<?php
/**
 * Getting Started screen: overview and one-click check page.
 *
 * @package NovoVerify
 */

defined( 'ABSPATH' ) || exit;

/**
 * Creates the check page and renders the Getting Started screen.
 */
final class NovoVerify_Getting_Started {

	/**
	 * Action name (admin-post.php) that creates the check page.
	 */
	const ACTION = 'novoverify_create_page';

	/**
	 * Option that stores the ID of the created check page.
	 */
	const PAGE_OPTION = 'novoverify_check_page_id';

	/**
	 * Registers hooks.
	 */
	public function __construct() {
		add_action( 'admin_post_' . self::ACTION, array( $this, 'create_page' ) );
	}

	/**
	 * The check page, if it still exists and is not in the trash.
	 *
	 * @return WP_Post|null
	 */
	public static function check_page() {
		$page = get_post( (int) get_option( self::PAGE_OPTION ) );
		return $page && 'page' === $page->post_type && 'trash' !== $page->post_status ? $page : null;
	}

	/**
	 * Creates and publishes a page containing the check block.
	 */
	public function create_page() {
		if ( ! current_user_can( NovoVerify_Config::CAPABILITY ) || ! current_user_can( 'publish_pages' ) ) {
			wp_die( esc_html__( 'You do not have permission to access this page.', 'novoverify' ), 403 );
		}
		check_admin_referer( self::ACTION );

		$page = self::check_page();
		if ( ! $page ) {
			$page_id = wp_insert_post(
				array(
					'post_type'    => 'page',
					'post_status'  => 'publish',
					'post_title'   => __( 'Verify your product', 'novoverify' ),
					'post_name'    => sanitize_title( _x( 'verify', 'page slug of the check page', 'novoverify' ) ),
					'post_content' => '<!-- wp:novoverify/check /-->',
				),
				true
			);

			if ( is_wp_error( $page_id ) ) {
				wp_safe_redirect( add_query_arg( 'novoverify_notice', 'page_failed', admin_url( 'admin.php?page=novoverify' ) ) );
				exit;
			}
			update_option( self::PAGE_OPTION, (int) $page_id, false );
		}

		wp_safe_redirect( add_query_arg( 'novoverify_notice', 'page_created', admin_url( 'admin.php?page=novoverify' ) ) );
		exit;
	}

	/**
	 * Renders the screen.
	 */
	public function render() {
		if ( ! current_user_can( NovoVerify_Config::CAPABILITY ) ) {
			wp_die( esc_html__( 'You do not have permission to access this page.', 'novoverify' ) );
		}

		$page        = self::check_page();
		$code_counts = NovoVerify_DB::count_codes_by_status();
		$stats       = array(
			'codes'       => $code_counts['all'],
			'checks'      => NovoVerify_DB::count_checks(),
			'checks_week' => NovoVerify_DB::count_checks_since( WEEK_IN_SECONDS ),
		);
		$recent      = NovoVerify_DB::get_recent_checks( 5 );

		// phpcs:ignore WordPress.Security.NonceVerification.Recommended -- Display only.
		$notice = isset( $_GET['novoverify_notice'] ) ? sanitize_key( wp_unslash( $_GET['novoverify_notice'] ) ) : '';

		include NOVOVERIFY_PATH . 'admin/views/getting-started.php';
	}
}