import { SecretsManager } from 'aws-sdk'

import { Secret } from '../typings/global'

export class Secrets {
  private _client: SecretsManager

  constructor() {
    this._client = new SecretsManager()
  }

  async loadEnvironment(): Promise<void> {
    globalThis.secret = await this.resolveSecret()

    process.env.FIREBASE_AUTH_MIGRATION_HASH = globalThis.secret.firebase_auth.migration_hash
    process.env.SMARTFIT_API_ENDPOINT = globalThis.secret.smartfit.api.endpoint
    process.env.SMARTFIT_API_CLIENT_TOKEN = globalThis.secret.smartfit.api.token.client
    process.env.SMARTFIT_API_AUTHORIZATION_TOKEN = globalThis.secret.smartfit.api.token.authorization
    process.env.AWS_SNS_REGION = globalThis.secret.aws.region
    process.env.COMTELE_ENABLED = `${globalThis.secret.comtele.enabled}`
    process.env.COMTELE_API_KEY = globalThis.secret.comtele.api_key

    this.makeRedisURL()
  }

  private async resolveSecret(): Promise<Secret> {
    return new Promise((resolve, reject) => {
      this._client.getSecretValue({ SecretId: process.env.SECRET_ID }, function(err, data) {
        try {
          if (err) return reject(err)

          const secrets = JSON.parse('SecretString' in data ? data.SecretString : data.SecretBinary.toString('ascii'))

          return resolve(secrets)
        } catch (error) {
          if (error?.message?.startsWith('Unexpected token'))
            return reject(new Error('Malformed JSON of secret parameters'))

          return reject(error)
        }
      })
    })
  }

  private makeRedisURL(): void {
    if (!process.env.REDIS_PORT) return

    globalThis.secret.redis.url = `redis://localhost:${process.env.REDIS_PORT}`
  }
}