class ProgramsController < ApplicationController
  PATCHES_PER_PAGE = 20

  def index
    list
    render :action => 'list'
  end

  # GETs should be safe (see http://www.w3.org/2001/tag/doc/whenToUseGet.html)
  verify :method => :post, :only => [ :destroy, :create, :update ],
    :redirect_to => { :action => :list }

  def list
    @program_pages, @programs = paginate :programs, :per_page => 10
  end

  def show
    edit
    render :action => 'edit'
  end

  def new
    @program = Program.new
  end

  def create
    @program = Program.new(params[:program])
    if @program.save
      flash[:notice] = 'Program was successfully created.'
      redirect_to :action => 'list'
    else
      render :action => 'new'
    end
  end

  def edit
    @program = Program.find(params[:id])
    session[:program_id] = @program.id
    @paginator, @unapplied_patches = paginate :patches, :per_page => PATCHES_PER_PAGE, :class_name => 'PatchView', :conditions => ["#{PatchView::UNAPPLIED_CONDITION} AND program_id = :pid", {:pid => @program.id}]
  end

  def update
    @program = Program.find(params[:id])
    if @program.update_attributes(params[:program])
      flash[:notice] = 'Program was successfully updated.'
      redirect_to :action => 'show', :id => @program
    else
      render :action => 'edit'
    end
  end

  def destroy
    Program.find(params[:id]).destroy
    redirect_to :action => 'list'
  end

  def unapplied_patches_tar_gz
    program = Program.find(params[:id])
    send_patches(program.unapplied_patches, :filename => "unapplied-#{program.name.downcase.gsub(/[^A-Za-z0-9-]/, '_')}-#{Date.today.strftime('%Y-%m-%d')}.tar.gz")
  end

  def patches_rss
    @headers["Content-Type"] = "application/xml"
    program = Program.find(params[:id])
    @patches = program.patches
    @title = "PatchServer patches (#{program.name})"
    @description = "Patches for #{program.name}"
    render :template => 'shared/patches_rss', :layout => false
  end

  def directory
    @programs  = Program.with_most_patches
    @n_columns = 3
  end



  # Ajax actions

  def ajax_get_program_unapplied_patches
    @program = Program.find(session[:program_id])
    @paginator, @unapplied_patches = paginate_unapplied_patches
    render :inline => <<EOD
        <%= listing(@unapplied_patches, 'program_unapplied_patch_header', 'program_unapplied_patch_row',
                    :pagination_action => :ajax_get_program_unapplied_patches,
                    :paginator => @paginator,
                    :columns => 5) %>
EOD
  end


  protected

  def paginate_unapplied_patches(user_options)
    options = {:per_page => PATCHES_PER_PAGE,
      :class_name => 'PatchView',
      :conditions => ["#{PatchView::UNAPPLIED_CONDITION} AND program_id = :pid", {:pid => @program.id}],
      :order => 'applied_since_version DESC, for_upstream_version DESC'}.merge(user_options)
    @paginator, @unapplied_patches = paginate :patches, options
  end
end