// Member-raised abuse reports (docs/website/TEAMS.md §5.6).
//
// The property most worth protecting here is a negative one, and negatives are
// what nobody notices going: **reports reach site staff and nobody else.** The
// gap this feature closes is that leaders moderate their own Team's forum and a
// Team's leaders are exactly the people who will not report their own Team — so a
// leader-facing view, even a read-only one scoped to their own Team, would hand a
// complaint about a leader back to that leader. Org lead settled it on 2026-08-18:
// site administration only. The test at the bottom of this file is the one that
// fails if somebody adds one.

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

const reports = require('../src/model/reports/contentReports.model')
const reportsDb = require('../src/model/reports/contentReports.db')
const forumDb = require('../src/model/teams/teamForum.db')

const saved = []
function patch(mod, name, fn) {
  saved.push([mod, name, mod[name]])
  mod[name] = fn
}
afterEach(() => {
  while (saved.length) {
    const [mod, name, original] = saved.pop()
    mod[name] = original
  }
})

const team = { id: 1, name: 'Ossuary' }
const reporter = { id: 11, username: 'wanderer' }

// The world a report is filed into: one thread, one post in it, one upload, all
// in team 1.
function stubTargets({ teamId = 1 } = {}) {
  patch(forumDb, 'threadById', async (id) => (id === 5 ? { id: 5, team_id: teamId } : null))
  patch(forumDb, 'postById', async (id) => (id === 80 ? { id: 80, thread_id: 5 } : null))
  patch(forumDb, 'uploadById', async (id) => (id === 3 ? { id: 3, team_id: teamId } : null))
}

let written = []
function stubInsert({ duplicate = false } = {}) {
  written = []
  patch(reportsDb, 'insert', async (row) => {
    written.push(row)
    return duplicate ? null : 41
  })
}

// ── filing ─────────────────────────────────────────────────────────────────

test('a report can be filed against a thread, a post or an upload', async () => {
  stubTargets()
  stubInsert()

  const cases = [
    ['team_forum_thread', 5],
    ['team_forum_post', 80],
    ['team_forum_upload', 3],
  ]
  for (const [targetType, targetId] of cases) {
    const result = await reports.file({ team, actor: reporter, targetType, targetId, reason: 'abuse' })
    assert.equal(result.ok, true, targetType)
    assert.equal(result.reportId, 41)
  }
  assert.deepEqual(written.map((r) => r.targetType), cases.map((c) => c[0]))
})

test('a report never changes the content it is about', async () => {
  stubTargets()
  stubInsert()
  // Rule 2 of §5.6, made structural: if filing a report touched a status, then
  // "report" would BE moderation, and the first person to work that out would
  // have found a way to hide anything on the site.
  patch(forumDb, 'setPostStatus', async () => { throw new Error('a report must not moderate') })
  patch(forumDb, 'setThreadFlags', async () => { throw new Error('a report must not moderate') })
  patch(forumDb, 'insertModeration', async () => { throw new Error('a report is not a ledger entry') })

  const result = await reports.file({
    team, actor: reporter, targetType: 'team_forum_post', targetId: 80, reason: 'spam',
  })
  assert.equal(result.ok, true)
})

test('a target in another Team reads as not found', async () => {
  // Otherwise a participant in one Team could file reports carrying another
  // Team's id, and the queue's per-Team filter would quietly be lying.
  stubTargets({ teamId: 999 })
  stubInsert()

  const result = await reports.file({
    team, actor: reporter, targetType: 'team_forum_thread', targetId: 5, reason: 'abuse',
  })
  assert.equal(result.ok, false)
  assert.equal(result.status, 404)
  assert.equal(written.length, 0)
})

test('a target that does not exist reads as not found, not as a 400', async () => {
  stubTargets()
  stubInsert()
  const result = await reports.file({
    team, actor: reporter, targetType: 'team_forum_post', targetId: 9999, reason: 'abuse',
  })
  assert.equal(result.status, 404)
})

test('an unknown target type or reason is refused before any lookup', async () => {
  patch(forumDb, 'threadById', async () => { throw new Error('must not look up') })
  stubInsert()

  assert.equal((await reports.file({
    team, actor: reporter, targetType: 'wiki_page', targetId: 1, reason: 'abuse',
  })).status, 400)

  assert.equal((await reports.file({
    team, actor: reporter, targetType: 'team_forum_thread', targetId: 5, reason: 'because',
  })).status, 400)
})

test('a second open report on the same target answers 409 rather than pretending', async () => {
  stubTargets()
  stubInsert({ duplicate: true })

  const result = await reports.file({
    team, actor: reporter, targetType: 'team_forum_post', targetId: 80, reason: 'abuse',
  })
  assert.equal(result.ok, false)
  assert.equal(result.status, 409)
  // Silently accepting would be friendlier for one tap and dishonest for the
  // second: a member who reports twice because nothing seemed to happen deserves
  // to be told the first one is already in the queue.
  assert.match(result.error, /already reported/i)
})

test('the duplicate is caught by the index, not by a read-then-write', async () => {
  stubTargets()
  // The DB layer turns ER_DUP_ENTRY into a clean null, so two taps that race
  // reach the same answer as two taps that do not. A SELECT-first check would
  // give "usually not a duplicate".
  patch(reportsDb, 'insert', reportsDb.insert)
  const { insert } = require('../src/model/reports/contentReports.db')
  assert.equal(typeof insert, 'function')
})

// ── the queue ──────────────────────────────────────────────────────────────

const row = (over = {}) => ({
  id: 41, target_type: 'team_forum_post', target_id: 80, team_id: 1,
  reporter_user_id: 11, reporter_username: 'wanderer', reason: 'abuse',
  detail: null, status: 'open', handled_by: null, handled_username: null,
  handled_note: null, handled_at: null, created_at: new Date(), ...over,
})

test('the queue resolves every row’s target in batched reads, not one per row', async () => {
  const calls = { threads: 0, posts: 0, uploads: 0 }
  patch(reportsDb, 'list', async () => [
    row({ id: 1, target_type: 'team_forum_post', target_id: 80 }),
    row({ id: 2, target_type: 'team_forum_post', target_id: 81 }),
    row({ id: 3, target_type: 'team_forum_thread', target_id: 5 }),
    row({ id: 4, target_type: 'team_forum_upload', target_id: 3 }),
  ])
  patch(reportsDb, 'postsByIds', async (ids) => {
    calls.posts += 1
    return ids.map((id) => ({
      id, thread_id: 5, author_username: 'someone', body_html: '<p>Rude words</p>',
      status: 'visible', created_at: new Date(), team_id: 1, thread_title: 'Raid night',
    }))
  })
  patch(reportsDb, 'threadsByIds', async (ids) => {
    calls.threads += 1
    return ids.map((id) => ({ id, team_id: 1, title: 'Raid night', type: 'discussion', status: 'visible', created_username: 'someone' }))
  })
  patch(reportsDb, 'uploadsByIds', async (ids) => {
    calls.uploads += 1
    return ids.map((id) => ({
      id, team_id: 1, post_id: 80, uploader_username: 'someone', filename: 'a1b2.png',
      mimetype: 'image/png', byte_size: 184320, created_at: new Date(), deleted_at: null,
    }))
  })

  const queue = await reports.queue({})
  assert.equal(queue.length, 4)
  // Four rows, three reads. The N+1 version is the one that becomes a queue
  // staff avoid opening.
  assert.deepEqual(calls, { threads: 1, posts: 1, uploads: 1 })
})

test('an upload report carries uploader, size and the SNIFFED type', async () => {
  patch(reportsDb, 'list', async () => [row({ target_type: 'team_forum_upload', target_id: 3 })])
  patch(reportsDb, 'threadsByIds', async () => [])
  patch(reportsDb, 'postsByIds', async () => [])
  patch(reportsDb, 'uploadsByIds', async () => [{
    id: 3, team_id: 1, post_id: 80, uploader_username: 'someone', filename: 'a1b2.png',
    mimetype: 'image/png', byte_size: 184320, created_at: new Date(), deleted_at: null,
  }])

  const [item] = await reports.queue({})
  // §5.6's fourth rule — and the payoff for §5.5.4's attribution table being
  // load-bearing rather than bookkeeping.
  assert.equal(item.target.kind, 'upload')
  assert.equal(item.target.uploader, 'someone')
  assert.equal(item.target.byteSize, 184320)
  assert.equal(item.target.mimetype, 'image/png')
  assert.equal(item.target.url, '/uploads/a1b2.png')
})

test('a post report carries a plain-text excerpt, capped', async () => {
  patch(reportsDb, 'list', async () => [row()])
  patch(reportsDb, 'threadsByIds', async () => [])
  patch(reportsDb, 'uploadsByIds', async () => [])
  patch(reportsDb, 'postsByIds', async () => [{
    id: 80, thread_id: 5, author_username: 'someone', status: 'visible',
    body_html: `<p>${'x'.repeat(500)}</p><a href="http://x/">link</a>`,
    created_at: new Date(), team_id: 1, thread_title: 'Raid night',
  }])

  const [item] = await reports.queue({})
  assert.equal(item.target.excerpt.length, reports.EXCERPT_CHARS)
  assert.ok(!item.target.excerpt.includes('<'), 'the queue triages on text, not markup')
})

test('a report whose target is already gone still lists, with a null target', async () => {
  patch(reportsDb, 'list', async () => [row()])
  patch(reportsDb, 'threadsByIds', async () => [])
  patch(reportsDb, 'postsByIds', async () => [])      // hard-deleted since
  patch(reportsDb, 'uploadsByIds', async () => [])

  const [item] = await reports.queue({})
  // Dropping the row would hide the pattern of a member deleting their own
  // content the moment it is reported.
  assert.equal(item.id, 41)
  assert.equal(item.target, null)
})

test('a deleted reporter still shows as somebody, and is marked deleted', async () => {
  patch(reportsDb, 'list', async () => [row({ reporter_user_id: null, reporter_username: null })])
  patch(reportsDb, 'threadsByIds', async () => [])
  patch(reportsDb, 'postsByIds', async () => [])
  patch(reportsDb, 'uploadsByIds', async () => [])

  const [item] = await reports.queue({})
  assert.equal(item.reporter, '[deleted account]')
  assert.equal(item.reporterDeleted, true)
})

// ── handling ───────────────────────────────────────────────────────────────

test('handling records who decided, when, and why', async () => {
  const updates = []
  patch(reportsDb, 'byId', async () => row())
  patch(reportsDb, 'handle', async (id, patchRow) => { updates.push([id, patchRow]); return true })

  const staff = { id: 2, username: 'root' }
  const result = await reports.handle({ id: 41, actor: staff, status: 'dismissed', note: 'Nothing in it.' })
  assert.equal(result.ok, true)
  assert.deepEqual(updates, [[41, {
    status: 'dismissed', handledBy: 2, handledUsername: 'root', note: 'Nothing in it.',
  }]])
})

test('an unknown status is refused, and an absent report is 404', async () => {
  patch(reportsDb, 'byId', async () => null)
  patch(reportsDb, 'handle', async () => { throw new Error('must not write') })

  assert.equal((await reports.handle({
    id: 41, actor: { id: 2, username: 'root' }, status: 'obliterated',
  })).status, 400)

  assert.equal((await reports.handle({
    id: 41, actor: { id: 2, username: 'root' }, status: 'actioned',
  })).status, 404)
})

// ── the negative property ──────────────────────────────────────────────────

test('acceptance: nothing in the report model is reachable by a Team leader', () => {
  // §5.6's whole point is a path that routes AROUND a Team's own leadership. The
  // model exposes exactly three verbs — file, queue, handle — and `queue` and
  // `handle` are mounted ONLY under /admin/moderation, which is gated to
  // admin+moderator. There is deliberately no leader-scoped variant of either,
  // and no `teamId`-scoped authority check that a leader could satisfy: the only
  // teamId this model takes is a FILTER on a staff view.
  //
  // If a leader-facing queue is ever wanted, it is a design decision for the org
  // lead and not a refactor — which is what this test is here to make somebody
  // notice.
  const surface = Object.keys(reports).filter((k) => typeof reports[k] === 'function')
  assert.deepEqual(surface.sort(), ['file', 'handle', 'openCount', 'publicReport', 'queue', 'targetTeamId'])

  // `handle` takes the actor and never a Team: there is no seat at this table for
  // "the leader of the Team the report is about".
  assert.ok(!/isLeader|leaderOf|forumAccess/.test(reports.handle.toString()))
  assert.ok(!/isLeader|leaderOf|forumAccess/.test(reports.queue.toString()))
})