/* eslint-disable @typescript-eslint/indent */
import sqlite from 'better-sqlite3'

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

import {
  dateIntegerToString,
  dateStringToInteger
} from '@cityssm/expressjs-server-js/dateTimeFns.js'

import { getWorkOrderComments } from './getWorkOrderComments.js'
import { getLots } from './getLots.js'
import { getLotOccupancies } from './getLotOccupancies.js'
import { getWorkOrderMilestones } from './getWorkOrderMilestones.js'

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

interface GetWorkOrdersFilters {
  workOrderTypeId?: number | string
  workOrderOpenStatus?: '' | 'open' | 'closed'
  workOrderOpenDateString?: string
  occupantName?: string
  lotName?: string
  lotOccupancyId?: number | string
}

interface GetWorkOrdersOptions {
  limit: number
  offset: number
  includeLotsAndLotOccupancies?: boolean
  includeComments?: boolean
  includeMilestones?: boolean
}

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

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

  if ((filters.workOrderOpenStatus ?? '') !== '') {
    if (filters.workOrderOpenStatus === 'open') {
      sqlWhereClause += ' and w.workOrderCloseDate is null'
    } else if (filters.workOrderOpenStatus === 'closed') {
      sqlWhereClause += ' and w.workOrderCloseDate is not null'
    }
  }

  if ((filters.workOrderOpenDateString ?? '') !== '') {
    sqlWhereClause += ' and w.workOrderOpenDate = ?'
    sqlParameters.push(dateStringToInteger(filters.workOrderOpenDateString!))
  }

  const occupantNameFilters = getOccupantNameWhereClause(
    filters.occupantName,
    'o'
  )
  if (occupantNameFilters.sqlParameters.length > 0) {
    sqlWhereClause +=
      ' and w.workOrderId in (' +
      'select workOrderId from WorkOrderLotOccupancies o' +
      ' where recordDelete_timeMillis is null' +
      ' and o.lotOccupancyId in (select lotOccupancyId from LotOccupancyOccupants o where recordDelete_timeMillis is null' +
      occupantNameFilters.sqlWhereClause +
      ')' +
      ')'
    sqlParameters.push(...occupantNameFilters.sqlParameters)
  }

  const lotNameFilters = getLotNameWhereClause(filters.lotName, '', 'l')
  if (lotNameFilters.sqlParameters.length > 0) {
    sqlWhereClause +=
      ' and w.workOrderId in (' +
      'select workOrderId from WorkOrderLots where recordDelete_timeMillis is null and lotId in (select lotId from Lots l where recordDelete_timeMillis is null' +
      lotNameFilters.sqlWhereClause +
      '))'
    sqlParameters.push(...lotNameFilters.sqlParameters)
  }

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

  return {
    sqlWhereClause,
    sqlParameters
  }
}

export function getWorkOrders(
  filters: GetWorkOrdersFilters,
  options?: GetWorkOrdersOptions,
  connectedDatabase?: sqlite.Database
): {
  count: number
  workOrders: recordTypes.WorkOrder[]
} {
  const database =
    connectedDatabase ??
    sqlite(databasePath, {
      readonly: true
    })

  database.function('userFn_dateIntegerToString', dateIntegerToString)

  const { sqlWhereClause, sqlParameters } = buildWhereClause(filters)

  const count: number = database
    .prepare(
      'select count(*) as recordCount from WorkOrders w' + sqlWhereClause
    )
    .get(sqlParameters).recordCount

  let workOrders: recordTypes.WorkOrder[] = []

  if (count > 0) {
    workOrders = database
      .prepare(
        'select w.workOrderId,' +
          ' w.workOrderTypeId, t.workOrderType,' +
          ' w.workOrderNumber, w.workOrderDescription,' +
          ' w.workOrderOpenDate, userFn_dateIntegerToString(w.workOrderOpenDate) as workOrderOpenDateString,' +
          ' w.workOrderCloseDate, userFn_dateIntegerToString(w.workOrderCloseDate) as workOrderCloseDateString,' +
          ' ifnull(m.workOrderMilestoneCount, 0) as workOrderMilestoneCount,' +
          ' ifnull(m.workOrderMilestoneCompletionCount, 0) as workOrderMilestoneCompletionCount' +
          ' from WorkOrders w' +
          ' left join WorkOrderTypes t on w.workOrderTypeId = t.workOrderTypeId' +
          (' left join (select workOrderId,' +
            ' count(workOrderMilestoneId) as workOrderMilestoneCount,' +
            ' sum(case when workOrderMilestoneCompletionDate is null then 0 else 1 end) as workOrderMilestoneCompletionCount' +
            ' from WorkOrderMilestones' +
            ' where recordDelete_timeMillis is null' +
            ' group by workOrderId) m on w.workOrderId = m.workOrderId') +
          sqlWhereClause +
          ' order by w.workOrderOpenDate desc, w.workOrderNumber desc' +
          (options
            ? ` limit ${options.limit} offset ${options.offset}`
            : '')
      )
      .all(sqlParameters)
  }

  if (
    options &&
    (options.includeComments ||
      options.includeLotsAndLotOccupancies ||
      options.includeMilestones)
  ) {
    for (const workOrder of workOrders) {
      if (options.includeComments) {
        workOrder.workOrderComments = getWorkOrderComments(
          workOrder.workOrderId as number,
          database
        )
      }

      if (options.includeLotsAndLotOccupancies) {
        workOrder.workOrderLots = getLots(
          {
            workOrderId: workOrder.workOrderId
          },
          {
            limit: -1,
            offset: 0
          },
          database
        ).lots

        workOrder.workOrderLotOccupancies = getLotOccupancies(
          {
            workOrderId: workOrder.workOrderId
          },
          {
            limit: -1,
            offset: 0,
            includeOccupants: true
          },
          database
        ).lotOccupancies
      }

      if (options.includeMilestones) {
        workOrder.workOrderMilestones = getWorkOrderMilestones(
          {
            workOrderId: workOrder.workOrderId
          },
          {
            orderBy: 'date'
          },
          database
        )
      }
    }
  }

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

  return {
    count,
    workOrders
  }
}

export default getWorkOrders