import path from "node:path";
import os from "node:os";
import type { OpenClawPluginApi } from "openclaw/plugin-sdk";
import { IdentityRegistry } from "./core/identity-registry.js";
import { ChannelStore } from "./core/channel-store.js";
import { scanPaddedCell } from "./core/padded-cell.js";
import { startNoReplyApi, stopNoReplyApi } from "./core/no-reply-process.js";
import { startModeratorPresence, stopModeratorPresence } from "./moderator-presence.js";
import { registerBeforeModelResolveHook } from "./hooks/before-model-resolve.js";
import { registerAgentEndHook } from "./hooks/agent-end.js";
import { registerMessageReceivedHook } from "./hooks/message-received.js";
import { registerDirigentTools } from "./tools/register-tools.js";
import { registerSetChannelModeCommand } from "./commands/set-channel-mode-command.js";
import { registerAddGuildCommand } from "./commands/add-guild-command.js";
import { registerControlPage } from "./web/control-page.js";
import { sendModeratorMessage, sendAndDelete } from "./core/moderator-discord.js";
import { setSpeakerList } from "./turn-manager.js";
import { fetchVisibleChannelBotAccountIds } from "./core/channel-members.js";

type PluginConfig = {
  moderatorBotToken?: string;
  noReplyProvider?: string;
  noReplyModel?: string;
  noReplyPort?: number;
  scheduleIdentifier?: string;
  identityFilePath?: string;
  channelStoreFilePath?: string;
};

function normalizeConfig(api: OpenClawPluginApi): Required<PluginConfig> {
  const cfg = (api.pluginConfig ?? {}) as PluginConfig;
  return {
    moderatorBotToken: cfg.moderatorBotToken ?? "",
    noReplyProvider: cfg.noReplyProvider ?? "dirigent",
    noReplyModel: cfg.noReplyModel ?? "no-reply",
    noReplyPort: Number(cfg.noReplyPort ?? 8787),
    scheduleIdentifier: cfg.scheduleIdentifier ?? "➡️",
    identityFilePath: cfg.identityFilePath ?? path.join(os.homedir(), ".openclaw", "dirigent-identity.json"),
    channelStoreFilePath: cfg.channelStoreFilePath ?? path.join(os.homedir(), ".openclaw", "dirigent-channels.json"),
  };
}

/**
 * Gateway lifecycle events (gateway_start / gateway_stop) are global — fired once
 * when the gateway process starts/stops, not per agent session.  We guard these on
 * globalThis so only the first register() call adds the lifecycle handlers.
 *
 * Agent-session events (before_model_resolve, agent_end, message_received) are
 * delivered via the api instance that belongs to each individual agent session.
 * OpenClaw creates a new VM context (and calls register() again) for each hot-reload
 * within a session.  We register those handlers unconditionally — event-level dedup
 * (WeakSet / runId Set, also stored on globalThis) prevents double-processing.
 *
 * All VM contexts share the real globalThis because they run in the same Node.js
 * process as openclaw-gateway.
 */
const _G = globalThis as Record<string, unknown>;
const _GATEWAY_LIFECYCLE_KEY = "_dirigentGatewayLifecycleRegistered";

function isGatewayLifecycleRegistered(): boolean {
  return !!_G[_GATEWAY_LIFECYCLE_KEY];
}

function markGatewayLifecycleRegistered(): void {
  _G[_GATEWAY_LIFECYCLE_KEY] = true;
}

export default {
  id: "dirigent",
  name: "Dirigent",
  register(api: OpenClawPluginApi) {
    const config = normalizeConfig(api);
    const pluginDir = path.dirname(new URL(import.meta.url).pathname);
    const openclawDir = path.join(os.homedir(), ".openclaw");

    const identityRegistry = new IdentityRegistry(config.identityFilePath);
    const channelStore = new ChannelStore(config.channelStoreFilePath);

    let paddedCellDetected = false;

    function hasPaddedCell(): boolean {
      return paddedCellDetected;
    }

    function tryAutoScanPaddedCell(): void {
      const count = scanPaddedCell(identityRegistry, openclawDir, api.logger);
      paddedCellDetected = count >= 0;
      if (paddedCellDetected) {
        api.logger.info(`dirigent: padded-cell detected — ${count} identity entries auto-registered`);
      }
    }

    // ── Gateway lifecycle (once per gateway process) ───────────────────────
    if (!isGatewayLifecycleRegistered()) {
      markGatewayLifecycleRegistered();

      api.on("gateway_start", () => {
        const live = normalizeConfig(api);

        startNoReplyApi(api.logger, pluginDir, live.noReplyPort);

        if (live.moderatorBotToken) {
          startModeratorPresence(live.moderatorBotToken, api.logger);
          api.logger.info("dirigent: moderator bot presence started");
        } else {
          api.logger.info("dirigent: moderatorBotToken not set — moderator features disabled");
        }

        tryAutoScanPaddedCell();
      });

      api.on("gateway_stop", () => {
        stopNoReplyApi(api.logger);
        stopModeratorPresence();
      });
    }

    // ── Hooks (registered on every api instance — event-level dedup handles duplicates) ──
    registerBeforeModelResolveHook({
      api,
      channelStore,
      identityRegistry,
      moderatorBotToken: config.moderatorBotToken || undefined,
      noReplyModel: config.noReplyModel,
      noReplyProvider: config.noReplyProvider,
      scheduleIdentifier: config.scheduleIdentifier,
    });

    const interruptTailMatch = registerAgentEndHook({
      api,
      channelStore,
      identityRegistry,
      moderatorBotToken: config.moderatorBotToken || undefined,
      scheduleIdentifier: config.scheduleIdentifier,
      onDiscussionDormant: async (channelId: string) => {
        const live = normalizeConfig(api);
        if (!live.moderatorBotToken) return;
        const rec = channelStore.getRecord(channelId);
        if (!rec.discussion || rec.discussion.concluded) return;
        const initiatorEntry = identityRegistry.findByAgentId(rec.discussion.initiatorAgentId);
        const mention = initiatorEntry ? `<@${initiatorEntry.discordUserId}>` : rec.discussion.initiatorAgentId;
        await sendModeratorMessage(
          live.moderatorBotToken,
          channelId,
          `${mention} Discussion is idle. Please summarize the results and call \`discussion-complete\`.`,
          api.logger,
        ).catch(() => undefined);
      },
    });

    registerMessageReceivedHook({
      api,
      channelStore,
      identityRegistry,
      moderatorBotToken: config.moderatorBotToken || undefined,
      scheduleIdentifier: config.scheduleIdentifier,
      interruptTailMatch,
    });

    // ── Tools ──────────────────────────────────────────────────────────────
    registerDirigentTools({
      api,
      channelStore,
      identityRegistry,
      moderatorBotToken: config.moderatorBotToken || undefined,
      scheduleIdentifier: config.scheduleIdentifier,
      onDiscussionCreate: async ({ channelId, guildId, initiatorAgentId, callbackGuildId, callbackChannelId, discussionGuide, participants }) => {
        const live = normalizeConfig(api);
        if (!live.moderatorBotToken) return;

        // Post discussion-guide to wake participants
        await sendModeratorMessage(live.moderatorBotToken, channelId, discussionGuide, api.logger)
          .catch(() => undefined);

        // Initialize speaker list
        const agentIds = await fetchVisibleChannelBotAccountIds(api, channelId, identityRegistry);
        const speakers = agentIds
          .map((aid) => {
            const entry = identityRegistry.findByAgentId(aid);
            return entry ? { agentId: aid, discordUserId: entry.discordUserId } : null;
          })
          .filter((s): s is NonNullable<typeof s> => s !== null);

        if (speakers.length > 0) {
          setSpeakerList(channelId, speakers);
          const first = speakers[0];
          await sendAndDelete(
            live.moderatorBotToken,
            channelId,
            `<@${first.discordUserId}>${live.scheduleIdentifier}`,
            api.logger,
          ).catch(() => undefined);
        }
      },
    });

    // ── Commands ───────────────────────────────────────────────────────────
    registerSetChannelModeCommand({ api, channelStore });
    registerAddGuildCommand(api);

    // ── Control page ───────────────────────────────────────────────────────
    registerControlPage({
      api,
      channelStore,
      identityRegistry,
      moderatorBotToken: config.moderatorBotToken || undefined,
      openclawDir,
      hasPaddedCell,
    });

    api.logger.info("dirigent: plugin registered (v2)");
  },
};