require 'rubygems'
require 'rack'
require File.join(File.dirname(__FILE__), 'endpoint_initializer')

module Jangle
  
  # Effectively a passthrough endpoint which proxies a request
  # through to another HTTP server
  class HttpEndpoint
    include EndpointInitializer

    def serve(rack_request)
      original_rack_request = rack_request.clone
        
      # Filter the request
      @request_filters.each do |rf|  
        rf.filter(rack_request)
      end
      
      LOGGER.debug "Request to be forwarded (after filtering):"
      LOGGER.debug rack_request.inspect
      
      # Forward the request
      options = {:port => @port}
      options[:path] = @path unless @path.nil?
      http_response = rack_request.forward_to(@host, options)
      
      LOGGER.debug "Response before filtering (from proxied host):"
      LOGGER.debug http_response.to_s
      
      # Filter the HTTP response
      @response_filters.each do |rf|
        rf.filter(http_response)
      end
      
      # Filter the HTTP response through filters which need the original request
      @request_sensitive_response_filters.each do |rf|
        rf.filter(original_rack_request, rack_request, http_response)
      end
      
      # Construct the response to send back from the endpoint
      response_headers = http_response.to_hash
      body = http_response.body || ''
      rack_response = Rack::Response.new(body, http_response.code, response_headers)
      
      # Fix for Rack failing to respect the Content-Type header when creating a new
      # Rack::Response instance
      rack_response['Content-Type'] = response_headers['content-type']
      
      rack_response
    end
  end

end