# frozen_string_literal: true

module RuboCop
  module Cop
    module Style
      # This cop checks that the closing brace in a method definition is either
      # on the same line as the last method parameter, or a new line.
      #
      # When using the `symmetrical` (default) style:
      #
      # If a method definition's opening brace is on the same line as the
      # first parameter of the definition, then the closing brace should be
      # on the same line as the last parameter of the definition.
      #
      # If an method definition's opening brace is on the line above the first
      # parameter of the definition, then the closing brace should be on the
      # line below the last parameter of the definition.
      #
      # When using the `new_line` style:
      #
      # The closing brace of a multi-line method definition must be on the line
      # after the last parameter of the definition.
      #
      # When using the `same_line` style:
      #
      # The closing brace of a multi-line method definition must be on the same
      # line as the last parameter of the definition.
      #
      # @example
      #
      #     # symmetrical: bad
      #     # new_line: good
      #     # same_line: bad
      #     def foo(a,
      #       b
      #     )
      #
      #     # symmetrical: bad
      #     # new_line: bad
      #     # same_line: good
      #     def foo(
      #       a,
      #       b)
      #
      #     # symmetrical: good
      #     # new_line: bad
      #     # same_line: good
      #     def foo(a,
      #       b)
      #
      #     # symmetrical: good
      #     # new_line: good
      #     # same_line: bad
      #     def foo(
      #       a,
      #       b
      #     )
      class MultilineMethodDefinitionBraceLayout < Cop
        include OnMethodDef
        include MultilineLiteralBraceLayout

        SAME_LINE_MESSAGE = 'Closing method definition brace must be on the ' \
          'same line as the last parameter when opening brace is on the same ' \
          'line as the first parameter.'.freeze

        NEW_LINE_MESSAGE = 'Closing method definition brace must be on the ' \
          'line after the last parameter when opening brace is on a separate ' \
          'line from the first parameter.'.freeze

        ALWAYS_NEW_LINE_MESSAGE = 'Closing method definition brace must be ' \
          'on the line after the last parameter.'.freeze

        ALWAYS_SAME_LINE_MESSAGE = 'Closing method definition brace must be ' \
          'on the same line as the last parameter.'.freeze

        def on_method_def(_node, _method_name, args, _body)
          check_brace_layout(args)
        end
      end
    end
  end
end