import assert from 'node:assert/strict'

let selectSidebarRoutes
let getSubsystemHomePath

try {
  ({ selectSidebarRoutes, getSubsystemHomePath } = await import('../src/router/sidebarRouteUtils.js'))
} catch {
  // The first RED run intentionally reaches this branch before the helper exists.
}

assert.equal(typeof selectSidebarRoutes, 'function', 'sidebar routing must be selected by a shared route helper')
assert.equal(typeof getSubsystemHomePath, 'function', 'subsystem fallback navigation must use canonical route prefixes')

const routes = [
  { path: '/index' },
  { path: '/system' },
  { path: '/subSystem/gas' },
  { path: '/subSystem/waterSupply' },
  { path: '/waterSupply' },
  { path: '/pipeNetwork' }
]

assert.deepEqual(
  selectSidebarRoutes('/system/menu', routes).map(route => route.path),
  ['/index', '/system'],
  'admin pages must not display subsystem routes, including legacy aliases'
)

assert.deepEqual(
  selectSidebarRoutes('/subSystem/waterSupply/whome', routes).map(route => route.path),
  ['/subSystem/waterSupply'],
  'the water subsystem must display only its own dynamic route tree'
)

assert.equal(
  getSubsystemHomePath('waterSupply'),
  '/subSystem/waterSupply/index',
  'water fallback navigation must target the backend route namespace'
)

console.log('sidebarRouteUtils tests passed')