/* eslint-disable @typescript-eslint/indent */

import sqlite from 'better-sqlite3'

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

import { dateToInteger } from '@cityssm/expressjs-server-js/dateTimeFns.js'

import * as configFunctions from '../functions.config.js'

import type * as recordTypes from '../../types/recordTypes'
import { getLotNameWhereClause } from '../functions.sqlFilters.js'

interface GetLotsFilters {
  lotNameSearchType?: '' | 'startsWith' | 'endsWith'
  lotName?: string
  mapId?: number | string
  lotTypeId?: number | string
  lotStatusId?: number | string
  occupancyStatus?: '' | 'occupied' | 'unoccupied'
  workOrderId?: number | string
}

interface GetLotsOptions {
  limit: -1 | number
  offset: number
}

function buildWhereClause(filters: GetLotsFilters): {
  sqlWhereClause: string
  sqlParameters: unknown[]
} {
  let sqlWhereClause = ' where l.recordDelete_timeMillis is null'
  const sqlParameters: unknown[] = []

  const lotNameFilters = getLotNameWhereClause(
    filters.lotName,
    filters.lotNameSearchType ?? '',
    'l'
  )
  sqlWhereClause += lotNameFilters.sqlWhereClause
  sqlParameters.push(...lotNameFilters.sqlParameters)

  if ((filters.mapId ?? '') !== '') {
    sqlWhereClause += ' and l.mapId = ?'
    sqlParameters.push(filters.mapId)
  }

  if ((filters.lotTypeId ?? '') !== '') {
    sqlWhereClause += ' and l.lotTypeId = ?'
    sqlParameters.push(filters.lotTypeId)
  }

  if ((filters.lotStatusId ?? '') !== '') {
    sqlWhereClause += ' and l.lotStatusId = ?'
    sqlParameters.push(filters.lotStatusId)
  }

  if ((filters.occupancyStatus ?? '') !== '') {
    if (filters.occupancyStatus === 'occupied') {
      sqlWhereClause += ' and lotOccupancyCount > 0'
    } else if (filters.occupancyStatus === 'unoccupied') {
      sqlWhereClause +=
        ' and (lotOccupancyCount is null or lotOccupancyCount = 0)'
    }
  }

  if ((filters.workOrderId ?? '') !== '') {
    sqlWhereClause +=
      ' and l.lotId in (select lotId from WorkOrderLots where recordDelete_timeMillis is null and workOrderId = ?)'
    sqlParameters.push(filters.workOrderId)
  }

  return {
    sqlWhereClause,
    sqlParameters
  }
}

export function getLots(
  filters: GetLotsFilters,
  options: GetLotsOptions,
  connectedDatabase?: sqlite.Database
): {
  count: number
  lots: recordTypes.Lot[]
} {
  const database =
    connectedDatabase ??
    sqlite(databasePath, {
      readonly: true
    })

  const { sqlWhereClause, sqlParameters } = buildWhereClause(filters)

  const currentDate = dateToInteger(new Date())

  let count = 0

  if (options.limit !== -1) {
    count = database
      .prepare(
        `select count(*) as recordCount
          from Lots l
          left join (
            select lotId, count(lotOccupancyId) as lotOccupancyCount from LotOccupancies
            where recordDelete_timeMillis is null
            and occupancyStartDate <= ${currentDate}
            and (occupancyEndDate is null or occupancyEndDate >= ${currentDate})
            group by lotId
          ) o on l.lotId = o.lotId
          ${sqlWhereClause}`
      )
      .get(sqlParameters).recordCount
  }

  let lots: recordTypes.Lot[] = []

  if (options.limit === -1 || count > 0) {
    database.function(
      'userFn_lotNameSortName',
      configFunctions.getProperty('settings.lot.lotNameSortNameFunction')
    )

    sqlParameters.unshift(currentDate, currentDate)

    lots = database
      .prepare(
        'select l.lotId, l.lotName,' +
          ' t.lotType,' +
          ' l.mapId, m.mapName, l.mapKey,' +
          ' l.lotStatusId, s.lotStatus,' +
          ' ifnull(o.lotOccupancyCount, 0) as lotOccupancyCount' +
          ' from Lots l' +
          ' left join LotTypes t on l.lotTypeId = t.lotTypeId' +
          ' left join LotStatuses s on l.lotStatusId = s.lotStatusId' +
          ' left join Maps m on l.mapId = m.mapId' +
          (' left join (' +
            'select lotId, count(lotOccupancyId) as lotOccupancyCount' +
            ' from LotOccupancies' +
            ' where recordDelete_timeMillis is null' +
            ' and occupancyStartDate <= ?' +
            ' and (occupancyEndDate is null or occupancyEndDate >= ?)' +
            ' group by lotId' +
            ') o on l.lotId = o.lotId') +
          sqlWhereClause +
          ' order by userFn_lotNameSortName(l.lotName), l.lotId' +
          (options ? ` limit ${options.limit} offset ${options.offset}` : '')
      )
      .all(sqlParameters)

    if (options.limit === -1) {
      count = lots.length
    }
  }

  if (connectedDatabase === undefined) {
    database.close()
  }

  return {
    count,
    lots
  }
}

export default getLots