// Point the DB at a closed port before anything builds the pool — this file only
// exercises pure functions, but requiring the util pulls in nothing else.
process.env.DB_HOST = '127.0.0.1'
process.env.DB_PORT = '59999'

const { test } = require('node:test')
const assert = require('node:assert/strict')

// Phases 6-8 of docs/website/THEMING_AND_NAV.md: the server half of the nav
// overrides. The merge itself is the client's (client/src/lib/navOverrides.js,
// tested there); this module decides only what may be *stored*, and the two
// properties worth locking are the asymmetry — strict on write, forgiving on
// read — and the two things a stored row may never carry: a field that is not
// one of the four, and `hidden` on the nav editor's own row.
const { validateNavOverrides, resolveNavOverrides, NAV_KEYS } = require('../src/utils/navOverrides')

// ── validateNavOverrides — strict, and names what it rejected ──────────

test('null and undefined are valid — that is how every override is cleared', () => {
  assert.equal(validateNavOverrides(null).ok, true)
  assert.equal(validateNavOverrides(undefined).ok, true)
})

test('an empty object is valid — the caller deletes the row instead of storing it', () => {
  assert.equal(validateNavOverrides({}).ok, true)
})

test('a non-object is rejected under the key it was written to', () => {
  for (const bad of [4, 'x', true, [], [{ to: '/' }]]) {
    const check = validateNavOverrides(bad, 'nav_public')
    assert.equal(check.ok, false, `${JSON.stringify(bad)} should be rejected`)
    assert.match(check.message, /nav_public must be a JSON object/)
  }
})

test('a key that is not an app path is rejected and named', () => {
  for (const bad of [
    'site/news', // relative
    '//evil.example/x', // protocol-relative: looks like a path, leaves the origin
    'https://evil.example', // scheme
    '/site/ news', // whitespace
    '/site/"news"', // quotes
    '',
  ]) {
    const check = validateNavOverrides({ [bad]: { order: 1 } }, 'nav_public')
    assert.equal(check.ok, false, `'${bad}' should be rejected as a key`)
    assert.match(check.message, /must be an app path/)
  }
})

test('a valid app path is accepted as a key even when no nav declares it', () => {
  // Membership is the client's question: applyNavOverrides drops an unknown `to`
  // at merge time, so a route deleted in code needs no migration here.
  assert.equal(validateNavOverrides({ '/site/gone': { order: 3 } }).ok, true)
})

test('an entry that is not an object is rejected', () => {
  for (const bad of ['x', 4, null, []]) {
    const check = validateNavOverrides({ '/site/news': bad }, 'nav_public')
    assert.equal(check.ok, false, `${JSON.stringify(bad)} should be rejected as an entry`)
    assert.match(check.message, /must be an object/)
  }
})

test('an unknown field is rejected rather than silently ignored', () => {
  // Storing a value that will never apply is a bad admin experience, and a
  // field nobody validates is where a future `to`/`roles` would try to sneak in.
  for (const field of ['to', 'roles', 'feature', 'icon', 'end', 'href']) {
    const check = validateNavOverrides({ '/site/news': { [field]: 'x' } }, 'nav_public')
    assert.equal(check.ok, false, `'${field}' should be rejected`)
    assert.match(check.message, new RegExp(`Unknown nav field '${field}'`))
  }
})

test('each of the four fields is type-checked and named on failure', () => {
  const cases = [
    [{ label: 4 }, /label must be text/],
    [{ label: 'x'.repeat(65) }, /label must be text/],
    [{ group: 4 }, /group must be text/],
    [{ group: 'x'.repeat(65) }, /group must be text/],
    [{ order: '1' }, /order must be a number/],
    [{ order: Number.NaN }, /order must be a number/],
    [{ order: Number.POSITIVE_INFINITY }, /order must be a number/],
    [{ hidden: 'true' }, /hidden must be true or false/],
    [{ hidden: 1 }, /hidden must be true or false/],
  ]
  for (const [entry, pattern] of cases) {
    const check = validateNavOverrides({ '/site/news': entry }, 'nav_public')
    assert.equal(check.ok, false, `${JSON.stringify(entry)} should be rejected`)
    assert.match(check.message, pattern)
    assert.match(check.message, /\/site\/news/)
  }
})

test('all four fields together are accepted', () => {
  const check = validateNavOverrides({
    '/admin/houses': { label: 'Houses', order: 2, hidden: true, group: 'Moderation' },
  })
  assert.equal(check.ok, true)
})

test('an absurd number of entries is refused', () => {
  const many = {}
  for (let i = 0; i < 201; i += 1) many[`/site/p${i}`] = { order: i }
  const check = validateNavOverrides(many, 'nav_public')
  assert.equal(check.ok, false)
  assert.match(check.message, /at most 200 entries/)
})

// ── resolveNavOverrides — forgiving, and drops what would do nothing ───

test('unusable entries are dropped and their neighbours kept', () => {
  const out = resolveNavOverrides({
    '/site/news': { label: 'Announcements' },
    'not-a-path': { label: 'Ignored' },
    '/site/wiki': 'garbage',
    '/site/market': { hidden: true },
  })
  assert.deepEqual(out, {
    '/site/news': { label: 'Announcements' },
    '/site/market': { hidden: true },
  })
})

test('a label is trimmed, and a whitespace-only label falls back to the coded one', () => {
  assert.deepEqual(resolveNavOverrides({ '/x': { label: '  News  ' } }), { '/x': { label: 'News' } })
  assert.deepEqual(resolveNavOverrides({ '/x': { label: '   ' } }), {})
})

test('hidden: false is never stored — hiding is subtractive only', () => {
  // A stored `false` could read to a later consumer as "force visible", and
  // nothing in this layer may un-hide a role- or feature-gated item (§7).
  assert.deepEqual(resolveNavOverrides({ '/x': { hidden: false } }), {})
  assert.deepEqual(resolveNavOverrides({ '/x': { hidden: false, order: 2 } }), { '/x': { order: 2 } })
})

test('the nav editor cannot be hidden, even by a hand-written row', () => {
  // Hiding /admin/navigation would remove the only screen that can un-hide it.
  const out = resolveNavOverrides({ '/admin/navigation': { hidden: true, order: 9 } }, 'nav_admin')
  assert.deepEqual(out, { '/admin/navigation': { order: 9 } })
  // An entry that carried nothing else disappears entirely rather than storing
  // an empty object.
  assert.deepEqual(resolveNavOverrides({ '/admin/navigation': { hidden: true } }, 'nav_admin'), {})
})

test('the un-hideable rule is scoped to the admin nav', () => {
  // The same path in another row is meaningless, but it is also not special:
  // the rule protects the admin sidebar, which is the nav that renders it.
  assert.deepEqual(resolveNavOverrides({ '/admin/navigation': { hidden: true } }, 'nav_public'), {
    '/admin/navigation': { hidden: true },
  })
})

test('an entry left with no usable field is dropped, so `{}` is never stored', () => {
  assert.deepEqual(resolveNavOverrides({ '/x': {}, '/y': { label: 4 } }), {})
})

test('order survives as a number, including zero and negatives', () => {
  const out = resolveNavOverrides({ '/a': { order: 0 }, '/b': { order: -3 }, '/c': { order: 1.5 } })
  assert.deepEqual(out, { '/a': { order: 0 }, '/b': { order: -3 }, '/c': { order: 1.5 } })
})

test('a non-object resolves to {} rather than throwing', () => {
  for (const bad of [null, undefined, 'x', 4, []]) {
    assert.deepEqual(resolveNavOverrides(bad), {})
  }
})

test('NAV_KEYS names the three rows the controller validates', () => {
  assert.deepEqual(NAV_KEYS, ['nav_public', 'nav_admin', 'nav_player'])
})