require 'json'
require 'faraday'

module LYBC

  @@api_endpoint = "http://api.rel.lybc.cipsrv.xyz/actionresult/ecomm"
  def self.api_endpoint
    @@api_endpoint
  end

  def self.api_endpoint=(endpoint)
    @@api_endpoint = endpoint
  end

  @@api_prefix = ""
  def self.api_prefix
    @@api_prefix
  end

  def self.api_prefix=(prefix)
    raise("API prefix should start with /") unless (prefix[0] == '/')
    @@api_prefix = prefix
  end

  def self.api_url
    "#{@@api_endpoint}"
  end

  class Client
    attr_accessor :session_id

    def initialize(session_id)
      @session_id = session_id
      @conn = Faraday.new()
    end

    def registerSession(associationID = "")
        body = {
          'sessionID' => @session_id.to_s,
          'action' => 'registerSession',
          'data' => {
            'associationID' => associationID.to_s,
            'expirationDate' => "2017-2-24"
          }
        }

        response = @conn.post(LYBC.api_endpoint, body.to_json, 'Content-Type' => 'application/json')
        JSON.parse(response.body)
    end

    def getAssociation
      body = {
          'sessionID' => @session_id,
          'action' => 'getAssociation',
          'data' => {}
      }

      response = @conn.post("#{LYBC.api_endpoint}", body.to_json, 'Content-Type' => 'application/json')
      JSON.parse(response.body)
    end

    def getSelectedCoupons
      body = {
          'sessionID' => @session_id,
          'action' => 'getSelectedCoupons',
          'data' => {}
      }

      response = @conn.post("#{LYBC.api_url}", body.to_json, 'Content-Type' => 'application/json')
      JSON.parse(response.body)
    end

    def cashSelectedCoupons
      body = {
          'sessionID' => @session_id,
          'action' => 'cashSelectedCoupons',
          'data' => {}
      }

      response = @conn.post("#{LYBC.api_url}", body.to_json, 'Content-Type' => 'application/json')
      JSON.parse(response.body)
    end

    [:registerSession, :getAssociation, :getSelectedCoupons, :cashSelectedCoupons].each do |method|
      define_method("#{method}!".to_sym) do
        response = self.send(method)
        raise Exception.new('Response was not successful') unless is_successful?(response)
      end
    end

    private

    def is_successful?(parsed_response)
      parsed_response['status'] == 1
    end

  end

end