#!/usr/bin/env node

import { spawnSync } from 'node:child_process';
import { createHash } from 'node:crypto';
import {
  chmodSync,
  copyFileSync,
  existsSync,
  mkdirSync,
  mkdtempSync,
  readFileSync,
  rmSync,
  writeFileSync,
} from 'node:fs';
import { tmpdir } from 'node:os';
import path from 'node:path';

const SNAPSHOT_SCRIPT = 'scripts/ops/pingora-cutover-status-snapshot.mjs';
const failures = [];
const tmpRoot = mkdtempSync(
  path.join(tmpdir(), 'genarrative-pingora-cutover-snapshot-'),
);

try {
  main();
} finally {
  rmSync(tmpRoot, { recursive: true, force: true });
}

if (failures.length > 0) {
  console.error('[check:pingora-cutover-status-snapshot] FAILED');
  for (const failure of failures) {
    console.error(`- ${failure}`);
  }
  process.exit(1);
}

console.log('[check:pingora-cutover-status-snapshot] OK');

function main() {
  assertScriptShape();
  assertSnapshotSucceedsWithFakeSystemctlAndReleaseRoot();
  assertSnapshotAcceptsExpectedDirectPingoraEnvMode();
  assertSnapshotRejectsDirectPingoraEnvModeDrift();
  assertSnapshotRejectsShadowPingoraEnvModeDrift();
  assertSnapshotRedactsEnvProbeTokens();
  assertFailOnCriticalRejectsEnvDriftWithoutWritingEnv();
  assertFailOnCriticalRejectsMissingDirectCapability();
  assertFailOnCriticalRejectsSystemdPingoraEnvDrift();
  assertFailOnCriticalRejectsReleaseAuditFailure();
  assertRejectsRelativePaths();
  assertRejectsPathArgsWithControlCharacters();
  assertRejectsFilesystemRootReleaseRoot();
  assertRejectsFilesystemRootEnvFiles();
  assertRejectsInvalidTimeout();
  assertRejectsInvalidBoolEnv();
}

function assertScriptShape() {
  const content = readFileSync(SNAPSHOT_SCRIPT, 'utf8');
  assertIncludes(
    content,
    '该脚本只读采集状态',
    '状态快照脚本必须在 usage 中说明只读边界。',
  );
  assertIncludes(
    content,
    'scripts/ops/pingora-current-release-audit.mjs',
    '状态快照必须把 current release 自审脚本纳入 release artifact 采集。',
  );
  assertIncludes(
    content,
    'scripts/ops/pingora-direct-rehearsal-status.mjs',
    '状态快照必须把直连彩排状态脚本纳入 release artifact 采集。',
  );
  assertIncludes(
    content,
    'scripts/ops/pingora-cutover-evidence-audit.mjs',
    '状态快照必须把证据根目录审计脚本纳入 release artifact 采集。',
  );
  assertIncludes(
    content,
    'scripts/ops/pingora-cutover-evidence-verify.mjs',
    '状态快照必须把证据验真脚本纳入 release artifact 采集。',
  );
  assertIncludes(
    content,
    'current-release-audit',
    '状态快照必须执行 current release 自审并把结果纳入 checks。',
  );
  assertIncludes(
    content,
    'releaseManifest',
    '状态快照必须收录 current release manifest 自审结果。',
  );
  assertIncludes(
    content,
    'scripts/ops/production-health-patrol.mjs',
    '状态快照必须能调用 current release 随包生产巡检脚本。',
  );
  assertIncludes(
    content,
    'scripts/check-production-health-patrol-env.mjs',
    '状态快照必须复用 current release 随包 env 复核脚本。',
  );
  assertIncludes(
    content,
    'scripts/check-pingora-release-readiness.mjs',
    '状态快照必须把 release readiness 聚合门禁脚本纳入 release artifact 采集。',
  );
  assertIncludes(
    content,
    'scripts/check-pingora-canary-live.mjs',
    '状态快照必须把 canary live 脚本纳入 release artifact 采集。',
  );
  assertIncludes(
    content,
    'scripts/check-pingora-canary-access-log-parity.mjs',
    '状态快照必须把 canary access log 对账脚本纳入 release artifact 采集。',
  );
  assertIncludes(
    content,
    'AmbientCapabilities=CAP_NET_BIND_SERVICE',
    '状态快照必须记录 Pingora 低端口 capability 是否生效。',
  );
  assertIncludes(
    content,
    '--expected-pingora-env-mode',
    '状态快照必须支持按阶段强制校验 active Pingora env 姿态。',
  );
  assertIncludes(
    content,
    'summarizePingoraEnvPosture',
    '状态快照必须输出 Pingora env shadow/direct 姿态摘要。',
  );
  if (content.includes('writeFile') || content.includes('rmSync(')) {
    failures.push('状态快照脚本不应写文件或删除文件。');
  }
}

function assertSnapshotSucceedsWithFakeSystemctlAndReleaseRoot() {
  const fixture = prepareFixture('direct-ok', {
    gatewayMode: 'pingora-direct',
    publicBaseUrl: 'https://127.0.0.1',
    publicHost: 'example.com',
    directCapability: true,
    pingoraActive: true,
  });
  const result = runSnapshot(fixture, [
    '--phase',
    'post-enable',
    '--expected-gateway-mode',
    'pingora-direct',
    '--expected-public-base-url',
    'https://127.0.0.1',
    '--expected-public-host',
    'example.com',
    '--run-health-patrol',
    '--require-pingora-gateway',
    '--fail-on-critical',
  ]);

  assertStatus(result, 0, 'fake systemctl/release root 下 direct 快照应成功。');
  if (result.status !== 0) {
    return;
  }
  const payload = parseJson(result.stdout, 'direct 快照输出');
  assertEqual(payload.phase, 'post-enable', '快照必须记录阶段标签。');
  assertEqual(
    payload.healthPatrolEnv.values.gatewayMode,
    'pingora-direct',
    '快照必须记录 health patrol gateway mode。',
  );
  assertEqual(
    payload.systemd.pingoraUnit.hasAmbientCapability,
    true,
    'direct 快照必须看到 AmbientCapabilities。',
  );
  assertEqual(
    payload.systemd.pingoraUnit.environmentFileMatchesPingoraEnvFile,
    true,
    'direct 快照必须确认 systemd EnvironmentFile 指向本次 pingora env。',
  );
  assertEqual(
    payload.summary.status,
    'OK',
    'direct 快照所有 fake 检查通过时 summary 应为 OK。',
  );
  assertEqual(
    payload.pingoraEnv?.posture?.mode,
    'direct',
    '状态快照必须能把完整低端口 TLS env 识别为 direct 姿态。',
  );
  assertEqual(
    payload.pingoraEnv?.posture?.directReady,
    true,
    '完整低端口 TLS env 必须标记 directReady=true。',
  );
  const healthPatrolCheck = payload.checks.find(
    (check) => check.name === 'production-health-patrol',
  );
  if (!healthPatrolCheck) {
    failures.push('启用 --run-health-patrol 时快照必须收录生产巡检结果。');
  } else {
    assertIncludes(
      healthPatrolCheck.stdout,
      '"gatewayMode":"pingora-direct"',
      '生产巡检子进程必须读取 health patrol env。',
    );
  }
  const releaseAuditCheck = payload.checks.find(
    (check) => check.name === 'current-release-audit',
  );
  if (!releaseAuditCheck) {
    failures.push('状态快照必须收录 current release 自审结果。');
  } else {
    assertEqual(
      releaseAuditCheck.status,
      'OK',
      '完整 fake release 的 current release 自审应通过。',
    );
    assertEqual(
      releaseAuditCheck.details?.summary?.status,
      'OK',
      '状态快照必须保留 current release 自审 summary。',
    );
    const pingoraChecksum = releaseAuditCheck.details?.checksums?.find(
      (checksum) => checksum.path === 'pingora-gateway',
    );
    if (!pingoraChecksum || pingoraChecksum.matches !== true) {
      failures.push(
        '状态快照必须保留 pingora-gateway checksum 匹配结果。',
      );
    }
    assertEqual(
      releaseAuditCheck.details?.releaseManifest?.status,
      'OK',
      '状态快照必须保留 release manifest 自审状态。',
    );
  }
  const canaryLogParityArtifact = payload.releaseArtifacts.artifacts.find(
    (item) => item.path === 'scripts/check-pingora-canary-access-log-parity.mjs',
  );
  if (!canaryLogParityArtifact || canaryLogParityArtifact.status !== 'OK') {
    failures.push('快照必须确认 current release 已包含 canary access log 对账脚本。');
  }
  const rehearsalStatusArtifact = payload.releaseArtifacts.artifacts.find(
    (item) => item.path === 'scripts/ops/pingora-direct-rehearsal-status.mjs',
  );
  if (!rehearsalStatusArtifact || rehearsalStatusArtifact.status !== 'OK') {
    failures.push('快照必须确认 current release 已包含直连彩排状态脚本。');
  }
  const evidenceAuditArtifact = payload.releaseArtifacts.artifacts.find(
    (item) => item.path === 'scripts/ops/pingora-cutover-evidence-audit.mjs',
  );
  if (!evidenceAuditArtifact || evidenceAuditArtifact.status !== 'OK') {
    failures.push('快照必须确认 current release 已包含证据根目录审计脚本。');
  }
  const commandsLog = readTextFile(fixture.commandsLog, 'fake systemctl 日志');
  assertIncludes(
    commandsLog,
    'systemctl is-active genarrative-pingora-gateway.service',
    '快照必须通过 fake systemctl 检查 Pingora service。',
  );
  assertFileUnchanged(
    fixture.healthEnvFile,
    fixture.originalHealthEnvText,
    '成功快照不应改写 health patrol env。',
  );
}

function assertSnapshotAcceptsExpectedDirectPingoraEnvMode() {
  const fixture = prepareFixture('direct-env-mode-ok', {
    gatewayMode: 'pingora-direct',
    publicBaseUrl: 'https://127.0.0.1',
    publicHost: 'example.com',
    directCapability: true,
    pingoraActive: true,
  });
  const result = runSnapshot(fixture, [
    '--phase',
    'post-enable',
    '--expected-gateway-mode',
    'pingora-direct',
    '--expected-pingora-env-mode',
    'direct',
    '--expected-public-base-url',
    'https://127.0.0.1',
    '--expected-public-host',
    'example.com',
    '--fail-on-critical',
  ]);

  assertStatus(result, 0, 'direct env 姿态符合预期时快照应成功。');
  const payload = parseJson(result.stdout, 'direct env 姿态快照输出');
  assertEqual(
    payload.pingoraEnv?.posture?.expectedMode,
    'direct',
    '快照必须记录 expected Pingora env mode。',
  );
  assertEqual(
    payload.pingoraEnv?.posture?.directReady,
    true,
    'direct env 姿态正例必须 directReady=true。',
  );
}

function assertSnapshotRejectsDirectPingoraEnvModeDrift() {
  const fixture = prepareFixture('direct-env-mode-drift', {
    gatewayMode: 'pingora-direct',
    publicBaseUrl: 'https://127.0.0.1',
    publicHost: 'example.com',
    directCapability: true,
    pingoraActive: true,
    pingoraEnvMode: 'shadow',
  });
  const result = runSnapshot(fixture, [
    '--phase',
    'post-enable',
    '--expected-gateway-mode',
    'pingora-direct',
    '--expected-pingora-env-mode',
    'direct',
    '--expected-public-base-url',
    'https://127.0.0.1',
    '--expected-public-host',
    'example.com',
    '--fail-on-critical',
  ]);

  assertStatus(
    result,
    1,
    '启用后要求 direct env 但 active env 仍是 shadow 时必须失败。',
  );
  const payload = parseJson(result.stdout, 'direct env 漂移快照输出');
  assertEqual(
    payload.pingoraEnv?.status,
    'CRITICAL',
    'direct env 漂移必须标记 pingoraEnv 为 CRITICAL。',
  );
  assertIncludes(
    payload.pingoraEnv?.diagnostics || [],
    'Pingora direct env 要求 tlsListen 已配置',
    'direct env 漂移必须给出缺少 tlsListen 的诊断。',
  );
}

function assertSnapshotRejectsShadowPingoraEnvModeDrift() {
  const fixture = prepareFixture('shadow-env-mode-drift', {
    gatewayMode: 'nginx',
    publicBaseUrl: 'https://example.com',
    publicHost: '',
    directCapability: false,
    pingoraActive: true,
  });
  const result = runSnapshot(fixture, [
    '--phase',
    'post-rollback',
    '--expected-gateway-mode',
    'nginx',
    '--expected-pingora-env-mode',
    'shadow',
    '--expected-public-base-url',
    'https://example.com',
    '--require-empty-public-host',
    '--fail-on-critical',
  ]);

  assertStatus(
    result,
    1,
    '回退后要求 shadow env 但 active env 仍有 direct 配置时必须失败。',
  );
  const payload = parseJson(result.stdout, 'shadow env 漂移快照输出');
  assertEqual(
    payload.pingoraEnv?.posture?.shadowReady,
    false,
    'shadow env 漂移必须标记 shadowReady=false。',
  );
  assertIncludes(
    payload.pingoraEnv?.diagnostics || [],
    'tlsCertFile 为空',
    'shadow env 漂移必须给出 TLS cert 残留诊断。',
  );
}

function assertFailOnCriticalRejectsEnvDriftWithoutWritingEnv() {
  const fixture = prepareFixture('env-drift', {
    gatewayMode: 'nginx',
    publicBaseUrl: 'http://127.0.0.1',
    publicHost: '',
    directCapability: false,
    pingoraActive: false,
  });
  const result = runSnapshot(fixture, [
    '--phase',
    'post-enable',
    '--expected-gateway-mode',
    'pingora-direct',
    '--expected-public-base-url',
    'https://127.0.0.1',
    '--expected-public-host',
    'example.com',
    '--fail-on-critical',
  ]);

  assertStatus(result, 1, 'health patrol env 漂移时 fail-on-critical 必须失败。');
  const payload = parseJson(result.stdout, 'env 漂移快照输出');
  assertEqual(
    payload.healthPatrolEnv.status,
    'CRITICAL',
    'env 漂移必须标记为 CRITICAL。',
  );
  assertFileUnchanged(
    fixture.healthEnvFile,
    fixture.originalHealthEnvText,
    '失败快照不应改写 health patrol env。',
  );
}

function assertSnapshotRedactsEnvProbeTokens() {
  const fixture = prepareFixture('redact-probe-token', {
    gatewayMode: 'pingora-direct',
    publicBaseUrl: 'https://127.0.0.1',
    publicHost: 'example.com',
    directCapability: true,
    pingoraActive: true,
    healthProbeToken: 'health-patrol-secret-token',
    pingoraProbeToken: 'pingora-gateway-secret-token',
  });
  const result = runSnapshot(fixture, [
    '--phase',
    'post-enable',
    '--expected-gateway-mode',
    'pingora-direct',
    '--expected-public-base-url',
    'https://127.0.0.1',
    '--expected-public-host',
    'example.com',
    '--run-health-patrol',
    '--fail-on-critical',
  ]);

  assertStatus(result, 0, '带 probe token 的状态快照应成功。');
  assertNotIncludes(
    result.stdout,
    'health-patrol-secret-token',
    '状态快照 stdout 不能泄露 health patrol probe token 原文。',
  );
  assertNotIncludes(
    result.stdout,
    'pingora-gateway-secret-token',
    '状态快照 stdout 不能泄露 Pingora probe token 原文。',
  );
  const payload = parseJson(result.stdout, 'probe token 脱敏快照输出');
  assertEqual(
    payload.healthPatrolEnv?.values?.hasPingoraProbeToken,
    true,
    '状态快照可以记录 health patrol probe token 是否存在。',
  );
  assertEqual(
    payload.pingoraEnv?.values?.hasProbeToken,
    true,
    '状态快照可以记录 Pingora probe token 是否存在。',
  );
  const healthPatrolCheck = payload.checks?.find(
    (check) => check.name === 'production-health-patrol',
  );
  assertIncludes(
    healthPatrolCheck?.stdout || '',
    '<redacted>',
    '生产巡检 stdout 里的 probe token 必须被脱敏后进入快照。',
  );
  assertIncludes(
    healthPatrolCheck?.stderr || '',
    '<redacted>',
    '生产巡检 stderr 里的 probe token 必须被脱敏后进入快照。',
  );
  assertNotIncludes(
    healthPatrolCheck?.stdout || '',
    'health-patrol-secret-token',
    '生产巡检 stdout 进入快照时不能泄露 health patrol probe token 原文。',
  );
  assertNotIncludes(
    healthPatrolCheck?.stdout || '',
    'pingora-gateway-secret-token',
    '生产巡检 stdout 进入快照时不能泄露 Pingora probe token 原文。',
  );
  assertNotIncludes(
    healthPatrolCheck?.stderr || '',
    'health-patrol-secret-token',
    '生产巡检 stderr 进入快照时不能泄露 health patrol probe token 原文。',
  );
  assertNotIncludes(
    healthPatrolCheck?.stderr || '',
    'pingora-gateway-secret-token',
    '生产巡检 stderr 进入快照时不能泄露 Pingora probe token 原文。',
  );
}

function assertFailOnCriticalRejectsMissingDirectCapability() {
  const fixture = prepareFixture('missing-capability', {
    gatewayMode: 'pingora-direct',
    publicBaseUrl: 'https://127.0.0.1',
    publicHost: 'example.com',
    directCapability: false,
    pingoraActive: true,
  });
  const result = runSnapshot(fixture, [
    '--phase',
    'post-enable',
    '--expected-gateway-mode',
    'pingora-direct',
    '--expected-public-base-url',
    'https://127.0.0.1',
    '--expected-public-host',
    'example.com',
    '--fail-on-critical',
  ]);

  assertStatus(
    result,
    1,
    'direct 模式缺少低端口 capability 时 fail-on-critical 必须失败。',
  );
  const payload = parseJson(result.stdout, '缺 capability 快照输出');
  assertEqual(
    payload.systemd.pingoraUnit.status,
    'CRITICAL',
    '缺少 direct capability 必须标记 Pingora unit 为 CRITICAL。',
  );
}

function assertFailOnCriticalRejectsSystemdPingoraEnvDrift() {
  const fixture = prepareFixture('systemd-pingora-env-drift', {
    gatewayMode: 'pingora-direct',
    publicBaseUrl: 'https://127.0.0.1',
    publicHost: 'example.com',
    directCapability: true,
    pingoraActive: true,
    systemdPingoraEnvFile: 'prefix',
  });
  const result = runSnapshot(fixture, [
    '--phase',
    'post-enable',
    '--expected-gateway-mode',
    'pingora-direct',
    '--expected-public-base-url',
    'https://127.0.0.1',
    '--expected-public-host',
    'example.com',
    '--fail-on-critical',
  ]);

  assertStatus(
    result,
    1,
    'systemd EnvironmentFile 与 --pingora-env-file 漂移时 fail-on-critical 必须失败。',
  );
  const payload = parseJson(result.stdout, 'systemd env 漂移快照输出');
  assertEqual(
    payload.systemd?.pingoraUnit?.environmentFileMatchesPingoraEnvFile,
    false,
    'systemd env 漂移时必须记录 EnvironmentFile 未匹配。',
  );
  assertIncludes(
    payload.systemd?.pingoraUnit?.diagnostics || [],
    'EnvironmentFile 未包含本次 --pingora-env-file',
    'systemd env 漂移时必须给出明确诊断。',
  );
}

function assertFailOnCriticalRejectsReleaseAuditFailure() {
  const fixture = prepareFixture('bad-release-audit', {
    gatewayMode: 'pingora-direct',
    publicBaseUrl: 'https://127.0.0.1',
    publicHost: 'example.com',
    directCapability: true,
    pingoraActive: true,
  });
  writeFileSync(
    path.join(fixture.releaseRoot, 'pingora-gateway.sha256'),
    `${'0'.repeat(64)}  pingora-gateway\n`,
    'utf8',
  );
  const result = runSnapshot(fixture, [
    '--phase',
    'post-enable',
    '--expected-gateway-mode',
    'pingora-direct',
    '--expected-public-base-url',
    'https://127.0.0.1',
    '--expected-public-host',
    'example.com',
    '--require-pingora-gateway',
    '--fail-on-critical',
  ]);

  assertStatus(result, 1, 'current release 自审失败时 snapshot 必须失败。');
  const payload = parseJson(result.stdout, '自审失败快照输出');
  const releaseAuditCheck = payload.checks?.find(
    (check) => check.name === 'current-release-audit',
  );
  if (!releaseAuditCheck || releaseAuditCheck.status !== 'CRITICAL') {
    failures.push('自审失败时 current-release-audit check 必须标记 CRITICAL。');
  }
  const pingoraChecksum = releaseAuditCheck?.details?.checksums?.find(
    (checksum) => checksum.path === 'pingora-gateway',
  );
  if (!pingoraChecksum || pingoraChecksum.status !== 'CRITICAL') {
    failures.push('自审失败时 snapshot 必须保留 CRITICAL checksum 细节。');
  }
}

function assertRejectsRelativePaths() {
  const result = spawnSync(
    'node',
    [SNAPSHOT_SCRIPT, '--release-root', 'build/current'],
    {
      cwd: process.cwd(),
      encoding: 'utf8',
    },
  );
  if ((result.status ?? 0) === 0) {
    failures.push('状态快照必须拒绝相对 release root。');
  }
  assertIncludes(
    `${result.stdout}\n${result.stderr}`,
    '--release-root 必须是绝对路径',
    '相对 release root 必须给出明确错误。',
  );
}

function assertRejectsPathArgsWithControlCharacters() {
  const fixture = prepareFixture('control-character-path', {
    gatewayMode: 'nginx',
    publicBaseUrl: 'http://127.0.0.1',
    publicHost: '',
    directCapability: false,
    pingoraActive: false,
  });
  const result = runSnapshot(fixture, [
    '--release-root',
    `${fixture.releaseRoot}\n--fake-flag`,
  ]);
  if ((result.status ?? 0) === 0) {
    failures.push('状态快照必须拒绝带换行的路径参数。');
  }
  assertIncludes(
    `${result.stdout}\n${result.stderr}`,
    '--release-root 不能包含换行或 NUL 字符',
    '路径参数控制字符负例必须给出明确错误。',
  );
  assertNotIncludes(
    readTextFile(fixture.commandsLog, 'fake systemctl 日志'),
    'systemctl ',
    '路径参数被拒绝时不应执行 systemctl 子命令。',
  );
}

function assertRejectsFilesystemRootReleaseRoot() {
  const result = spawnSync(
    'node',
    [SNAPSHOT_SCRIPT, '--release-root', '/'],
    {
      cwd: process.cwd(),
      encoding: 'utf8',
    },
  );
  if ((result.status ?? 0) === 0) {
    failures.push('状态快照必须拒绝文件系统根目录 release root。');
  }
  assertIncludes(
    `${result.stdout}\n${result.stderr}`,
    '--release-root 不能是文件系统根目录',
    '文件系统根目录 release root 必须给出明确错误。',
  );
}

function assertRejectsFilesystemRootEnvFiles() {
  for (const [flag, expected] of [
    ['--health-patrol-env-file', '--health-patrol-env-file 不能是文件系统根目录'],
    ['--pingora-env-file', '--pingora-env-file 不能是文件系统根目录'],
  ]) {
    const result = spawnSync('node', [SNAPSHOT_SCRIPT, flag, '/'], {
      cwd: process.cwd(),
      encoding: 'utf8',
    });
    if ((result.status ?? 0) === 0) {
      failures.push(`${flag} 使用文件系统根目录时必须失败。`);
    }
    assertIncludes(
      `${result.stdout}\n${result.stderr}`,
      expected,
      `${flag} 指向文件系统根目录必须给出明确错误。`,
    );
  }
}

function assertRejectsInvalidTimeout() {
  const fixture = prepareFixture('invalid-timeout', {
    gatewayMode: 'nginx',
    publicBaseUrl: 'http://127.0.0.1',
    publicHost: '',
    directCapability: false,
    pingoraActive: false,
  });
  const cliResult = runSnapshot(fixture, ['--timeout-ms', '0']);
  if ((cliResult.status ?? 0) === 0) {
    failures.push('状态快照必须拒绝非正数 --timeout-ms。');
  }
  assertIncludes(
    `${cliResult.stdout}\n${cliResult.stderr}`,
    '--timeout-ms 必须是正整数',
    '非法 --timeout-ms 必须给出明确错误。',
  );

  const envResult = runSnapshot(fixture, [], {
    GENARRATIVE_PINGORA_CUTOVER_SNAPSHOT_TIMEOUT_MS: 'abc',
  });
  if ((envResult.status ?? 0) === 0) {
    failures.push('状态快照必须拒绝非法 timeout env。');
  }
  assertIncludes(
    `${envResult.stdout}\n${envResult.stderr}`,
    'GENARRATIVE_PINGORA_CUTOVER_SNAPSHOT_TIMEOUT_MS 必须是正整数',
    '非法 timeout env 必须给出明确错误。',
  );
}

function assertRejectsInvalidBoolEnv() {
  const fixture = prepareFixture('invalid-bool-env', {
    gatewayMode: 'nginx',
    publicBaseUrl: 'http://127.0.0.1',
    publicHost: '',
    directCapability: false,
    pingoraActive: false,
  });
  const cases = [
    {
      env: { GENARRATIVE_PINGORA_CUTOVER_SNAPSHOT_RUN_HEALTH_PATROL: 'ture' },
      expected:
        'GENARRATIVE_PINGORA_CUTOVER_SNAPSHOT_RUN_HEALTH_PATROL 必须是布尔值',
      reason: '状态快照必须拒绝拼写错误的 run health patrol env。',
    },
    {
      env: { GENARRATIVE_PINGORA_CUTOVER_SNAPSHOT_REQUIRE_PINGORA_GATEWAY: 'maybe' },
      expected:
        'GENARRATIVE_PINGORA_CUTOVER_SNAPSHOT_REQUIRE_PINGORA_GATEWAY 必须是布尔值',
      reason: '状态快照必须拒绝非法 require pingora gateway env。',
    },
    {
      env: { GENARRATIVE_PINGORA_CUTOVER_SNAPSHOT_FAIL_ON_CRITICAL: 'enabled' },
      expected:
        'GENARRATIVE_PINGORA_CUTOVER_SNAPSHOT_FAIL_ON_CRITICAL 必须是布尔值',
      reason: '状态快照必须拒绝非法 fail on critical env。',
    },
  ];

  for (const testCase of cases) {
    const result = runSnapshot(fixture, [], testCase.env);
    if ((result.status ?? 0) === 0) {
      failures.push(testCase.reason);
    }
    assertIncludes(
      `${result.stdout}\n${result.stderr}`,
      testCase.expected,
      `${testCase.reason} 必须给出明确错误。`,
    );
  }
}

function prepareFixture(name, options) {
  const root = path.join(tmpRoot, name);
  const releaseRoot = path.join(root, 'current');
  const fakeBin = path.join(root, 'bin');
  const commandsLog = path.join(root, 'commands.log');
  const healthEnvFile = path.join(root, 'etc', 'health-patrol.env');
  const pingoraEnvFile = path.join(root, 'etc', 'pingora-gateway.env');

  mkdirSync(fakeBin, { recursive: true });
  mkdirSync(path.dirname(healthEnvFile), { recursive: true });
  prepareReleaseRoot(releaseRoot);
  writeFileSync(commandsLog, '', 'utf8');

  const healthEnvText = [
    `GENARRATIVE_HEALTH_PATROL_GATEWAY_MODE=${options.gatewayMode}`,
    `GENARRATIVE_HEALTH_PATROL_PUBLIC_BASE_URL=${options.publicBaseUrl}`,
    `GENARRATIVE_HEALTH_PATROL_PUBLIC_HOST=${options.publicHost}`,
    'GENARRATIVE_HEALTH_PATROL_API_BASE_URL=http://127.0.0.1:8082',
    'GENARRATIVE_HEALTH_PATROL_SPACETIME_BASE_URL=http://127.0.0.1:3101',
    `GENARRATIVE_HEALTH_PATROL_PINGORA_PROBE_TOKEN=${options.healthProbeToken || ''}`,
    '',
  ].join('\n');
  writeFileSync(healthEnvFile, healthEnvText, 'utf8');
  writeFileSync(
    pingoraEnvFile,
    pingoraEnvText(options),
    'utf8',
  );
  writeFileSync(
    path.join(fakeBin, 'systemctl'),
    fakeSystemctlScript(commandsLog, releaseRoot, pingoraEnvFile, options),
    'utf8',
  );
  chmodExecutable(path.join(fakeBin, 'systemctl'));

  return {
    root,
    releaseRoot,
    fakeBin,
    commandsLog,
    healthEnvFile,
    pingoraEnvFile,
    originalHealthEnvText: healthEnvText,
  };
}

function pingoraEnvText(options) {
  const lines =
    options.pingoraEnvMode === 'shadow'
      ? [
          'GENARRATIVE_PINGORA_GATEWAY_LISTEN=127.0.0.1:18081',
          'GENARRATIVE_PINGORA_GATEWAY_TLS_LISTEN=',
          'GENARRATIVE_PINGORA_GATEWAY_HTTP_REDIRECT_LISTEN=',
          'GENARRATIVE_PINGORA_GATEWAY_TLS_CERT_FILE=',
          'GENARRATIVE_PINGORA_GATEWAY_TLS_KEY_FILE=',
          'GENARRATIVE_PINGORA_GATEWAY_FORWARDED_PROTO=http',
        ]
      : [
          'GENARRATIVE_PINGORA_GATEWAY_LISTEN=127.0.0.1:18081',
          'GENARRATIVE_PINGORA_GATEWAY_TLS_LISTEN=0.0.0.0:443',
          'GENARRATIVE_PINGORA_GATEWAY_HTTP_REDIRECT_LISTEN=0.0.0.0:80',
          'GENARRATIVE_PINGORA_GATEWAY_TLS_CERT_FILE=/etc/letsencrypt/live/example/fullchain.pem',
          'GENARRATIVE_PINGORA_GATEWAY_TLS_KEY_FILE=/etc/letsencrypt/live/example/privkey.pem',
          'GENARRATIVE_PINGORA_GATEWAY_FORWARDED_PROTO=https',
        ];
  return [
    ...lines,
    `GENARRATIVE_PINGORA_GATEWAY_PROBE_TOKEN=${options.pingoraProbeToken || 'fake-token'}`,
    '',
  ].join('\n');
}

function prepareReleaseRoot(releaseRoot) {
  for (const dir of [
    'scripts',
    'scripts/ops',
    'scripts/deploy',
    'deploy/systemd',
    'deploy/nginx',
    'deploy/env',
    'deploy/pingora',
  ]) {
    mkdirSync(path.join(releaseRoot, dir), { recursive: true });
  }
  writeFileSync(
    path.join(releaseRoot, 'api-server'),
    '#!/usr/bin/env bash\n',
    'utf8',
  );
  chmodExecutable(path.join(releaseRoot, 'api-server'));
  writeChecksum(releaseRoot, 'api-server');
  writeFileSync(
    path.join(releaseRoot, 'pingora-gateway'),
    '#!/usr/bin/env bash\n',
    'utf8',
  );
  chmodExecutable(path.join(releaseRoot, 'pingora-gateway'));
  writeChecksum(releaseRoot, 'pingora-gateway');
  copyFileSync(
    SNAPSHOT_SCRIPT,
    path.join(releaseRoot, 'scripts/ops/pingora-cutover-status-snapshot.mjs'),
  );
  copyFileSync(
    'scripts/check-production-health-patrol-env.mjs',
    path.join(releaseRoot, 'scripts/check-production-health-patrol-env.mjs'),
  );
  writeFileSync(
    path.join(releaseRoot, 'scripts/ops/production-health-patrol.mjs'),
    [
      '#!/usr/bin/env node',
      'console.log(JSON.stringify({',
      '  status: "OK",',
      '  gatewayMode: process.env.GENARRATIVE_HEALTH_PATROL_GATEWAY_MODE || "",',
      '  hasPingoraProbeToken: Boolean(process.env.GENARRATIVE_HEALTH_PATROL_PINGORA_PROBE_TOKEN || process.env.GENARRATIVE_PINGORA_GATEWAY_PROBE_TOKEN),',
      '  probeEcho: `${process.env.GENARRATIVE_HEALTH_PATROL_PINGORA_PROBE_TOKEN || ""}:${process.env.GENARRATIVE_PINGORA_GATEWAY_PROBE_TOKEN || ""}`,',
      '}));',
      'console.error(`probe stderr ${process.env.GENARRATIVE_HEALTH_PATROL_PINGORA_PROBE_TOKEN || ""}:${process.env.GENARRATIVE_PINGORA_GATEWAY_PROBE_TOKEN || ""}`);',
      '',
    ].join('\n'),
    'utf8',
  );
  for (const file of [
    'scripts/database-backup-to-oss.mjs',
    'scripts/ops/pingora-current-release-audit.mjs',
    'scripts/ops/pingora-direct-rehearsal-status.mjs',
    'scripts/ops/pingora-cutover-evidence-audit.mjs',
    'scripts/ops/pingora-cutover-evidence-bundle.mjs',
    'scripts/ops/pingora-cutover-command-evidence.mjs',
    'scripts/ops/pingora-cutover-evidence-verify.mjs',
    'scripts/check-pingora-release-readiness.mjs',
    'scripts/check-pingora-direct-preflight.mjs',
    'scripts/check-pingora-direct-live.mjs',
    'scripts/check-pingora-canary-live.mjs',
    'scripts/check-pingora-canary-access-log-parity.mjs',
    'scripts/deploy/pingora-direct-enable.sh',
    'scripts/deploy/pingora-direct-rollback.sh',
    'scripts/deploy/pingora-realpath-canary-enable.sh',
    'scripts/deploy/pingora-realpath-canary-disable.sh',
    'scripts/deploy/pingora-health-patrol-env-switch.mjs',
    'scripts/deploy/pingora-gateway-env-shadow-switch.mjs',
    'scripts/deploy/pingora-tls-cert-sync.mjs',
    'deploy/systemd/genarrative-pingora-gateway.service',
    'deploy/systemd/genarrative-pingora-gateway-direct-entry.conf',
    'deploy/nginx/snippets/genarrative-pingora-canary.conf',
    'deploy/nginx/snippets/genarrative-pingora-realpath-canary.conf',
    'deploy/env/health-patrol.env.example',
    'deploy/env/pingora-direct-live.env.example',
    'deploy/env/pingora-canary-live.env.example',
    'deploy/pingora/pingora-gateway.env.example',
    'deploy/pingora/nginx-route-parity.matrix.json',
  ]) {
    const target = path.join(releaseRoot, file);
    mkdirSync(path.dirname(target), { recursive: true });
    if (existsSync(file)) {
      copyFileSync(file, target);
    } else {
      writeFileSync(target, '', 'utf8');
    }
  }
  for (const file of [
    'scripts/deploy/pingora-direct-enable.sh',
    'scripts/deploy/pingora-direct-rollback.sh',
    'scripts/deploy/pingora-realpath-canary-enable.sh',
    'scripts/deploy/pingora-realpath-canary-disable.sh',
    'scripts/deploy/pingora-health-patrol-env-switch.mjs',
    'scripts/deploy/pingora-gateway-env-shadow-switch.mjs',
    'scripts/deploy/pingora-tls-cert-sync.mjs',
  ]) {
    chmodExecutable(path.join(releaseRoot, file));
  }
  writeReleaseManifest(releaseRoot);
}

function fakeSystemctlScript(commandsLog, releaseRoot, pingoraEnvFile, options) {
  const capabilityLines = options.directCapability
    ? [
        'AmbientCapabilities=CAP_NET_BIND_SERVICE',
        'CapabilityBoundingSet=CAP_NET_BIND_SERVICE',
      ]
    : [];
  const inactivePingora = options.pingoraActive ? 'active' : 'inactive';
  const releaseBinaryPath = path.join(releaseRoot, 'pingora-gateway');
  const systemdPingoraEnvFile =
    options.systemdPingoraEnvFile === 'prefix'
      ? `${pingoraEnvFile}.bak`
      : options.systemdPingoraEnvFile || pingoraEnvFile;
  return [
    '#!/usr/bin/env bash',
    `printf 'systemctl %s\\n' "$*" >> ${shellQuote(commandsLog)}`,
    'if [[ "$1" == "is-active" ]]; then',
    '  if [[ "$2" == "genarrative-pingora-gateway.service" ]]; then',
    `    echo ${shellQuote(inactivePingora)}`,
    `    [[ ${shellQuote(inactivePingora)} == "active" ]] && exit 0 || exit 3`,
    '  fi',
    '  echo active',
    '  exit 0',
    'fi',
    'if [[ "$1" == "cat" ]]; then',
    '  cat <<UNIT',
    '[Service]',
    'User=genarrative',
    `EnvironmentFile=-${systemdPingoraEnvFile}`,
    ...capabilityLines,
    'ExecStart=/opt/genarrative/current/pingora-gateway',
    'UNIT',
    '  exit 0',
    'fi',
    'if [[ "$1" == "show" ]]; then',
    '  cat <<SHOW',
    'FragmentPath=/etc/systemd/system/genarrative-pingora-gateway.service',
    'DropInPaths=/etc/systemd/system/genarrative-pingora-gateway.service.d/direct-entry.conf',
    'User=genarrative',
    `ExecStart={ path=${releaseBinaryPath} ; argv[]=${releaseBinaryPath} ; }`,
    'SHOW',
    '  exit 0',
    'fi',
    'exit 1',
    '',
  ].join('\n');
}

function runSnapshot(fixture, args, extraEnv = {}) {
  return spawnSync(
    'node',
    [
      SNAPSHOT_SCRIPT,
      '--release-root',
      fixture.releaseRoot,
      '--health-patrol-env-file',
      fixture.healthEnvFile,
      '--pingora-env-file',
      fixture.pingoraEnvFile,
      ...args,
    ],
    {
      cwd: process.cwd(),
      encoding: 'utf8',
      env: {
        ...process.env,
        ...extraEnv,
        PATH: `${fixture.fakeBin}:${process.env.PATH || ''}`,
      },
    },
  );
}

function chmodExecutable(filePath) {
  chmodSync(filePath, 0o755);
}

function writeChecksum(directory, fileName) {
  const content = readFileSync(path.join(directory, fileName));
  const checksum = createHash('sha256').update(content).digest('hex');
  writeFileSync(
    path.join(directory, `${fileName}.sha256`),
    `${checksum}  ${fileName}\n`,
    'utf8',
  );
}

function writeReleaseManifest(releaseRoot) {
  writeFileSync(
    path.join(releaseRoot, 'release-manifest.api-server.json'),
    `${JSON.stringify(
      {
        version: 'check-cutover-snapshot',
        component_type: 'api-server',
        artifacts: [
          {
            component: 'api-server',
            path: 'api-server',
            checksum_path: 'api-server.sha256',
          },
          {
            component: 'pingora-gateway',
            path: 'pingora-gateway',
            checksum_path: 'pingora-gateway.sha256',
          },
        ],
      },
      null,
      2,
    )}\n`,
    'utf8',
  );
}

function shellQuote(value) {
  return `'${String(value).replace(/'/g, "'\\''")}'`;
}

function parseJson(text, label) {
  try {
    return JSON.parse(text);
  } catch (error) {
    failures.push(`${label} 不是合法 JSON: ${error.message}`);
    return {};
  }
}

function readTextFile(filePath, label) {
  try {
    return readFileSync(filePath, 'utf8');
  } catch (error) {
    failures.push(`无法读取 ${label}: ${error.message}`);
    return '';
  }
}

function assertFileUnchanged(filePath, expected, reason) {
  const actual = readTextFile(filePath, filePath);
  if (actual !== expected) {
    failures.push(reason);
  }
}

function assertStatus(result, expected, reason) {
  if ((result.status ?? 0) !== expected) {
    failures.push(
      `${reason} 实际退出码 ${result.status}。\nstdout:\n${result.stdout}\nstderr:\n${result.stderr}`,
    );
  }
}

function assertEqual(actual, expected, reason) {
  if (actual !== expected) {
    failures.push(`${reason} 实际 ${actual}，预期 ${expected}。`);
  }
}

function assertIncludes(value, expected, reason) {
  const haystack = Array.isArray(value) ? value.join('\n') : String(value);
  if (!haystack.includes(expected)) {
    failures.push(`${reason} 缺少: ${expected}`);
  }
}

function assertNotIncludes(value, unexpected, reason) {
  const haystack = Array.isArray(value) ? value.join('\n') : String(value);
  if (haystack.includes(unexpected)) {
    failures.push(`${reason} 不应包含: ${unexpected}`);
  }
}