import ifm = require('./interfaces')

export class BasicCredentialHandler implements ifm.IRequestHandler {
  username: string
  password: string

  constructor(username: string, password: string) {
    this.username = username
    this.password = password
  }

  prepareRequest(options: any): void {
    options.headers['Authorization'] =
      'Basic ' +
      Buffer.from(this.username + ':' + this.password).toString('base64')
  }

  // This handler cannot handle 401
  canHandleAuthentication(response: ifm.IHttpClientResponse): boolean {
    return false
  }

  handleAuthentication(
    httpClient: ifm.IHttpClient,
    requestInfo: ifm.IRequestInfo,
    objs
  ): Promise<ifm.IHttpClientResponse> {
    return null
  }
}

export class BearerCredentialHandler implements ifm.IRequestHandler {
  token: string

  constructor(token: string) {
    this.token = token
  }

  // currently implements pre-authorization
  // TODO: support preAuth = false where it hooks on 401
  prepareRequest(options: any): void {
    options.headers['Authorization'] = 'Bearer ' + this.token
  }

  // This handler cannot handle 401
  canHandleAuthentication(response: ifm.IHttpClientResponse): boolean {
    return false
  }

  handleAuthentication(
    httpClient: ifm.IHttpClient,
    requestInfo: ifm.IRequestInfo,
    objs
  ): Promise<ifm.IHttpClientResponse> {
    return null
  }
}

export class PersonalAccessTokenCredentialHandler
  implements ifm.IRequestHandler {
  token: string

  constructor(token: string) {
    this.token = token
  }

  // currently implements pre-authorization
  // TODO: support preAuth = false where it hooks on 401
  prepareRequest(options: any): void {
    options.headers['Authorization'] =
      'Basic ' + Buffer.from('PAT:' + this.token).toString('base64')
  }

  // This handler cannot handle 401
  canHandleAuthentication(response: ifm.IHttpClientResponse): boolean {
    return false
  }

  handleAuthentication(
    httpClient: ifm.IHttpClient,
    requestInfo: ifm.IRequestInfo,
    objs
  ): Promise<ifm.IHttpClientResponse> {
    return null
  }
}