @since    1.0.0
	 */
    public function enqueue_styles() {
        wp_enqueue_style( $this->plugin_name, plugin_dir_url( __FILE__ ) . 'css/amp-wp-admin.css', array(), $this->version, 'all' );
    }
	
	/**
	 * Register the JavaScript for the admin area.
	 *
	 * @since    1.0.0
	 */
    public function enqueue_scripts() {
        wp_enqueue_script( $this->plugin_name, plugin_dir_url( __FILE__ ) . 'js/amp-wp-admin.js', array( 'jquery' ), $this->version, false );
    }
    
    public function amp_wp_admin_links() {
        add_menu_page(
            'AMP WP', // string $page_title
            'AMP WP', // string $menu_title
            'manage_options', // string $capability
            'amp-wp-welcome', // string $menu_slug
            array( $this, 'amp_wp_welcome' ), // callable $function
            plugins_url( 'amp-wp/admin/images/amp-wp-icon.svg' ),  // string $icon_url
            25 // int $position
        );
        add_submenu_page(
            'amp-wp-welcome', // string $parent_slug
            'Welcome', // string $page_title
            'Welcome', // string $menu_title
            'manage_options', // string $capability
            'amp-wp-welcome' // string $menu_slug
        );
    }
    
    public function amp_wp_welcome() {
        $tab = filter_input(INPUT_GET, 'tab');
        if( 'credits' === $tab ) :
            require_once AMPWP_TEMPLATE_DIR_PATH . 'admin/partials/amp-wp-admin-credits.php';    
        else:
            require_once AMPWP_TEMPLATE_DIR_PATH . 'admin/partials/amp-wp-admin-welcome.php';    
        endif;
    }
    
    /**
     * Check If the admin page is from AMP WP.
     * 
     * @since   1.0.0
     */
    public function is_amp_wp_admin_pages() {
        $screen = get_current_screen();
        return ( 'amp-wp-welcome' === $screen->parent_base ) ? true : false;
    }
    
	/**
	 * Add AMP Link to Admin Bar
	 * 
	 * @param   object  $admin_bar
	 * @since   1.0.0
	 * @access  public
	 * @return  void
	 */
    public function amp_wp_add_toolbar_item( $wp_admin_bar ) {
        $wp_admin_bar->add_menu( array(
            'parent' => 'site-name',
            'id'    => 'view-amp',
            'title' => __('Visit AMP', 'amp-wp'),
            'href'   => amp_wp_site_url(),
            'meta'  => false,
        ));
    }
    
	/**
	 * Replace admin footer text with Brand.
	 *
	 * @since    1.0.0
	 */
    public function amp_wp_powered_by($text) {
        if( is_admin() && $this->is_amp_wp_admin_pages() ) {
            $text = '<a href="' . esc_url( 'https://pixelative.co' ) . '" target="_blank"><img src="' . untrailingslashit( plugins_url(basename(plugin_dir_path(__DIR__) ), basename(__DIR__))) . '/admin/images/pixelative.png" alt="Powered by Pixlative"></a>';
        }
        return $text;
    }
}

/**
 * AMP WP Version Check
 * 
 * @since 1.2.0
 */
function amp_wp_version_check_using_wpapi() {
	$url = 'https://api.wordpress.org/plugins/info/1.0/amp-wp.json';
	$response = wp_remote_get($url);
	
	// Check for error
	if( is_wp_error( $response ) ) {
		return;
	}
	
	// Parse remote HTML file
	$data = json_decode( wp_remote_retrieve_body( $response ) );
	
	// Check for error
	if( is_wp_error( $data ) ) {
		return;
	}
	
	if( !empty( $data ) ) {
		return $data->version;
	}
}