// ── The in-app channel (ENGAGEMENT.md Phase 7) ─────────────────────────────
//
// The phase's five acceptance criteria, plus the things building it showed were
// worth pinning:
//
//   • one event delivered to `inapp` produces exactly one row
//   • a duplicate `dedupeKey` is a no-op
//   • mark-read is idempotent
//   • a user cannot read another user's row — asserted AT THE ROUTE, which is
//     what the acceptance line asks for, not only in the model
//   • `url` is relative-only, by the same character class `pageUrlTemplate` uses
//
//   • the block→column role mapping, which is the whole of how a template with a
//     subject and a document becomes a row with three fields
//   • `ctx.inbox.push` honours a preference where one exists and writes where
//     none does
//   • `liveChannels` puts `inapp` before `push`, which is what makes the tickle's
//     deep-link ref resolve on the first pass
//
// Point the DB at a closed port before requiring anything: the registries reach
// utils/discordAnnounce, which builds 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 channels = require('../src/engagement/channels')
const engine = require('../src/engagement/engine')
const inappChannel = require('../src/engagement/inappChannel')
const pushChannel = require('../src/engagement/pushChannel')
const templates = require('../src/engagement/templates')
const templateSeeds = require('../src/engagement/templateSeeds')
const templatesDb = require('../src/model/engagement/engagementTemplates.db')
const settings = require('../src/model/settings/settings.model')
const inbox = require('../src/model/userNotifications/userNotifications.db')
const recipients = require('../src/model/engagement/engagementRecipients.db')
const rulesDb = require('../src/model/engagement/engagementRules.db')
const pushDispatch = require('../src/utils/pushDispatch')
const notifCtrl = require('../src/router/v1/auth/notifications.controller')
const db = require('../src/utils/db')

require('../src/engagement')
registries.registerCore()

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

const saved = new Map()
function patch(mod, name, fn) {
  if (!saved.has(mod)) saved.set(mod, new Map())
  if (!saved.get(mod).has(name)) saved.get(mod).set(name, mod[name])
  mod[name] = fn
}
function restore() {
  for (const [mod, names] of saved) for (const [name, fn] of names) mod[name] = fn
  saved.clear()
}

const TRIGGER = 'team.forum.post'

let world

beforeEach(() => {
  world = { rows: [], tickles: [], storedModes: new Map() }

  // A stand-in for `user_notifications`, keyed the way the UNIQUE index is.
  patch(inbox, 'insert', async (item) => {
    const clash =
      item.dedupeKey &&
      world.rows.some((r) => r.userId === item.userId && r.dedupeKey === item.dedupeKey)
    if (clash) return { inserted: false, id: null }
    const row = { id: world.rows.length + 1, ...item }
    world.rows.push(row)
    return { inserted: true, id: row.id }
  })
  patch(inbox, 'findByDedupe', async (userId, key) => {
    if (!key) return null
    const row = world.rows.find((r) => r.userId === Number(userId) && r.dedupeKey === key)
    return row ? { id: row.id, title: row.title } : null
  })
  patch(recipients, 'filterActive', async (ids) => ids)
  patch(recipients, 'storedModes', async () => world.storedModes)
  patch(pushDispatch, 'publishToUsers', async (streamId, opts) => {
    world.tickles.push({ streamId, ...opts })
  })
  patch(rulesDb, 'getById', async () => ({
    id: 1,
    trigger_id: TRIGGER,
    template_keys: { inapp: 'inapp.event' },
  }))
  // **Stubbed at the MODULE BOUNDARY, not on `templates` itself**, and the
  // distinction cost four minutes a run to find: `renderInappByKey` calls its
  // own file-local `ambient()` and `resolveTemplate()`, so patching
  // `templates.ambient` replaces an export nothing in that path reads, every
  // call reaches the dead port, and each one waits out the driver's 30-second
  // connect timeout while still passing. These two are real cross-module calls,
  // so replacing them is what actually keeps the render off the database.
  //
  // A null row is also the path a fresh deployment takes: `resolveTemplate`
  // falls through to the shipped seed.
  patch(templatesDb, 'getByKey', async () => null)
  patch(settings, 'getInstanceName', async () => 'Test Shard')
  patch(settings, 'getShellBrand', async () => ({ logo: null, theme: null }))
})
afterEach(restore)

const outboxRow = (over = {}) => ({
  id: 1,
  rule_id: 1,
  trigger_id: TRIGGER,
  user_id: 11,
  channel: 'inapp',
  subject_key: 'The Silver Hand',
  scope_key: 'team:1',
  dedupe_key: 'post:7',
  payload: { teamName: 'The Silver Hand', authorName: 'Ten', threadTitle: 'Raid', postUrl: '/g/1?thread=7' },
  ...over,
})

// ── The registration ───────────────────────────────────────────────────────

// The Phase 7 decision `coreChannels.js` deferred in as many words. Opt-OUT for
// in-app alone: it wakes no device and leaves no building.
test('inapp is the one channel that defaults to instant', () => {
  assert.equal(channels.defaultMode('inapp'), 'instant')
  assert.equal(channels.defaultMode('push'), 'off')
  assert.equal(channels.defaultMode('email'), 'off')
})

test('inapp and push both have a deliver now, and push still carries no content', () => {
  assert.equal(typeof channels.get('inapp').deliver, 'function')
  assert.equal(typeof channels.get('push').deliver, 'function')
  assert.equal(channels.get('push').carriesContent, false)
})

// ── deliver ────────────────────────────────────────────────────────────────

test('one event delivered to inapp produces exactly one row', async () => {
  const result = await inappChannel.deliver(outboxRow())
  assert.equal(result.ok, true)
  assert.equal(world.rows.length, 1)
  assert.equal(world.rows[0].userId, 11)
  assert.equal(world.rows[0].triggerId, TRIGGER)
})

// The acceptance line calls it a no-op; from the recipient's side it is a
// delivery, so it reports ok with the reason in the detail rather than putting a
// red row in the send log for the mechanism working.
test('a duplicate dedupeKey is a no-op that still reports success', async () => {
  await inappChannel.deliver(outboxRow())
  const again = await inappChannel.deliver(outboxRow({ id: 2 }))
  assert.equal(again.ok, true)
  assert.match(again.detail, /duplicate/i)
  assert.equal(world.rows.length, 1)
})

test('a row with no dedupe key is never deduped', async () => {
  await inappChannel.deliver(outboxRow({ dedupe_key: null }))
  await inappChannel.deliver(outboxRow({ id: 2, dedupe_key: null }))
  assert.equal(world.rows.length, 2)
})

test('a user who can no longer be reached is a terminal failure, not a retry', async () => {
  patch(recipients, 'filterActive', async () => [])
  const result = await inappChannel.deliver(outboxRow())
  assert.equal(result.ok, false)
  assert.equal(result.retry, undefined)
  assert.equal(world.rows.length, 0)
})

// A throw would be read by the worker as a transient failure and retried five
// times — one unrenderable template becoming five identical send-log rows.
test('deliver never throws — a render failure is classified, not propagated', async () => {
  patch(templates, 'renderInappByKey', async () => { throw new Error('blocks are broken') })
  const result = await inappChannel.deliver(outboxRow())
  assert.equal(result.ok, false)
  assert.match(result.detail, /blocks are broken/)
})

test('a template that names nothing shipped is terminal and says which key', async () => {
  patch(rulesDb, 'getById', async () => ({ id: 1, template_keys: { inapp: 'nope.missing' } }))
  const result = await inappChannel.deliver(outboxRow())
  assert.equal(result.ok, false)
  assert.match(result.detail, /nope\.missing/)
})

// ── The block → column role mapping ────────────────────────────────────────

test('the heading becomes the title, the button becomes the url, the rest becomes the body', async () => {
  const rendered = await templates.renderInappByKey('inapp.event', {
    title: 'Your house is close to collapsing',
    intro: 'The Silver Anvil has entered its final decay stage.',
    actionUrl: '/player/uo/houses',
  })
  assert.equal(rendered.title, 'Your house is close to collapsing')
  assert.equal(rendered.url, '/player/uo/houses')
  assert.match(rendered.body, /final decay stage/)
  // The title and the action are COLUMNS; repeating them in the body would show
  // the same words twice on one card.
  assert.doesNotMatch(rendered.body, /close to collapsing/)
  assert.doesNotMatch(rendered.body, /player\/uo\/houses/)
})

// §4.6.1 property 1, for this channel: a trigger with no bespoke template still
// renders, because `projection.project` supplies the structural names.
test('a trigger that authored nothing still gets a title, from its declaration', async () => {
  const rendered = await inappChannel.renderItem(TRIGGER, { teamName: 'The Silver Hand' }, 'inapp.event')
  assert.ok(rendered.title.length > 0)
  assert.notEqual(rendered.title, 'inapp.event')
})

// The seed Phase 5a wrote named `body` and `url` — names nothing supplies, so
// every rendering of it would have produced a title and nothing else.
test('the shipped inapp seed names only variables the projection actually supplies', () => {
  const seed = templateSeeds.seedByKey('inapp.event')
  assert.equal(seed.seedVersion, 2)
  const names = seed.variables.map((v) => v.name).sort()
  assert.deepEqual(names, ['actionUrl', 'intro', 'title'])
})

// ── url: relative only ─────────────────────────────────────────────────────

test('url is relative-only, and a protocol-relative one is dropped rather than stored', () => {
  const base = 'https://shard.test'
  assert.equal(templates.relativeUrl('/guilds/4', base), '/guilds/4')
  assert.equal(templates.relativeUrl('https://shard.test/guilds/4', base), '/guilds/4')
  assert.equal(templates.relativeUrl('//evil.test/x', base), null)
  assert.equal(templates.relativeUrl('https://evil.test/x', base), null)
  assert.equal(templates.relativeUrl('javascript:alert(1)', base), null)
  assert.equal(templates.relativeUrl('', base), null)
})

// ── ctx.inbox.push ─────────────────────────────────────────────────────────

test('ctx.inbox.push writes an item for a trigger nothing has registered', async () => {
  const res = await inappChannel.pushDirect('uo', 11, {
    triggerId: 'uo.unregistered.thing',
    title: 'Something happened',
    body: 'A thing occurred.',
    url: '/player/uo/houses',
  })
  assert.equal(res.written, true)
  assert.equal(world.rows[0].url, '/player/uo/houses')
})

// The decision: a toggle somebody switched off must not be walkable around by
// the module that owns the trigger behind it.
test('ctx.inbox.push honours the user’s preference when the trigger IS registered', async () => {
  world.storedModes = new Map([[11, 'off']])
  const res = await inappChannel.pushDirect('uo', 11, { triggerId: TRIGGER, title: 'Hi' })
  assert.equal(res.written, false)
  assert.equal(world.rows.length, 0)
})

test('ctx.inbox.push writes for a registered trigger the user has left at the default', async () => {
  world.storedModes = new Map()
  const res = await inappChannel.pushDirect('uo', 11, { triggerId: TRIGGER, title: 'Hi' })
  assert.equal(res.written, true)
})

test('ctx.inbox.push drops an off-site url rather than storing it', async () => {
  await inappChannel.pushDirect('uo', 11, {
    triggerId: 'x.y',
    title: 'Hi',
    url: 'https://evil.test/steal',
  })
  assert.equal(world.rows[0].url, null)
})

test('ctx.inbox.push refuses an item with no title, and never throws', async () => {
  const res = await inappChannel.pushDirect('uo', 11, { triggerId: 'x.y' })
  assert.equal(res.written, false)
  patch(inbox, 'insert', async () => { throw new Error('table is gone') })
  const boom = await inappChannel.pushDirect('uo', 11, { triggerId: 'x.y', title: 'Hi' })
  assert.equal(boom.written, false)
})

// ── push: the tickle, its ref, and what must never ride on it ──────────────

test('the push tickle carries the stream and a ref, and no content whatsoever', async () => {
  await inappChannel.deliver(outboxRow())
  const result = await pushChannel.deliver(outboxRow({ id: 2, channel: 'push' }))
  assert.equal(result.ok, true)
  const tickle = world.tickles[0]
  assert.equal(tickle.streamId, TRIGGER)
  assert.equal(tickle.ref, 'notification:1')
  assert.deepEqual(Object.keys(tickle).sort(), ['ref', 'streamId', 'userIds'])
  assert.deepEqual(tickle.userIds, [11])
})

test('a push row with no inbox row behind it still publishes, with a null ref', async () => {
  const result = await pushChannel.deliver(outboxRow({ channel: 'push', dedupe_key: null }))
  assert.equal(result.ok, true)
  assert.equal(world.tickles[0].ref, null)
})

// The ordering is what makes the ref resolve on the first pass: the outbox is
// swept `ORDER BY due_at, id`, so the in-app row has to be enqueued first.
test('liveChannels enqueues inapp before push, whatever order the rule names them in', () => {
  assert.deepEqual(engine.liveChannels({ channels: ['push', 'inapp'] }), ['inapp', 'push'])
  assert.deepEqual(engine.liveChannels({ channels: ['email', 'push'] }), ['email', 'push'])
  assert.deepEqual(engine.liveChannels({ channels: ['push', 'nope'] }), ['push'])
})

// ── The routes: ownership, asserted where the acceptance line asks for it ──

function res() {
  const out = { code: 200, body: null }
  return {
    out,
    status(c) { out.code = c; return this },
    json(b) { out.body = b; return this },
  }
}

test('a user cannot mark another user’s notification read — 404 at the route', async () => {
  // The model is NOT stubbed to "found": it is the real ownership predicate the
  // route depends on, so the stub answers the way the SQL would.
  patch(inbox, 'markRead', async (userId, id) => Number(userId) === 11 && Number(id) === 5)
  patch(inbox, 'unreadCount', async () => 0)

  const mine = res()
  await notifCtrl.markRead({ user: { id: 11 }, params: { id: 5 } }, mine)
  assert.equal(mine.out.code, 200)

  const theirs = res()
  await notifCtrl.markRead({ user: { id: 12 }, params: { id: 5 } }, theirs)
  assert.equal(theirs.out.code, 404)
  // The same answer whether the row is nobody's or somebody else's: telling them
  // apart would make this a way to ask whether an id exists.
  const missing = res()
  await notifCtrl.markRead({ user: { id: 11 }, params: { id: 999 } }, missing)
  assert.equal(missing.out.code, 404)
})

test('mark-read is idempotent', async () => {
  let stamps = 0
  patch(inbox, 'markRead', async () => { stamps += 1; return true })
  patch(inbox, 'unreadCount', async () => 0)
  await notifCtrl.markRead({ user: { id: 11 }, params: { id: 5 } }, res())
  await notifCtrl.markRead({ user: { id: 11 }, params: { id: 5 } }, res())
  assert.equal(stamps, 2) // the route is happy to be called twice…
  // …and the statement behind it only stamps an unread row, which is the half
  // that makes the second call a no-op. Pinned in the SQL test.
})

// There is no route parameter and no query string that names a user, so the
// listing cannot be pointed at another account even by a caller who tries.
test('the inbox list reads the caller and nothing else', async () => {
  let askedFor = null
  patch(inbox, 'list', async (userId, opts) => {
    askedFor = { userId, opts }
    return { items: [], hasMore: false }
  })
  patch(inbox, 'unreadCount', async () => 2)
  const r = res()
  await notifCtrl.getInbox(
    { user: { id: 11 }, query: { limit: '10', before: '99', unread: 'true', userId: '12' } },
    r,
  )
  assert.equal(askedFor.userId, 11)
  assert.equal(askedFor.opts.unreadOnly, true)
  assert.equal(r.out.body.unread, 2)
})