/*
 *
 * @copyright Copyright (c) OX Software GmbH, Germany <info@open-xchange.com>
 * @license AGPL-3.0
 *
 * This code is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with OX App Suite. If not, see <https://www.gnu.org/licenses/agpl-3.0.txt>.
 *
 * Any use of the work other than as authorized under this license or copyright law is prohibited.
 *
 */

import Redis from 'ioredis'
import logger from './logger.js'

const commonQueueOptions = { enableReadyCheck: false, maxRetriesPerRequest: null }

const hosts = (process.env.REDIS_HOSTS || '').split(',').map(host => {
  const [hostname, port] = host.split(':')
  return { host: hostname, port: Number(port) }
})

export function createClient (id, options = commonQueueOptions) {
  options = {
    username: process.env.REDIS_USERNAME,
    db: Number(process.env.REDIS_DB),
    password: process.env.REDIS_PASSWORD,
    ...options
  }

  if (process.env.REDIS_MODE === 'sentinel') {
    options = {
      sentinels: hosts,
      name: process.env.REDIS_SENTINEL_MASTER_ID,
      ...options
    }
  } else if (process.env.REDIS_MODE === 'standalone') {
    options = {
      ...hosts[0],
      ...options
    }
  }
  const client = process.env.REDIS_MODE === 'cluster'
    ? new Redis.Cluster(hosts, { redisOptions: options })
    : new Redis(options)

  client.on('ready', () => logger.info(`[Redis] Connected ${id} to redis on ${process.env.REDIS_HOSTS}`))
  client.on('error', (err) => logger.error(`[Redis] Connect error: ${err}`))

  return client
}

export async function isReady () {
  return new Promise(resolve => {
    client.on('ready', () => resolve(true))
    client.on('error', () => resolve(false))
  }).catch(() => false)
}

export const client = createClient('common client', { maxRetriesPerRequest: 1 })

export function isEnabled () {
  return !!process.env.REDIS_HOST
}