require 'socket'
require './event_loop'

def handle_next_request(server, &handler)
  begin
    socket = server.accept_nonblock
    request = socket.gets.strip
    puts "Started handling req: #{request} #{Time.now}"
    handler.call(socket)
    add_callback { handle_next_request(server, &handler) }
  rescue IO::WaitReadable, Errno::EINTR
    add_callback { handle_next_request(server, &handler) }
  end
end

run_loop do
  server = TCPServer.new("127.0.0.1", 5678)
  puts "Listening on localhost:5678"
  handle_next_request(server) do |socket|
    set_timeout(5000) do
      puts "Responding 5 seconds later: #{Time.now}"
      socket.puts <<~HTTP
        HTTP/1.1 200 OK
        Content-Type: text/html

        Hii 👋
      HTTP
      socket.close
    end
    set_timeout(0) { puts "0ms later: #{Time.now}" }
    set_timeout(1500) { puts "1.5s later: #{Time.now}" }
  end
end