import path from 'node:path';
import { readJson } from '../../utils/fs.js';
import type {
  WorkspaceModuleConfig,
  WorkspacePackageJson,
} from '../../config/workspaceManifest.js';

export function assertNoSsgRoutesInModuleConfig(
  moduleConfig: WorkspaceModuleConfig | undefined,
): void {
  const routes = moduleConfig?.routes ?? [];
  if (!Array.isArray(routes) || routes.length === 0) {
    return;
  }

  const hasSsgRoute = routes.some((route) => {
    if (!route || typeof route !== 'object') {
      return false;
    }

    const renderMode =
      typeof route.renderMode === 'string' ? route.renderMode.toLowerCase() : undefined;
    const hasStaticPaths = Array.isArray(route.staticPaths) && route.staticPaths.length > 0;
    const hasSsgBlock = route.ssg !== undefined;

    return renderMode === 'ssg' || hasStaticPaths || hasSsgBlock;
  });

  if (!hasSsgRoute) {
    return;
  }

  throw new Error(
    "SSG publish expects SSG metadata under `webstir.moduleManifest.views`, not `webstir.moduleManifest.routes`. Move `renderMode: 'ssg'`, `staticPaths`, and/or `ssg` onto the corresponding view definition.",
  );
}

export async function assertNoSsgRoutes(workspaceRoot: string): Promise<void> {
  const pkgPath = path.join(workspaceRoot, 'package.json');
  const pkg = await readJson<WorkspacePackageJson>(pkgPath);
  const moduleConfig = pkg?.webstir?.moduleManifest;
  assertNoSsgRoutesInModuleConfig(moduleConfig);
}