const generateId = require('../../utils/generateId.util');
const { domain } = require('../../config').server;
const whatsappEvents = require('../emitter');
const { callWebhook } = require('../webhook');
const { addConnection, updateConnection, addCurrentConnection, resetConnection } = require('../../services/connections.service');
const { objectMapper } = require('../../utils/commons.util');
const { sessionService } = require('..');

const logger = console;

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',
};
const timeField = { sent: 'sendTime', delivered: 'deliverTime', read: 'readTime' };
const directionField = { 'message:received': 'inbound', 'message:updated': 'outbound' };
const webhookBodyBuilder = (messageData, messageType) => {
  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
    waiMessage: {
      ...messageData,
      ...(messageData.updateTime ? { [timeField[messageData.status]]: messageData.updateTime } : {}),
      wamid: messageData.id,
      direction: directionField[messageType],
      externalId: '-1', // todo:
    },
  };
  return message;
};

const setupConnectionHandler = () => {
  // connectionEventNames.forEach(eventName => {
  logger.info(`Setting up event ${'connection:connect'}`);
  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' }),
        service_type: 'baileys',
        status: 'connecting',
      });
    } catch (error) {
      logger.error({ connectionData, error }, 'error add connection');
    }
  });
  logger.info(`Setting up event ${'connection:open'}`);
  whatsappEvents.on('connection:open', async connectionData => {
    logger.info(`event ${'connection:open'}`, connectionData);
    try {
      await updateConnection(
        {
          ...objectMapper(connectionData, { whatsAppNo: [{ key: 'wa_id' }, { key: 'sesson_id' }], channelId: 'channel_id' }),
          service_type: 'baileys',
        },
        { connect_domain: domain },
      );
    } catch (error) {
      logger.error({ connectionData, error }, 'error add connection');
    }
  });
  logger.info(`Setting up event ${'connection:close'}`);
  whatsappEvents.on('connection:close', async connectionData => {
    try {
      sessionService.removeSession(connectionData.sesson_id);
      await updateConnection({
        ...objectMapper(connectionData, { whatsAppNo: [{ key: 'wa_id' }, { key: 'sesson_id' }], channelId: 'channel_id' }),
        service_type: 'baileys',
      });
      // todo: 通知前端: 重新扫码
    } catch (error) {
      logger.error({ connectionData, error }, 'error add connection');
    }
  });
  // });
};

const setupMessageHandler = () => {
  messageEventNames.forEach(eventName => {
    logger.info(`Setting up event ${eventName}`);
    whatsappEvents.on(eventName, async messageData => {
      try {
        const x = webhookBodyBuilder(messageData, eventName);
        await callWebhook(x);
      } catch (error) {
        logger.error({ messageData, error }, 'error call webhook');
      }
    });
  });
};

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

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

module.exports = { setupWhatsappHandler, resetCurrentConnection };