import sqlite from "better-sqlite3";

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

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

export function getNextWorkOrderNumber(connectedDatabase?: sqlite.Database): string {
    const database =
        connectedDatabase ||
        sqlite(databasePath, {
            readonly: true
        });

    const paddingLength = configFunctions.getProperty("settings.workOrders.workOrderNumberLength");
    const currentYearString = new Date().getFullYear().toString();

    const regex = new RegExp("^" + currentYearString + "-\\d+$");

    database.function("userFn_matchesWorkOrderNumberSyntax", (workOrderNumber: string) => {
        return regex.test(workOrderNumber) ? 1 : 0;
    });

    const workOrderNumberRecord = database
        .prepare(
            "select workOrderNumber from WorkOrders" +
                " where userFn_matchesWorkOrderNumberSyntax(workOrderNumber) = 1" +
                " order by cast(substr(workOrderNumber, instr(workOrderNumber, '-') + 1) as integer) desc"
        )
        .get();

    if (!connectedDatabase) {
        database.close();
    }

    let workOrderNumberIndex = 0;

    if (workOrderNumberRecord) {
        workOrderNumberIndex = Number.parseInt(
            workOrderNumberRecord.workOrderNumber.split("-")[1],
            10
        );
    }

    workOrderNumberIndex += 1;

    return currentYearString + "-" + workOrderNumberIndex.toString().padStart(paddingLength, "0");
}

export default getNextWorkOrderNumber;