// Point the DB at a closed port before requiring anything that builds the pool —
// these tests inject fake models, so no real query should ever run.
process.env.DB_HOST = '127.0.0.1'
process.env.DB_PORT = '59999'

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

const { mapShardEvent, createTracker } = require('../src/config/notificationStreams')
const pushDispatch = require('../src/utils/pushDispatch')
const db = require('../src/utils/db')

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

// Run body with env keys set, then restore prior values.
function withEnv(vars, fn) {
  const prior = {}
  for (const [k, v] of Object.entries(vars)) {
    prior[k] = process.env[k]
    if (v === undefined) delete process.env[k]
    else process.env[k] = v
  }
  try {
    return fn()
  } finally {
    for (const [k, v] of Object.entries(prior)) {
      if (v === undefined) delete process.env[k]
      else process.env[k] = v
    }
  }
}

// ── mapShardEvent ───────────────────────────────────────────────────────────

test('server.hello / shutdown / crashed map to the public server.status stream', () => {
  const t = createTracker()
  assert.deepEqual(mapShardEvent({ kind: 'server.hello', bootId: 'b1' }, t), [
    { streamId: 'server.status', ref: 'up:b1' },
  ])
  assert.deepEqual(mapShardEvent({ kind: 'server.shutdown' }, t), [{ streamId: 'server.status', ref: 'down' }])
  assert.deepEqual(mapShardEvent({ kind: 'server.crashed' }, t), [{ streamId: 'server.status', ref: 'down' }])
})

test('house.decay INTO idoc yields the public idoc.warning AND the owner-keyed house.idoc', () => {
  const t = createTracker()
  const out = mapShardEvent({ kind: 'house.decay', to: 'IDOC', serial: '0x40', ownerAcct: 'bob' }, t)
  assert.deepEqual(out, [
    { streamId: 'idoc.warning', ref: '0x40' },
    { streamId: 'house.idoc', ref: '0x40', ownerAccount: 'bob' },
  ])
  // A non-IDOC decay stage produces nothing.
  assert.deepEqual(mapShardEvent({ kind: 'house.decay', to: 'Fairly', serial: '0x41' }, t), [])
})

test('champ.update fires champ.start only on the inactive→active transition', () => {
  const t = createTracker()
  // First sight active → start.
  assert.deepEqual(mapShardEvent({ kind: 'champ.update', serial: 'c1', active: true }, t), [
    { streamId: 'champ.start', ref: 'c1' },
  ])
  // Still active → no re-fire.
  assert.deepEqual(mapShardEvent({ kind: 'champ.update', serial: 'c1', active: true }, t), [])
  // Goes inactive, then active again → fires again.
  assert.deepEqual(mapShardEvent({ kind: 'champ.update', serial: 'c1', active: false }, t), [])
  assert.deepEqual(mapShardEvent({ kind: 'champ.update', serial: 'c1', active: true }, t), [
    { streamId: 'champ.start', ref: 'c1' },
  ])
})

test('city.update fires governor.election only on a real governor change, never on first sight', () => {
  const t = createTracker()
  // First sight of the city → no election (could be a reconnect snapshot).
  assert.deepEqual(mapShardEvent({ kind: 'city.update', city: 'Britain', governor: { serial: '0x1' } }, t), [])
  // Same governor → nothing.
  assert.deepEqual(mapShardEvent({ kind: 'city.update', city: 'Britain', governor: { serial: '0x1' } }, t), [])
  // New governor → election.
  assert.deepEqual(mapShardEvent({ kind: 'city.update', city: 'Britain', governor: { serial: '0x2' } }, t), [
    { streamId: 'governor.election', ref: 'Britain' },
  ])
})

test('personal streams are owner-keyed and sensitive kinds never yield a public target', () => {
  const t = createTracker()
  const sale = mapShardEvent({ kind: 'vendor.sale', ownerAcct: 'bob', t: 7 }, t)
  assert.deepEqual(sale, [{ streamId: 'vendor.sale', ref: '7', ownerAccount: 'bob' }])

  const login = mapShardEvent({ kind: 'account.login.attempt', acct: 'bob', ip: '1.2.3.4', t: 9 }, t)
  assert.deepEqual(login, [{ streamId: 'account.login', ref: '9', ownerAccount: 'bob' }])

  // Every personal target carries an ownerAccount (never a bare public push).
  for (const target of [...sale, ...login]) assert.ok(target.ownerAccount, 'personal target must be owner-keyed')

  // A truly sensitive, unmapped kind produces nothing at all.
  assert.deepEqual(mapShardEvent({ kind: 'cheat.fastwalk', acct: 'bob' }, t), [])
  assert.deepEqual(mapShardEvent({ kind: 'admin.audit', actor: 'staff' }, t), [])
})

// ── isAllowedEndpoint (SSRF guard) ──────────────────────────────────────────

test('isAllowedEndpoint pins the configured ntfy origin and rejects everything else', () => {
  withEnv({ NTFY_BASE_URL: 'https://ntfy.example.com', NTFY_ALLOWED_ORIGINS: undefined }, () => {
    assert.equal(pushDispatch.isAllowedEndpoint('https://ntfy.example.com/UPabc'), true)
    assert.equal(pushDispatch.isAllowedEndpoint('https://evil.example.com/x'), false) // wrong origin
    assert.equal(pushDispatch.isAllowedEndpoint('http://ntfy.example.com/x'), false) // not https
    assert.equal(pushDispatch.isAllowedEndpoint('https://127.0.0.1/x'), false) // loopback
    assert.equal(pushDispatch.isAllowedEndpoint('not a url'), false)
  })
})

test('isAllowedEndpoint (no allow-set) permits any public https host but blocks private/loopback/http', () => {
  withEnv({ NTFY_BASE_URL: undefined, NTFY_ALLOWED_ORIGINS: undefined }, () => {
    assert.equal(pushDispatch.isAllowedEndpoint('https://relay.somehost.net/UPabc'), true)
    assert.equal(pushDispatch.isAllowedEndpoint('http://relay.somehost.net/x'), false)
    assert.equal(pushDispatch.isAllowedEndpoint('https://10.0.0.5/x'), false)
    assert.equal(pushDispatch.isAllowedEndpoint('https://192.168.1.10/x'), false)
    assert.equal(pushDispatch.isAllowedEndpoint('https://localhost/x'), false)
  })
})

// ── publish ─────────────────────────────────────────────────────────────────

function captureFetch() {
  const calls = []
  return {
    calls,
    fetchImpl: async (url, opts) => {
      calls.push({ url, opts })
      return { ok: true, status: 200 }
    },
  }
}

test('publish sends a content-free tickle to public subscribers', async () => {
  await withEnv({ NTFY_BASE_URL: undefined, NTFY_ALLOWED_ORIGINS: undefined }, async () => {
    const { calls, fetchImpl } = captureFetch()
    const streamCalls = []
    const pushDevices = {
      endpointsForStream: async (s) => {
        streamCalls.push(s)
        return [{ endpoint: 'https://relay.test/UPa', transport: 'unifiedpush' }]
      },
      endpointsForUserStream: async () => [],
    }
    await pushDispatch.publish('news.post', { ref: '5' }, { pushDevices, fetchImpl })
    assert.deepEqual(streamCalls, ['news.post'])
    assert.equal(calls.length, 1)
    assert.equal(calls[0].url, 'https://relay.test/UPa')
    assert.equal(calls[0].opts.method, 'POST')
    assert.deepEqual(JSON.parse(calls[0].opts.body), { stream: 'news.post', ref: '5' })
  })
})

test('publish (personal) targets only the owner’s subscribed devices', async () => {
  await withEnv({ NTFY_BASE_URL: undefined, NTFY_ALLOWED_ORIGINS: undefined }, async () => {
    const { calls, fetchImpl } = captureFetch()
    const userStreamCalls = []
    const pushDevices = {
      endpointsForStream: async () => {
        throw new Error('public path must not be used for a personal publish')
      },
      endpointsForUserStream: async (userId, s) => {
        userStreamCalls.push([userId, s])
        return [{ endpoint: 'https://relay.test/UPb' }]
      },
    }
    await pushDispatch.publish('vendor.sale', { ref: '9', ownerUserId: 42 }, { pushDevices, fetchImpl })
    assert.deepEqual(userStreamCalls, [[42, 'vendor.sale']])
    assert.equal(calls.length, 1)
  })
})

test('publish skips endpoints that fail the SSRF guard', async () => {
  await withEnv({ NTFY_BASE_URL: undefined, NTFY_ALLOWED_ORIGINS: undefined }, async () => {
    const { calls, fetchImpl } = captureFetch()
    const pushDevices = {
      endpointsForStream: async () => [
        { endpoint: 'http://relay.test/insecure' }, // not https → skipped
        { endpoint: 'https://10.0.0.9/private' }, // private → skipped
        { endpoint: 'https://relay.test/ok' }, // delivered
      ],
      endpointsForUserStream: async () => [],
    }
    await pushDispatch.publish('server.status', { ref: 'down' }, { pushDevices, fetchImpl })
    assert.equal(calls.length, 1)
    assert.equal(calls[0].url, 'https://relay.test/ok')
  })
})

// ── fromShardEvent (owner resolution) ───────────────────────────────────────

test('fromShardEvent resolves a personal event to the owning user, or drops it if unlinked', async () => {
  await withEnv({ NTFY_BASE_URL: undefined, NTFY_ALLOWED_ORIGINS: undefined }, async () => {
    const { calls, fetchImpl } = captureFetch()
    const userStreamCalls = []
    const shardLinks = { getByAccount: async (acct) => (acct === 'mine' ? { userId: 42 } : null) }
    const pushDevices = {
      endpointsForStream: async () => [],
      endpointsForUserStream: async (userId, s) => {
        userStreamCalls.push([userId, s])
        return [{ endpoint: 'https://relay.test/UPc' }]
      },
    }
    const deps = { shardLinks, pushDevices, fetchImpl, tracker: createTracker() }

    await pushDispatch.fromShardEvent({ kind: 'vendor.sale', ownerAcct: 'mine', t: 1 }, deps)
    assert.deepEqual(userStreamCalls, [[42, 'vendor.sale']])
    assert.equal(calls.length, 1)

    // Unlinked account → nobody to notify → no publish.
    userStreamCalls.length = 0
    calls.length = 0
    await pushDispatch.fromShardEvent({ kind: 'vendor.sale', ownerAcct: 'stranger', t: 2 }, deps)
    assert.equal(userStreamCalls.length, 0)
    assert.equal(calls.length, 0)
  })
})

test('fromShardEvent fans a public shard event to the stream’s subscribers', async () => {
  await withEnv({ NTFY_BASE_URL: undefined, NTFY_ALLOWED_ORIGINS: undefined }, async () => {
    const { fetchImpl } = captureFetch()
    const publicCalls = []
    const pushDevices = {
      endpointsForStream: async (s) => {
        publicCalls.push(s)
        return []
      },
      endpointsForUserStream: async () => [],
    }
    await pushDispatch.fromShardEvent(
      { kind: 'server.hello', bootId: 'b1' },
      { pushDevices, fetchImpl, tracker: createTracker() },
    )
    assert.deepEqual(publicCalls, ['server.status'])
  })
})
