import { DEFAULT_MODEL, DEFAULT_PROVIDER } from "../agents/defaults.js";
import { loadModelCatalog } from "../agents/model-catalog.js";
import {
  getModelRefStatus,
  resolveConfiguredModelRef,
  resolveHooksGmailModel,
} from "../agents/model-selection.js";
import { resolveAgentSessionDirs } from "../agents/session-dirs.js";
import { cleanStaleLockFiles } from "../agents/session-write-lock.js";
import type { CliDeps } from "../cli/deps.js";
import type { loadConfig } from "../config/config.js";
import { resolveStateDir } from "../config/paths.js";
import { startGmailWatcher } from "../hooks/gmail-watcher.js";
import {
  clearInternalHooks,
  createInternalHookEvent,
  triggerInternalHook,
} from "../hooks/internal-hooks.js";
import { loadInternalHooks } from "../hooks/loader.js";
import { isTruthyEnvValue } from "../infra/env.js";
import type { loadOpenClawPlugins } from "../plugins/loader.js";
import { type PluginServicesHandle, startPluginServices } from "../plugins/services.js";
import { startBrowserControlServerIfEnabled } from "./server-browser.js";
import {
  scheduleRestartSentinelWake,
  shouldWakeFromRestartSentinel,
} from "./server-restart-sentinel.js";
import { startGatewayMemoryBackend } from "./server-startup-memory.js";

const SESSION_LOCK_STALE_MS = 30 * 60 * 1000;

export async function startGatewaySidecars(params: {
  cfg: ReturnType<typeof loadConfig>;
  pluginRegistry: ReturnType<typeof loadOpenClawPlugins>;
  defaultWorkspaceDir: string;
  deps: CliDeps;
  startChannels: () => Promise<void>;
  log: { warn: (msg: string) => void };
  logHooks: {
    info: (msg: string) => void;
    warn: (msg: string) => void;
    error: (msg: string) => void;
  };
  logChannels: { info: (msg: string) => void; error: (msg: string) => void };
  logBrowser: { error: (msg: string) => void };
}) {
  try {
    const stateDir = resolveStateDir(process.env);
    const sessionDirs = await resolveAgentSessionDirs(stateDir);
    for (const sessionsDir of sessionDirs) {
      await cleanStaleLockFiles({
        sessionsDir,
        staleMs: SESSION_LOCK_STALE_MS,
        removeStale: true,
        log: { warn: (message) => params.log.warn(message) },
      });
    }
  } catch (err) {
    params.log.warn(`session lock cleanup failed on startup: ${String(err)}`);
  }

  // Start OpenClaw browser control server (unless disabled via config).
  let browserControl: Awaited<ReturnType<typeof startBrowserControlServerIfEnabled>> = null;
  try {
    browserControl = await startBrowserControlServerIfEnabled();
  } catch (err) {
    params.logBrowser.error(`server failed to start: ${String(err)}`);
  }

  // Start Gmail watcher if configured (hooks.gmail.account).
  if (!isTruthyEnvValue(process.env.OPENCLAW_SKIP_GMAIL_WATCHER)) {
    try {
      const gmailResult = await startGmailWatcher(params.cfg);
      if (gmailResult.started) {
        params.logHooks.info("gmail watcher started");
      } else if (
        gmailResult.reason &&
        gmailResult.reason !== "hooks not enabled" &&
        gmailResult.reason !== "no gmail account configured"
      ) {
        params.logHooks.warn(`gmail watcher not started: ${gmailResult.reason}`);
      }
    } catch (err) {
      params.logHooks.error(`gmail watcher failed to start: ${String(err)}`);
    }
  }

  // Validate hooks.gmail.model if configured.
  if (params.cfg.hooks?.gmail?.model) {
    const hooksModelRef = resolveHooksGmailModel({
      cfg: params.cfg,
      defaultProvider: DEFAULT_PROVIDER,
    });
    if (hooksModelRef) {
      const { provider: defaultProvider, model: defaultModel } = resolveConfiguredModelRef({
        cfg: params.cfg,
        defaultProvider: DEFAULT_PROVIDER,
        defaultModel: DEFAULT_MODEL,
      });
      const catalog = await loadModelCatalog({ config: params.cfg });
      const status = getModelRefStatus({
        cfg: params.cfg,
        catalog,
        ref: hooksModelRef,
        defaultProvider,
        defaultModel,
      });
      if (!status.allowed) {
        params.logHooks.warn(
          `hooks.gmail.model "${status.key}" not in agents.defaults.models allowlist (will use primary instead)`,
        );
      }
      if (!status.inCatalog) {
        params.logHooks.warn(
          `hooks.gmail.model "${status.key}" not in the model catalog (may fail at runtime)`,
        );
      }
    }
  }

  // Load internal hook handlers from configuration and directory discovery.
  try {
    // Clear any previously registered hooks to ensure fresh loading
    clearInternalHooks();
    const loadedCount = await loadInternalHooks(params.cfg, params.defaultWorkspaceDir);
    if (loadedCount > 0) {
      params.logHooks.info(
        `loaded ${loadedCount} internal hook handler${loadedCount > 1 ? "s" : ""}`,
      );
    }
  } catch (err) {
    params.logHooks.error(`failed to load hooks: ${String(err)}`);
  }

  // Launch configured channels so gateway replies via the surface the message came from.
  // Tests can opt out via OPENCLAW_SKIP_CHANNELS (or legacy OPENCLAW_SKIP_PROVIDERS).
  const skipChannels =
    isTruthyEnvValue(process.env.OPENCLAW_SKIP_CHANNELS) ||
    isTruthyEnvValue(process.env.OPENCLAW_SKIP_PROVIDERS);
  if (!skipChannels) {
    try {
      await params.startChannels();
    } catch (err) {
      params.logChannels.error(`channel startup failed: ${String(err)}`);
    }
  } else {
    params.logChannels.info(
      "skipping channel start (OPENCLAW_SKIP_CHANNELS=1 or OPENCLAW_SKIP_PROVIDERS=1)",
    );
  }

  if (params.cfg.hooks?.internal?.enabled) {
    setTimeout(() => {
      const hookEvent = createInternalHookEvent("gateway", "startup", "gateway:startup", {
        cfg: params.cfg,
        deps: params.deps,
        workspaceDir: params.defaultWorkspaceDir,
      });
      void triggerInternalHook(hookEvent);
    }, 250);
  }

  let pluginServices: PluginServicesHandle | null = null;
  try {
    pluginServices = await startPluginServices({
      registry: params.pluginRegistry,
      config: params.cfg,
      workspaceDir: params.defaultWorkspaceDir,
    });
  } catch (err) {
    params.log.warn(`plugin services failed to start: ${String(err)}`);
  }

  void startGatewayMemoryBackend({ cfg: params.cfg, log: params.log }).catch((err) => {
    params.log.warn(`qmd memory startup initialization failed: ${String(err)}`);
  });

  if (shouldWakeFromRestartSentinel()) {
    setTimeout(() => {
      void scheduleRestartSentinelWake({ deps: params.deps });
    }, 750);
  }

  return { browserControl, pluginServices };
}
