// Reserved-name screening (docs/website/TEAMS.md §2.8).
//
// Two failure modes with very different costs, and the tests are split along
// that line:
//
//   - a FALSE NEGATIVE puts an official-looking staff page on the operator's own
//     site, written by whoever typed a name into a guild stone;
//   - a FALSE POSITIVE hides a legitimate guild until a human glances at a queue.
//
// The second is cheap and recoverable, which is what lets the matcher be
// conservative. It is not licence to be sloppy in the other direction: a check
// that fires on "Badminton" is a check the operator switches off, and then the
// first cost is paid in full.
const { test, beforeEach, afterEach } = require('node:test')
const assert = require('node:assert/strict')

const settings = require('../src/model/settings/settings.model')
const brand = require('../src/config/brand')
const reserved = require('../src/utils/reservedNames')

const saved = []
function patch(mod, name, fn) {
  saved.push([mod, name, mod[name]])
  mod[name] = fn
}

beforeEach(() => {
  // A deployment with a two-word brand and no operator additions, which is the
  // shape that exercises the condensed-form rule.
  patch(settings, 'getInstanceName', async () => 'UO Mysticmoon')
  patch(settings, 'get', async () => null)
})

afterEach(() => {
  while (saved.length) {
    const [mod, name, fn] = saved.pop()
    mod[name] = fn
  }
})

const isReserved = async (name) => (await reserved.screen(name)).reserved
const termFor = async (name) => (await reserved.screen(name)).term

// ── The names this exists to catch ─────────────────────────────────────────

test('bare role names are reserved', async () => {
  for (const name of ['Admin', 'admin', 'ADMIN', 'Moderator', 'Staff', 'Owner', 'GM', 'Administrator']) {
    assert.equal(await isReserved(name), true, `"${name}" must not become a public page`)
  }
})

test('a role word inside a longer name is caught', async () => {
  for (const name of ['The Admin Team', 'Server Staff', 'GM Council', 'Guild of Moderators']) {
    assert.equal(await isReserved(name), true, `"${name}" is the impersonation this exists for`)
  }
})

test('the deployment brand is reserved, in both presentations', async () => {
  assert.equal(await isReserved('UO Mysticmoon'), true)
  assert.equal(await isReserved('UOMysticmoon'), true, 'the condensed form is what an impersonator types')
  assert.equal(await isReserved('uo-mysticmoon'), true)
  assert.equal(await isReserved('UO_MYSTICMOON'), true)
  assert.equal(await isReserved('UOMysticmoon Staff'), true)
})

test('the project name is reserved, in both of its legitimate presentations', async () => {
  // "Runic Gateway" is correct; "RunicGateway" is what the Gitea org and every
  // URL segment use, so it is the form someone would copy.
  assert.equal(await isReserved('Runic Gateway'), true)
  assert.equal(await isReserved('RunicGateway'), true)
  assert.equal(await isReserved('runic-gateway'), true)
  assert.equal(await isReserved('Runic_Gateway'), true)
  assert.equal(await isReserved('RUNIC GATEWAY'), true)
})

test('operator additions are honoured', async () => {
  patch(settings, 'get', async (key) => (key === reserved.OPERATOR_TERMS_KEY ? 'Council, Arbiter' : null))
  assert.equal(await isReserved('The Council'), true)
  assert.equal(await isReserved('Arbiter'), true)
})

test('repeated characters are squeezed', async () => {
  assert.equal(await isReserved('Adminnn'), true)
  assert.equal(await isReserved('Staaaff'), true)
})

test('punctuation between words does not evade the check', async () => {
  assert.equal(await isReserved('[Admin]'), true)
  assert.equal(await isReserved('~*~ Staff ~*~'), true)
  assert.equal(await isReserved('G.M.'), true)
})

test('the matched term is reported, for the review queue', async () => {
  assert.equal(await termFor('The Admin Team'), 'admin')
  assert.equal(await termFor('UOMysticmoon'), 'UO Mysticmoon', 'shown in its stored form, not the input')
})

// ── The names it must NOT catch ────────────────────────────────────────────

test('a word merely CONTAINING a reserved term is not reserved', async () => {
  // The scar tissue this rule comes from: checkModuleIdentifiers.js tokenises
  // precisely so `defaultImage` does not match "ultIma".
  for (const name of ['Badminton', 'Badminton Club', 'Modest Proposal', 'Gmork', 'Playerless']) {
    assert.equal(await isReserved(name), false, `"${name}" is a false positive that would discredit the check`)
  }
})

test('ordinary guild names pass', async () => {
  for (const name of [
    'The Silver Hand', 'Knights of the Round', 'Dread Pirates', 'Moonlight Traders',
    'The Guardians', 'Iron Wolves',
  ]) {
    assert.equal(await isReserved(name), false, `"${name}" is an ordinary guild`)
  }
})

test('the condensed-form widening applies only to multi-word terms', async () => {
  // Running the letters together is safe for a two-word term because it is
  // specific; doing it for single-word terms is what would re-introduce
  // substring matching through the back door.
  assert.equal(await isReserved('Badminton'), false)
  assert.equal(await isReserved('Grandmaster'), false, 'contains "gm" only as a substring')
  assert.equal(await isReserved('Nomads'), false, 'contains "mod" only as a substring')
})

test('an empty or unusable name is not reserved', async () => {
  for (const name of ['', '   ', null, undefined, '★☆★']) {
    assert.equal(await isReserved(name), false)
  }
})

// ── Resolution is at check time, and fails safe ────────────────────────────

test('the brand is resolved at CHECK time, so a rename protects the new name', async () => {
  patch(settings, 'getInstanceName', async () => 'Dragonspire')
  assert.equal(await isReserved('Dragonspire'), true)

  patch(settings, 'getInstanceName', async () => 'Emberfall')
  assert.equal(await isReserved('Emberfall'), true, 'no redeploy should be needed to protect a new brand')
})

test('a failed settings read falls back to the static terms rather than to none', async () => {
  // Screening fewer terms is bad; screening none is the entire hole.
  patch(settings, 'getInstanceName', async () => { throw new Error('db down') })
  patch(settings, 'get', async () => { throw new Error('db down') })

  assert.equal(await isReserved('Admin'), true, 'the role list must survive a database outage')
  assert.equal(await isReserved('Runic Gateway'), true)
})

test('BRAND_NAME is covered even when no site_title is set', async () => {
  patch(settings, 'getInstanceName', async () => null)
  assert.equal(await isReserved(brand.name), true)
})

test('the same term resolved twice is listed once', async () => {
  // The brand and an operator term are frequently the same word, and reporting
  // one match twice is noise in a queue a human reads.
  patch(settings, 'getInstanceName', async () => 'Dragonspire')
  patch(settings, 'get', async (key) => (key === reserved.OPERATOR_TERMS_KEY ? 'dragonspire' : null))
  const terms = await reserved.reservedTerms()
  const normalised = terms.map((t) => reserved.normalise(t))
  assert.equal(new Set(normalised).size, normalised.length)
})

test('normalise folds case, diacritics and punctuation', () => {
  assert.equal(reserved.normalise('Ünderdärk!'), 'underdark')
  assert.equal(reserved.normalise('  The   Silver  Hand '), 'the silver hand')
  assert.equal(reserved.normalise('Adminnn'), 'admin', 'repeats are squeezed on both sides')
})

test('plurals are caught, and near-misses are not', async () => {
  // "Moderators" is the more natural guild name of the two, so missing it would
  // miss the likelier case.
  for (const name of ['Moderators', 'The Admins', 'Guild of Moderators', 'Owners']) {
    assert.equal(await isReserved(name), true, `"${name}" impersonates as much as its singular`)
  }
  // Only a trailing s off the WHOLE term, so an ordinary word whose stem merely
  // contains one does not fire.
  for (const name of ['Nomads', 'Playerless', 'Gods']) {
    assert.equal(await isReserved(name), false, `"${name}" is not a plural of a reserved term`)
  }
})

test('an acronym spelled with punctuation is caught', async () => {
  // "G.M." normalises to two single-letter words, neither of which is the term.
  assert.equal(await isReserved('G.M.'), true)
  assert.equal(await isReserved('G M Council'), true)
  // …but joining single letters must not condense whole names, which would let a
  // single-word term match inside an ordinary word again.
  assert.equal(await isReserved('Badminton'), false)
})