class SyntaxSuggest::LeftRightLexCount

# File lib/syntax_suggest/left_right_lex_count.rb, line 25
def initialize
  @kw_count = 0
  @end_count = 0

  @count_for_char = {
    "{" => 0,
    "}" => 0,
    "[" => 0,
    "]" => 0,
    "(" => 0,
    ")" => 0,
    "|" => 0
  }
end

# File lib/syntax_suggest/left_right_lex_count.rb, line 44
def count_end
  @end_count += 1
end

# File lib/syntax_suggest/left_right_lex_count.rb, line 101
def count_for_char(char)
  @count_for_char[char]
end

# File lib/syntax_suggest/left_right_lex_count.rb, line 40
def count_kw
  @kw_count += 1
end

# File lib/syntax_suggest/left_right_lex_count.rb, line 58
def count_lex(lex)
  case lex.type
  when :on_tstring_content
    # ^^^
    # Means it's a string or a symbol `"{"` rather than being
    # part of a data structure (like a hash) `{ a: b }`
    # ignore it.
  when :on_words_beg, :on_symbos_beg, :on_qwords_beg,
       :on_qsymbols_beg, :on_regexp_beg, :on_tstring_beg
    # ^^^
    # Handle shorthand syntaxes like `%Q{ i am a string }`
    #
    # The start token will be the full thing `%Q{` but we
    # need to count it as if it's a `{`. Any token
    # can be used
    char = lex.token[-1]
    @count_for_char[char] += 1 if @count_for_char.key?(char)
  when :on_embexpr_beg
    # ^^^
    # Embedded string expressions like `"#{foo} <-embed"`
    # are parsed with chars:
    #
    # `#{` as :on_embexpr_beg
    #  `}` as :on_embexpr_end
    #
    # We cannot ignore both :on_emb_expr_beg and :on_embexpr_end
    # because sometimes the lexer thinks something is an embed
    # string end, when it is not like `lol = }` (no clue why).
    #
    # When we see `#{` count it as a `{` or we will
    # have a mis-match count.
    #
    case lex.token
    when "\#{"
      @count_for_char["{"] += 1
    end
  else
    @end_count += 1 if lex.is_end?
    @kw_count += 1 if lex.is_kw?
    @count_for_char[lex.token] += 1 if @count_for_char.key?(lex.token)
  end
end

# File lib/syntax_suggest/left_right_lex_count.rb, line 110
def missing
  out = missing_pairs
  out << missing_pipe
  out << missing_keyword_end
  out.compact!
  out
end

# File lib/syntax_suggest/left_right_lex_count.rb, line 148
        def missing_keyword_end
  case @kw_count <=> @end_count
  when 1
    "end"
  when 0
    nil
  when -1
    "keyword"
  end
end

# File lib/syntax_suggest/left_right_lex_count.rb, line 131
        def missing_pairs
  PAIRS.map do |(left, right)|
    case @count_for_char[left] <=> @count_for_char[right]
    when 1
      right
    when 0
      nil
    when -1
      left
    end
  end
end

# File lib/syntax_suggest/left_right_lex_count.rb, line 162
        def missing_pipe
  if @count_for_char["|"].odd?
    "|"
  end
end