class Solargraph::Shell

def prepare
  cache_dir = File.join(Dir.home, '.solargraph', 'cache')
  version_dir = File.join(cache_dir, '2.0.0')
  unless File.exist?(version_dir) or options[:force]
    FileUtils.mkdir_p cache_dir
    puts 'Downloading 2.0.0...'
    Net::HTTP.start(options[:host]) do |http|
        resp = http.get("/2.0.0.tar.gz")
        open(File.join(cache_dir, '2.0.0.tar.gz'), "wb") do |file|
            file.write(resp.body)
        end
        puts 'Uncompressing archives...'
        FileUtils.rm_rf version_dir if File.exist?(version_dir)
        tar_extract = Gem::Package::TarReader.new(Zlib::GzipReader.open(File.join(cache_dir, '2.0.0.tar.gz')))
        tar_extract.rewind
        tar_extract.each do |entry|
          if entry.directory?
            FileUtils.mkdir_p File.join(cache_dir, entry.full_name)
          else
            FileUtils.mkdir_p File.join(cache_dir, File.dirname(entry.full_name))
            File.open(File.join(cache_dir, entry.full_name), 'wb') do |f|
              f << entry.read
            end
          end
        end
        tar_extract.close
        FileUtils.rm File.join(cache_dir, '2.0.0.tar.gz')
        puts 'Done.'
    end
  end
end

def server
  Solargraph::Server.set :port, options[:port]
  Solargraph::Server.set :views, options[:views] unless options[:views].nil?
  Solargraph::Server.set :public_folder, options[:files] unless options[:files].nil?
  Solargraph::Server.run!
end

def suggest(*filenames)
  # HACK: The ARGV array needs to be manipulated for ARGF.read to work

  ARGV.clear
  ARGV.concat filenames
  text = ARGF.read
  filename = options[:filename] || filenames[0]
  begin
    code_map = CodeMap.new(code: text, filename: filename)
    offset = code_map.get_offset(options[:line], options[:column])
    sugg = code_map.suggest_at(offset, with_snippets: true, filtered: true)
    result = { "status" => "ok", "suggestions" => sugg }.to_json
    STDOUT.puts result
  rescue Exception => e
    STDERR.puts e
    STDERR.puts e.backtrace.join("\n")
    #result = { "status" => "err", "message" => e.message }.to_json

    result = { "status" => "err", "message" => e.message + "\n" + e.backtrace.join("\n") }.to_json
    STDOUT.puts result
  end
end