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 { startSideCar, stopSideCar } from "./core/sidecar-process.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 { registerDirigentApi } from "./web/dirigent-api.js";
import { sendModeratorMessage, sendScheduleTrigger, getBotUserIdFromToken } from "./core/moderator-discord.js";
import { setSpeakerList, isCurrentSpeaker, isDormant, wakeFromDormant } from "./turn-manager.js";
import { fetchVisibleChannelBotAccountIds } from "./core/channel-members.js";

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

function normalizeConfig(api: OpenClawPluginApi): Required<PluginConfig> {
  const cfg = (api.pluginConfig ?? {}) as PluginConfig;
  return {
    moderatorBotToken: cfg.moderatorBotToken ?? "",
    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"),
    debugMode: cfg.debugMode ?? false,
    noReplyProvider: cfg.noReplyProvider ?? "dirigent",
    noReplyModel: cfg.noReplyModel ?? "no-reply",
    sideCarPort: cfg.sideCarPort ?? 8787,
  };
}

function getGatewayPort(api: OpenClawPluginApi): number {
  try {
    return ((api.config as Record<string, unknown>)?.gateway as Record<string, unknown>)?.port as number ?? 18789;
  } catch {
    return 18789;
  }
}

/**
 * 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);

    const moderatorBotToken = config.moderatorBotToken || undefined;
    const moderatorBotUserId = moderatorBotToken ? getBotUserIdFromToken(moderatorBotToken) : undefined;
    const moderatorServiceUrl = `http://127.0.0.1:${config.sideCarPort}/moderator`;

    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();

      const gatewayPort = getGatewayPort(api);

      // Start unified services (no-reply API + moderator bot)
      startSideCar(
        api.logger,
        pluginDir,
        config.sideCarPort,
        moderatorBotToken,
        undefined, // pluginApiToken — gateway handles auth for plugin routes
        gatewayPort,
        config.debugMode,
      );

      if (!moderatorBotToken) {
        api.logger.info("dirigent: moderatorBotToken not set — moderator features disabled");
      }

      tryAutoScanPaddedCell();

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

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

    const interruptTailMatch = registerAgentEndHook({
      api,
      channelStore,
      identityRegistry,
      moderatorBotToken,
      scheduleIdentifier: config.scheduleIdentifier,
      debugMode: config.debugMode,
      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);
      },
    });

    // Speaker-list init still handled via message_received (needs OpenClaw API for channel member lookup)
    registerMessageReceivedHook({
      api,
      channelStore,
      identityRegistry,
      moderatorBotToken,
      scheduleIdentifier: config.scheduleIdentifier,
      interruptTailMatch,
      debugMode: config.debugMode,
      // When moderator service is active it handles wake/interrupt via HTTP callback;
      // message_received only needs to run speaker-list initialization.
      moderatorHandlesMessages: !!moderatorBotToken,
    });

    // ── Dirigent API (moderator service → plugin callbacks) ───────────────
    registerDirigentApi({
      api,
      channelStore,
      moderatorBotUserId,
      scheduleIdentifier: config.scheduleIdentifier,
      moderatorServiceUrl,
      moderatorServiceToken: undefined,
      debugMode: config.debugMode,
      onNewMessage: async ({ channelId, senderId }) => {
        const mode = channelStore.getMode(channelId);

        // Modes where agents don't participate
        if (mode === "none" || mode === "work" || mode === "report") return;

        // Skip messages from the moderator bot itself (schedule triggers, etc.)
        if (senderId === moderatorBotUserId) return;

        // Concluded discussion: send "closed" reply via moderator service
        if (mode === "discussion") {
          const rec = channelStore.getRecord(channelId);
          if (rec.discussion?.concluded && moderatorBotToken) {
            await sendModeratorMessage(
              moderatorBotToken,
              channelId,
              "This discussion is closed and no longer active.",
              api.logger,
            ).catch(() => undefined);
            return;
          }
        }

        // Identify sender — is it the current speaker?
        const senderEntry = identityRegistry.findByDiscordUserId(senderId);
        const currentSpeakerIsThisSender = senderEntry
          ? isCurrentSpeaker(channelId, senderEntry.agentId)
          : false;

        if (!currentSpeakerIsThisSender) {
          // Non-current-speaker: interrupt any ongoing tail-match poll
          interruptTailMatch(channelId);
          api.logger.info(`dirigent: moderator-callback interrupt tail-match channel=${channelId} senderId=${senderId}`);

          // Wake from dormant if needed
          if (isDormant(channelId) && moderatorBotToken) {
            const first = wakeFromDormant(channelId);
            if (first) {
              const msg = `<@${first.discordUserId}>${config.scheduleIdentifier}`;
              await sendScheduleTrigger(moderatorBotToken, channelId, msg, api.logger, config.debugMode);
              api.logger.info(`dirigent: moderator-callback woke dormant channel=${channelId} first=${first.agentId}`);
            }
          }
        }
      },
    });

    // ── Tools ──────────────────────────────────────────────────────────────
    registerDirigentTools({
      api,
      channelStore,
      identityRegistry,
      moderatorBotToken,
      scheduleIdentifier: config.scheduleIdentifier,
      onDiscussionCreate: async ({ channelId, 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 sendScheduleTrigger(
            live.moderatorBotToken,
            channelId,
            `<@${first.discordUserId}>${live.scheduleIdentifier}`,
            api.logger,
            live.debugMode,
          ).catch(() => undefined);
        }
      },
    });

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

    // ── Control page ───────────────────────────────────────────────────────
    registerControlPage({
      api,
      channelStore,
      identityRegistry,
      moderatorBotToken,
      openclawDir,
      hasPaddedCell,
    });

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