class Solargraph::LanguageServer::Message::TextDocument::Completion

def empty_result incomplete = false
  {
    isIncomplete: incomplete,
    items: []
  }
end

def process
  return set_error(ErrorCodes::REQUEST_CANCELLED, "cancelled by so many request") if host.has_pending_completions?
  line = params['position']['line']
  col = params['position']['character']
  begin
    completion = host.completions_at(params['textDocument']['uri'], line, col)
    items = []
    last_context = nil
    idx = -1
    completion.pins.each do |pin|
      idx += 1 if last_context != pin.context
      items.push pin.completion_item.merge({
        textEdit: {
          range: completion.range.to_hash,
          newText: pin.name.sub(/=$/, ' = ').sub(/:$/, ': ')
        },
        sortText: "#{idx.to_s.rjust(4, '0')}#{pin.name}"
      })
      items.last[:data][:uri] = params['textDocument']['uri']
      last_context = pin.context
    end
    set_result(
      isIncomplete: false,
      items: items
    )
  rescue InvalidOffsetError => e
    Logging.logger.info "Completion ignored invalid offset: #{params['textDocument']['uri']}, line #{line}, character #{col}"
    set_result empty_result
  end
rescue FileNotFoundError => e
  Logging.logger.warn "[#{e.class}] #{e.message}"
  Logging.logger.warn e.backtrace.join("\n")
  set_result empty_result
end