module Postcodes

# File lib/postcodes.rb, line 17
def self.request(method, path, params = {})
        unless @api_key
                raise Postcodes::AuthenticationError.new('No API Key provided. ' +
                        'Set your API key using Postcodes.api_key = #your_key')
        end

        url = URI.parse(resource_url(path))
        params.merge! api_key: @api_key
        url.query = Util.merge_params(params)
        request_options = {
                method: method.downcase.to_sym,
                url: url.to_s
        }

        begin
                response = generate_request(request_options)
        rescue RestClient::ExceptionWithResponse => error
                if rcode = error.http_code && rbody = error.http_body
                        handle_error(rcode, rbody)
                else
                        handle_client_error(error)
                end
        rescue RestClient::Exception, Errno::ECONNREFUSED => error
                handle_client_error(e)
        end
        parse response.body
end

# File lib/postcodes.rb, line 90
def self.general_error(response_code, response_body)
        PostcodesError.new "Invalid response object", response_code, response_body
end

# File lib/postcodes.rb, line 51
def self.generate_request(options)
        RestClient::Request.execute(options)
end

# File lib/postcodes.rb, line 86
def self.handle_client_error(error)
        raise PostcodesError.new("Unexpected error occurred: #{error.message})")
end

# File lib/postcodes.rb, line 63
    def self.handle_error(http_code, http_body)
error = parse http_body

            opc_code, opc_message = error[:code], error[:message]
            
            case opc_code
            when 4010
                    raise AuthenticationError.new opc_message, http_code, http_body, opc_code
            when 4011
                    raise RefererExcludedError.new opc_message, http_code, http_body, opc_code
            when 4020
                    raise TokenExhaustedError.new opc_message, http_code, http_body, opc_code
            when 4021
                    raise LimitReachedError.new opc_message, http_code, http_body, opc_code
            when 4040
                    raise ResourceNotFoundError.new opc_message, http_code, http_body, opc_code
            when 4220
                    raise InvalidInputError.new opc_message, http_code, http_body, opc_code
            else
                    raise PostcodesError.new opc_message, http_code, http_body, opc_code
            end
    end

# File lib/postcodes.rb, line 55
    def self.parse(response)
            begin
  Util.keys_to_sym MultiJson.load(response)
rescue MultiJson::DecodeError => e
  raise handle_client_error(e)
end
    end

# File lib/postcodes.rb, line 47
def self.resource_url(path='')
        URI.escape "#{@base_url}/v#{@version}/#{path}"
end