# encoding: utf-8

module Nanoc3::CLI::Commands

  class Debug < Cri::Command

    def name
      'debug'
    end

    def aliases
      []
    end

    def short_desc
      'show debug information for this site'
    end

    def long_desc
      'Show information about all items, item representations and layouts ' \
      'in the current site.'
    end

    def usage
      "nanoc3 debug"
    end

    def option_definitions
      []
    end

    def run(options, arguments)
      # Make sure we are in a nanoc site directory
      print "Loading site data... "
      @base.require_site
      @base.site.load_data
      puts "done"
      puts

      # Get data
      items   = @base.site.items
      reps    = items.map { |i| i.reps }.flatten
      layouts = @base.site.layouts

      # Get dependency tracker
      # FIXME clean this up
      dependency_tracker = @base.site.compiler.send(:dependency_tracker)
      dependency_tracker.load_graph

      # Print item dependencies
      puts '=== Item dependencies ======================================================='
      puts
      items.sort_by { |i| i.identifier }.each do |item|
        puts "item #{item.identifier} depends on:"
        predecessors = dependency_tracker.direct_predecessors_of(item).sort_by { |i| i.identifier }
        predecessors.each do |pred|
          puts "  #{pred.identifier}"
        end
        puts "  (nothing)" if predecessors.empty?
        puts
      end

      # Print representation paths
      puts '=== Representation paths ===================================================='
      puts
      items.sort_by { |i| i.identifier }.each do |item|
        item.reps.sort_by { |r| r.name.to_s }.each do |rep|
          puts "item #{item.identifier}, rep #{rep.name}:"
          puts "  #{rep.raw_path || '(not written)'}"
        end
        puts
      end

      # Print representation outdatedness
      puts '=== Representation outdatedness ============================================='
      puts
      items.sort_by { |i| i.identifier }.each do |item|
        item.reps.sort_by { |r| r.name.to_s }.each do |rep|
          puts "item #{item.identifier}, rep #{rep.name}:"
          outdatedness_reason = rep.outdatedness_reason
          if outdatedness_reason
            puts "  is outdated: #{outdatedness_reason[:type]} (#{outdatedness_reason[:description]})"
          else
            puts "  is not outdated"
          end
        end
        puts
      end

      # Print layouts
      puts '=== Layouts'
      puts
      layouts.each do |layout|
        puts "layout #{layout.identifier}"
      end
    end

  end

end