/*
 * decaffeinate suggestions:
 * DS207: Consider shorter variations of null checks
 * Full docs: https://github.com/decaffeinate/decaffeinate/blob/master/docs/suggestions.md
 */
const http = require('http')
http.globalAgent.maxSockets = 300

const Settings = {
  internal: {
    docstore: {
      port: 3016,
      host: process.env.LISTEN_ADDRESS || 'localhost'
    }
  },

  mongo: {},

  docstore: {
    backend: process.env.BACKEND || 's3',
    healthCheck: {
      project_id: process.env.HEALTH_CHECK_PROJECT_ID
    },
    bucket: process.env.BUCKET_NAME || 'bucket',
    gcs: {
      unlockBeforeDelete: process.env.GCS_UNLOCK_BEFORE_DELETE === 'true',
      deletedBucketSuffix: process.env.GCS_DELETED_BUCKET_SUFFIX,
      deleteConcurrency: parseInt(process.env.GCS_DELETE_CONCURRENCY) || 50
    }
  },

  max_doc_length: parseInt(process.env.MAX_DOC_LENGTH) || 2 * 1024 * 1024 // 2mb
}

if (process.env.MONGO_CONNECTION_STRING != null) {
  Settings.mongo.url = process.env.MONGO_CONNECTION_STRING
} else if (process.env.MONGO_HOST != null) {
  Settings.mongo.url = `mongodb://${process.env.MONGO_HOST}/sharelatex`
} else {
  Settings.mongo.url = 'mongodb://127.0.0.1/sharelatex'
}

if (
  process.env.AWS_ACCESS_KEY_ID != null &&
  process.env.AWS_SECRET_ACCESS_KEY != null &&
  process.env.AWS_BUCKET != null
) {
  Settings.docstore.s3 = {
    key: process.env.AWS_ACCESS_KEY_ID,
    secret: process.env.AWS_SECRET_ACCESS_KEY,
    bucket: process.env.AWS_BUCKET,
    endpoint: process.env.AWS_S3_ENDPOINT,
    pathStyle: process.env.AWS_S3_PATH_STYLE,
    partSize: parseInt(process.env.AWS_S3_PARTSIZE) || 100 * 1024 * 1024
  }
}

if (process.env.GCS_API_ENDPOINT) {
  Settings.docstore.gcs.endpoint = {
    apiEndpoint: process.env.GCS_API_ENDPOINT,
    apiScheme: process.env.GCS_API_SCHEME,
    projectId: process.env.GCS_PROJECT_ID
  }
}

if (process.env.FALLBACK_BACKEND) {
  Settings.docstore.fallback = {
    backend: process.env.FALLBACK_BACKEND,
    // mapping of bucket names on the fallback, to bucket names on the primary.
    // e.g. { myS3UserFilesBucketName: 'myGoogleUserFilesBucketName' }
    buckets: JSON.parse(process.env.FALLBACK_BUCKET_MAPPING || '{}'),
    copyOnMiss: process.env.COPY_ON_MISS === 'true'
  }
}

module.exports = Settings