require "active_support"
require "action_controller"

begin
  require "action_controller/request" # Rails 2.3
rescue LoadError
end

require "uri"

module OAuth::RequestProxy
  class ActionControllerRequest < OAuth::RequestProxy::Base

    if defined?(ActionDispatch::Request)
      proxies(ActionDispatch::Request)
    elsif defined?(ActionController::AbstractRequest)
      proxies(ActionController::AbstractRequest)
    else
      proxies(ActionController::Request)
    end

    def method
      request.method.to_s.upcase
    end

    def uri
      request.url
    end

    def parameters
      if options[:clobber_request]
        options[:parameters] || {}
      else
        params = request_params.merge(query_params).merge(header_params)
        params.stringify_keys! if params.respond_to?(:stringify_keys!)
        params.merge(options[:parameters] || {})
      end
    end

    # Override from OAuth::RequestProxy::Base to avoid roundtrip
    # conversion to Hash or Array and thus preserve the original
    # parameter names
    def parameters_for_signature
      params = []
      params << options[:parameters].to_query if options[:parameters]

      unless options[:clobber_request]
        params << header_params.to_query
        params << request.query_string unless request.query_string.blank?
        if request.post? && request.content_type == Mime::Type.lookup("application/x-www-form-urlencoded")
          params << request.raw_post
        end
      end

      params.
        join("&").split("&").
        reject(&:blank?).
        map { |p| p.split("=").map{ |esc| CGI.unescape(esc)} }.
        reject { |kv| kv[0] == "oauth_signature"}
    end

    protected

    def query_params
      request.query_parameters
    end

    def request_params
      request.request_parameters
    end

  end
end