module RecentRuby

# File lib/recent_ruby.rb, line 73
def check_eol(version, version_base_url)
  puts "Downloading details for #{version}..."
  details = http_get("#{version_base_url}#{version}")
  puts 'Checking EOL status...'

  return unless details =~ / warn_eol /
  puts "EOL warning found for #{version}!"
  exit 1
end

# File lib/recent_ruby.rb, line 83
def compare_versions(version, latest, minor)
  puts 'Comparing version numbers...'
  return if version == latest
  puts "Current version is #{version}, but the latest patch release for #{minor.join('.')} is #{latest}!"
  exit 1
end

# File lib/recent_ruby.rb, line 56
def get_rubies(versions_url)
  puts 'Downloading latest list of Rubies from Github...'
  JSON.parse(http_get(versions_url))
end

# File lib/recent_ruby.rb, line 12
def http_get(url)
  uri = URI(url)
  Net::HTTP.start(uri.host, uri.port,
                  use_ssl: uri.scheme == 'https') do |http|
    request = Net::HTTP::Get.new uri
    response = http.request request
    if response.code != '200'
      puts "Error: received HTTP #{response.code} response from Github:\n\n#{response.body}"
      exit(2)
    end
    response.body
  end
end

# File lib/recent_ruby.rb, line 61
def latest_minor_version(rubies, minor)
  minor_rubies = rubies.map { |n| n['name'] }.select do |n|
    n =~ /^\d+\.\d+\.\d+(-p\d+)?$/ &&
      n.split('.')[0, 2] == minor
  end

  minor_rubies.max_by do |ruby|
    a, b, c, d = *ruby.sub('-p', '.').split('.').map(&:to_i)
    [a, b, c, d || -1]
  end
end

# File lib/recent_ruby.rb, line 36
def parse_gemfile(gemfile)
  ast = Parser::CurrentRuby.parse(File.read(gemfile))
  xml = RecentRuby::XMLAST.new(ast)
  version = xml.xpath(VERSION_XPATH)&.first&.value
  unless version
    puts 'Unable to find ruby version in gemfile.'
    exit(1)
  end

  patchlevel = xml.xpath(PATCHLEVEL_VALUE_XPATH)&.first&.value
  version += "-p#{patchlevel}" if patchlevel
  version
end

# File lib/recent_ruby.rb, line 26
def validate_args(gemfile, version)
  if gemfile && version
    puts 'Please supply only one argument. Run with -h for more information.'
    exit(1)
  elsif !gemfile && !version
    puts 'Please supply either a gemfile path or a version string. Run with -h for more information.'
    exit(1)
  end
end

# File lib/recent_ruby.rb, line 50
def validate_mri_version(version)
  return if version =~ /^(\d+\.\d+\.\d+(-p\d+)?)$/
  puts 'Only stable release MRI version strings are currently supported. (e.g. 2.3.1 or 2.3.1-p12)'
  exit(1)
end