export const USER_AGENT: string
export const SIP = 'sip'
export const SIPS = 'sips'

export declare enum causes {
  CONNECTION_ERROR = 'Connection Error',
  REQUEST_TIMEOUT = 'Request Timeout',
  SIP_FAILURE_CODE = 'SIP Failure Code',
  INTERNAL_ERROR = 'Internal Error',
  BUSY = 'Busy',
  REJECTED = 'Rejected',
  REDIRECTED = 'Redirected',
  UNAVAILABLE = 'Unavailable',
  NOT_FOUND = 'Not Found',
  ADDRESS_INCOMPLETE = 'Address Incomplete',
  INCOMPATIBLE_SDP = 'Incompatible SDP',
  MISSING_SDP = 'Missing SDP',
  AUTHENTICATION_ERROR = 'Authentication Error',
  BYE = 'Terminated',
  WEBRTC_ERROR = 'WebRTC Error',
  CANCELED = 'Canceled',
  NO_ANSWER = 'No Answer',
  EXPIRES = 'Expires',
  NO_ACK = 'No ACK',
  DIALOG_ERROR = 'Dialog Error',
  USER_DENIED_MEDIA_ACCESS = 'User Denied Media Access',
  BAD_MEDIA_DESCRIPTION = 'Bad Media Description',
  RTP_TIMEOUT = 'RTP Timeout',
}

export const SIP_ERROR_CAUSES: {
  REDIRECTED: [300, 301, 302, 305, 380],
  BUSY: [486, 600],
  REJECTED: [403, 603],
  NOT_FOUND: [404, 604],
  UNAVAILABLE: [480, 410, 408, 430],
  ADDRESS_INCOMPLETE: [484, 424],
  INCOMPATIBLE_SDP: [488, 606],
  AUTHENTICATION_ERROR: [401, 407]
}
export const ACK = 'ACK'
export const BYE = 'BYE'
export const CANCEL = 'CANCEL'
export const INFO = 'INFO'
export const INVITE = 'INVITE'
export const MESSAGE = 'MESSAGE'
export const NOTIFY = 'NOTIFY'
export const OPTIONS = 'OPTIONS'
export const REGISTER = 'REGISTER'
export const REFER = 'REFER'
export const UPDATE = 'UPDATE'
export const SUBSCRIBE = 'SUBSCRIBE'

export declare enum DTMF_TRANSPORT {
  INFO = 'INFO',
  RFC2833 = 'RFC2833',
}

export const REASON_PHRASE: Record<number, string>
export const ALLOWED_METHODS = 'INVITE,ACK,CANCEL,BYE,UPDATE,MESSAGE,OPTIONS,REFER,INFO,NOTIFY'
export const ACCEPTED_BODY_TYPES = 'application/sdp, application/dtmf-relay'
export const MAX_FORWARDS = 69
export const SESSION_EXPIRES = 90
export const MIN_SESSION_EXPIRES = 60
export const CONNECTION_RECOVERY_MAX_INTERVAL = 30
export const CONNECTION_RECOVERY_MIN_INTERVAL = 2