import type { Router } from 'express'
import type { ServiceContainer } from './container.js'
import type { ApiModule, ModuleMetadata, ModuleLifecycle } from './types.js'
import type { ApiModuleConfig, ModuleEndpoints } from '../../shared/modules/types.js'

export interface CreateModuleOptions<TEndpoints extends ModuleEndpoints> {
  routes: (container: ServiceContainer) => Router | Promise<Router>
  lifecycle?: ModuleLifecycle
  services?: (container: ServiceContainer) => void | Promise<void>
}

export function createApiModule<
  TId extends string,
  TEndpoints extends ModuleEndpoints
>(
  config: ApiModuleConfig<TId, TEndpoints>,
  options: CreateModuleOptions<TEndpoints>
): ApiModule {
  const metadata: ModuleMetadata = {
    id: config.id,
    name: config.name,
    version: config.version,
    basePath: config.basePath,
    order: config.order,
    dependencies: config.dependencies,
  }

  const lifecycle: ModuleLifecycle | undefined = options.lifecycle
    ? options.lifecycle
    : options.services
      ? {
          onLoad: options.services,
        }
      : undefined

  return {
    metadata,
    lifecycle,
    createRouter: options.routes,
  }
}