import { test } from 'node:test'
import assert from 'node:assert/strict'

import { navItemVisibleTo, allowedPathsFor, isAllowedPath } from '../src/lib/adminNav.js'

// Moderator confinement, derived from each row's `roles` (Phase 2 PR 8 —
// MODULE_SYSTEM.md §1.4). This replaced two hardcoded path lists that had
// drifted apart from each other, so the tests worth having are the ones that
// pin what a moderator may now see and reach, and the shape of the match.

// The real sidebar, trimmed to the rows that decide something here.
const NAV = [
  { items: [{ to: '/admin', label: 'Dashboard', end: true, roles: ['admin', 'editor', 'moderator'] }] },
  {
    title: 'Moderation',
    items: [
      { to: '/admin/moderation', label: 'Moderation', roles: ['admin', 'moderator'] },
      { to: '/admin/moderation/appeals', label: 'Appeals', roles: ['admin', 'moderator'] },
      { to: '/admin/shard-ops', label: 'In-Game Ops', roles: ['admin', 'moderator'] },
      { to: '/admin/houses', label: 'Houses', roles: ['admin', 'moderator'] },
    ],
  },
  {
    title: 'System',
    items: [
      { to: '/admin/users', label: 'Users', roles: ['admin'] },
      { to: '/admin/settings', label: 'Settings', roles: ['admin'] },
    ],
  },
  {
    items: [
      { to: '/admin/characters', label: 'My Characters' },
      { to: '/admin/account', label: 'Account' },
    ],
  },
]

const visibleTo = (role) =>
  NAV.flatMap((g) => g.items)
    .filter((i) => navItemVisibleTo(i, role))
    .map((i) => i.to)

test('a row with no roles is visible to every staff role', () => {
  // Self-service: staff are a superset of players, so a moderator reaching their
  // own characters is not a privilege, it is the thing every account has.
  for (const role of ['admin', 'editor', 'moderator']) {
    assert.equal(navItemVisibleTo({ to: '/admin/account' }, role), true)
  }
})

test('a role not named on the row cannot see it', () => {
  assert.equal(navItemVisibleTo({ to: '/admin/users', roles: ['admin'] }, 'moderator'), false)
  assert.equal(navItemVisibleTo({ to: '/admin/users', roles: ['admin'] }, 'admin'), true)
  // An unknown or absent role sees only the ungated rows.
  assert.equal(navItemVisibleTo({ to: '/admin/users', roles: ['admin'] }, undefined), false)
  assert.equal(navItemVisibleTo({ to: '/admin/account' }, undefined), true)
})

test('what a moderator sees is exactly the moderation section, plus self-service', () => {
  // The two additions the derivation makes over the old MOD_PATHS list are
  // Dashboard — whose roles have always named moderator, so the two lists
  // disagreed — and My Characters. Both are already permitted server-side.
  assert.deepEqual(visibleTo('moderator'), [
    '/admin',
    '/admin/moderation',
    '/admin/moderation/appeals',
    '/admin/shard-ops',
    '/admin/houses',
    '/admin/characters',
    '/admin/account',
  ])
})

test('an admin still sees everything and an editor still sees nothing extra', () => {
  assert.equal(visibleTo('admin').length, NAV.flatMap((g) => g.items).length)
  assert.deepEqual(visibleTo('editor'), ['/admin', '/admin/characters', '/admin/account'])
})

test('a row with `end` matches exactly — the dashboard is not a prefix', () => {
  // The bug this shape exists to prevent: treating `/admin` as a prefix would
  // make every path in the admin area allowed for anyone who can see Dashboard.
  const allowed = allowedPathsFor(NAV, 'moderator')
  assert.equal(isAllowedPath('/admin', allowed), true)
  assert.equal(isAllowedPath('/admin/users', allowed), false)
  assert.equal(isAllowedPath('/admin/users/12', allowed), false)
})

test('every other row covers its own sub-routes', () => {
  const allowed = allowedPathsFor(NAV, 'moderator')
  assert.equal(isAllowedPath('/admin/moderation/appeals/12', allowed), true)
  assert.equal(isAllowedPath('/admin/characters/0x4001', allowed), true)
})

test('a sibling path that merely shares a prefix is NOT covered', () => {
  const allowed = allowedPathsFor(NAV, 'moderator')
  // `/admin/houses-secret` starts with `/admin/houses` as a string; the match is
  // on path segments, so it does not start with `/admin/houses/`.
  assert.equal(isAllowedPath('/admin/houses-secret', allowed), false)
  assert.equal(isAllowedPath('/admin/houses/42', allowed), true)
})

test('Houses is reachable, which is the defect the derivation fixed', () => {
  // The redirect used to allow only /admin/moderation*, /admin/shard-ops* and
  // /admin/account, while the sidebar showed Houses — so a moderator clicking a
  // row in their own nav was bounced back to Moderation.
  const allowed = allowedPathsFor(NAV, 'moderator')
  assert.equal(isAllowedPath('/admin/houses', allowed), true)
})

test('a module row a moderator may see is reachable without core listing it', () => {
  // The reason this is derived at all: core cannot hardcode a path it has never
  // heard of, and a module row arrives with `roles` like any other.
  const withModule = [
    ...NAV,
    { title: 'Shard', items: [{ to: '/admin/uo/shard-ops', label: 'Ops', roles: ['admin', 'moderator'], moduleId: 'uo' }] },
  ]
  const allowed = allowedPathsFor(withModule, 'moderator')
  assert.equal(isAllowedPath('/admin/uo/shard-ops', allowed), true)
  assert.equal(isAllowedPath('/admin/uo/shard-ops/queue', allowed), true)
})

test('a nav that is not there does not throw', () => {
  assert.deepEqual(allowedPathsFor(null, 'moderator'), [])
  assert.equal(isAllowedPath('/admin', undefined), false)
})