<?php
/**
 * Copyright © Rob Art | Illustration 2026
 *
 * RobArt CatchNet — tier resolution (always loaded, free build included).
 *
 * The FREE build contains NO licence-validation, licence-server or dev-bypass code — all
 * of that lives in the Pro distribution (pro/dev-bypass.php) and is excluded from the
 * WordPress.org build. This file only RESOLVES the current tier: it returns 'free' unless
 * the Pro add-on supplies a signed dev bypass or a validated licence (checked via
 * function_exists, so the free build simply has nothing to call). An optional admin
 * bypass for the owner's own use is the only Pro path present in the free code, and it
 * grants nothing to visitors or non-admins.
 *
 * @package RobArtCatchNet
 */

if ( ! defined( 'ABSPATH' ) ) exit;

/**
 * One-time migration of the plugin's stored data from the old `rccn_` prefix to the
 * current `racn_` prefix (the code-prefix rename). Pre-release plugin, so this exists
 * only to carry across settings saved by an earlier dev build; it runs once, guarded by
 * the `racn_prefix_migrated` flag, and copies old→new only when the new key is absent.
 *
 * @return void
 */
function racn_migrate_prefixed_data() {
	if ( get_option( 'racn_prefix_migrated' ) ) return;

	// option name => default sentinel used to detect "new key absent".
	$opts = array( 'racn_ghost_rest', 'racn_ghost_hover', 'racn_export_format', 'racn_licence' );
	foreach ( $opts as $new ) {
		$old = 'rccn_' . substr( $new, 5 );
		if ( false === get_option( $new, false ) ) {
			$old_val = get_option( $old, false );
			if ( false !== $old_val ) {
				update_option( $new, $old_val );
			}
		}
	}

	// Transient: tier cache (racn_tier_cache <- rccn_tier_cache).
	if ( false === get_transient( 'racn_tier_cache' ) ) {
		$old_tier = get_transient( 'rccn_tier_cache' );
		if ( false !== $old_tier ) {
			set_transient( 'racn_tier_cache', $old_tier, HOUR_IN_SECONDS * 6 );
		}
	}

	update_option( 'racn_prefix_migrated', 1 );
}
add_action( 'plugins_loaded', 'racn_migrate_prefixed_data' );

/**
 * Normalise a site URL for binding: strip scheme + trailing slash so http/https and
 * slash variants of the same install compare equal (the classic verification bug).
 *
 * @param string $url
 * @return string
 */
function racn_normalise_site_url( $url ) {
	return untrailingslashit( preg_replace( '#^https?://#i', '', (string) $url ) );
}

/**
 * The active tier: 'free' | 'pro'.
 *
 * @return string
 */
function racn_tier() {
	// 1. Admin bypass — RACN_ADMIN_PRO grants Pro to logged-in admins on any site. For the
	//    owner's own use where entering a licence is unnecessary; visitors and non-admins
	//    are unaffected. No licence engine required, so it is safe in the free build.
	if ( defined( 'RACN_ADMIN_PRO' ) && RACN_ADMIN_PRO
		&& function_exists( 'current_user_can' ) && current_user_can( 'manage_options' ) ) {
		return 'pro';
	}

	// 2. Developer bypass — supplied ONLY by the Pro distribution (pro/dev-bypass.php). The
	//    free build ships no such function, so this is inert there.
	if ( function_exists( 'racn_dev_bypass_tier' ) ) {
		$dev = racn_dev_bypass_tier();
		if ( '' !== $dev ) {
			return $dev;
		}
	}

	// 3. Real licence — validated ONLY by the Pro distribution (pro/dev-bypass.php). Cached
	//    6h. Absent in the free build → tier stays 'free'.
	if ( function_exists( 'racn_validate_licence' ) ) {
		$cached = get_transient( 'racn_tier_cache' );
		if ( false !== $cached ) return $cached;

		$tier = racn_validate_licence() ?: 'free';
		set_transient( 'racn_tier_cache', $tier, HOUR_IN_SECONDS * 6 );
		return $tier;
	}

	return 'free';
}