module Banks
  class Csas
    # 7777777777
    # https://help.salesforce.com/apex/HTViewHelpDoc?id=remoteaccess_oauth_refresh_token_flow.htm&language=en_US

    def initialize(token, config)
      @config = config
      @token = get_token(token)
    end

    def accounts
      JSON.parse(RestClient.get(@config[:base_uri] + '/netbanking/my/accounts', headers), symbolize_keys: true)['accounts']
    end

    def ibans
      accounts.collect{|ac| ac['accountno']['cz-iban']}
    end

    def transactions(time_start = nil, time_end = nil, iban = nil)
      url = @config[:base_uri] + '/netbanking/cz/my/accounts/' + iban.to_s + '/transactions'
      url += "?dateStart=#{time_start.iso8601}" if time_start.present?
      url += "#{url =~ /\?/ ? '&' : '?'}dateEnd=#{time_end.iso8601}" if time_end.present?

      # RestClient.log = 'stdout'

      trans = []
      transaction_get(url, trans, 0)
      trans
    end

    def transaction_get(url, trans, page)
      response = JSON.parse(RestClient.get(url+"&page=#{page}", headers), symbolize_keys: true)

      response['transactions'].each do |tr|
        trans << {
            id: tr['id'],
            date: tr['bookingDate'],
            amount: tr['amount']['value'],
            currency: tr['amount']['currency'],
            account: "#{tr['accountParty']['accountPrefix']}#{tr['accountParty']['accountNumber']}/#{tr['accountParty']['bankCode']}",
            bank: tr['accountParty']['iban'],
            name: tr['accountParty']['partyInfo'],
            variable_symbol: tr['variableSymbol'],
            message: tr['payeeNote']
        }
      end

      transaction_get(url, trans, response['nextPage']) if response['nextPage'] != response['pageNumber']
      trans
    end

    private

    def headers
      {'WEB-API-key' => @config[:web_api_key], 'Authorization' => "Bearer #{@token}", accept: :json}
    end

    def get_token(token)
      response = RestClient.post @config[:token_uri], {grant_type: 'refresh_token', client_id: @config[:client_id], redirect_uri: '/', client_secret: @config[:secret], refresh_token: token}, content_type: 'application/x-www-form-urlencoded'
      JSON.parse(response, symbolize_keys: true)['access_token']
    end
  end
end