/* eslint-disable @typescript-eslint/no-var-requires */
import * as admin from 'firebase-admin'
import { getConfigFromPackageJson, Config } from './configParser'
import * as path from 'path'

type ServiceAccountJson = {
  type: string
  project_id: string
  private_key_id: string
  private_key: string
  client_email: string
  client_id: string
  auth_uri: string
  token_uri: string
  auth_provider_x509_cert_url: string
  client_x509_cert_url: string
}

export function initializeAccount() {
  const cwd = process.cwd()
  let useFirebaseAccount = process.env.FIREBASE_SERVICE_ACCOUNT_PATH

  if (!useFirebaseAccount) {
    const config: Required<Config> | Error = getConfigFromPackageJson(cwd)

    if (config instanceof Error) throw config

    useFirebaseAccount = config.firebaseServiceAccountPath
  }

  let PROJECT_ID: undefined | string = undefined
  if (useFirebaseAccount) {
    const serviceAccount:
      | admin.ServiceAccount
      | ServiceAccountJson
      | undefined = require(path.join(
      cwd,
      useFirebaseAccount
    )) as admin.ServiceAccount

    if (serviceAccount && (serviceAccount as ServiceAccountJson).project_id) {
      PROJECT_ID = (serviceAccount as ServiceAccountJson).project_id
    }

    if (serviceAccount && (serviceAccount as admin.ServiceAccount).projectId) {
      PROJECT_ID = (serviceAccount as admin.ServiceAccount).projectId
    }
    if (admin.apps.length <= 0) {
      admin.initializeApp({
        credential: admin.credential.cert(
          serviceAccount as admin.ServiceAccount
        ),
        databaseURL:
          process.env.FIREBASE_REALTIME_DATABASE_URL ||
          `https://${PROJECT_ID}.firebaseio.com`,
      })

      admin.firestore().settings({
        timestampsInSnapshots: true,
      })
    }
  }
}