// ── Configuration from the site, above the editor ─────────────────────────
//
// `configEdit.test.js` covers the bytes. This covers the decisions made around
// them, and each of these is a way the feature could look fine and be wrong:
//
//   • a save that never re-reads the host writes a browser's stale copy over
//     somebody else's edit;
//   • the raw tier is a whole document, so a locked key can change without
//     anything resembling an edit to a field (D38);
//   • a rollback is a round trip that WORKED, carrying bad news, and reporting
//     it as a failure throws away the only diagnosis there is;
//   • a refusal that is never recorded leaves the operator asking why a setting
//     is not what they set, with nothing to read.

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

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

function withCore(overrides = {}) {
  const queries = []

  require('../core')._reset()
  require('../core').init(
    fakeCtx({
      db: {
        query: (sql, params) => {
          queries.push({ sql: sql.trim().replace(/\s+/g, ' '), params })
          const verb = sql.trim().split(/\s+/)[0].toUpperCase()
          if (verb === 'SELECT') return Promise.resolve([])
          return Promise.resolve({ affectedRows: 1, insertId: 1 })
        },
        pool: {},
      },
      ...overrides,
    }),
  )

  return queries
}

/** A response double that records what a controller decided. */
function fakeRes() {
  const res = { statusCode: 200, body: null }
  res.status = (code) => {
    res.statusCode = code
    return res
  }
  res.json = (body) => {
    res.body = body
    return res
  }
  return res
}

const FILE = `{
  "Gather": { "Wood": 1.0 },
  "Enabled": true
}`

const OWN = `{
  "Host": "127.0.0.1",
  "Port": 7799,
  "QueueCap": 5000,
  "ServerId": "main"
}`

/** Stubs the four calls this controller can make, and records them. */
function stubSidecar({ file = FILE, self = 'RunicGateway', write } = {}) {
  const sidecar = require('../sidecarClient')
  const calls = []

  sidecar.configFile = async (server, asked) => {
    calls.push(['read', asked])
    const text = asked === 'RunicGateway.json' ? OWN : file

    return {
      ok: true,
      status: 'ok',
      data: { kind: 'config.file', path: asked, text, version: `v-${asked}`, bytes: text.length },
    }
  }

  sidecar.configFiles = async () => {
    calls.push(['list'])
    return {
      ok: true,
      status: 'ok',
      data: {
        kind: 'config.catalogue',
        root: '/home/container/oxide/config',
        self,
        files: [
          { path: 'ZoneManager.json', bytes: 40, editable: true, plugin: 'ZoneManager' },
          { path: 'RunicGateway.json', bytes: 90, editable: true, plugin: 'RunicGateway' },
          { path: 'Huge.json', bytes: 9e6, editable: false, reason: 'larger than this bridge will carry', plugin: 'Huge' },
        ],
        plugins: [{ name: 'ZoneManager', title: 'Zone Manager', version: '3.1.14' }],
        truncated: false,
      },
    }
  }

  sidecar.configWrite = async (server, body) => {
    calls.push(['write', body])
    return write || { ok: true, status: 'ok', data: { kind: 'config.report', ok: true, reloaded: true, files: [{ path: body.files[0].path, version: 'v-after' }] } }
  }

  return calls
}

/** The controller's own server lookup, satisfied without a database. */
function stubServer(row = { id: 'main', name: 'Main', sidecarBaseUrl: 'http://x', sidecarTokenEnc: null, protocol: 5 }) {
  const serversDb = require('../model/servers/servers.db')
  const servers = require('../model/servers/servers.model')
  serversDb.getServer = async () => row
  servers.withToken = () => (row ? { id: row.id, baseUrl: row.sidecarBaseUrl, token: 't' } : null)
}

function controller() {
  return require('../router/admin/config.controller')
}

test('the catalogue is grouped by plugin, and an unloaded one is marked rather than dropped', async () => {
  withCore()
  stubSidecar()
  stubServer()

  const res = fakeRes()
  await controller().listFiles({ params: { serverId: 'main' }, query: {} }, res)

  const zone = res.body.plugins.find((p) => p.plugin === 'ZoneManager')
  const bridge = res.body.plugins.find((p) => p.plugin === 'RunicGateway')
  const huge = res.body.plugins.find((p) => p.plugin === 'Huge')

  assert.equal(zone.loaded, true)
  assert.equal(zone.version, '3.1.14')

  // Not loaded, still listed. A config that vanished from the page would read
  // as "the bridge cannot see it", which is a much more alarming problem than
  // the true one.
  assert.equal(huge.loaded, false)
  assert.equal(huge.files[0].editable, false)
  assert.ok(huge.files[0].reason)

  // The bridge's own config is named as such, because it is the one plugin that
  // cannot be reloaded from here.
  assert.equal(bridge.isBridge, true)
  assert.equal(res.body.root, '/home/container/oxide/config')
})

test('a save re-reads the host and refuses a stale version with the current file', async () => {
  withCore()
  stubSidecar()
  stubServer()

  const res = fakeRes()
  await controller().writeFile(
    {
      params: { serverId: 'main' },
      body: { path: 'ZoneManager.json', version: 'v-stale', edits: [{ pointer: ['Enabled'], value: false }] },
    },
    res,
  )

  assert.equal(res.statusCode, 409)
  // The current file comes back, so a person can merge their change rather than
  // retype it from memory.
  assert.equal(res.body.current.version, 'v-ZoneManager.json')
  assert.match(res.body.message, /changed on the server/)
})

test('a form edit is spliced into what is on disk NOW, and sent as whole text', async () => {
  withCore()
  const calls = stubSidecar()
  stubServer()

  const res = fakeRes()
  await controller().writeFile(
    {
      params: { serverId: 'main' },
      body: {
        path: 'ZoneManager.json',
        version: 'v-ZoneManager.json',
        reload: 'ZoneManager',
        edits: [{ pointer: ['Enabled'], value: false }],
      },
    },
    res,
  )

  const [, body] = calls.find((c) => c[0] === 'write')

  assert.equal(body.files.length, 1)
  assert.equal(body.reload, 'ZoneManager')
  assert.equal(body.files[0].version, 'v-ZoneManager.json')
  assert.match(body.files[0].text, /"Enabled": false/)
  // The untouched float, which is the entire reason this path exists.
  assert.match(body.files[0].text, /"Wood": 1\.0/)

  assert.equal(res.statusCode, 200)
  assert.equal(res.body.changed, true)
  assert.equal(res.body.report.reloaded, true)
})

test('a save that changes nothing does not reach the game at all', async () => {
  withCore()
  const calls = stubSidecar()
  stubServer()

  const res = fakeRes()
  await controller().writeFile(
    {
      params: { serverId: 'main' },
      body: {
        path: 'ZoneManager.json',
        version: 'v-ZoneManager.json',
        edits: [{ pointer: ['Enabled'], value: true }],
      },
    },
    res,
  )

  assert.equal(res.body.changed, false)
  // A write would have spent a reload, and a reload is the one part of this
  // feature that can take a plugin down.
  assert.equal(calls.some((c) => c[0] === 'write'), false)
})

test('the raw tier cannot change a locked key, even though it sends a whole document (D38)', async () => {
  withCore()
  const calls = stubSidecar()
  stubServer()

  const res = fakeRes()
  await controller().writeFile(
    {
      params: { serverId: 'main' },
      body: {
        path: 'RunicGateway.json',
        version: 'v-RunicGateway.json',
        text: OWN.replace('7799', '9999'),
      },
    },
    res,
  )

  assert.equal(res.statusCode, 400)
  assert.match(res.body.message, /Port/)
  assert.equal(calls.some((c) => c[0] === 'write'), false)

  // And the rest of our own config is still editable, which is the half of D38
  // that is easy to lose.
  const ok = fakeRes()
  await controller().writeFile(
    {
      params: { serverId: 'main' },
      body: {
        path: 'RunicGateway.json',
        version: 'v-RunicGateway.json',
        text: OWN.replace('5000', '9000'),
      },
    },
    ok,
  )

  assert.equal(ok.statusCode, 200)
  assert.equal(ok.body.changed, true)
})

test('a rollback is a 200 carrying bad news, and the log line survives to the admin', async () => {
  const queries = withCore()
  stubSidecar({
    write: {
      ok: true,
      status: 'ok',
      data: {
        kind: 'config.report',
        ok: false,
        reloaded: false,
        rolledBack: true,
        reason: "'ZoneManager' did not reload within 4s",
        log: 'Error while compiling ZoneManager: expected , at line 14',
        files: [{ path: 'ZoneManager.json', version: 'v-restored' }],
      },
    },
  })
  stubServer()

  const res = fakeRes()
  await controller().writeFile(
    {
      params: { serverId: 'main' },
      body: {
        path: 'ZoneManager.json',
        version: 'v-ZoneManager.json',
        reload: 'ZoneManager',
        edits: [{ pointer: ['Enabled'], value: false }],
      },
    },
    res,
  )

  assert.equal(res.statusCode, 200)
  assert.equal(res.body.report.rolledBack, true)
  assert.match(res.body.report.log, /line 14/)

  const audit = queries.find((q) => q.sql.includes('INSERT INTO rust_config_writes'))
  assert.ok(audit, 'a rollback must be recorded')
  assert.ok(audit.params.includes('rolled-back'))
})

test('a refusal from the game is recorded too, with its own status', async () => {
  const queries = withCore()
  stubSidecar({
    write: { ok: true, status: 'ok', data: { kind: 'config.error', reason: 'reload-self' } },
  })
  stubServer()

  const res = fakeRes()
  await controller().writeFile(
    {
      params: { serverId: 'main' },
      body: {
        path: 'ZoneManager.json',
        version: 'v-ZoneManager.json',
        reload: 'RunicGateway',
        edits: [{ pointer: ['Enabled'], value: false }],
      },
    },
    res,
  )

  assert.equal(res.statusCode, 400)
  assert.match(res.body.message, /cannot be reloaded from the website/)

  const audit = queries.find((q) => q.sql.includes('INSERT INTO rust_config_writes'))
  assert.ok(audit && audit.params.includes('refused'), 'a refusal is part of the audit trail')
})

test('a server that cannot be reached answers 503 with the reason, and records the attempt', async () => {
  const queries = withCore()
  stubSidecar({ write: { ok: false, status: 'http-503', data: null } })
  stubServer()

  const res = fakeRes()
  await controller().writeFile(
    {
      params: { serverId: 'main' },
      body: {
        path: 'ZoneManager.json',
        version: 'v-ZoneManager.json',
        edits: [{ pointer: ['Enabled'], value: false }],
      },
    },
    res,
  )

  assert.equal(res.statusCode, 503)
  assert.match(res.body.message, /not connected/)
  assert.ok(queries.find((q) => q.sql.includes('INSERT INTO rust_config_writes')))
})

test('a path that could not have come from the host is refused before any round trip', async () => {
  withCore()
  const calls = stubSidecar()
  stubServer()

  for (const path of ['../oxide/data/oxide.users.data', '/etc/passwd', 'C:/x.json', 'notjson.txt', '']) {
    const res = fakeRes()
    await controller().readFile({ params: { serverId: 'main' }, query: { path } }, res)
    assert.equal(res.statusCode, 400, `${path} should be refused`)
  }

  assert.equal(calls.length, 0, 'nothing malformed should cost a round trip')

  // And the shapes a host really does list.
  for (const path of ['Kits.json', 'Kits/kits.json', 'My Mod/sub dir/file.json']) {
    assert.equal(require('../model/config/config.model').isPlausiblePath(path), true, path)
  }
})

test('the audit trail records which fields changed, and never a credential', async () => {
  const queries = withCore()
  stubSidecar({ file: '{\n  "Discord Webhook": "https://hooks/1",\n  "Enabled": true\n}' })
  stubServer()

  await controller().writeFile(
    {
      params: { serverId: 'main' },
      user: { id: 7 },
      body: {
        path: 'ZoneManager.json',
        version: 'v-ZoneManager.json',
        edits: [{ pointer: ['Discord Webhook'], value: 'https://hooks/2' }],
      },
    },
    fakeRes(),
  )

  const audit = queries.find((q) => q.sql.includes('INSERT INTO rust_config_writes'))
  const changes = audit.params.find((p) => typeof p === 'string' && p.startsWith('['))

  assert.match(changes, /Discord Webhook/)
  assert.ok(!changes.includes('hooks/1'), 'the old credential must not be recorded')
  assert.ok(!changes.includes('hooks/2'), 'the new credential must not be recorded')
  assert.ok(audit.params.includes(7), 'the person who did it is recorded')
})

test('a file that is already broken on disk still opens, in the tier that can fix it', () => {
  const model = require('../model/config/config.model')
  const shaped = model.shapeFile(
    { path: 'Broken.json', text: '{ "a": }', version: 'v1', bytes: 8 },
    { self: 'RunicGateway' },
  )

  assert.equal(shaped.fields, null)
  assert.ok(shaped.parseError, 'the reason it cannot be drawn is part of the answer')
  assert.equal(shaped.text, '{ "a": }')
})

test('the bridge’s own file is recognised by the plugin’s name, not by a filename we matched', () => {
  const model = require('../model/config/config.model')

  assert.equal(model.isBridgeConfig('RunicGateway.json', 'RunicGateway'), true)
  assert.equal(model.isBridgeConfig('RunicGateway/extra.json', 'RunicGateway'), true)
  assert.equal(model.isBridgeConfig('ZoneManager.json', 'RunicGateway'), false)

  // Renamed on the host: the lock follows the plugin, which is the only thing
  // that knows what it is called.
  assert.equal(model.isBridgeConfig('Bridge.json', 'Bridge'), true)
  assert.deepEqual(model.lockedKeysFor('Bridge.json', 'Bridge'), model.LOCKED_KEYS)

  // And a host that said nothing about itself locks nothing, rather than
  // locking everything or guessing.
  assert.deepEqual(model.lockedKeysFor('RunicGateway.json', null), [])
})