'use strict';

const generateId = require('../../utils/generateId.util');
const { domain, name: domainName } = require('../../config').server;
const whatsappEvents = require('../emitter');
const { callWebhook } = require('../webhook');
const { addConnection, updateConnection, addCurrentConnection, resetConnection } = require('../../services/connections.service');
const { objectMapper, pick } = require('../../utils/commons.util');
const { sessionStore } = require('..');
const { getOutboundMessage, upsertOutboundMessage } = require('../../services/outbound_messages.service');

const logger = require('../../utils/logger.util');
const { DbData,  } = require('../../helper/wai.msg.helper');

const connectionEventNames = ['connection:connect', 'connection:open', 'connection:close'];
const messageEventNames = ['message:received', 'message:updated'];

const eventTypeMapped = {
  'message:received': 'wai.message.received',
  'message:updated': 'wai.message.updated',
  'creds:update': 'wai.creds.update',
};
const timeField = { saved: 'createTime', pending: 'createTime', sent: 'sendTime', delivered: 'deliverTime', read: 'readTime', failed: 'updateTime' };
const statusMapped = { saved: 'accepted', pending: 'accepted', sent: 'sent', delivered: 'delivered', read: 'read', failed: 'failed' };
const directionField = { 'message:received': 'inbound', 'message:updated': 'outbound' };
const directionPrefix = { inbound: 'in_', outbound: 'out_' };

/**
 * @returns {Object} webhookBody
 */
const webhookBodyBuilder = (messageData, messageType) => {
  const defaultContent = { id: '', from: '', to: '', externalId: '', type: '', direction: '', status: '', };
  const message = {
    id: `evt_${generateId().replace(/-/g, '')}`,
    type: eventTypeMapped[messageType],
    apiVersion: 'v2',
    webhooksource: 'wai',
    createTime: new Date(new Date().getTime() + 8 * 60 * 60 * 1000).toISOString(), // GMT +8
    domainName,
    conversationid: messageData?.externalId || '',
    whatsAppNo: messageData?.whatsAppNo || '',
    waiMessage: {
      ...defaultContent,
      ...messageData,
      ...(messageData.updateTime ? { [timeField[messageData.status]]: messageData.updateTime } : {}),
      id: messageData.id && messageData.direction ? `${directionPrefix[messageData.direction]}${messageData.id}` : (messageData.id || generateId()),
      wamid: messageData.id || '',
      // direction: directionField[messageType],
      status: statusMapped?.[messageData.status] || messageData.status || '',
      externalId: messageData?.externalId || '',
    },
  };
  return message;
};

const webhookBodyFill = (webhookBody, messageData) => {
  const DBDataObj = DbData(messageData);
  Object.assign(webhookBody.waiMessage, DBDataObj);
  return webhookBody;
};

/**
 * WhatsApp 连接事件
 */
const setupConnectionHandler = () => {
  // connectionEventNames.forEach(eventName => {
  whatsappEvents.on('connection:connect', async connectionData => {
    try {
      // find Or create
      await addCurrentConnection({
        ...objectMapper(connectionData, { phone: [{ key: 'wa_id' }, { key: 'sesson_id' }], channelId: 'channel_id', createTimestamp: 'createtime', version: 'version' }, false),
        service_type: 'baileys',
        status: 'connecting',
      });
    } catch (error) {
      logger.error({ connectionData, error }, 'error add connection');
    }
  });
  whatsappEvents.on('connection:open', async connectionData => {
    logger.info(`event ${'connection:open'}`, connectionData);
    // todo: 更新实例
    try {
      await updateConnection(
        {
          ...objectMapper(connectionData, { whatsAppNo: [{ key: 'wa_id' }, { key: 'sesson_id' }], channelId: 'channel_id' }),
          service_type: 'baileys',
          closetime: null,
        },
        { connect_domain: domain, connect_name: domainName },
      );
      const webhookBody = webhookBodyBuilder({ ...connectionData, to: connectionData.whatsAppNo, connection: 'open' }, 'creds:update');
      await callWebhook(webhookBody);
    } catch (error) {
      logger.error({ connectionData, error }, 'error add connection');
    }
  });
  whatsappEvents.on('connection:close', async connectionData => {
    logger.info(`event ${'connection:close'}`, connectionData);
    try {
      sessionStore.removeSession(connectionData.channelId);
      await updateConnection(
        {
          ...objectMapper(connectionData, { whatsAppNo: [{ key: 'wa_id' }, { key: 'sesson_id' }], channelId: 'channel_id' }),
          service_type: 'baileys',
        },
        { connect_domain: domain, connect_name: domainName, channel_id: connectionData.channelId },
      );
      // todo: 通知前端: 重新扫码
      const webhookBody = webhookBodyBuilder({ ...connectionData, to: connectionData.whatsAppNo, connection: 'offline' }, 'creds:update');
      await callWebhook(webhookBody);
    } catch (error) {
      logger.error({ connectionData, error }, 'error add connection');
    }
  });
  // });
};

/**
 * 监听 Creds 更新事件
 */
const setupCredsHandler = () => {
  whatsappEvents.on('creds:update', async creds => {
    logger.info('creds:update', creds);
    try {
      const webhookBody = webhookBodyBuilder({ ...creds, to: creds.whatsAppNo, connection: '' }, 'creds:update');
      await callWebhook(webhookBody);
    } catch (error) {
      logger.error({ creds, error }, 'error update creds');
    }
  });
};

/**
 * WhatsApp 消息事件
 *  pending ⏰ -> saved ⏰ -> sent(*) ✔ -> delivered ✔✔ -> read ✅
 *  saved -> pending -> sent(*) -> delivered -> read
 */
const setupMessageHandler = () => {
  messageEventNames.forEach(eventName => {
    whatsappEvents.on(eventName, async messageData => {
      // if (messageData.status === 'pending') {
      //   logger.info('message pending', messageData);
      //   return false;
      // }
      try {
        const now = new Date(new Date().getTime() + 60 * 60 * 1000).toISOString();

        const savedId = `${directionPrefix[messageData.direction]}${messageData.id}`;
        const targetUpsert = messageData.externalId ? { actionId: messageData.externalId } : { id: savedId };
        const savedMsg = await getOutboundMessage(targetUpsert);
        const bixFields = pick(savedMsg, ['actionId', 'externalId']);
        logger.info('message evt\n', eventName, messageData, savedMsg);
        const typeField = { msgtype: messageData?.type || savedMsg?.msgtype || 'text' }; // fix: type 空

        const webhookBody = webhookBodyBuilder({ ...messageData, ...bixFields, ...typeField }, eventName);
        const { waiMessage } = webhookBody;

        const timeFields = pick(waiMessage, [...Object.values(timeField), 'createTime', 'updateTime']);
        const upsertFields = pick(waiMessage, ['direction', 'wamid', 'id', 'status']);
        upsertFields.evt_id = webhookBody.id;
        const pusher = { customerProfile_id: waiMessage.customerProfile?.id || '', customerProfile_name: waiMessage.customerProfile?.name || '' };
        const record = objectMapper(waiMessage, { from: 'from', to: 'to', status: 'msg_status', type: 'msgtype' }, false);
        const contentFields = waiMessage.type === 'text' ? { text_body: waiMessage.text.body } : {};
        // const contentFieldsToDB =
        // todo: 现在只能收text 消息, 后续再加其他类型

        const msgRow = await upsertOutboundMessage(
          { ...timeFields, ...upsertFields, ...pusher, ...contentFields, ...record, ...typeField, message_origin: savedMsg?.message_origin || JSON.stringify(messageData) },
          targetUpsert,
        );
        // console.log('upsert=========================', upsert);
        // todo: 把内容加上, 否则前端没显示
        await callWebhook(webhookBodyFill(webhookBody, msgRow));
      } catch (error) {
        logger.error({ messageData, error }, 'error call webhook');
      }
    });
  });
};

function setupWhatsappHandler() {
  setupConnectionHandler();
  setupCredsHandler();
  setupMessageHandler();
}

/**
 * 登出: 当前服务的所有连接
 */
async function resetCurrentConnection() {
  await resetConnection();
}

module.exports = { setupWhatsappHandler, resetCurrentConnection };