class Slapp::Package
  include Slapp::Helpers

  attr_accessor :data

  def initialize(data, slackware_version)
    @data = data
    @slackware_version = slackware_version

    @name_match = regex('name').match(data)
    @location_match = regex('location').match(data)
    @size_match = data.scan regex('size')
    @description_match = regex('description').match(data)
  end

  def name
    @name_match[3]
  end

  def package_name
    @name_match[2]
  end

  def file_name
    @name_match[1]
  end

  def version
    @name_match[4]
  end

  def arch
    @name_match[5]
  end

  def location
    @location_match[1]
  end

  def path
    File.join "/slackware/slackware-#{@slackware_version}", location, file_name
  end

  def build
    @name_match[5]
  end

  def size_uncompressed
    convert_to_bytes @size_match.flatten.last
  end

  def size_compressed
    convert_to_bytes @size_match.flatten.first
  end

  def description
    original_description
      .gsub(/(\S)\n(\S)/, '\1 \2')
      .gsub(/\n\n\s/, "\n\n")
      .strip
  end

  def original_description
    if name == 'aalib'
      parsed_description.split("\n").map { |line|
        line[0..34].strip
      }.join("\n").strip
    else
      parsed_description
        .gsub(/\n\n /, "\n\n")
        .gsub(/\n /, "\n")
        .strip
    end
  end

  def summary
    parsed_description
      .slice(/^(.+)\n/)
      .strip
  end

  def to_hash
    {
      file_name: file_name,
      package_name: package_name,
      name: name,
      version: version,
      arch: arch,
      build: build,
      size: {
        compressed: size_compressed,
        uncompressed: size_uncompressed
      },
      location: location,
      path: path,
      description: description,
      original_description: original_description,
      summary: summary
    }
  end

private

  def parsed_description
    @description_match[1].gsub(/^#{name}:/, "")
  end

  def regex(type)
    regexes[type.to_sym]
  end

  def regexes
    {
      name: /PACKAGE NAME:\s+(((.+)-(.+)-(.+)-(.+))\.t\wz)/,
      location: /PACKAGE LOCATION:\s+\.([\S]+)/,
      size: /PACKAGE SIZE\s+\(\w+\):\s+(.+)/,
      description: /PACKAGE DESCRIPTION:\s+(.+)/m
    }
  end

end