import { gunzipSync } from 'node:zlib';
import type { FastifyInstance } from 'fastify';
import * as tar from 'tar-stream';
import type { Headers } from 'tar-stream';
import * as unzipper from 'unzipper';
import type {
  GameAutomationRule,
  ServerAutomationEvent,
  ServerAutomationAction,
  ServerAutomationGitHubReleaseExtractAction,
  ServerAutomationHttpDirectoryExtractAction,
  ServerAutomationInsertBeforeLineAction,
  ServerAutomationWriteFileAction,
} from '@source/shared';
import {
  daemonReadFile,
  daemonSendCommand,
  daemonWriteFile,
  type DaemonNodeConnection,
} from './daemon.js';
import {
  CS2_PERSISTED_SERVER_CFG_PATH,
  CS2_SERVER_CFG_PATH,
  DEFAULT_CS2_SERVER_CFG,
} from './managed-config.js';

const DEFAULT_RELEASE_MAX_BYTES = 256 * 1024 * 1024;
const DEFAULT_DOWNLOAD_TIMEOUT_MS = 120_000;
const AUTOMATION_MARKER_ROOT = '/.gamepanel/automation';
const CS2_GAMEINFO_PATH = '/game/csgo/gameinfo.gi';
const CS2_GAMEINFO_METAMOD_LINE = '\t\t\tGame    csgo/addons/metamod';
const CS2_GAMEINFO_INSERT_BEFORE_PATTERN = '^\\s*Game\\s+csgo\\s*$';
const CS2_GAMEINFO_EXISTS_PATTERN = '^\\s*Game\\s+csgo/addons/metamod\\s*$';
const CS2_GAMEINFO_INSERT_ACTION_ID = 'ensure-cs2-metamod-gameinfo-entry';
const DEFAULT_CS2_GAMEINFO_INSERT_ACTION: ServerAutomationInsertBeforeLineAction = {
  id: CS2_GAMEINFO_INSERT_ACTION_ID,
  type: 'insert_before_line',
  path: CS2_GAMEINFO_PATH,
  line: CS2_GAMEINFO_METAMOD_LINE,
  beforePattern: CS2_GAMEINFO_INSERT_BEFORE_PATTERN,
  existsPattern: CS2_GAMEINFO_EXISTS_PATTERN,
  skipIfExists: true,
};

const DEFAULT_CS2_SERVER_CONFIG_ACTION: ServerAutomationWriteFileAction = {
  id: 'write-cs2-default-server-config',
  type: 'write_file',
  path: `/${CS2_SERVER_CFG_PATH}`,
  data: DEFAULT_CS2_SERVER_CFG,
};

const DEFAULT_CS2_SERVER_CONFIG_SHADOW_ACTION: ServerAutomationWriteFileAction = {
  id: 'write-cs2-persisted-server-config',
  type: 'write_file',
  path: `/${CS2_PERSISTED_SERVER_CFG_PATH}`,
  data: DEFAULT_CS2_SERVER_CFG,
};

const DEFAULT_GAME_AUTOMATION_RULES: Record<string, GameAutomationRule[]> = {
  cs2: [
    {
      id: 'cs2-write-default-server-config',
      event: 'server.install.completed',
      enabled: true,
      runOncePerServer: true,
      continueOnError: false,
      actions: [
        { ...DEFAULT_CS2_SERVER_CONFIG_ACTION },
        { ...DEFAULT_CS2_SERVER_CONFIG_SHADOW_ACTION },
      ],
    },
    {
      id: 'cs2-install-latest-metamod',
      event: 'server.install.completed',
      enabled: true,
      runOncePerServer: true,
      continueOnError: false,
      actions: [
        {
          id: 'install-cs2-metamod',
          type: 'http_directory_extract',
          indexUrl: 'https://mms.alliedmods.net/mmsdrop/2.0/',
          assetNamePattern: '^mmsource-2\\.0\\.0-git\\d+-linux\\.tar\\.gz$',
          destination: '/game/csgo',
          stripComponents: 0,
          maxBytes: DEFAULT_RELEASE_MAX_BYTES,
        },
        { ...DEFAULT_CS2_GAMEINFO_INSERT_ACTION },
      ],
    },
    {
      id: 'cs2-install-latest-counterstrikesharp-runtime',
      event: 'server.install.completed',
      enabled: true,
      runOncePerServer: true,
      continueOnError: false,
      actions: [
        {
          id: 'install-cs2-runtime',
          type: 'github_release_extract',
          owner: 'roflmuffin',
          repo: 'CounterStrikeSharp',
          assetNamePatterns: [
            '^counterstrikesharp-with-runtime-.*linux.*\\.zip$',
            '^counterstrikesharp-with-runtime.*\\.zip$',
          ],
          destination: '/game/csgo',
          stripComponents: 0,
          maxBytes: DEFAULT_RELEASE_MAX_BYTES,
        },
      ],
    },
  ],
};

interface ServerAutomationContext {
  serverId: string;
  serverUuid: string;
  gameSlug: string;
  event: ServerAutomationEvent;
  node: DaemonNodeConnection;
  automationRulesRaw: unknown;
  force?: boolean;
}

export interface ServerAutomationRunResult {
  workflowsMatched: number;
  workflowsExecuted: number;
  workflowsSkipped: number;
  workflowsFailed: number;
  actionFailures: number;
  failures: ServerAutomationFailure[];
}

interface ExtractedFile {
  path: string;
  data: Buffer;
}

export interface ServerAutomationFailure {
  level: 'action' | 'workflow';
  workflowId: string;
  actionId?: string;
  message: string;
}

interface GitHubReleaseAsset {
  name: string;
  browser_download_url: string;
  size: number;
}

interface GitHubReleaseResponse {
  tag_name: string;
  assets: GitHubReleaseAsset[];
}

function isObject(value: unknown): value is Record<string, unknown> {
  return typeof value === 'object' && value !== null;
}

function errorMessage(error: unknown): string {
  if (error instanceof Error) return error.message;
  return String(error);
}

function readWorkflowId(value: unknown): string | null {
  if (!isObject(value)) return null;
  const id = value.id;
  if (typeof id !== 'string' || id.trim() === '') return null;
  return id;
}

function normalizeWorkflow(gameSlug: string, workflow: GameAutomationRule): GameAutomationRule {
  if (gameSlug.toLowerCase() !== 'cs2') return workflow;

  if (workflow.id === 'cs2-write-default-server-config') {
    return {
      ...workflow,
      actions: [
        { ...DEFAULT_CS2_SERVER_CONFIG_ACTION },
        { ...DEFAULT_CS2_SERVER_CONFIG_SHADOW_ACTION },
      ],
    };
  }

  if (workflow.id === 'cs2-install-latest-counterstrikesharp-runtime') {
    const normalizedActions = workflow.actions.map((action) => {
      if (action.type !== 'github_release_extract') return action;
      if (action.id !== 'install-cs2-runtime') return action;

      const destination = (action.destination ?? '').trim();
      if (destination !== '' && destination !== '/') return action;

      return {
        ...action,
        destination: '/game/csgo',
      };
    });

    return {
      ...workflow,
      actions: normalizedActions,
    };
  }

  if (workflow.id === 'cs2-install-latest-metamod') {
    const hasGameInfoAction = workflow.actions.some(
      (action) =>
        action.type === 'insert_before_line' &&
        (action.id === CS2_GAMEINFO_INSERT_ACTION_ID || action.path === CS2_GAMEINFO_PATH),
    );

    if (hasGameInfoAction) return workflow;

    return {
      ...workflow,
      actions: [...workflow.actions, { ...DEFAULT_CS2_GAMEINFO_INSERT_ACTION }],
    };
  }

  return workflow;
}

function asAutomationRules(raw: unknown, gameSlug: string): GameAutomationRule[] {
  const defaults = DEFAULT_GAME_AUTOMATION_RULES[gameSlug.toLowerCase()] ?? [];
  if (!Array.isArray(raw)) {
    return defaults.map((workflow) => normalizeWorkflow(gameSlug, workflow));
  }

  const configured = raw as GameAutomationRule[];
  if (defaults.length === 0) {
    return configured.map((workflow) => normalizeWorkflow(gameSlug, workflow));
  }

  const existingIds = new Set(
    raw.map(readWorkflowId).filter((workflowId): workflowId is string => workflowId !== null),
  );

  const missingDefaults = defaults.filter((workflow) => !existingIds.has(workflow.id));
  if (missingDefaults.length === 0) {
    return configured.map((workflow) => normalizeWorkflow(gameSlug, workflow));
  }

  return [...configured, ...missingDefaults].map((workflow) =>
    normalizeWorkflow(gameSlug, workflow),
  );
}

function markerPath(event: ServerAutomationEvent, workflowId: string): string {
  const cleanId = workflowId.trim().replace(/[^a-zA-Z0-9._-]+/g, '-');
  return `${AUTOMATION_MARKER_ROOT}/${event}/${cleanId}.json`;
}

function isMissingFileError(error: unknown): boolean {
  const message = error instanceof Error ? error.message : String(error);
  return (
    message.includes('No such file or directory') ||
    message.includes('NOT_FOUND') ||
    message.includes('status code 404')
  );
}

function normalizePathSegments(path: string): string[] {
  return path
    .replace(/\\/g, '/')
    .split('/')
    .filter((segment) => segment && segment !== '.' && segment !== '..');
}

function joinServerPath(base: string, relative: string): string {
  const baseSegments = normalizePathSegments(base);
  const relativeSegments = normalizePathSegments(relative);
  return `/${[...baseSegments, ...relativeSegments].join('/')}`.replace(/\/{2,}/g, '/');
}

function normalizeArchivePath(path: string, stripComponents = 0): string | null {
  const segments = normalizePathSegments(path);
  const stripped = segments.slice(Math.max(0, stripComponents));
  if (stripped.length === 0) return null;
  return stripped.join('/');
}

async function hasMarker(
  node: DaemonNodeConnection,
  serverUuid: string,
  event: ServerAutomationEvent,
  workflowId: string,
): Promise<boolean> {
  try {
    await daemonReadFile(node, serverUuid, markerPath(event, workflowId));
    return true;
  } catch (error) {
    if (isMissingFileError(error)) return false;
    throw error;
  }
}

async function writeMarker(
  node: DaemonNodeConnection,
  serverUuid: string,
  event: ServerAutomationEvent,
  workflowId: string,
  payload: Record<string, unknown>,
): Promise<void> {
  await daemonWriteFile(
    node,
    serverUuid,
    markerPath(event, workflowId),
    JSON.stringify(payload, null, 2),
  );
}

function githubHeaders(): Record<string, string> {
  const headers: Record<string, string> = {
    Accept: 'application/vnd.github+json',
    'User-Agent': 'SourceGamePanel/1.0',
  };

  const token = process.env.GITHUB_TOKEN?.trim();
  if (token) {
    headers.Authorization = `Bearer ${token}`;
  }

  return headers;
}

function compileAssetPatterns(patterns: string[]): RegExp[] {
  const compiled: RegExp[] = [];
  const seen = new Set<string>();

  const tryCompile = (pattern: string) => {
    const key = pattern.trim();
    if (!key || seen.has(key)) return;
    try {
      compiled.push(new RegExp(key, 'i'));
      seen.add(key);
    } catch {
      // Ignore invalid regex patterns in configuration.
    }
  };

  for (const pattern of patterns) {
    tryCompile(pattern);

    // Some JSON-stored patterns may be over-escaped (e.g. "\\\\." instead of "\\.").
    // Collapse double backslashes once and compile a fallback variant.
    if (pattern.includes('\\\\')) {
      tryCompile(pattern.replace(/\\\\/g, '\\'));
    }
  }

  return compiled;
}

async function fetchLatestRelease(
  action: ServerAutomationGitHubReleaseExtractAction,
): Promise<GitHubReleaseResponse> {
  const releaseUrl = `https://api.github.com/repos/${action.owner}/${action.repo}/releases/latest`;
  const response = await fetch(releaseUrl, {
    headers: githubHeaders(),
  });

  if (!response.ok) {
    throw new Error(
      `GitHub latest release request failed (${action.owner}/${action.repo}): HTTP ${response.status}`,
    );
  }

  const release = (await response.json()) as GitHubReleaseResponse;
  if (!Array.isArray(release.assets)) {
    throw new Error(`GitHub release payload has no assets (${action.owner}/${action.repo})`);
  }

  return release;
}

interface DirectoryAssetCandidate {
  name: string;
  downloadUrl: string;
}

function extractNumberParts(value: string): number[] {
  const matches = value.match(/\d+/g);
  if (!matches) return [];
  return matches.map((part) => Number.parseInt(part, 10)).filter((num) => Number.isFinite(num));
}

function compareNumberPartsDesc(a: number[], b: number[]): number {
  const maxLength = Math.max(a.length, b.length);
  for (let i = 0; i < maxLength; i += 1) {
    const left = a[i] ?? -1;
    const right = b[i] ?? -1;
    if (left !== right) {
      return right - left;
    }
  }
  return 0;
}

function pickLatestDirectoryAsset(candidates: DirectoryAssetCandidate[]): DirectoryAssetCandidate {
  const sorted = [...candidates].sort((left, right) => {
    const numberDiff = compareNumberPartsDesc(
      extractNumberParts(left.name),
      extractNumberParts(right.name),
    );
    if (numberDiff !== 0) return numberDiff;
    return right.name.localeCompare(left.name);
  });

  return sorted[0] ?? candidates[0]!;
}

function extractDirectoryCandidates(
  html: string,
  indexUrl: string,
  assetPattern: RegExp,
): DirectoryAssetCandidate[] {
  const hrefRegex = /href\s*=\s*(['"])(.*?)\1/gi;
  const candidates: DirectoryAssetCandidate[] = [];

  let match: RegExpExecArray | null = null;
  while ((match = hrefRegex.exec(html)) !== null) {
    const href = (match[2] ?? '').trim();
    if (!href || href.endsWith('/')) continue;

    try {
      const resolvedUrl = new URL(href, indexUrl);
      const filename = decodeURIComponent(
        resolvedUrl.pathname.split('/').filter(Boolean).pop() ?? '',
      );
      if (!filename || !assetPattern.test(filename)) continue;

      candidates.push({
        name: filename,
        downloadUrl: resolvedUrl.toString(),
      });
    } catch {
      // Ignore malformed links.
    }
  }

  return candidates;
}

async function resolveLatestDirectoryAsset(
  action: ServerAutomationHttpDirectoryExtractAction,
): Promise<DirectoryAssetCandidate> {
  let assetPattern: RegExp;
  try {
    assetPattern = new RegExp(action.assetNamePattern, 'i');
  } catch {
    throw new Error(`Invalid assetNamePattern regex for action ${action.id}`);
  }

  const response = await fetch(action.indexUrl, {
    headers: { 'User-Agent': 'SourceGamePanel/1.0' },
  });

  if (!response.ok) {
    throw new Error(
      `Directory listing request failed (${action.indexUrl}): HTTP ${response.status}`,
    );
  }

  const html = await response.text();
  const candidates = extractDirectoryCandidates(html, action.indexUrl, assetPattern);
  if (candidates.length === 0) {
    throw new Error(
      `No matching directory asset for ${action.indexUrl} with pattern: ${action.assetNamePattern}`,
    );
  }

  return pickLatestDirectoryAsset(candidates);
}

async function downloadBinary(url: string, maxBytes: number): Promise<Buffer> {
  const controller = new AbortController();
  const timeout = setTimeout(() => controller.abort(), DEFAULT_DOWNLOAD_TIMEOUT_MS);

  try {
    const response = await fetch(url, {
      headers: {
        'User-Agent': 'SourceGamePanel/1.0',
      },
      redirect: 'follow',
      signal: controller.signal,
    });

    if (!response.ok) {
      throw new Error(`Download failed with HTTP ${response.status}: ${url}`);
    }

    const contentLength = Number(response.headers.get('content-length') ?? '0');
    if (contentLength > maxBytes) {
      throw new Error(`Artifact exceeds max size (${contentLength} > ${maxBytes} bytes)`);
    }

    const buffer = Buffer.from(await response.arrayBuffer());
    if (buffer.length === 0) {
      throw new Error('Downloaded artifact is empty');
    }
    if (buffer.length > maxBytes) {
      throw new Error(`Artifact exceeds max size (${buffer.length} > ${maxBytes} bytes)`);
    }

    return buffer;
  } finally {
    clearTimeout(timeout);
  }
}

async function extractZipFiles(buffer: Buffer, stripComponents = 0): Promise<ExtractedFile[]> {
  const archive = await unzipper.Open.buffer(buffer);
  const files: ExtractedFile[] = [];

  for (const entry of archive.files) {
    if (entry.type !== 'File') continue;

    const normalized = normalizeArchivePath(entry.path, stripComponents);
    if (!normalized) continue;

    files.push({
      path: normalized,
      data: await entry.buffer(),
    });
  }

  return files;
}

function extractTarFiles(buffer: Buffer, stripComponents = 0): Promise<ExtractedFile[]> {
  return new Promise((resolve, reject) => {
    const extract = tar.extract();
    const files: ExtractedFile[] = [];

    extract.on('entry', (header: Headers, stream, next) => {
      const type = header.type ?? 'file';
      const normalized = normalizeArchivePath(header.name, stripComponents);
      const isFileType = type === 'file' || type === 'contiguous-file';

      if (!isFileType || !normalized) {
        stream.resume();
        stream.on('end', next);
        stream.on('error', reject);
        return;
      }

      const chunks: Buffer[] = [];
      stream.on('data', (chunk: Buffer) => {
        chunks.push(Buffer.isBuffer(chunk) ? chunk : Buffer.from(chunk));
      });
      stream.on('end', () => {
        files.push({ path: normalized, data: Buffer.concat(chunks) });
        next();
      });
      stream.on('error', reject);
    });

    extract.on('finish', () => resolve(files));
    extract.on('error', reject);
    extract.end(buffer);
  });
}

async function extractArtifactFiles(
  artifact: Buffer,
  assetName: string,
  stripComponents = 0,
): Promise<ExtractedFile[]> {
  const name = assetName.toLowerCase();

  if (name.endsWith('.zip')) {
    return extractZipFiles(artifact, stripComponents);
  }

  if (name.endsWith('.tar.gz') || name.endsWith('.tgz')) {
    return extractTarFiles(gunzipSync(artifact), stripComponents);
  }

  if (name.endsWith('.tar')) {
    return extractTarFiles(artifact, stripComponents);
  }

  const normalized = normalizeArchivePath(assetName, stripComponents) ?? assetName;
  return [{ path: normalized, data: artifact }];
}

async function executeGitHubReleaseExtract(
  app: FastifyInstance,
  context: ServerAutomationContext,
  action: ServerAutomationGitHubReleaseExtractAction,
): Promise<void> {
  const release = await fetchLatestRelease(action);
  const patterns = compileAssetPatterns(action.assetNamePatterns);

  if (patterns.length === 0) {
    throw new Error(`No valid asset regex pattern for action ${action.id}`);
  }

  const asset = release.assets.find((candidate) =>
    patterns.some((pattern) => pattern.test(candidate.name)),
  );

  if (!asset) {
    throw new Error(
      `No matching release asset for ${action.owner}/${action.repo} with patterns: ${action.assetNamePatterns.join(', ')}`,
    );
  }

  const maxBytes =
    Number(action.maxBytes) > 0 ? Number(action.maxBytes) : DEFAULT_RELEASE_MAX_BYTES;
  const artifact = await downloadBinary(asset.browser_download_url, maxBytes);
  const files = await extractArtifactFiles(
    artifact,
    asset.name,
    Number(action.stripComponents) || 0,
  );

  if (files.length === 0) {
    throw new Error(`Extracted artifact has no files: ${asset.name}`);
  }

  const destination = action.destination ?? '/';

  for (const file of files) {
    const targetPath = joinServerPath(destination, file.path);
    await daemonWriteFile(context.node, context.serverUuid, targetPath, file.data);
  }

  app.log.info(
    {
      serverId: context.serverId,
      serverUuid: context.serverUuid,
      gameSlug: context.gameSlug,
      event: context.event,
      actionId: action.id,
      release: release.tag_name,
      asset: asset.name,
      filesWritten: files.length,
    },
    'Automation action completed: github_release_extract',
  );
}

async function executeHttpDirectoryExtract(
  app: FastifyInstance,
  context: ServerAutomationContext,
  action: ServerAutomationHttpDirectoryExtractAction,
): Promise<void> {
  const selectedAsset = await resolveLatestDirectoryAsset(action);
  const maxBytes =
    Number(action.maxBytes) > 0 ? Number(action.maxBytes) : DEFAULT_RELEASE_MAX_BYTES;
  const artifact = await downloadBinary(selectedAsset.downloadUrl, maxBytes);
  const files = await extractArtifactFiles(
    artifact,
    selectedAsset.name,
    Number(action.stripComponents) || 0,
  );

  if (files.length === 0) {
    throw new Error(`Extracted artifact has no files: ${selectedAsset.name}`);
  }

  const destination = action.destination ?? '/';
  for (const file of files) {
    const targetPath = joinServerPath(destination, file.path);
    await daemonWriteFile(context.node, context.serverUuid, targetPath, file.data);
  }

  app.log.info(
    {
      serverId: context.serverId,
      serverUuid: context.serverUuid,
      gameSlug: context.gameSlug,
      event: context.event,
      actionId: action.id,
      source: action.indexUrl,
      asset: selectedAsset.name,
      filesWritten: files.length,
    },
    'Automation action completed: http_directory_extract',
  );
}

async function executeInsertBeforeLine(
  app: FastifyInstance,
  context: ServerAutomationContext,
  action: ServerAutomationInsertBeforeLineAction,
): Promise<void> {
  const file = await daemonReadFile(context.node, context.serverUuid, action.path);
  const content = file.data.toString('utf8');
  const eol = content.includes('\r\n') ? '\r\n' : '\n';
  const hasTrailingEol = content.endsWith('\n');
  const lines = content.split(/\r?\n/);

  if (hasTrailingEol && lines[lines.length - 1] === '') {
    lines.pop();
  }

  const skipIfExists = action.skipIfExists !== false;
  if (skipIfExists) {
    const existsRegex = action.existsPattern ? new RegExp(action.existsPattern, 'i') : null;

    const alreadyExists = lines.some((line) =>
      existsRegex ? existsRegex.test(line) : line === action.line,
    );

    if (alreadyExists) {
      app.log.info(
        {
          serverId: context.serverId,
          serverUuid: context.serverUuid,
          event: context.event,
          actionId: action.id,
          path: action.path,
        },
        'Automation action skipped: line already present',
      );
      return;
    }
  }

  let beforeRegex: RegExp;
  try {
    beforeRegex = new RegExp(action.beforePattern);
  } catch {
    throw new Error(`Invalid beforePattern regex for action ${action.id}`);
  }

  const insertIndex = lines.findIndex((line) => beforeRegex.test(line));
  if (insertIndex < 0) {
    throw new Error(
      `Could not find insertion point in ${action.path} with pattern: ${action.beforePattern}`,
    );
  }

  const updated = [...lines.slice(0, insertIndex), action.line, ...lines.slice(insertIndex)];
  const output = `${updated.join(eol)}${hasTrailingEol ? eol : ''}`;
  await daemonWriteFile(context.node, context.serverUuid, action.path, output);

  app.log.info(
    {
      serverId: context.serverId,
      serverUuid: context.serverUuid,
      event: context.event,
      actionId: action.id,
      path: action.path,
    },
    'Automation action completed: insert_before_line',
  );
}

async function executeAction(
  app: FastifyInstance,
  context: ServerAutomationContext,
  action: ServerAutomationAction,
): Promise<void> {
  switch (action.type) {
    case 'github_release_extract': {
      await executeGitHubReleaseExtract(app, context, action);
      return;
    }

    case 'http_directory_extract': {
      await executeHttpDirectoryExtract(app, context, action);
      return;
    }

    case 'insert_before_line': {
      await executeInsertBeforeLine(app, context, action);
      return;
    }

    case 'write_file': {
      const payload =
        action.encoding === 'base64' ? Buffer.from(action.data, 'base64') : action.data;

      await daemonWriteFile(context.node, context.serverUuid, action.path, payload);
      app.log.info(
        {
          serverId: context.serverId,
          serverUuid: context.serverUuid,
          event: context.event,
          actionId: action.id,
          path: action.path,
        },
        'Automation action completed: write_file',
      );
      return;
    }

    case 'send_command': {
      await daemonSendCommand(context.node, context.serverUuid, action.command);
      app.log.info(
        {
          serverId: context.serverId,
          serverUuid: context.serverUuid,
          event: context.event,
          actionId: action.id,
          command: action.command,
        },
        'Automation action completed: send_command',
      );
      return;
    }

    default: {
      const unknownAction = action as { type?: unknown };
      throw new Error(`Unsupported automation action type: ${String(unknownAction.type)}`);
    }
  }
}

export async function runServerAutomationEvent(
  app: FastifyInstance,
  context: ServerAutomationContext,
): Promise<ServerAutomationRunResult> {
  const workflows = asAutomationRules(context.automationRulesRaw, context.gameSlug)
    .filter((rule) => isObject(rule))
    .filter((rule) => rule.event === context.event)
    .filter((rule) => rule.enabled !== false)
    .filter((rule) => Array.isArray(rule.actions) && rule.actions.length > 0);

  const result: ServerAutomationRunResult = {
    workflowsMatched: workflows.length,
    workflowsExecuted: 0,
    workflowsSkipped: 0,
    workflowsFailed: 0,
    actionFailures: 0,
    failures: [],
  };

  if (workflows.length === 0) {
    return result;
  }

  for (const workflow of workflows) {
    const runOnce = workflow.runOncePerServer !== false;

    try {
      if (
        runOnce &&
        !context.force &&
        (await hasMarker(context.node, context.serverUuid, context.event, workflow.id))
      ) {
        result.workflowsSkipped += 1;
        app.log.info(
          {
            serverId: context.serverId,
            serverUuid: context.serverUuid,
            gameSlug: context.gameSlug,
            event: context.event,
            workflowId: workflow.id,
          },
          'Skipping automation workflow (already completed)',
        );
        continue;
      }

      for (const action of workflow.actions) {
        try {
          await executeAction(app, context, action);
        } catch (error) {
          const message = errorMessage(error);
          result.actionFailures += 1;
          result.failures.push({
            level: 'action',
            workflowId: workflow.id,
            actionId: action.id,
            message,
          });
          app.log.error(
            {
              err: error,
              errorMessage: message,
              serverId: context.serverId,
              serverUuid: context.serverUuid,
              gameSlug: context.gameSlug,
              event: context.event,
              workflowId: workflow.id,
              actionId: action.id,
            },
            'Automation action failed',
          );

          if (workflow.continueOnError) {
            continue;
          }

          throw error;
        }
      }

      if (runOnce) {
        await writeMarker(context.node, context.serverUuid, context.event, workflow.id, {
          workflowId: workflow.id,
          event: context.event,
          completedAt: new Date().toISOString(),
        });
      }

      app.log.info(
        {
          serverId: context.serverId,
          serverUuid: context.serverUuid,
          gameSlug: context.gameSlug,
          event: context.event,
          workflowId: workflow.id,
        },
        'Automation workflow completed',
      );
      result.workflowsExecuted += 1;
    } catch (error) {
      const message = errorMessage(error);
      result.workflowsFailed += 1;
      result.failures.push({
        level: 'workflow',
        workflowId: workflow.id,
        message,
      });
      app.log.error(
        {
          err: error,
          errorMessage: message,
          serverId: context.serverId,
          serverUuid: context.serverUuid,
          gameSlug: context.gameSlug,
          event: context.event,
          workflowId: workflow.id,
        },
        'Automation workflow failed',
      );
    }
  }

  return result;
}