class ActivitiesController < ApplicationController
  helper :sparklines                    # sparklines helps with flash graphs
  before_filter :authorize              # force authorisation
  layout "main", :except => :graph_xml  # graph_xml is loaded only by AJAX, no layout needed

  require 'params_filter'
  include ParamsFilter


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


  def search
    case params[:commit]
      when "Search"
        list
        render :action => 'list'
      when "Export to CSV"
        report
      when "Generate graph"
        graph
        render :action => 'graph'
      else
        redirect_to :action => 'list'
    end
  end

  def list
    if params[:search] or session[:month] or session[:year]

      prepare_search_dates


      @client_id = Project.find(params[:search][:project_id]).client_id unless params[:search][:project_id].blank?
      @invoices = @client_id && Invoice.find_all_by_client_id_and_is_issued(@client_id, false, :order => "created_at DESC")

      @activities = Activity.list(params[:search])
    else

      @activities = Activity.list({}, {:page => params[:page]})
    end
  end


  def show
    if ( @activity = Activity.find(params[:id]) ).nil?
      flash[:notice] = "No such activity"
      redirect_to :action => :index
    end
  end


  def edit
    begin
      @activity = Activity.find(params[:id])
      @projects = Project.find(:all)
    rescue
      flash[:notice] = "No such activity"
      redirect_to :action => :index
    else
      @selected = {'project_id' => ''}
      if (@activity.project)
	@selected['project_id']=@activity.project.id.to_i
      end
    end
  end


  def update
    begin
      @activity = Activity.find(params[:id])
      @projects = Project.find(:all)
    rescue
      flash[:notice] = "No such activity"
      redirect_to :action => :index
    else
      @selected = {'project_id' => ''}
      if (@activity.project)
        @selected['project_id']=@activity.project.id.to_i
      end
      params[:activity]['minutes']= Activity.convert_duration(params[:activity]['minutes'])
      if @activity.update_attributes(params[:activity])
        flash[:notice] = 'Activity has been successfully updated'
        redirect_to :action => 'show', :id => @activity
      else
        render :action => 'edit'
      end
    end
  end

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


  def graph
    prepare_search_dates
    @activities = Activity.for_graph( params[:search] )[:activities]
    session[:graph] = params[:search]
  end


  def graph_xml
    params[:search] = session[:graph]
    session[:graph] = nil

    prepare_search_dates
    query_results = Activity.for_graph( params[:search] )

    @activities     = query_results[:activities]
    @grouped_roles  = query_results[:grouped_roles]
    @weeks          = query_results[:weeks]
    @years          = query_results[:years]

  end


  def report
    prepare_search_dates
    activities = Activity.list( params[:search] )

    require 'csv'

    report = StringIO.new
    minutes = 0
    ::CSV::Writer.generate(report, ',') do |csv|
      header = ["Name", "Login", "Role", "Date", "Minutes"]
      header << "Comments" if params[:search] and params[:search][:details]
      csv << header
      activities.each do |activity|
        minutes += activity.minutes
	      data = [activity.project.name, activity.user.login, activity.user.role.name, activity.date, activity.minutes]
	      data << activity.comments if params[:search] and params[:search][:details]
        csv << data
      end
      csv << ["Sum", minutes]
    end

    report.rewind
    send_data(report.read,
      :type => 'text/csv; charset=utf-8; header=present',
      :filename => 'report.csv')
  end



  def show_activity_data
    @activity = Activity.find(params[:id])
    render :layout => false
  end

end