class KPM::Sha1Checker

def self.from_file(sha1_file, logger = nil)
  Sha1Checker.new(sha1_file, logger)
end

def add_or_modify_entry!(coordinates, remote_sha1)
  sha1_cache[coordinates] = remote_sha1
  save!
end

def all_sha1
  sha1_cache
end

def artifact_info(coordinates)
  nexus_cache[coordinates]
end

def cache_artifact_info(coordinates_with_maybe_latest, artifact_info)
  return if artifact_info.nil?
  if coordinates_with_maybe_latest.end_with?('LATEST')
    return nil if artifact_info[:version].nil?
    coordinates = coordinates_with_maybe_latest.gsub(/LATEST$/, artifact_info[:version])
  else
    coordinates = coordinates_with_maybe_latest
  end
  # See BaseArtifact#artifact_info
  nexus_keys = %i[sha1 version repository_path is_tgz]
  nexus_cache[coordinates] = artifact_info.select { |key, _| nexus_keys.include? key }
  save!
end

def cache_killbill_info(version, dependencies)
  killbill_cache[version] = dependencies
  save!
end

def create_sha1_directory_if_missing
  sha1_dir = Pathname(@sha1_file).dirname
  FileUtils.mkdir_p(sha1_dir) unless File.directory?(sha1_dir)
end

def init!
  unless File.exist?(@sha1_file)
    create_sha1_directory_if_missing
    init_config = {}
    init_config['sha1'] = {}
    File.open(@sha1_file, 'w') do |file|
      file.write(init_config.to_yaml)
    end
  end
  reload!
end

def initialize(sha1_file, logger = nil)
  @sha1_file = sha1_file
  init!
  if logger.nil?
    @logger = Logger.new(STDOUT)
    @logger.level = Logger::INFO
  else
    @logger = logger
  end
end

def killbill_cache
  @sha1_config['killbill'] ||= {}
end

def killbill_info(version)
  killbill_cache[version]
end

def nexus_cache
  @sha1_config['nexus'] ||= {}
end

def reload!
  @sha1_config = YAML.load_file(@sha1_file)
end

def remove_entry!(coordinates)
  sha1_cache.delete(coordinates)
  nexus_cache.delete(coordinates)
  save!
end

def save!
  Dir.mktmpdir do |tmp_destination_dir|
    tmp_file = File.join(tmp_destination_dir, File.basename(@sha1_file))
    File.open(tmp_file, 'w') do |file|
      file.write(@sha1_config.to_yaml)
    end
    FileUtils.copy(tmp_file, @sha1_file)
  end
  reload!
end

def sha1(coordinates)
  sha1_cache[coordinates]
end

def sha1_cache
  @sha1_config['sha1'] ||= {}
end