/**
 * lib/navroute-parser.ts — Extract [NavRoute] attributes from C# files.
 * Ported from SmartStack.cli/src/mcp/lib/navroute-parser.ts.
 *
 * NavRoute is a SmartStack-specific attribute placed on controllers to declare
 * the navigation path the controller serves (e.g. [NavRoute("hr.employees")]).
 * Frontend routing and permission seeding are derived from these attributes.
 */

export interface ParsedNavRoute {
  /** Base path (e.g. "administration.users") */
  navRoute: string;
  /** Optional sub-path (e.g. "dashboard") */
  suffix?: string;
  /** Full path including suffix (e.g. "administration.users.dashboard") */
  fullNavRoute: string;
  /** True if inferred from [Route("api/...")] because no [NavRoute] was found */
  inferred?: boolean;
}

/**
 * Extract every [NavRoute(...)] attribute from a C# file's content.
 * Uses matchAll() to capture multiple attributes per file.
 *
 * Fallback: if no [NavRoute] is found, infer from [Route("api/...")] attributes
 * by converting the URL path to a dot-path.
 */
export function extractNavRoutes(content: string): ParsedNavRoute[] {
  const results: ParsedNavRoute[] = [];
  const regex = /\[NavRoute\s*\(\s*"([^"]+)"(?:\s*,\s*Suffix\s*=\s*"([^"]+)")?\s*\)\]/g;

  for (const match of content.matchAll(regex)) {
    const navRoute = match[1];
    const suffix = match[2];
    const fullNavRoute = suffix ? `${navRoute}.${suffix}` : navRoute;
    results.push({ navRoute, suffix, fullNavRoute });
  }

  if (results.length === 0) {
    const routeRegex = /\[Route\s*\(\s*"api\/([^"]+)"\s*\)\]/g;
    for (const match of content.matchAll(routeRegex)) {
      const routePath = match[1];
      // Skip template routes like api/[controller]
      if (routePath.includes('[')) continue;
      const navRoute = routePath.replace(/\//g, '.');
      results.push({ navRoute, fullNavRoute: navRoute, inferred: true });
    }
  }

  return results;
}