class RBS::Collection::Config::Lockfile

def self.from_lockfile(lockfile_path:, data:)
  path = Pathname(data["path"])
  if p = data["gemfile_lock_path"]
    gemfile_lock_path = Pathname(p)
  end
  lockfile = Lockfile.new(lockfile_path: lockfile_path, path: path, gemfile_lock_path: gemfile_lock_path)
  if sources = data["sources"]
    sources.each do |src|
      git = Sources::Git.new(
        name: src["name"],
        revision: src["revision"],
        remote: src["remote"],
        repo_dir: src["repo_dir"]
      )
      lockfile.sources[git.name] = git
    end
  end
  if gems = data["gems"]
    gems.each do |gem|
      src = gem["source"]
      source = Sources.from_config_entry(src, base_directory: lockfile_path.dirname)
      lockfile.gems[gem["name"]] = {
        name: gem["name"],
        version: gem["version"],
        source: source
      }
    end
  end
  lockfile
end

def check_rbs_availability!
  raise CollectionNotAvailable unless fullpath.exist?
  gems.each_value do |gem|
    source = gem[:source]
    case source
    when Sources::Git
      meta_path = fullpath.join(gem[:name], gem[:version], Sources::Git::METADATA_FILENAME)
      raise CollectionNotAvailable unless meta_path.exist?
      raise CollectionNotAvailable unless library_data(gem) == YAML.load(meta_path.read)
    when Sources::Local
      raise CollectionNotAvailable unless fullpath.join(gem[:name], gem[:version]).symlink?
    end
  end
end

def each_source(&block)
  if block
    sources.each_value(&block)
    yield Sources::Rubygems.instance
    yield Sources::Stdlib.instance
  else
    enum_for :each_source
  end
end

def fullpath
  lockfile_dir + path
end

def gemfile_lock_fullpath
  if gemfile_lock_path
    lockfile_dir + gemfile_lock_path
  end
end

def initialize(lockfile_path:, path:, gemfile_lock_path:)
  @lockfile_path = lockfile_path
  @lockfile_dir = lockfile_path.parent
  @path = path
  @gemfile_lock_path = gemfile_lock_path
  @sources = {}
  @gems = {}
end

def library_data(lib)
  {
    "name" => lib[:name],
    "version" => lib[:version],
    "source" => lib[:source].to_lockfile
  }
end

def to_lockfile
  # @type var data: lockfile_data
  data = {
    "sources" => sources.each_value.sort_by {|s| s.name }.map {|source| source.to_lockfile },
    "path" => path.to_s,
    "gems" => gems.each_value.sort_by {|g| g[:name] }.map {|hash| library_data(hash) },
    "gemfile_lock_path" => gemfile_lock_path.to_s
  }
  data.delete("sources") if sources.empty?
  data.delete("gems") if gems.empty?
  data
end