class Inspec::Resources::Shadow

def entries
  @lines.map do |line|
    params = parse_shadow_line(line)
    Shadow.new(@path, content: line,
               filters: "#{@filters} on entry user=#{params['user']}")
  end
end

def expiry_dates(filter_by = nil)
  filter_by.nil? ? map_data('expiry_date') : filter(expiry_date: filter_by)
end

def filter(hm = {})
  return self if hm.nil? || hm.empty?
  res = @params
  filters = ''
  hm.each do |attr, condition|
    condition = condition.to_s if condition.is_a? Integer
    filters += " #{attr} = #{condition.inspect}"
    res = res.find_all do |line|
      case line[attr.to_s]
      when condition
        true
      else
        false
      end
    end
  end
  content = res.map { |x| x.values.join(':') }.join("\n")
  Shadow.new(@path, content: content, filters: @filters + filters)
end

def inactive_days(filter_by = nil)
  filter_by.nil? ? map_data('inactive_days') : filter(inactive_days: filter_by)
end

def initialize(path = '/etc/shadow', opts = nil)
  opts ||= {}
  @path = path || '/etc/shadow'
  @content = opts[:content] || inspec.file(@path).content
  @lines = @content.to_s.split("\n")
  @filters = opts[:filters] || ''
  @params = @lines.map { |l| parse_shadow_line(l) }
end

def last_changes(filter_by = nil)
  filter_by.nil? ? map_data('last_change') : filter(last_change: filter_by)
end

def map_data(id)
  @params.map { |x| x[id] }
end

def max_days(filter_by = nil)
  filter_by.nil? ? map_data('max_days') : filter(max_days: filter_by)
end

def min_days(filter_by = nil)
  filter_by.nil? ? map_data('min_days') : filter(min_days: filter_by)
end

def parse_shadow_line(line)
  x = line.split(':')
  {
    'user'          => x.at(0),
    'password'      => x.at(1),
    'last_change'   => x.at(2),
    'min_days'      => x.at(3),
    'max_days'      => x.at(4),
    'warn_days'     => x.at(5),
    'inactive_days' => x.at(6),
    'expiry_date'   => x.at(7),
    'reserved'      => x.at(8),
  }
end

def passwords(password = nil)
  password.nil? ? map_data('password') : filter(password: password)
end

def to_s
  f = @filters.empty? ? '' : ' with'+@filters
  "/etc/shadow#{f}"
end

def users(name = nil)
  name.nil? ? map_data('user') : filter(user: name)
end

def warn_days(filter_by = nil)
  filter_by.nil? ? map_data('warn_days') : filter(warn_days: filter_by)
end