module Solargraph::Parser::Legacy::ClassMethods

def chain *args
  NodeChainer.chain *args
end

def chain_string *args
  NodeChainer.load_string *args
end

def infer_literal_node_type node
  NodeMethods.infer_literal_node_type node
end

def inner_node_references name, top
  result = []
  if top.is_a?(AST::Node) && top.to_s.include?(":#{name}")
    result.push top if top.children.any? { |c| c.to_s == name }
    top.children.each { |c| result.concat inner_node_references(name, c) }
  end
  result
end

def is_ast_node? node
  node.is_a?(::Parser::AST::Node)
end

def map source
  NodeProcessor.process(source.node, Region.new(source: source))
end

def node_range node
  st = Position.new(node.loc.line, node.loc.column)
  en = Position.new(node.loc.last_line, node.loc.last_column)
  Range.new(st, en)
end

def parse code, filename = nil, line = 0
  buffer = ::Parser::Source::Buffer.new(filename, line)
  buffer.source = code
  parser.parse(buffer)
rescue ::Parser::SyntaxError => e
  raise Parser::SyntaxError, e.message
end

def parse_with_comments code, filename = nil
  buffer = ::Parser::Source::Buffer.new(filename, 0)
  buffer.source = code
  node = parser.parse(buffer)
  comments = CommentRipper.new(code, filename, 0).parse
  [node, comments]
rescue ::Parser::SyntaxError => e
  raise Parser::SyntaxError, e.message
end

def parser
  # @todo Consider setting an instance variable. We might not need to

  #   recreate the parser every time we use it.

  parser = ::Parser::CurrentRuby.new(FlawedBuilder.new)
  parser.diagnostics.all_errors_are_fatal = true
  parser.diagnostics.ignore_warnings      = true
  parser
end

def process_node *args
  Solargraph::Parser::NodeProcessor.process *args
end

def references source, name
  inner_node_references(name, source.node).map do |n|
    offset = Position.to_offset(source.code, NodeMethods.get_node_start_position(n))
    soff = source.code.index(name, offset)
    eoff = soff + name.length
    Location.new(
      source.filename,
      Range.new(
        Position.from_offset(source.code, soff),
        Position.from_offset(source.code, eoff)
      )
    )
  end
end

def returns_from node
  NodeMethods.returns_from(node)
end

def version
  parser.version
end