const log = require('j7/log');
const bcutils = require('j7/bcutils');
const utils = require('j7/utils');

class NftTransferProcess extends BaseService {

  async start(instance, conn, event) {
    const {err, row} = await conn.ormSelectOne(
      't_nft_transfer',
      [
        ['txhash', event['transactionHash']],
        ['log_index', event['logIndex']],
      ]
    );
    if (err) {
      this.throwError(instance, err);
    }
    if (!row) {
      const returnValues = event['returnValues'];
      const {err} = await conn.insert(
        't_nft_transfer',
        [
          ['token_id', returnValues['tokenId']],
          ['txhash', event['transactionHash']],
          ['block_number', event['blockNumber']],
          ['log_index', event['logIndex']],
          ['_from', bcutils.toNormalAddress(returnValues['from'])],
          ['_to', bcutils.toNormalAddress(returnValues['to'])],
          ['raw_data', utils.jsonEncode(event)],
          ['createtime', utils.getUtcTime()],
          ['modifytime', utils.getUtcTime()],
        ]
      );
      if (err) {
        this.throwError(instance, err);
      }
    }
  };

  throwError(instance, err) {
    const errMsg = 'processNftTransferEvent:' + utils.jsonEncode(instance) + ' err:' + err;
    throw errMsg;
  }

}

module.exports = NftTransferProcess;