// ── Asking a server how it is now, before saying no (W7, W11) ──────────────
//
// Each test is one way the feature could look right and be wrong:
//
//   a "no" from the stored status is asked again, and the fresh answer is the one acted on
//   a "yes" is never asked again: the plugin refuses at the run, as it always has
//   a "no" the sidecar cannot change is still a "no"
//   ten steps against one server in one dry run ask it once
//   a step refused for Backpacks just after a restart passes once the server says it is back

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

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

require('../core')._reset()
require('../core').init(fakeCtx({ db: { query: () => Promise.resolve([]), pool: {} } }))

const boot = require('../boot')
const live = require('../liveStatus')

const MAIN = { id: 'main', name: 'Main', baseUrl: 'http://main:1', token: 't' }

/** `boot.refreshOne` replaced by `onAsk`, counted. */
function stubAsk(t, onAsk = () => {}) {
  const saved = boot.refreshOne
  const asked = []
  live._reset()
  boot.refreshOne = async (server) => {
    asked.push(server.id)
    await onAsk(server)
  }
  t.after(() => {
    boot.refreshOne = saved
    live._reset()
  })
  return asked
}

test('a refusal from the stored status is asked again, and the fresh answer is the one acted on', async (t) => {
  let stored = { loaded: false }
  const asked = stubAsk(t, () => {
    stored = { loaded: true }
  })
  const answer = await live.confirmed(MAIN, async () => stored, (r) => !r.loaded)
  assert.deepStrictEqual(answer, { loaded: true })
  assert.deepStrictEqual(asked, ['main'])
})

test('a pass is never asked again', async (t) => {
  const asked = stubAsk(t)
  const answer = await live.confirmed(MAIN, async () => ({ loaded: true }), (r) => !r.loaded)
  assert.deepStrictEqual(answer, { loaded: true })
  assert.deepStrictEqual(asked, [])
})

test('a refusal the fresh answer agrees with is still a refusal, and a failed ask leaves the stored one', async (t) => {
  stubAsk(t)
  assert.strictEqual(await live.confirmed(MAIN, async () => 'Backpacks is not installed', Boolean), 'Backpacks is not installed')

  stubAsk(t, () => {
    throw new Error('boom')
  })
  assert.strictEqual(await live.refresh(MAIN), false)
  assert.strictEqual(await live.confirmed(MAIN, async () => 'still no', Boolean), 'still no')
})

test('many refusals against one server at once ask it once, and again only after a while', async (t) => {
  let release
  const gate = new Promise((resolve) => {
    release = resolve
  })
  const asked = stubAsk(t, () => gate)
  const all = Promise.all(Array.from({ length: 10 }, () => live.confirmed(MAIN, async () => 'no', Boolean)))
  release()
  await all
  assert.deepStrictEqual(asked, ['main'], 'one ask in flight serves every step')

  await live.confirmed(MAIN, async () => 'no', Boolean)
  assert.deepStrictEqual(asked, ['main'], `an ask within ${live.FRESH_MS} ms is as fresh as asking again`)

  await live.confirmed({ ...MAIN, id: 'pve' }, async () => 'no', Boolean)
  assert.deepStrictEqual(asked, ['main', 'pve'], 'another server is its own')
})

test('a step waits at most ASK_MS for the ask, and a late ask leaves the stored answer', async (t) => {
  t.mock.timers.enable({ apis: ['setTimeout'] })
  stubAsk(t, () => new Promise(() => {}))
  const answer = live.confirmed(MAIN, async () => 'not installed', Boolean)
  // Let the first read and the ask start before the clock moves.
  for (let i = 0; i < 5; i++) await Promise.resolve()
  t.mock.timers.tick(live.ASK_MS)
  assert.strictEqual(await answer, 'not installed')
})

test('a bigger backpack refused on a stale "not installed" passes once the server says Backpacks is back (W7)', async (t) => {
  const rewards = require('../eventRewards')
  const serversDb = require('../model/servers/servers.db')
  const backpacksDb = require('../model/backpacks/backpacks.db')
  const saved = { getServer: serversDb.getServer, reportFor: backpacksDb.reportFor }
  t.after(() => Object.assign(serversDb, { getServer: saved.getServer }) && Object.assign(backpacksDb, { reportFor: saved.reportFor }))

  serversDb.getServer = async (id) => (id === 'main' ? { id: 'main', name: 'Main', enabled: 1, sidecarBaseUrl: 'http://main:1' } : null)
  let report = null
  backpacksDb.reportFor = async () => ({ serverId: 'main', backpacks: report })
  const asked = stubAsk(t, () => {
    report = JSON.stringify({ loaded: true, sizes: [6, 48] })
  })
  const step = rewards.ACTIONS.find((a) => a.id === 'rust.backpack.size')
  const result = await step.perform({ runId: 7, stepId: 1, idempotencyKey: '7:1', params: { server: 'main', size: 48, recipients: 'linked' }, verify: true })
  assert.deepStrictEqual(asked, ['main'])
  assert.deepStrictEqual(result, { ok: true })
})