import { getAcpSessionManager } from "../acp/control-plane/manager.js";
import { ACP_SESSION_IDENTITY_RENDERER_VERSION } from "../acp/runtime/session-identifiers.js";
import { resolveOpenClawAgentDir } from "../agents/agent-paths.js";
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 { ensureOpenClawModelsJson } from "../agents/models-config.js";
import { resolveModel } from "../agents/pi-embedded-runner/model.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 { resolveAgentModelPrimaryValue } from "../config/model-input.js";
import { resolveStateDir } from "../config/paths.js";
import { startGmailWatcherWithLogs } from "../hooks/gmail-watcher-lifecycle.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 {
  scheduleRestartSentinelWake,
  shouldWakeFromRestartSentinel,
} from "./server-restart-sentinel.js";
import { startGatewayMemoryBackend } from "./server-startup-memory.js";

const SESSION_LOCK_STALE_MS = 30 * 60 * 1000;

async function prewarmConfiguredPrimaryModel(params: {
  cfg: ReturnType<typeof loadConfig>;
  log: { warn: (msg: string) => void };
}): Promise<void> {
  const explicitPrimary = resolveAgentModelPrimaryValue(params.cfg.agents?.defaults?.model)?.trim();
  if (!explicitPrimary) {
    return;
  }
  const { provider, model } = resolveConfiguredModelRef({
    cfg: params.cfg,
    defaultProvider: DEFAULT_PROVIDER,
    defaultModel: DEFAULT_MODEL,
  });
  const agentDir = resolveOpenClawAgentDir();
  try {
    await ensureOpenClawModelsJson(params.cfg, agentDir);
    const resolved = resolveModel(provider, model, agentDir, params.cfg, {
      skipProviderRuntimeHooks: true,
    });
    if (!resolved.model) {
      throw new Error(
        resolved.error ??
          `Unknown model: ${provider}/${model} (startup warmup only checks static model resolution)`,
      );
    }
  } catch (err) {
    params.log.warn(`startup model warmup failed for ${provider}/${model}: ${String(err)}`);
  }
}

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 };
}) {
  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 Gmail watcher if configured (hooks.gmail.account).
  await startGmailWatcherWithLogs({
    cfg: params.cfg,
    log: params.logHooks,
  });

  // 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 prewarmConfiguredPrimaryModel({
        cfg: params.cfg,
        log: params.log,
      });
      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 !== false) {
    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)}`);
  }

  if (params.cfg.acp?.enabled) {
    void getAcpSessionManager()
      .reconcilePendingSessionIdentities({ cfg: params.cfg })
      .then((result) => {
        if (result.checked === 0) {
          return;
        }
        params.log.warn(
          `acp startup identity reconcile (renderer=${ACP_SESSION_IDENTITY_RENDERER_VERSION}): checked=${result.checked} resolved=${result.resolved} failed=${result.failed}`,
        );
      })
      .catch((err) => {
        params.log.warn(`acp startup identity reconcile failed: ${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 { pluginServices };
}

export const __testing = {
  prewarmConfiguredPrimaryModel,
};
