import { mkdirSync, mkdtempSync, realpathSync } from 'node:fs'
import { tmpdir } from 'node:os'
import { join, resolve } from 'node:path'
import { removeHostTree } from '../../src/main/host-tree-removal'
import { decodePairingOffer, type PairingOffer } from '../../src/shared/pairing'
import { sendRemoteRuntimeRequest } from '../../src/shared/remote-runtime-client'
import type { RuntimeStatus, RuntimeTerminalRead } from '../../src/shared/runtime-types'
import { verifyInstalledCliProfileBehavior } from './node-server-installed-cli-oracle'
import { stopNodeServerVerifierDaemons } from './node-server-verifier-daemon-cleanup'
import { initializeNodeServerVerifierGitWorkspace } from './node-server-verifier-git-fixture'
import { isSameExistingHostPath } from './node-server-verifier-host-path'
import {
  startNodeServerVerifierProcess,
  stopNodeServerVerifierProcess,
  terminateNodeServerVerifierProcess,
  type NodeServerVerifierProcess
} from './node-server-verifier-server-process'
const cliPath = resolve(readArgument('--cli') ?? 'resources/npm-server/dist/cli.js')
const expectedVersion = readArgument('--expected-version') ?? packageVersionFromEnvironment()
// Keep Unix daemon socket paths below platform limits while preserving Windows-native temp paths.
const shortTemporaryRoot = process.platform === 'win32' ? tmpdir() : '/tmp'
const ownedRoot = realpathSync.native(mkdtempSync(join(shortTemporaryRoot, 'orca-nsv-')))
const dataPath = join(ownedRoot, 'state')
const gitPath = join(ownedRoot, 'git-workspace')
const folderPath = join(ownedRoot, 'folder-workspace')

async function main(): Promise<void> {
  let activeServer: NodeServerVerifierProcess | null = null
  try {
    initializeNodeServerVerifierGitWorkspace(gitPath)
    mkdirSync(folderPath)

    const first = await startNodeServerVerifierProcess({ cliPath, dataPath })
    activeServer = first
    const pairing = decodePairingOffer(first.ready.pairing.url)
    await verifyWebClient(first.ready.pairing.webClientUrl)
    await verifyStatus(pairing, first.ready.runtimeId, expectedVersion)
    await verifyBrowserUnavailable(pairing)
    await verifyGitWorkspace(pairing)
    const terminal = await verifyFolderWorkspaceAndTerminal(pairing)
    await verifyInstalledCliProfileBehavior({
      cliPath,
      dataPath,
      expectedRuntimeId: first.ready.runtimeId,
      expectedVersion,
      pairingUrl: first.ready.pairing.url,
      terminalHandle: terminal.handle,
      temporaryRoot: ownedRoot
    })
    await stopNodeServerVerifierProcess(first)
    activeServer = null

    const second = await startNodeServerVerifierProcess({ cliPath, dataPath })
    activeServer = second
    assert(
      second.ready.runtimeId !== first.ready.runtimeId,
      'runtime process identity did not rotate'
    )
    const reconnectedPairing = { ...pairing, endpoint: second.ready.boundEndpoint }
    await verifyStatus(reconnectedPairing, second.ready.runtimeId, expectedVersion)
    const restored = await call<{ terminals: { handle: string; ptyId?: string }[] }>(
      reconnectedPairing,
      'terminal.list',
      { worktree: terminal.workspaceSelector }
    )
    assert(terminal.ptyId, 'created terminal did not expose its daemon identity')
    const reattached = restored.terminals.find((candidate) => candidate.ptyId === terminal.ptyId)
    assert(reattached, 'terminal daemon session was not adopted')
    await waitForTerminalMarker(reconnectedPairing, reattached.handle, terminal.marker)
    await stopNodeServerVerifierProcess(second)
    activeServer = null
    process.stdout.write('Node server runtime verification passed\n')
  } finally {
    if (activeServer?.child.exitCode === null && activeServer.child.signalCode === null) {
      await stopNodeServerVerifierProcess(activeServer).catch(() =>
        terminateNodeServerVerifierProcess(activeServer.child)
      )
    }
    await stopNodeServerVerifierDaemons(dataPath)
    await removeHostTree(ownedRoot)
  }
}

void main().catch((error) => {
  process.stderr.write(
    `${error instanceof Error ? (error.stack ?? error.message) : String(error)}\n`
  )
  process.exitCode = 1
})

function readArgument(flag: string): string | undefined {
  const index = process.argv.indexOf(flag)
  return index === -1 ? undefined : process.argv[index + 1]
}

function packageVersionFromEnvironment(): string {
  return process.env.npm_package_version ?? '0.0.0-dev'
}

async function verifyWebClient(url: string): Promise<void> {
  const response = await fetch(url, { signal: AbortSignal.timeout(15_000) })
  assert(response.ok, `web client returned ${response.status}`)
  assert((await response.text()).includes('<!doctype html>'), 'web client HTML was not served')
}

async function verifyStatus(
  pairing: PairingOffer,
  expectedRuntimeId: string,
  expectedAppVersion: string
): Promise<void> {
  const status = await call<RuntimeStatus>(pairing, 'status.get')
  assert(status.runtimeId === expectedRuntimeId, 'status returned the wrong runtime')
  assert(status.appVersion === expectedAppVersion, 'status returned the wrong package version')
  assert(status.desktopWindowStatus === 'blocked', 'desktop status is not blocked')
  const capabilities = status.capabilities ?? []
  for (const capability of [
    'browser.screencast.v1',
    'browser.headless.v1',
    'browser.certificate-trust.v1'
  ]) {
    assert(
      !capabilities.some((candidate) => candidate === capability),
      `browser capability leaked: ${capability}`
    )
  }
}

async function verifyBrowserUnavailable(pairing: PairingOffer): Promise<void> {
  try {
    await call(pairing, 'browser.tabCreate', { url: 'about:blank' })
  } catch (error) {
    assert(
      error instanceof Error && error.message.includes('does not support browser panes'),
      'browser request did not fail with an unsupported-host error'
    )
    return
  }
  throw new Error('browser request unexpectedly succeeded')
}

async function verifyGitWorkspace(pairing: PairingOffer): Promise<void> {
  const added = await call<{ repo: { id: string; path: string } }>(pairing, 'repo.add', {
    path: gitPath,
    kind: 'git'
  })
  assert(
    isSameExistingHostPath(added.repo.path, gitPath),
    `repo.add returned an unexpected path: ${JSON.stringify(added.repo.path)}`
  )
  const listed = await call<{ worktrees: { id: string; path: string }[] }>(
    pairing,
    'worktree.list',
    { repo: `id:${added.repo.id}` }
  )
  assert(
    listed.worktrees.length > 0,
    `Git worktree unavailable: ${JSON.stringify(listed.worktrees.map((worktree) => worktree.path))}`
  )
}

async function verifyFolderWorkspaceAndTerminal(pairing: PairingOffer): Promise<{
  handle: string
  marker: string
  ptyId: string | undefined
  workspaceSelector: string
}> {
  const group = await call<{ group: { id: string } }>(pairing, 'projectGroup.create', {
    name: 'Package verification',
    parentPath: folderPath,
    createdFrom: 'manual'
  })
  const workspace = await call<{ folderWorkspace: { id: string } }>(
    pairing,
    'folderWorkspace.create',
    { projectGroupId: group.group.id, name: 'Folder workspace', folderPath }
  )
  const marker = `orca-node-server-${Date.now()}`
  const workspaceSelector = `id:folder:${workspace.folderWorkspace.id}`
  const created = await call<{ terminal: { handle: string; ptyId?: string } }>(
    pairing,
    'terminal.create',
    {
      worktree: workspaceSelector,
      command: `node -p "'${marker}:'+process.env.TERM_PROGRAM_VERSION"`
    }
  )
  const versionedMarker = `${marker}:${expectedVersion}`
  await waitForTerminalMarker(pairing, created.terminal.handle, versionedMarker)
  return {
    handle: created.terminal.handle,
    marker: versionedMarker,
    ptyId: created.terminal.ptyId,
    workspaceSelector
  }
}

async function waitForTerminalMarker(
  pairing: PairingOffer,
  handle: string,
  marker: string
): Promise<void> {
  const deadline = Date.now() + 20_000
  while (Date.now() < deadline) {
    const result = await call<{ terminal: RuntimeTerminalRead }>(pairing, 'terminal.read', {
      terminal: handle,
      limit: 200
    })
    if (result.terminal.tail.join('\n').includes(marker)) {
      return
    }
    await new Promise((resolveWait) => setTimeout(resolveWait, 100))
  }
  throw new Error('terminal marker was not observed')
}

async function call<TResult>(
  pairing: PairingOffer,
  method: string,
  params?: unknown
): Promise<TResult> {
  const response = await sendRemoteRuntimeRequest<TResult>(pairing, method, params, 15_000)
  if (!response.ok) {
    throw new Error(`${method} failed: ${response.error.message}`)
  }
  return response.result
}

function assert(condition: unknown, message: string): asserts condition {
  if (!condition) {
    throw new Error(message)
  }
}