module RBS
  class Diff
    @type_name: TypeName
    @library_options: RBS::CLI::LibraryOptions
    @after_path: Array[String]
    @before_path: Array[String]

    def initialize: (
      type_name: TypeName,
      library_options: RBS::CLI::LibraryOptions,
      ?after_path: Array[String],
      ?before_path: Array[String]
    ) -> void

    def each_diff: () { (String before, String after) -> void } -> void

    private def each_diff_by: (Symbol kind, Hash[::Symbol, Definition::Method] before_methods, Hash[::Symbol, Definition::Method] after_methods) { (String before, String after) -> void } -> void
    private def build_methods: (Array[String] path) -> [ Hash[::Symbol, Definition::Method], Hash[::Symbol, Definition::Method] , Hash[Symbol, Constant]]
    private def build_env: (Array[String] path) -> Environment
    private def build_builder: (Environment env) -> DefinitionBuilder
    private def definition_method_to_s: (Symbol key, Symbol kind, Definition::Method definition_method) -> String?
    private def each_diff_methods: (Symbol kind, Hash[Symbol, Definition::Method], Hash[Symbol, Definition::Method]) { (String before, String after) -> void } -> void
    private def each_diff_constants: (Hash[Symbol, Constant] before_constants, Hash[Symbol, Constant] after_constants) { (String before, String after) -> void } -> void
    private def constant_to_s: (Constant?) -> String
  end
end