import fs from 'node:fs/promises'
import path from 'node:path'

import chokidar from 'chokidar'
import Debug from 'debug'

import { DEBUG_NAMESPACE } from '../debug.config.js'

import { getConfigProperty } from './config.helpers.js'

const debug = Debug(`${DEBUG_NAMESPACE}:images.helpers`)

/*
 * Burial Site Images
 */

const burialSiteImagesFolder = path.join(
  getConfigProperty('settings.publicInternalPath'),
  'images',
  'burialSites'
)

const burialSiteImageFileExtensions = ['jpg', 'jpeg', 'png']

let burialSiteImages: string[] = []

export async function getBurialSiteImages(): Promise<string[]> {
  if (burialSiteImages.length === 0) {
    // eslint-disable-next-line security/detect-non-literal-fs-filename
    const files = await fs.readdir(burialSiteImagesFolder)

    const images: string[] = []

    for (const file of files) {
      const lowerCaseFileName = file.toLowerCase()

      for (const fileExtension of burialSiteImageFileExtensions) {
        if (lowerCaseFileName.endsWith(`.${fileExtension}`)) {
          images.push(file)
          break
        }
      }
    }

    burialSiteImages = images
  }

  return burialSiteImages
}

function clearCachedBurialSiteImages(): void {
  debug('Burial site images folder changed.')
  burialSiteImages = []
}

if (getConfigProperty('settings.burialSites.refreshImageChanges')) {
  debug('Burial site images watcher enabled.')

  const burialSitesWatcher = chokidar.watch(burialSiteImagesFolder, {
    ignoreInitial: true,
    persistent: true
  })

  burialSitesWatcher.on('add', clearCachedBurialSiteImages)
  // burialSitesWatcher.on('change', clearCachedBurialSiteImages)
  burialSitesWatcher.on('unlink', clearCachedBurialSiteImages)
}

/*
 * Cemetery SVGs
 */

const cemeterySVGsFolder = path.join(
  getConfigProperty('settings.publicInternalPath'),
  'images',
  'cemeteries'
)

const cemeterySVGFileExtensions = ['svg']

let cemeterySVGs: string[] = []

export async function getCemeterySVGs(): Promise<string[]> {
  if (cemeterySVGs.length === 0) {
    // eslint-disable-next-line security/detect-non-literal-fs-filename
    const files = await fs.readdir(cemeterySVGsFolder)

    const SVGs: string[] = []

    for (const file of files) {
      const lowerCaseFileName = file.toLowerCase()

      for (const fileExtension of cemeterySVGFileExtensions) {
        if (lowerCaseFileName.endsWith(`.${fileExtension}`)) {
          SVGs.push(file)
          break
        }
      }
    }

    cemeterySVGs = SVGs
  }

  return cemeterySVGs
}

function clearCachedCemeterySVGs(): void {
  debug('Cemetery SVGs folder changed.')
  cemeterySVGs = []
}

if (getConfigProperty('settings.cemeteries.refreshImageChanges')) {
  debug('Cemetery SVGs watcher enabled.')

  const cemeteryWatcher = chokidar.watch(cemeterySVGsFolder, {
    ignoreInitial: true,
    persistent: true
  })

  cemeteryWatcher.on('add', clearCachedCemeterySVGs)
  // cemeteryWatcher.on('change', clearCachedCemeterySVGs)
  cemeteryWatcher.on('unlink', clearCachedCemeterySVGs)
}