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