/**
 * PIT Channel 主文�? * @module channel
 */

import type { 
  ChannelPlugin,
  ChannelMeta,
  ChannelCapabilities,
  ChannelMessagingAdapter,
  ChannelConfigAdapter,
  ChannelOutboundAdapter,
  ChannelGatewayAdapter,
  ChannelStatusAdapter,
  OpenClawConfig,
} from "openclaw/plugin-sdk";

import type { 
  ResolvedPITBotAccount, 
  PITUserMessage,
  PITConnectionState
} from "./types.js";
import type { Gateway } from "./gateway.js";
import { 
  DEFAULT_ACCOUNT_ID, 
  listPITBotAccountIds, 
  resolvePITBotAccount, 
  applyPITBotAccountConfig,
  validateConfig,
} from "./config.js";
import { startGateway } from "./gateway.js";
import { chunkText } from "./utils/chunker.js";
import { createLogger } from "./utils/logger.js";
import { registerWebUIRoutes } from "./webui/routes.js";

const MODULE = "zhidui-channel";

// Gateway 实例映射
const gateways = new Map<string, Gateway>();

/**
 * PIT Bot Channel Plugin
 */
export const pitBotPlugin: ChannelPlugin<ResolvedPITBotAccount> = {
  id: "zhidui-channel",

  meta: {
    id: "zhidui-channel",
    label: "PIT Bot",
    selectionLabel: "PIT Bot",
    docsPath: "/docs/channels/pit-bot",
    blurb: "Connect to PIT Router for multi-agent support",
    order: 60,
  } as ChannelMeta,

  capabilities: {
    chatTypes: ["direct"],
    media: true,
    reactions: false,
    threads: false,
    blockStreaming: false,
  } as ChannelCapabilities,

  reload: { configPrefixes: ["channels.pit-bot"] },

  messaging: {
    normalizeTarget: (target: string) => {
      const normalized = target.replace(/^pit-bot:/i, "");
      if (normalized.startsWith("user:")) {
        return { ok: true, to: normalized };
      }
      return { ok: true, to: `user:${normalized}` };
    },

    targetResolver: {
      looksLikeId: (id: string) => {
        const normalized = id.replace(/^pit-bot:/i, "");
        return normalized.startsWith("user:") || normalized.length > 0;
      },
      hint: "user:<userId> or <userId>",
    },
  } as ChannelMessagingAdapter,

  config: {
    listAccountIds: (cfg: OpenClawConfig) => listPITBotAccountIds(cfg),
    resolveAccount: (cfg: OpenClawConfig, accountId: string) => resolvePITBotAccount(cfg, accountId),
    defaultAccountId: () => DEFAULT_ACCOUNT_ID,

    applyAccountName: (cfg: OpenClawConfig, accountId: string, name: string) => {
      applyPITBotAccountConfig(cfg, accountId, { name });
    },

    deleteAccount: (cfg: OpenClawConfig, accountId: string) => {
      const accounts = cfg.getSection<Record<string, unknown>>("channels.pit-bot.accounts");
      if (accounts && accountId in accounts) {
        delete accounts[accountId];
        cfg.set("channels.pit-bot.accounts", accounts);
      }
    },

    setAccountEnabled: (cfg: OpenClawConfig, accountId: string, enabled: boolean) => {
      applyPITBotAccountConfig(cfg, accountId, { enabled });
    },

    validateAccountConfig: (cfg: OpenClawConfig, accountId: string) => {
      const account = resolvePITBotAccount(cfg, accountId);
      return validateConfig(account.config);
    },
  } as ChannelConfigAdapter<ResolvedPITBotAccount>,

  outbound: {
    deliveryMode: "direct",
    chunker: chunkText,
    chunkerMode: "markdown",
    textChunkLimit: 4000,

    sendText: async ({ to, text, accountId, replyToId }: { to: string; text: string; accountId: string; replyToId?: string }): Promise<{ channel: string; messageId: string; error?: Error }> => {
      const log = createLogger(`${MODULE}:outbound`);
      
      try {
        const gateway = gateways.get(accountId);
        if (!gateway) {
          return {
            channel: "zhidui-channel",
            messageId: "",
            error: new Error(`Gateway not available for account ${accountId}`),
          };
        }

        const result = await gateway.sendText(to, text, replyToId);
        
        return {
          channel: "zhidui-channel",
          messageId: result.messageId ?? "",
          error: result.error ? new Error(result.error) : undefined,
        };
      } catch (error) {
        const message = error instanceof Error ? error.message : String(error);
        log.error("sendText failed", { to, accountId, error: message });
        return {
          channel: "zhidui-channel",
          messageId: "",
          error: new Error(message),
        };
      }
    },

    sendMedia: async ({ to, text, mediaUrl, accountId, replyToId }: { to: string; text?: string; mediaUrl: string; accountId: string; replyToId?: string }): Promise<{ channel: string; messageId: string; error?: Error }> => {
      const log = createLogger(`${MODULE}:outbound`);
      
      try {
        const gateway = gateways.get(accountId);
        if (!gateway) {
          return {
            channel: "zhidui-channel",
            messageId: "",
            error: new Error(`Gateway not available for account ${accountId}`),
          };
        }

        const result = await gateway.sendMedia(to, mediaUrl ?? "", text, replyToId);
        
        return {
          channel: "zhidui-channel",
          messageId: result.messageId ?? "",
          error: result.error ? new Error(result.error) : undefined,
        };
      } catch (error) {
        const message = error instanceof Error ? error.message : String(error);
        log.error("sendMedia failed", { to, accountId, error: message });
        return {
          channel: "zhidui-channel",
          messageId: "",
          error: new Error(message),
        };
      }
    },
  } as ChannelOutboundAdapter<ResolvedPITBotAccount>,

  gateway: {
    startAccount: async (ctx: {
      account: ResolvedPITBotAccount;
      abortSignal?: AbortSignal;
      cfg: OpenClawConfig;
      log?: { info: (msg: string) => void; error: (msg: string) => void };
      setStatus: (state: Partial<PITConnectionState>) => void;
      getStatus: () => PITConnectionState;
      emitMessage: (msg: unknown) => void;
    }) => {
      const { account, abortSignal, cfg } = ctx;
      const log = createLogger(`${MODULE}:${account.accountId}`);
      
      log.info("Starting gateway");

      try {
        const gateway = await startGateway({
          account,
          abortSignal,
          cfg,
          log,
          setStatus: (state) => {
            const current = ctx.getStatus();
            ctx.setStatus({ ...current, ...state });
          },
          getStatus: () => ctx.getStatus(),
          onMessage: (message: PITUserMessage) => {
            ctx.emitMessage({
              channel: "zhidui-channel",
              accountId: account.accountId,
              chatId: `pit-bot:user:${message.userId}`,
              chatType: "direct",
              senderId: message.userId,
              text: message.content,
              attachments: message.attachments?.map(a => ({
                type: a.type,
                url: a.url,
                filename: a.filename,
                size: a.size,
              })),
              replyToId: message.replyTo,
              metadata: {
                sessionId: message.sessionId,
                timestamp: message.timestamp,
              },
            });
          },
        });

        gateways.set(account.accountId, gateway);

        ctx.setStatus({
          ...ctx.getStatus(),
          running: true,
          connected: true,
        });

        log.info("Gateway started successfully");
      } catch (error) {
        const message = error instanceof Error ? error.message : String(error);
        log.error("Failed to start gateway", { error: message });
        ctx.setStatus({
          ...ctx.getStatus(),
          running: false,
          connected: false,
          lastError: message,
        });
        throw error;
      }
    },

    stopAccount: async (ctx: { account: ResolvedPITBotAccount }) => {
      const { account } = ctx;
      const log = createLogger(`${MODULE}:${account.accountId}`);
      
      log.info("Stopping gateway");

      const gateway = gateways.get(account.accountId);
      if (gateway) {
        gateway.disconnect();
        gateways.delete(account.accountId);
      }

      log.info("Gateway stopped");
    },

    restartAccount: async (ctx: {
      account: ResolvedPITBotAccount;
      abortSignal?: AbortSignal;
      cfg: OpenClawConfig;
      setStatus: (state: Partial<PITConnectionState>) => void;
      getStatus: () => PITConnectionState;
      emitMessage: (msg: unknown) => void;
    }) => {
      const { account } = ctx;
      const log = createLogger(`${MODULE}:${account.accountId}`);
      
      log.info("Restarting gateway");

      const gateway = gateways.get(account.accountId);
      if (gateway) {
        gateway.disconnect();
        gateways.delete(account.accountId);
      }

      await pitBotPlugin.gateway!.startAccount!(ctx as never);
    },
  } as ChannelGatewayAdapter<ResolvedPITBotAccount>,

  status: {
    defaultRuntime: {
      accountId: DEFAULT_ACCOUNT_ID,
      running: false,
      connected: false,
    },

    formatStatus: (runtime: PITConnectionState) => {
      const parts: string[] = [];

      parts.push(runtime.connected ? "🟢 Connected" : "🔴 Disconnected");
      
      if (runtime.sessionId) {
        parts.push(`Session: ${runtime.sessionId.slice(0, 8)}...`);
      }
      
      if (runtime.lastError) {
        parts.push(`Error: ${runtime.lastError}`);
      }

      return parts.join(" | ");
    },
  } as ChannelStatusAdapter,

  // 初始化钩�?  init: async (api: unknown) => {
    const log = createLogger(MODULE);
    log.info("PIT Bot plugin initializing");

    registerWebUIRoutes(api as never);

    log.info("PIT Bot plugin initialized");
  },

  // 清理钩子
  cleanup: async () => {
    const log = createLogger(MODULE);
    log.info("PIT Bot plugin cleaning up");

    for (const [accountId, gateway] of gateways.entries()) {
      log.info(`Disconnecting gateway: ${accountId}`);
      gateway.disconnect();
    }
    gateways.clear();

    log.info("PIT Bot plugin cleaned up");
  },
};

export default pitBotPlugin;