import { Product } from 'ssn';
import * as database from './database';
import products from './products';
import writeLog from '../logger/writeLog';
import createStatement from './createStatement';

export async function init() {
  await database.init();

  //Only create table if it does not exist yet
  const createIfNotExists = createStatement.replace(/^CREATE TABLE/, 'CREATE TABLE IF NOT EXISTS');
  await database.query(createIfNotExists);

  /**Products that are missing from the database and need to be inserted. */
  const missingProducts: Product[] = [];
  /** Products inside the database table that are not valid products. Will be printed to error log and ignored */
  const erroneousProducts: Product[] = [];

  const { results: existingRows } = await database.query('SELECT * FROM ssn_versions');
  console.log(existingRows);
  return;

  existingRows.forEach((row: any) => {
    //TODO: match with products
  });

  //If row does not exist, INSERT into table
  await Promise.all(missingProducts.map((product) => {
    return database.query(`INSERT INTO ssn_versions ${product}`);
  }));

  //If row exists that is not in products, ignore it and output error
  erroneousProducts.forEach((product) => {
    writeLog(`Product ${product} in database table is invalid.`);
  });

  //TODO: insert products

}