module TimelineHelper

  def month_pixels
     300
  end
  def day_pixels
    month_pixels / 30
  end
  def max_pixels
    (month_pixels * 3 ) / day_pixels
  end
  def started_days(member)
    return 0 unless member.arriving
    return 0 if member.arriving < Date.today.at_beginning_of_month
    distance = (member.arriving - Date.today.at_beginning_of_month).to_i
    distance > max_pixels ? max_pixels : distance
  end
  def left_max
    Date.today.at_beginning_of_month + 3.months
  end
  def stay_days(member)
    return 0 unless member.leaving
    start = member.arriving
    start = Date.today.at_beginning_of_month if member.arriving < Date.today.at_beginning_of_month
    distance = ( member.leaving - member.arriving ).to_i
    distance > max_pixels ? max_pixels : distance
  end
  def weekly
    data = {}
    week = 0
    while( week < 13 ) do
      data[ week ] = 0
      start_week = Date.today.at_beginning_of_month + week.weeks
      end_week = Date.today.at_beginning_of_month + (week + 1).weeks
      @members.each do |mem|
        next unless mem.arriving
        next unless mem.leaving
        next if mem.arriving > start_week
        next if mem.leaving < end_week
        data[ week ] += 1
      end
      week += 1
    end
    puts data
    data
  end
  def bg_for(week)
    case week % 5
    when 0
      "bg-cyan-50"
    when 1
      "bg-cyan-100"
    when 2
      "bg-cyan-200"
    when 3
      "bg-cyan-300"
    when 4
      "bg-cyan-400"
    end
  end
  def small_date(date)
    date.strftime("%-d.%-m")
  end
end