# Copyright (c) 2020 Jerome Arbez-Gindre
# frozen_string_literal: true

module DefMastership
  # set of regexp of added asciidoctor constructions
  module DMRegexp
    SINGLE_LINE_COMMENT = %r{^//[^/]}.freeze

    MULTI_LINE_COMMENT_DELIM = %r{^////\s*$}.freeze

    DEF_BEFORE_REF = <<~'BEF'
      ^\s*
      \[\s*define\s*,
      \s*(?<type>[\w:_-]+)\s*,
      \s*
    BEF

    DEF_AFTER_REF = <<~'AFT'
      \s*
      (,\s*\[\s*(?<labels>.*?)\s*\])?\s*\]
    AFT

    DEF_VERSION_AND_CHECKSUM = '(\((?<explicit_version>[^~]+)?(?<explicit_checksum>~[[:alnum:]]+)?\))?'

    DEFINITION = Regexp.new(
      "#{DEF_BEFORE_REF}(?<reference>[\\w:_-]+)#{DEF_VERSION_AND_CHECKSUM}#{DEF_AFTER_REF}",
      Regexp::EXTENDED
    )

    VARIABLE_DEF = /^\s*:(?<varname>[\w:_-]+):\s*
                   \s*(?<value>\S.*\S)\s*$/x.freeze

    VARIABLE_USE = /{(?<varname>[\w:_-]+)}/x.freeze

    EREF_CONFIG = /^\s*:eref-(?<refname>[\w:_-]+)-(?<symb>prefix|url):\s*
                   \s*(?<value>\S.*\S)\s*/x.freeze
    EREF_DEF = /^\s*
               defs:eref\[
               \s*(?<refname>[\w:_-]+)\s*,
               \s*\[(?<extrefs>[^\]]+)\]\s*\]/x.freeze
    BLOCK = /^--\s*$/.freeze
    LITERAL_BLOCK = /^\.\.\.\.\s*$/.freeze

    IREF_DEF_BEF = 'defs:iref\[\s*'
    IREF_DEF_AFT = '\s*\]'
    IREF_DEF = Regexp.new(
      "#{IREF_DEF_BEF}(?<intref>[\\w:_-]+)#{IREF_DEF_AFT}",
      Regexp::EXTENDED
    )

    ATTR_CONFIG = /\s*:attr-(?<attr>[\w:_-]+)-prefix:
                      \s+(?<prefix>.+?)\s*$/x.freeze
    ATTR_SET = /\s*
                defs:attribute\[
                \s*(?<attr>[\w:_-]+)\s*,
                \s*(?<value>.+?)\s*\]/x.freeze

    EMPTY_LINE = /^\s*$/.freeze

    WHATEVER = //.freeze

    INCLUDE_KEYWORD  = '\binclude::'
    INCLUDE_PATH     = '(?<path>.*/)?'
    INCLUDE_FILENAME = '(?<filename>[^\\/]+)'
    INCLUDE_OPTIONS  = '\[(?<options>[\]]*)\]'

    INCLUDE = Regexp.new(
      INCLUDE_KEYWORD + INCLUDE_PATH + INCLUDE_FILENAME + INCLUDE_OPTIONS,
      Regexp::EXTENDED
    )

    public_constant :SINGLE_LINE_COMMENT,
                    :MULTI_LINE_COMMENT_DELIM,
                    :DEF_BEFORE_REF,
                    :DEF_AFTER_REF,
                    :DEFINITION,
                    :VARIABLE_DEF,
                    :VARIABLE_USE,
                    :EREF_CONFIG,
                    :EREF_DEF,
                    :BLOCK,
                    :LITERAL_BLOCK,
                    :IREF_DEF_BEF,
                    :IREF_DEF_AFT,
                    :IREF_DEF,
                    :ATTR_CONFIG,
                    :ATTR_SET,
                    :EMPTY_LINE,
                    :WHATEVER
  end
end