# The controller for serving cms content...
class ComatoseController < ActionController::Base 
  unloadable
  
  before_filter :handle_authorization, :set_content_type
  after_filter :cache_cms_page
    
  # Render a specific page
  def show
    page_name, page_ext = get_page_path
    page = ComatosePage.find_by_path( page_name )
    status = nil
    if page.nil?
      page = ComatosePage.find_by_path( '404' )
      status = 404
    end
    # if it's still nil, well, send a 404 status
    if page.nil?
      render :nothing=>true, :status=>status
      #raise ActiveRecord::RecordNotFound.new("Comatose page not found ")
    else
      # Make the page access 'safe' 
      @page = Comatose::PageWrapper.new(page)
      # For accurate uri creation, tell the page class which is the active mount point...
      ComatosePage.active_mount_info = get_active_mount_point(params[:index])
      render :text=>page.to_html({'params'=>params.stringify_keys}), :layout=>get_page_layout, :status=>status
    end
  end

protected

  def handle_authorization
    if Comatose.config.authorization.is_a? Proc
      instance_eval &Comatose.config.authorization
    elsif Comatose.config.authorization.is_a? Symbol
      send(Comatose.config.authorization)
    elsif defined? authorize
      authorize
    else
      true
    end
  end

  def allow_page_cache?
    # You should have access to the @page being rendered
    true
  end

  # For use in the #show method... determines the current mount point
  def get_active_mount_point( index )
    Comatose.mount_points.each do |path_info|
      if path_info[:index] == index
        return path_info
      end
    end
    {:root=>"", :index=>index}
  end

  # For use in the #show method... determines the current page path
  def get_page_path

    #in rails 2.0, params[:page] comes back as just an Array, so to_s doesn't do join('/')
    if params[:page].is_a? Array
      page_name = params[:page].join("/")
    #in rails 1.x, params[:page] comes back as ActionController::Routing::PathSegment::Result
    elsif params[:page].is_a? ActionController::Routing::PathSegment::Result
      page_name = params[:page].to_s
    else
      logger.debug "get_page_path - params[:page] is an unrecognized type, may cause problems: #{params[:page].class}"
      page_name = params[:page].to_s
    end

    page_ext = page_name.split('.')[1] unless page_name.empty?
    # TODO: Automatic support for page RSS feeds... ????
    if page_name.nil? or page_name.empty?
      page_name = params[:index]
      params[:cache_path] = "#{request.request_uri}/index"
    elsif !params[:index].empty?
      page_name = "#{params[:index]}/#{page_name}"
    end
    return page_name, page_ext
  end

  # Returns a path to plugin layout, if it's unspecified, otherwise
  # a path to an application layout...
  def get_page_layout
    params[:layout]
  end

  # An after_filter implementing page caching if it's enabled, globally, 
  # and is allowed by #allow_page_cache?
  def cache_cms_page
    unless Comatose.config.disable_caching or response.headers['Status'] == '404 Not Found'
      return unless params[:use_cache].to_s == 'true' and allow_page_cache?
      path = params[:cache_path] || request.request_uri
      begin
        # TODO: Don't cache pages rendering '404' content...
        self.class.cache_page( response.body, path )
      rescue
        logger.error "Comatose CMS Page Cache Exception: #{$!}"
      end
    end
  end

  # An after_filter that sets the HTTP header for Content-Type to
  # what's defined in Comatose.config.content_type. Defaults to utf-8.
  def set_content_type
    response.headers["Content-Type"] = "text/html; charset=#{Comatose.config.content_type}" unless Comatose.config.content_type.nil? or response.headers['Status'] == '404 Not Found'
  end

  COMATOSE_VIEW_PATH = File.join(RAILS_ROOT, 'vendor', 'plugins', 'comatose', 'views')
  ActionController::Base.append_view_path(COMATOSE_VIEW_PATH) unless ActionController::Base.view_paths.include?(COMATOSE_VIEW_PATH)

  # Include any, well, includes...
  Comatose.config.includes.each do |mod|
    mod_klass = if mod.is_a? String
      mod.constantize
    elsif mod.is_a? Symbol
      mod.to_s.classify.constantize
    else
      mod
    end
    include mod_klass
  end
  
  # Include any helpers...
  Comatose.config.helpers.each do |mod|
    mod_klass = if mod.is_a? String
      mod.constantize
    elsif mod.is_a? Symbol
      mod.to_s.classify.constantize
    else
      mod
    end
    helper mod_klass
  end
end