=begin
#MX API

#The MX Atrium API supports over 48,000 data connections to thousands of financial institutions. It provides secure access to your users' accounts and transactions with industry-leading cleansing, categorization, and classification.  Atrium is designed according to resource-oriented REST architecture and responds with JSON bodies and HTTP response codes.  Use Atrium's development environment, vestibule.mx.com, to quickly get up and running. The development environment limits are 100 users, 25 members per user, and access to the top 15 institutions. Contact MX to purchase production access. 


=end

require 'uri'

module Atrium
  class Configuration
    # Defines url scheme
    attr_accessor :scheme

    # Defines url host
    attr_accessor :host

    # Defines url base path
    attr_accessor :base_path

    # Defines API keys used with API Key authentications.
    #
    # @return [Hash] key: parameter name, value: parameter value (API key)
    #
    # @example parameter name is "api_key", API key is "xxx" (e.g. "api_key=xxx" in query string)
    #   config.api_key['api_key'] = 'xxx'
    attr_accessor :api_key

    # Defines API key prefixes used with API Key authentications.
    #
    # @return [Hash] key: parameter name, value: API key prefix
    #
    # @example parameter name is "Authorization", API key prefix is "Token" (e.g. "Authorization: Token xxx" in headers)
    #   config.api_key_prefix['api_key'] = 'Token'
    attr_accessor :api_key_prefix

    # Defines the username used with HTTP basic authentication.
    #
    # @return [String]
    attr_accessor :username

    # Defines the password used with HTTP basic authentication.
    #
    # @return [String]
    attr_accessor :password

    # Defines the access token (Bearer) used with OAuth2.
    attr_accessor :access_token

    # Set this to enable/disable debugging. When enabled (set to true), HTTP request/response
    # details will be logged with `logger.debug` (see the `logger` attribute).
    # Default to false.
    #
    # @return [true, false]
    attr_accessor :debugging

    # Defines the logger used for debugging.
    # Default to `Rails.logger` (when in Rails) or logging to STDOUT.
    #
    # @return [#debug]
    attr_accessor :logger

    # Defines the temporary folder to store downloaded files
    # (for API endpoints that have file response).
    # Default to use `Tempfile`.
    #
    # @return [String]
    attr_accessor :temp_folder_path

    # The time limit for HTTP request in seconds.
    # Default to 0 (never times out).
    attr_accessor :timeout

    # Set this to false to skip client side validation in the operation.
    # Default to true.
    # @return [true, false]
    attr_accessor :client_side_validation

    ### TLS/SSL setting
    # Set this to false to skip verifying SSL certificate when calling API from https server.
    # Default to true.
    #
    # @note Do NOT set it to false in production code, otherwise you would face multiple types of cryptographic attacks.
    #
    # @return [true, false]
    attr_accessor :verify_ssl

    ### TLS/SSL setting
    # Set this to false to skip verifying SSL host name
    # Default to true.
    #
    # @note Do NOT set it to false in production code, otherwise you would face multiple types of cryptographic attacks.
    #
    # @return [true, false]
    attr_accessor :verify_ssl_host

    ### TLS/SSL setting
    # Set this to customize the certificate file to verify the peer.
    #
    # @return [String] the path to the certificate file
    #
    # @see The `cainfo` option of Typhoeus, `--cert` option of libcurl. Related source code:
    # https://github.com/typhoeus/typhoeus/blob/master/lib/typhoeus/easy_factory.rb#L145
    attr_accessor :ssl_ca_cert

    ### TLS/SSL setting
    # Client certificate file (for client certificate)
    attr_accessor :cert_file

    ### TLS/SSL setting
    # Client private key file (for client certificate)
    attr_accessor :key_file

    # Set this to customize parameters encoding of array parameter with multi collectionFormat.
    # Default to nil.
    #
    # @see The params_encoding option of Ethon. Related source code:
    # https://github.com/typhoeus/ethon/blob/master/lib/ethon/easy/queryable.rb#L96
    attr_accessor :params_encoding

    attr_accessor :inject_format

    attr_accessor :force_ending_format

    def initialize
      @scheme = 'https'
      @host = 'vestibule.mx.com'
      @base_path = ''
      @api_key = {}
      @api_key_prefix = {}
      @timeout = 0
      @client_side_validation = true
      @verify_ssl = true
      @verify_ssl_host = true
      @params_encoding = nil
      @cert_file = nil
      @key_file = nil
      @debugging = false
      @inject_format = false
      @force_ending_format = false
      @logger = defined?(Rails) ? Rails.logger : Logger.new(STDOUT)

      yield(self) if block_given?
    end

    # The default Configuration object.
    def self.default
      @@default ||= Configuration.new
    end

    def configure
      yield(self) if block_given?
    end

    def scheme=(scheme)
      # remove :// from scheme
      @scheme = scheme.sub(/:\/\//, '')
    end

    def host=(host)
      # remove http(s):// and anything after a slash
      @host = host.sub(/https?:\/\//, '').split('/').first
    end

    def base_path=(base_path)
      # Add leading and trailing slashes to base_path
      @base_path = "/#{base_path}".gsub(/\/+/, '/')
      @base_path = '' if @base_path == '/'
    end

    def base_url
      url = "#{scheme}://#{[host, base_path].join('/').gsub(/\/+/, '/')}".sub(/\/+\z/, '')
      URI.encode(url)
    end

    # Gets API key (with prefix if set).
    # @param [String] param_name the parameter name of API key auth
    def api_key_with_prefix(param_name)
      if @api_key_prefix[param_name]
        "#{@api_key_prefix[param_name]} #{@api_key[param_name]}"
      else
        @api_key[param_name]
      end
    end

    # Gets Basic Auth token string
    def basic_auth_token
      'Basic ' + ["#{username}:#{password}"].pack('m').delete("\r\n")
    end

    # Returns Auth Settings hash for api client.
    def auth_settings
      {
        'apiKey' =>
          {
            type: 'api_key',
            in: 'header',
            key: 'MX-API-Key',
            value: api_key_with_prefix('MX-API-Key')
          },
        'clientID' =>
          {
            type: 'api_key',
            in: 'header',
            key: 'MX-Client-ID',
            value: api_key_with_prefix('MX-Client-ID')
          },
      }
    end
  end
end