// Type definitions for oauth-1.0a v2.2.3
// Project: oauth1.0a
// Definitions by: Ddo <http://ddo.me>

export as namespace OAuth
export = OAuth

declare class OAuth {
  body_hash_function: OAuth.BodyHashFunction
  consumer: OAuth.Consumer
  hash_function: OAuth.HashFunction
  last_ampersand: boolean
  nonce_length: number
  parameter_seperator: string
  realm: string
  signature_metho: string
  version: string
  timestamp: number
  nonce: string
  token: string
  secret: string
  verifier: string

  constructor(opts?: OAuth.Options)

  /**
   * Sign a request.
   */
  authorize(
    request: OAuth.RequestOptions,
    token?: OAuth.Token,
  ): OAuth.Authorization

  /**
   * Generate the oauth signature (i.e. oauth_signature).
   */
  getSignature(
    request: OAuth.RequestOptions,
    token_secret: string | undefined,
    oauth_data: OAuth.Data,
  ): string

  /**
   * Generate the body signature (i.e. oauth_body_hash).
   */
  getBodyHash(
    request: OAuth.RequestOptions,
    token_secret: string | undefined,
  ): string

  /**
   * Encode the request attributes.
   *
   * Base String = "<Method>&<Base Url>&<ParameterString>"
   */
  getBaseString(request: OAuth.RequestOptions, oauth_data: OAuth.Data): string

  /**
   * Encode the oauth data and the request parameter,
   */
  getParameterString(
    request: OAuth.RequestOptions,
    oauth_data: OAuth.Data,
  ): string

  /**
   * Generate the signing key.
   *
   * Key = "<Consumer Key>&<Token Key or an empty string>"
   */
  getSigningKey(token_secret: string | undefined): string

  /**
   * Return the the URL without its querystring.
   */
  getBaseUrl(url: string): string

  /**
   * Parse querystring / form data.
   */
  deParam(str: string): OAuth.Param

  /**
   * Parse querystring from an url
   */
  deParamUrl(url: string): OAuth.Param

  /**
   * Form data encoding.
   */
  percentEncode(str: string): string

  /**
   * Convert OAuth authorization data to an http header.
   */
  toHeader(data: OAuth.Authorization): OAuth.Header

  /**
   * Generate a random nonce.
   */
  getNonce(): string

  /**
   * Generate a current timestamp in second.
   */
  getTimeStamp(): number

  /**
   * Merge two object into a new one.
   */
  mergeObject<T, U>(obj1: T, obj2: U): T & U

  /**
   * Sort an object properties by keys.
   */
  sortObject<O extends { [k: string]: any }, K extends string>(
    obj: O,
  ): Array<{ key: keyof O; value: O[K] }>
}

declare namespace OAuth {
  /**
   * OAuth data, including the signature.
   */
  export interface Authorization extends Data {
    oauth_signature: string
  }

  /**
   * Method used to generate the body hash.
   *
   * Note: the key is used for implementation HMAC algorithms for the body hash,
   * but typically it should return SHA1 hash of base_string.
   */
  export type BodyHashFunction = (base_string: string, key: string) => string

  /**
   * OAuth key/secret pair.
   */
  export interface Consumer {
    key: string
    secret: string
  }

  /**
   * OAuth data, excluding the signature.
   */
  export interface Data {
    oauth_consumer_key: string
    oauth_nonce: string
    oauth_signature_method: string
    oauth_timestamp: number
    oauth_version: string
    oauth_token?: string
    oauth_body_hash?: string
    oauth_verifier?: string
    oauth_token?: string
    oauth_secret?: string
  }

  /**
   * Method used to hash the the OAuth and form/querystring data.
   */
  export type HashFunction = (base_string: string, key: string) => string

  /**
   * Authorization header.
   */
  export interface Header {
    Authorization: string
  }

  /**
   * OAuth options.
   */
  export interface Options {
    body_hash_function?: BodyHashFunction
    consumer: Consumer
    hash_function?: HashFunction
    last_ampersand?: boolean
    nonce_length?: number
    parameter_seperator?: string
    realm?: string
    signature_method?: string
    version?: string
    timestamp: number
    nonce: string
    token?: string
    secret?: string
    verifier?: string
  }

  /**
   * Extra data.
   */
  export interface Param {
    [key: string]: string | string[]
  }

  /**
   * Request options.
   */
  export interface RequestOptions {
    url: string
    method: string
    data?: any
    includeBodyHash?: boolean
  }

  /**
   * OAuth token key/secret pair.
   */
  export interface Token {
    key: string
    secret: string
  }
}