import path from 'node:path'

import { convertHTMLToPDF } from '@cityssm/pdf-puppeteer'
import * as dateTimeFunctions from '@cityssm/utils-datetime'
import camelcase from 'camelcase'
import * as ejs from 'ejs'
import type { NextFunction, Request, Response } from 'express'

import * as configFunctions from '../../helpers/functions.config.js'
import * as lotOccupancyFunctions from '../../helpers/functions.lotOccupancy.js'
import {
  getPdfPrintConfig,
  getReportData
} from '../../helpers/functions.print.js'

const attachmentOrInline = configFunctions.getConfigProperty(
  'settings.printPdf.contentDisposition'
)

export async function handler(
  request: Request,
  response: Response,
  next: NextFunction
): Promise<void> {
  const printName = request.params.printName

  if (
    !configFunctions
      .getConfigProperty('settings.lotOccupancy.prints')
      .includes(`pdf/${printName}`) &&
    !configFunctions
      .getConfigProperty('settings.workOrders.prints')
      .includes(`pdf/${printName}`)
  ) {
    response.redirect(
      `${configFunctions.getConfigProperty(
        'reverseProxy.urlPrefix'
      )}/dashboard/?error=printConfigNotAllowed`
    )
    return
  }

  const printConfig = getPdfPrintConfig(printName)

  if (printConfig === undefined) {
    response.redirect(
      configFunctions.getConfigProperty('reverseProxy.urlPrefix') +
        '/dashboard/?error=printConfigNotFound'
    )
    return
  }

  const reportData = await getReportData(printConfig, request.query)

  const reportPath = path.join('views', 'print', 'pdf', `${printName}.ejs`)

  function pdfCallbackFunction(pdf: Buffer): void {
    response.setHeader(
      'Content-Disposition',
      `${attachmentOrInline}; filename=${camelcase(printConfig!.title)}.pdf`
    )

    response.setHeader('Content-Type', 'application/pdf')

    response.send(pdf)
  }

  async function ejsCallbackFunction(
    ejsError: Error,
    ejsData: string
  ): Promise<void> {
    if (ejsError) {
      next(ejsError)
      return
    }

    const pdf = await convertHTMLToPDF(ejsData, {
      format: 'letter',
      printBackground: true,
      preferCSSPageSize: true
    })

    pdfCallbackFunction(pdf)
  }

  reportData.configFunctions = configFunctions
  reportData.dateTimeFunctions = dateTimeFunctions
  reportData.lotOccupancyFunctions = lotOccupancyFunctions

  await ejs.renderFile(reportPath, reportData, {}, ejsCallbackFunction)
}

export default handler