// ── The event action registry (EVENTS.md §F, Phase 1) ──────────────────────
//
// Phase 1's acceptance criteria for the registry half, one test apiece:
//
//   • core's three actions register on every boot and appear in the catalog
//   • the catalog never carries a callable — no `perform`, `revert` or `cost`
//   • a module registering an un-namespaced action fails, with the holder named
//   • the closed sets are closed: an invented risk or reversibility is refused
//   • `reversible: 'ledger'` without a `revert()` is refused AT REGISTRATION,
//     not discovered at teardown when something has already been created
//   • an action id and a trigger id are DIFFERENT namespaces, so one id may
//     legitimately be both — the property the audience registry established and
//     this one inherits
//
// Point the DB at a closed port BEFORE requiring anything: registries.js reaches
// utils/discordAnnounce, which reaches the pool at require time.
process.env.DB_HOST = '127.0.0.1'
process.env.DB_PORT = '59999'

const { test, beforeEach, afterEach, after } = require('node:test')
const assert = require('node:assert/strict')

const registries = require('../src/modules/registries')
const coreEventActions = require('../src/config/coreEventActions')
const db = require('../src/utils/db')

after(() => db.close())

beforeEach(() => registries._reset())
afterEach(() => registries._reset())

const ok = (over = {}) => ({
  id: 'demo.thing.do',
  label: 'Do the thing',
  risk: 'change',
  reversible: 'none',
  perform: async () => ({ ok: true }),
  ...over,
})

const register = (owner, entries) => {
  const api = registries.stage(owner)
  api.registerEventActions(entries)
  registries.apply(api.staged)
}

test('core registers its three actions on every boot', () => {
  registries.registerCore()
  const ids = registries.allEventActions().map((a) => a.id)
  assert.deepEqual(ids, ['core.announce', 'core.wait', 'core.cue'])
  assert.equal(ids.length, coreEventActions.ACTIONS.length)
})

test('the catalog carries no callable', () => {
  registries.registerCore()
  for (const action of registries.allEventActions()) {
    assert.equal(action.perform, undefined, `${action.id} leaked perform`)
    assert.equal(action.revert, undefined, `${action.id} leaked revert`)
    assert.equal(action.cost, undefined, `${action.id} leaked cost`)
  }
  // …and the runner's own lookup still has it, which is the half that makes the
  // stripping a boundary rather than a deletion.
  assert.equal(typeof registries.eventAction('core.wait').perform, 'function')
})

test('core placeholders refuse rather than claiming success', async () => {
  // Phase 1 declares; Phase 2 dispatches. The placeholder's answer matters
  // because `ok: true` on an action that did nothing is a recorded world change
  // that did not occur — the one wrong answer a stub can give.
  registries.registerCore()
  for (const id of ['core.announce', 'core.wait', 'core.cue']) {
    const answer = await registries.eventAction(id).perform({})
    assert.equal(answer.ok, false)
    assert.equal(answer.retry, false)
    assert.match(answer.error, new RegExp(id.replace('.', '\\.')))
  }
})

test('an action must be namespaced to its owner, and the holder is named', () => {
  assert.throws(() => register('demo', [ok({ id: 'other.thing.do' })]), /not namespaced "demo\."/)

  register('demo', [ok()])
  assert.throws(
    () => register('rival', [ok({ id: 'demo.thing.do' })]),
    /already registered by "demo"/,
  )
})

test('the same id twice in one batch is refused', () => {
  assert.throws(() => register('demo', [ok(), ok()]), /registered twice/)
})

test('risk and reversibility are closed sets with no default', () => {
  assert.throws(() => register('demo', [ok({ risk: undefined })]), /needs a risk class/)
  assert.throws(() => register('demo', [ok({ risk: 'world-write' })]), /needs a risk class/)
  assert.throws(
    () => register('demo', [ok({ reversible: undefined })]),
    /needs a reversible class/,
  )
  assert.throws(() => register('demo', [ok({ reversible: 'maybe' })]), /needs a reversible class/)
})

test("reversible: 'ledger' without revert() is refused at registration", () => {
  assert.throws(
    () => register('demo', [ok({ reversible: 'ledger' })]),
    /is reversible: 'ledger' but has no revert\(\)/,
  )
  // And the mirror: a revert() nothing will ever call is a promise core does not
  // keep, so it is refused just as loudly.
  assert.throws(
    () => register('demo', [ok({ reversible: 'none', revert: async () => ({ ok: true }) })]),
    /declares revert\(\) but is reversible: 'none'/,
  )
  register('demo', [ok({ reversible: 'ledger', revert: async () => ({ ok: true }) })])
  assert.equal(typeof registries.eventAction('demo.thing.do').revert, 'function')
})

test('perform() is required and cost must be a function', () => {
  assert.throws(() => register('demo', [ok({ perform: undefined })]), /has no perform\(\)/)
  assert.throws(() => register('demo', [ok({ cost: { 'demo.things': 1 } })]), /cost must be a function/)
})

test('every param needs a type and an example', () => {
  const withParams = (params) => ok({ params })
  assert.throws(() => register('demo', [withParams([{ name: 'x' }])]), /unsupported type/)
  assert.throws(
    () => register('demo', [withParams([{ name: 'x', type: 'int' }])]),
    /needs an example/,
  )
  assert.throws(
    () => register('demo', [withParams([{ name: '9bad', type: 'int', example: 1 }])]),
    /bad param name/,
  )
  assert.throws(
    () =>
      register('demo', [
        withParams([
          { name: 'x', type: 'int', example: 1 },
          { name: 'x', type: 'int', example: 2 },
        ]),
      ]),
    /declared twice/,
  )
  register('demo', [withParams([{ name: 'x', type: 'int', example: 12, source: 'demo.options.x' }])])
  const [param] = registries.eventAction('demo.thing.do').params
  assert.deepEqual(param, {
    name: 'x',
    type: 'int',
    required: false,
    example: 12,
    source: 'demo.options.x',
    description: '',
  })
})

test('budgetMs defaults, and is bounded', () => {
  register('demo', [ok()])
  assert.equal(registries.eventAction('demo.thing.do').budgetMs, registries.DEFAULT_BUDGET_MS)
  registries._reset()
  assert.throws(() => register('demo', [ok({ budgetMs: 0 })]), /budgetMs must be/)
  assert.throws(() => register('demo', [ok({ budgetMs: 3_600_001 })]), /budgetMs must be/)
})

test('actions and triggers are different namespaces, so one id may be both', () => {
  // The property §F states and the audience registry established first. A verb
  // called `demo.raid.start` and an event called `demo.raid.start` are two
  // unrelated declarations, and forbidding the pair would forbid the most
  // natural names a module will ever want.
  const api = registries.stage('demo')
  api.registerEventTriggers([
    { id: 'demo.raid.start', label: 'A raid started', ceiling: 'everyone' },
  ])
  api.registerEventActions([ok({ id: 'demo.raid.start', label: 'Start a raid' })])
  registries.apply(api.staged)

  assert.equal(registries.eventTrigger('demo.raid.start').label, 'A raid started')
  assert.equal(registries.eventAction('demo.raid.start').label, 'Start a raid')
})

test('a whole batch is refused or taken, never half', () => {
  assert.throws(
    () => register('demo', [ok(), ok({ id: 'demo.other.do', risk: 'nope' })]),
    /needs a risk class/,
  )
  // The shape check throws at the CALL, before anything is staged, so nothing
  // from the batch is visible.
  assert.equal(registries.eventAction('demo.thing.do'), null)
})

test('_reset() hands the process back', () => {
  registries.registerCore()
  assert.equal(registries.allEventActions().length, 3)
  registries._reset()
  assert.equal(registries.allEventActions().length, 0)
  assert.equal(registries.isEventAction('core.wait'), false)
})