/**
 * Two-launch Electron helper for restart-persistence tests.
 *
 * Why: the default `orcaPage` fixture creates a fresh `userDataDir` per test
 * and deletes it on close, which is incompatible with a test that needs to
 * quit the app and relaunch against the *same* on-disk state. This helper
 * owns the shared userDataDir and gives each caller an `app`+`page` pair
 * wired to it.
 */

import {
  _electron as electron,
  expect,
  type ElectronApplication,
  type Page,
  type TestInfo
} from '@stablyai/playwright-test'
import { execSync } from 'node:child_process'
import { existsSync, mkdirSync, mkdtempSync, rmSync, writeFileSync } from 'node:fs'
import { createServer } from 'node:net'
import os from 'node:os'
import path from 'node:path'
import { getE2ECompletedOnboardingProfile } from './e2e-completed-onboarding-profile'
import { getOrcaElectronLaunchArgs } from './electron-launch-args'
import { cleanupE2EDaemons, closeElectronAppForE2E } from './electron-process-shutdown'
import {
  assertElectronResolvedIsolatedHome,
  createElectronHomeIsolation,
  type ElectronHomeIsolation
} from './electron-home-isolation'

type LaunchedOrca = {
  app: ElectronApplication
  page: Page
}

type LaunchOptions = {
  /**
   * Called for each chunk the relaunched main process writes to stderr. The
   * listener is attached before `firstWindow()` resolves so main-process
   * startup logs (e.g. the daemon health-check guard) can't be emitted before
   * the test starts capturing.
   */
  onStderr?: (chunk: string) => void
  /** Merged into this launch only (not baked into the session's shared env). */
  extraEnv?: Record<string, string>
}

type RestartSession = {
  userDataDir: string
  seedCodexResumeRollout: (sessionId: string, cwd: string) => string
  launch: (options?: LaunchOptions) => Promise<LaunchedOrca>
  /** Gracefully close a launch, letting beforeunload flush session state. */
  close: (app: ElectronApplication) => Promise<void>
  /** Remove the shared userDataDir after the test is done. */
  dispose: () => Promise<void>
}

async function delay(ms: number): Promise<void> {
  return new Promise((resolve) => {
    const timeout = setTimeout(resolve, ms)
    timeout.unref?.()
  })
}

async function reserveRestartRuntimeWsPort(): Promise<number> {
  const server = createServer()
  return new Promise<number>((resolve, reject) => {
    server.once('error', reject)
    server.listen(0, '127.0.0.1', () => {
      const address = server.address()
      if (!address || typeof address === 'string') {
        server.close()
        reject(new Error('Restart fixture could not reserve a runtime WebSocket port'))
        return
      }
      server.close((error) => (error ? reject(error) : resolve(address.port)))
    })
  })
}

async function removeProfileDir(userDataDir: string): Promise<void> {
  for (let attempt = 0; attempt < 5; attempt += 1) {
    try {
      rmSync(userDataDir, { recursive: true, force: true })
      return
    } catch (error) {
      if (attempt === 4) {
        throw error
      }
      // Why: on Windows, taskkill can return before Electron/PTY handles are
      // fully released, making immediate temp-profile deletion flaky.
      await delay(250)
    }
  }
}

function shouldLaunchHeadful(testInfo: TestInfo): boolean {
  return testInfo.project.metadata.orcaHeadful === true
}

function createRestartLaunchIsolation(
  userDataDir: string,
  headful: boolean,
  extraEnv: Record<string, string>
): ElectronHomeIsolation {
  const { ELECTRON_RUN_AS_NODE: _unused, ...cleanEnv } = process.env
  void _unused
  return createElectronHomeIsolation({
    inheritedEnv: cleanEnv,
    launchEnv: {
      NODE_ENV: 'development',
      ...((process.env.ORCA_E2E_SSH_LOCALHOST === '1' ||
        process.env.ORCA_E2E_SSH_DOCKER === '1' ||
        process.env.ORCA_E2E_NESTED_RUNTIME_SSH === '1') &&
      !cleanEnv.ORCA_RELAY_PATH
        ? { ORCA_RELAY_PATH: path.join(process.cwd(), 'out', 'relay') }
        : {}),
      ...extraEnv,
      ...(headful ? { ORCA_E2E_HEADFUL: '1' } : { ORCA_E2E_HEADLESS: '1' })
    },
    extraEnv: {},
    userDataDir
  })
}

/**
 * Create a restart session tied to a persistent userDataDir.
 *
 * Why: keep the launch wiring identical to the shared fixture (mainPath,
 * env stripping, headful toggle) so behavior differences between fixtures
 * don't leak in as false positives for persistence bugs.
 */
export function createRestartSession(
  testInfo: TestInfo,
  extraEnv: Record<string, string> = {}
): RestartSession {
  const mainPath = path.join(process.cwd(), 'out', 'main', 'index.js')
  const userDataDir = mkdtempSync(path.join(os.tmpdir(), 'orca-e2e-restart-'))
  const headful = shouldLaunchHeadful(testInfo)
  const homeIsolation = createRestartLaunchIsolation(userDataDir, headful, extraEnv)
  let runtimeWsPort: number | null = null

  // Why: this helper bypasses the shared `electronApp` fixture, so it must
  // seed the same completed onboarding profile or first-run overlays cover
  // both launches and obscure restart failures.
  writeFileSync(
    path.join(userDataDir, 'orca-data.json'),
    `${JSON.stringify(getE2ECompletedOnboardingProfile(), null, 2)}\n`
  )

  const seedCodexResumeRollout = (sessionId: string, cwd: string): string => {
    const sessionsDir = path.join(
      homeIsolation.isolatedHome,
      '.codex',
      'sessions',
      '2026',
      '07',
      '28'
    )
    mkdirSync(sessionsDir, { recursive: true })
    const transcriptPath = path.join(sessionsDir, `rollout-2026-07-28T00-00-00-${sessionId}.jsonl`)
    writeFileSync(
      transcriptPath,
      `${JSON.stringify({
        timestamp: '2026-07-28T00:00:00.000Z',
        type: 'session_meta',
        payload: { id: sessionId, cwd }
      })}\n`
    )
    return transcriptPath
  }

  const launch = async (options?: LaunchOptions): Promise<LaunchedOrca> => {
    runtimeWsPort ??= await reserveRestartRuntimeWsPort()
    const app = await electron.launch({
      args: getOrcaElectronLaunchArgs(mainPath, headful),
      env: {
        ...homeIsolation.env,
        ...options?.extraEnv,
        ORCA_E2E_RUNTIME_WS_PORT: String(runtimeWsPort)
      }
    })
    // Why: attach before firstWindow — the main-process daemon guard and the
    // plugin-system startup metrics can both emit before the renderer is ready.
    if (options?.onStderr) {
      const onStderr = options.onStderr
      app.process().stderr?.on('data', (chunk: Buffer) => onStderr(chunk.toString()))
    }
    try {
      const resolvedHome = await app.evaluate(({ app }) => app.getPath('home'))
      assertElectronResolvedIsolatedHome(resolvedHome, homeIsolation)
    } catch (error) {
      await closeElectronAppForE2E(app)
      throw error
    }
    const page = await app.firstWindow({ timeout: 120_000 })
    await page.waitForLoadState('domcontentloaded')
    await page.waitForFunction(() => Boolean(window.__store), null, { timeout: 30_000 })
    return { app, page }
  }

  const close = async (app: ElectronApplication): Promise<void> => {
    await closeElectronAppForE2E(app)
  }

  const dispose = async (): Promise<void> => {
    await cleanupE2EDaemons(userDataDir)
    if (process.env.ORCA_E2E_PRESERVE_RESTART_PROFILE === '1') {
      console.log(`[e2e] Preserved restart profile at ${userDataDir}`)
      return
    }
    if (existsSync(userDataDir)) {
      await removeProfileDir(userDataDir)
    }
  }

  return { userDataDir, seedCodexResumeRollout, launch, close, dispose }
}

/**
 * Attach a repo to the running renderer and wait until a terminal tab is
 * active on its worktree. Matches the shared fixture's setup path so the
 * first-launch state lines up with what real users persist.
 */
export async function attachRepoAndOpenTerminal(page: Page, repoPath: string): Promise<string> {
  if (!isValidGitRepo(repoPath)) {
    throw new Error(`attachRepoAndOpenTerminal: ${repoPath} is not a git repo`)
  }

  const repoId = await page.evaluate(async (repoPath) => {
    const result = await window.api.repos.add({ path: repoPath })
    if ('error' in result) {
      throw new Error(result.error)
    }
    return result.repo.id
  }, repoPath)

  await expect
    .poll(
      () =>
        readRestartRendererState(() =>
          page.evaluate(async (repoId) => {
            const store = window.__store
            if (!store) {
              return false
            }
            // Why: repos.add emits a concurrent refresh whose generation can
            // supersede this fetch; poll until either refresh publishes the repo.
            await store.getState().fetchRepos()
            const repo = store.getState().repos.find((candidate) => candidate.id === repoId)
            if (!repo) {
              return false
            }
            // Why: this restart fixture uses the global e2e repo, whose seeded Git
            // worktree is external to Orca's workspace root after the visibility rollout.
            await store.getState().updateRepo(repo.id, { externalWorktreeVisibility: 'show' })
            return true
          }, repoId)
        ),
      {
        timeout: 30_000,
        message: `attachRepoAndOpenTerminal: expected e2e repo to be loaded: ${repoPath}`
      }
    )
    .toBe(true)

  await page.waitForFunction(
    () => window.__store?.getState().workspaceSessionReady === true,
    null,
    { timeout: 30_000 }
  )

  // Why: fetchWorktrees() is async. Awaiting the outer page.evaluate returns
  // before the Zustand worktree slice has observed the hydrated state, so a
  // single evaluate() that reads worktreesByRepo can see an empty map. Poll
  // the store until the seeded repo's worktree shows up.
  await expect
    .poll(
      async () =>
        readRestartRendererState(() =>
          page.evaluate(async (repoId) => {
            const store = window.__store
            if (!store) {
              return false
            }
            await store.getState().fetchWorktrees(repoId)
            return (store.getState().worktreesByRepo[repoId]?.length ?? 0) > 0
          }, repoId)
        ),
      {
        timeout: 15_000,
        message: 'attachRepoAndOpenTerminal: seeded worktree never surfaced in the store'
      }
    )
    .toBe(true)

  const worktreeId = await page.evaluate((repoId: string) => {
    const store = window.__store
    if (!store) {
      return null
    }
    const state = store.getState()
    // Why: repo identity remains stable when Windows canonicalizes path casing
    // or separators between the IPC and renderer layers.
    const repoWorktrees = state.worktreesByRepo[repoId] ?? []
    const primary = repoWorktrees.find((worktree) => worktree.isMainWorktree) ?? repoWorktrees[0]
    if (!primary) {
      return null
    }
    state.setActiveWorktree(primary.id)
    return primary.id
  }, repoId)

  if (!worktreeId) {
    throw new Error('attachRepoAndOpenTerminal: test repo did not surface in the store')
  }

  return worktreeId
}

export async function readRestartRendererState<T>(read: () => Promise<T>): Promise<T | null> {
  try {
    return await read()
  } catch (error) {
    // Why: initial hydration can replace the renderer document; the enclosing
    // state poll must retry that transition without hiding other failures.
    if (error instanceof Error && error.message.includes('Execution context was destroyed')) {
      return null
    }
    throw error
  }
}

function isValidGitRepo(repoPath: string): boolean {
  if (!repoPath || !existsSync(repoPath)) {
    return false
  }
  try {
    return (
      execSync('git rev-parse --is-inside-work-tree', {
        cwd: repoPath,
        stdio: 'pipe',
        encoding: 'utf8'
      }).trim() === 'true'
    )
  } catch {
    return false
  }
}