// ── The slash commands (phase 16) ─────────────────────────────────────────
//
// The handlers against stubbed models. What matters most is D127: **an answer
// is public only when everything in it is public.** Every refusal is private,
// and a permitted answer narrower than `public` goes to the caller alone — the
// case core cannot catch, because an answer without the flag is posted to the
// channel.

const test = require('node:test')
const assert = require('node:assert')

const { fakeCtx, fakeApi } = require('./_fakes')

// Accounts as `core.users.getById` answers them. The role on the ACTOR is never
// trusted — the row is re-read — so a test gives the actor one role and the row
// another to prove it.
const USERS = {
  1: { id: 1, role: 'user', status: 'active' },
  2: { id: 2, role: 'moderator', status: 'active' },
  3: { id: 3, role: 'moderator', status: 'banned' },
}

function withCore() {
  const ctx = fakeCtx({ users: { getById: async (id) => USERS[id] || null } })
  require('../core')._reset()
  require('../core').init(ctx)
  return ctx
}

const actor = (userId, role = 'user') => ({
  platform: 'discord',
  platformUserId: `d${userId || 0}`,
  guildId: 'g1',
  userId: userId || null,
  role: userId ? role : null,
  isLinked: Boolean(userId),
  isStaff: role === 'admin' || role === 'moderator',
})
const STRANGER = actor(null)
const PLAYER = actor(1)
const MOD = actor(2, 'moderator')

const server = (over = {}) => ({
  id: 'main',
  name: 'Main',
  online: true,
  players: 3,
  maxPlayers: 100,
  worldSize: 4000,
  seed: 1234,
  wipeId: 'w-2026-09',
  wipedAt: '2026-09-03T18:00:00Z',
  lastSeenAt: '2026-09-25T11:59:00Z',
  stale: false,
  nextWipe: { at: '2026-10-01T18:00:00.000Z', source: 'forced' },
  ...over,
})

/** Swap model functions for one test, and put them back whatever happens. */
async function stubbed(stubs, body) {
  const saved = []
  for (const [mod, name, fn] of stubs) {
    saved.push([mod, name, mod[name]])
    mod[name] = fn
  }
  try {
    return await body()
  } finally {
    for (const [mod, name, fn] of saved) mod[name] = fn
  }
}

function models() {
  return {
    servers: require('../model/servers/servers.model'),
    events: require('../model/events/events.model'),
    visibility: require('../model/visibility/visibility.model'),
    clans: require('../model/clans/clans.model'),
    visibilityDb: require('../model/visibility/visibility.db'),
  }
}

const command = (name) => require('../commands').find((cmd) => cmd.name === name)

/** Everything an answer would put in front of a reader, as one string. */
const said = (env) => JSON.stringify([env.title, env.text, env.fields, env.notice])

// ── Registration ──────────────────────────────────────────────────────────

test('the entry point registers the five commands as one batch', () => {
  withCore()
  const api = fakeApi()
  require('../index')(fakeCtx(), api)
  assert.deepStrictEqual(api.record.slashCommands.map((cmd) => cmd.name), ['status', 'wipe', 'top', 'online', 'clan'])
})

test('every definition is one core will accept, and one Discord will', () => {
  // Core's `checkSlashCommandShape` rules, restated: a definition it refuses
  // fails the module at register(), and one Discord refuses takes every command
  // in the batch down with it, the bot's own included.
  const BUILT_INS = ['announce', 'autorole', 'ban', 'filter', 'filterallow', 'invite', 'kick', 'modlog', 'mute',
    'news', 'ping', 'role', 'rolemenu', 'roles', 'schedule', 'warn', 'warnings', 'wiki']
  for (const cmd of require('../commands')) {
    assert.match(cmd.name, /^[a-z0-9_-]{1,32}$/)
    assert.ok(!BUILT_INS.includes(cmd.name), `${cmd.name} collides with a bot built-in`)
    assert.ok(cmd.description.length >= 1 && cmd.description.length <= 100, `${cmd.name}: description length`)
    assert.strictEqual(cmd.access, 'everyone')
    assert.strictEqual(typeof cmd.handler, 'function')
    let optionalSeen = false
    for (const o of cmd.options) {
      assert.match(o.name, /^[a-z0-9_-]{1,32}$/)
      assert.ok(['string', 'integer', 'boolean', 'user'].includes(o.type))
      assert.ok(o.description.length >= 1 && o.description.length <= 100, `${cmd.name}.${o.name}: description length`)
      if (o.choices) assert.ok(['string', 'integer'].includes(o.type))
      if (!o.required) optionalSeen = true
      else assert.ok(!optionalSeen, `${cmd.name}: a required option after an optional one`)
    }
  }
})

// ── Picking a server ──────────────────────────────────────────────────────

test('a server is named by id, then name, then a unique prefix — never guessed', () => {
  withCore()
  const { pickServer } = require('../commands/common')
  const list = [server(), server({ id: 'eu-2x', name: 'EU 2x' }), server({ id: 'eu-5x', name: 'EU 5x' })]

  assert.strictEqual(pickServer(list, 'MAIN').server.id, 'main')
  assert.strictEqual(pickServer(list, 'eu 2x').server.id, 'eu-2x')
  assert.strictEqual(pickServer(list, 'eu-5').server.id, 'eu-5x')
  assert.strictEqual(pickServer(list, 'eu').ambiguous.length, 2)
  assert.strictEqual(pickServer(list, 'us').missing, 'us')
  assert.strictEqual(pickServer(list, undefined).all.length, 3)
  assert.strictEqual(pickServer([server()], undefined).server.id, 'main', 'a fleet of one is that server')
  assert.ok(pickServer([], 'main').none)
})

// ── Every refusal is private ──────────────────────────────────────────────

test('every refusal is ephemeral: unknown, ambiguous, no servers, /top on a fleet', async () => {
  withCore()
  const { servers } = models()
  const two = [server(), server({ id: 'main-2', name: 'Main 2' })]

  await stubbed([[servers, 'listPublic', async () => two]], async () => {
    for (const [name, options] of [
      ['status', { server: 'nope' }],
      ['wipe', { server: 'mai' }],
      ['online', { server: 'nope' }],
      ['top', {}],
      ['top', { server: 'm' }],
      ['clan', { name: '' }],
    ]) {
      // eslint-disable-next-line no-await-in-loop
      const env = await command(name).handler({ command: name, options, actor: STRANGER })
      assert.strictEqual(env.ephemeral, true, `/${name} ${JSON.stringify(options)} refused in public: ${env.text}`)
    }
  })

  await stubbed([[servers, 'listPublic', async () => []]], async () => {
    const env = await command('status').handler({ options: {}, actor: STRANGER })
    assert.strictEqual(env.ephemeral, true)
    assert.match(env.text, /No Rust servers/)
  })
})

// ── /status and /wipe ─────────────────────────────────────────────────────

test('/status answers in public, with the next wipe, and says when an offline server was last seen', async () => {
  withCore()
  const { servers } = models()
  await stubbed([[servers, 'listPublic', async () => [server(), server({ id: 'b', name: 'B', online: false, players: 0 })]]], async () => {
    const one = await command('status').handler({ options: { server: 'main' }, actor: STRANGER })
    assert.ok(!one.ephemeral)
    assert.strictEqual(one.url, 'http://localhost:5173/rust/servers/main')
    assert.match(said(one), /3\/100/)
    assert.match(said(one), /Next wipe.*Thu 1 Oct, 18:00 UTC.*monthly forced wipe/)

    const down = await command('status').handler({ options: { server: 'b' }, actor: STRANGER })
    assert.match(said(down), /Offline/)
    assert.match(said(down), /Last seen/)

    const fleet = await command('status').handler({ options: {}, actor: STRANGER })
    assert.ok(!fleet.ephemeral)
    assert.strictEqual(fleet.fields.length, 2)
  })
})

test('/wipe says "no schedule set" rather than inventing a forecast', async () => {
  withCore()
  const { servers } = models()
  await stubbed([[servers, 'listPublic', async () => [server({ nextWipe: null })]]], async () => {
    const env = await command('wipe').handler({ options: {}, actor: STRANGER })
    assert.ok(!env.ephemeral)
    assert.match(env.text, /Next: no schedule set/)
    assert.match(env.text, /Last: Thu 3 Sept?, 18:00 UTC/)
  })
  await stubbed([[servers, 'listPublic', async () => [server({ nextWipe: { at: '2026-10-03T17:00:00.000Z', source: 'once' } })]]], async () => {
    const env = await command('wipe').handler({ options: {}, actor: STRANGER })
    assert.match(env.text, /rescheduled by the operator/)
  })
})

// ── /top ──────────────────────────────────────────────────────────────────

test('/top reads the current wipe, never asks for presence, and prints no Steam id', async () => {
  withCore()
  const { servers, events } = models()
  const asked = []
  const rows = [{ steamId: '76561198000000001', name: 'Alice', kills: 9, deaths: 1, npcKills: 0, playtimeSec: 7260, lastSeen: 'x' }]
  await stubbed(
    [
      [servers, 'listPublic', async () => [server()]],
      [events, 'leaderboard', async (q) => { asked.push(q); return rows }],
    ],
    async () => {
      const env = await command('top').handler({ options: {}, actor: MOD })
      assert.ok(!env.ephemeral, 'the leaderboard names are public at every setting')
      assert.deepStrictEqual(asked[0], { serverId: 'main', wipeId: 'w-2026-09', sort: 'kills', limit: 10, presence: false })
      assert.match(env.text, /1\. Alice — 9/)
      assert.ok(!said(env).includes('76561198000000001'))

      const all = await command('top').handler({ options: { stat: 'playtime', alltime: true }, actor: STRANGER })
      assert.strictEqual(asked[1].wipeId, null)
      assert.strictEqual(asked[1].sort, 'playtime')
      assert.match(all.text, /2h 1m/)
      assert.match(all.title, /all time/)
    },
  )
})

// ── /online — D127 ────────────────────────────────────────────────────────

async function online(audience, who, over = {}) {
  const { servers, events, visibility } = models()
  return stubbed(
    [
      [servers, 'listPublic', async () => [server(over)]],
      [visibility, 'presenceFor', async () => audience],
      [events, 'online', async () => [{ name: 'Alice', sleeping: false }, { name: 'Bob', sleeping: true }]],
    ],
    () => command('online').handler({ options: {}, actor: who }),
  )
}

test('/online below the audience: the count, in public, and no names', async () => {
  withCore()
  const env = await online('staff', STRANGER)
  assert.ok(!env.ephemeral)
  assert.match(env.title, /3 online/)
  assert.ok(!said(env).includes('Alice'))
  // Staff is not something linking earns, so there is no nudge to link.
  assert.ok(!env.notice)
})

test('/online inside a narrower audience: the names, to the caller ALONE', async () => {
  withCore()
  const env = await online('staff', MOD)
  assert.strictEqual(env.ephemeral, true, 'a moderator’s roll call was posted to the channel')
  assert.match(env.text, /Alice/)
  assert.match(env.text, /Bob \(sleeping\)/)

  const signedIn = await online('signed_in', PLAYER)
  assert.strictEqual(signedIn.ephemeral, true)
})

test('/online with a public audience posts the names in the open', async () => {
  withCore()
  const env = await online('public', STRANGER)
  assert.ok(!env.ephemeral)
  assert.match(env.text, /Alice/)
})

test('/online nudges an unlinked caller to link only when linking would reach the names', async () => {
  withCore()
  const env = await online('signed_in', STRANGER)
  assert.ok(!env.ephemeral)
  assert.match(env.notice, /Link your Discord account/)
})

test('/online judges the ACCOUNT, not the actor: a banned moderator is nobody', async () => {
  withCore()
  const env = await online('staff', actor(3, 'moderator'))
  assert.ok(!said(env).includes('Alice'))
})

test('/online for an offline server names nobody, whatever the audience', async () => {
  withCore()
  const env = await online('public', MOD, { online: false, players: 0 })
  assert.match(env.text, /offline/)
  assert.ok(!said(env).includes('Alice'))
})

// ── /clan — D127 with D48 ─────────────────────────────────────────────────

const CLAN = { externalId: 'main:7:1', name: 'Wolves', color: '#aa3300', score: 50, memberCount: 2, maxMembers: 8 }

async function clan(rosterAudience, who, options = { name: 'wolves' }, board = { supported: true, fresh: true }) {
  const { servers, clans, visibilityDb, visibility } = models()
  return stubbed(
    [
      [servers, 'listPublic', async () => [server()]],
      [clans, 'listForServer', async () => ({ clans: [CLAN, { ...CLAN, externalId: 'main:8:1', name: 'Wolverines' }], board })],
      [visibilityDb, 'getSetting', async (key) => (key === visibility.CLAN_ROSTER_KEY ? rosterAudience : null)],
      [require('../model/clans/clans.db'), 'findClan', async () => ({ ...CLAN, serverId: 'main', serverName: 'Main', createdMs: 1 })],
      [require('../model/clans/clans.db'), 'userIsMember', async (_ext, userId) => userId === 1],
      [require('../model/clans/clans.db'), 'listMembers', async () => [
        { name: 'Alice', rank: 1, online: 1 },
        { name: 'Bob', rank: 2, online: 0 },
      ]],
    ],
    () => command('clan').handler({ options, actor: who }),
  )
}

test('/clan outside the roster audience: the public facts, in public, no names', async () => {
  withCore()
  const env = await clan('members', STRANGER)
  assert.ok(!env.ephemeral)
  assert.strictEqual(env.title, 'Wolves')
  assert.match(said(env), /50/)
  assert.ok(!said(env).includes('Alice'))
})

test('/clan inside a narrower roster audience: the roster, to the caller ALONE', async () => {
  withCore()
  const member = await clan('members', PLAYER)
  assert.strictEqual(member.ephemeral, true, 'a clan roster was posted to the channel')
  assert.match(said(member), /Alice \(leader, online\)/)

  const mod = await clan('members', MOD)
  assert.strictEqual(mod.ephemeral, true)
})

test('/clan with a public roster audience posts the roster in the open', async () => {
  withCore()
  const env = await clan('public', STRANGER)
  assert.ok(!env.ephemeral)
  assert.match(said(env), /Alice/)
})

test('/clan: an exact name wins over a prefix, and a shared prefix is ambiguous and private', async () => {
  withCore()
  assert.strictEqual((await clan('members', STRANGER, { name: 'WOLVES' })).title, 'Wolves')
  const env = await clan('members', STRANGER, { name: 'wol' })
  assert.strictEqual(env.ephemeral, true)
  assert.match(env.text, /Wolves, Wolverines/)
})

test('/clan does not say "no such clan" from a board it cannot trust', async () => {
  withCore()
  const env = await clan('members', STRANGER, { name: 'bears' }, { supported: true, fresh: false })
  assert.strictEqual(env.ephemeral, true)
  assert.match(env.text, /not available, so it may be there/)

  const sure = await clan('members', STRANGER, { name: 'bears' })
  assert.match(sure.text, /^No clan called “bears”\.$/)
})

// ── Words ─────────────────────────────────────────────────────────────────

test('times are written in UTC with the distance beside them', () => {
  withCore()
  const { when, relative } = require('../commands/common')
  const now = Date.parse('2026-09-25T12:00:00Z')
  assert.strictEqual(when('2026-10-01T18:00:00Z', now), 'Thu 1 Oct, 18:00 UTC (in 6 days)')
  assert.strictEqual(relative(now - 3 * 3_600_000, now), '3 hours ago')
  assert.strictEqual(relative(now + 90_000, now), 'in 2 minutes')
  assert.strictEqual(when(null, now), null)
})