import sqlite from "better-sqlite3";

import {
    lotOccupancyDB as databasePath
} from "../../data/databasePaths.js";

import * as configFunctions from "../functions.config.js";


export const getPreviousLotId = (lotId: number | string): number => {

    const database = sqlite(databasePath, {
        readonly: true
    });

    database.function("userFn_lotNameSortName", configFunctions.getProperty("settings.lot.lotNameSortNameFunction"));

    const result: {
            lotId: number
        } = database
        .prepare("select lotId from Lots" +
            " where recordDelete_timeMillis is null" +
            " and userFn_lotNameSortName(lotName) < (select userFn_lotNameSortName(lotName) from Lots where lotId = ?)" +
            " order by userFn_lotNameSortName(lotName) desc" +
            " limit 1")
        .get(lotId);

    database.close();

    if (result) {
        return result.lotId;
    }

    return undefined;
};


export default getPreviousLotId;