class PokemonController < ApplicationController
  before_action :load_pokemon, only: [:show, :embed]

  def index
    pokemon = Pokemon.order(Arel.sql("trainer_id IS NULL DESC")).
      order(trainer_id: :asc).
      order(box: :asc).
      order(slot: :asc).
      joins(:current).
      includes(:current).
      chunk do |p|
        if p.trainer_id.nil?
          -1
        else
          p.trainer_id
        end
      end

    @unaccounted = []

    begin
      if pokemon.peek.first == -1
        @unaccounted = pokemon.next.second
      end
    rescue StopIteration
      # There are no Pokémon, but that's fine.
    end

    @trainers = Trainer.order(id: :asc).all.map do |trainer|
      if trainer.id == pokemon.peek.first
        party = []

        boxes = (1..14).map do |i|
          {
            name: trainer.box_name(i),
            pokemon: [nil] * 30
          }
        end

        pokemon.next.second.chunk do |p|
          if p.box.nil?
            -1
          else
            p.box
          end
        end.each do |box, pokes|
          if box == -1
            party = pokes
          else
            boxes[box-1][:pokemon] = (0..29).map do |i|
              if not pokes.empty? and (pokes.first.slot == i)
                pokes.shift
              else
                nil
              end
            end
          end
        end

        [trainer, party, boxes]
      else
        nil
      end
    end.compact
  end

  def show
  end

  def show_revision
    @revision = Revision.
      where(
        sequential_id: params[:revision_id],
        pokemon: { uuid: params[:id] }
      ).includes(
        :species, :item, :move_1, :move_2, :move_3, :move_4,
        pokemon: [:trainer, :location]
      ).first

    @pokemon = @revision.pokemon

    render :show
  end

  def embed
    render layout: false
  end

  protected
    def load_pokemon
      @pokemon = Pokemon.includes(
          current: [
            :species, :item, :move_1, :move_2, :move_3, :move_4,
            pokemon: [:trainer, :location]]
        ).find_by_uuid! params[:id]

      @revision = @pokemon.current
    end
end