# frozen_string_literal: true

require 'socket'
require 'async'
require 'sequel'
require 'openssl'

# Set up the database
DB = Sequel.sqlite # In-memory database
processors = DB[:processors]

listen_ip = ENV['LISTEN_IP'] || '0.0.0.0'
listen_port = ENV['LISTEN_PORT'] || 3080

server = TCPServer.new(listen_ip, listen_port)

# This hash will store the connections to the consumers
connections = {}

def create_socket(ip, port) # rubocop:disable Metrics/MethodLength
  # If the IP address is set to "loopback", replace it with the actual loopback IP address
  ip = '127.0.0.1' if ip.downcase == 'loopback'

  if ip =~ Resolv::IPv4::Regex
    # If the IP address is an IPv4 address, create an unencrypted socket
    TCPSocket.new(ip, port)
  else
    # If the IP address is a domain name, create an SSL socket
    ssl_context = OpenSSL::SSL::SSLContext.new
    ssl_context.verify_mode = OpenSSL::SSL::VERIFY_PEER

    tcp_socket = TCPSocket.new(ip, port)
    ssl_socket = OpenSSL::SSL::SSLSocket.new(tcp_socket, ssl_context)
    ssl_socket.sync_close = true
    ssl_socket.connect
    ssl_socket
  end
end

Async do
  loop do
    Async::Task.new do
      client = server.accept

      begin
        while (line = client.gets)
          # Here we handle each line of input from the client
          handle_input(line, connections)
        end
      ensure
        # This code will be executed when the fiber is finished, regardless of whether an exception was raised
        client.close
        Async::Task.current.stop # Stop the current task
      end
    end
  end
end

def handle_input(line, connections) # rubocop:disable Metrics/AbcSize, Metrics/MethodLength
  # Split the line into command and args
  command, *args = line.split

  case command
  when 'NEW_PROCESSOR'
    # Handle new processor registration
    id, domain, port = args

    # Create a new connection to the processor
    Async do
      processor_connection = create_socket(domain, port)

      # Store the connection in the hash
      connections[id] = processor_connection

      # Add the processor to the database
      processors.insert(consumer_id: id, ip: domain, port: port)
    end

  when 'REQUEST'
    # Handle request from orchestrator
    consumer_id, request_type, pcap_chunk_id = args

    # Get the connection for this consumer
    connection = connections[consumer_id]

    # Send the request to the consumer
    connection.puts "REQUEST #{request_type} #{pcap_chunk_id}"

  when 'UPSTATE'
    # Handle upstate from consumer
    consumer_id, state, pcap_chunk_id = args

    # Do something with the state update...
    # For now, we'll just print it out
    puts "Consumer #{consumer_id} is now #{state} for chunk #{pcap_chunk_id}"

  when 'FINISHED'
    # Handle finished from consumer
    consumer_id, pcap_chunk_id = args

    # Do something with the finished message...
    # For now, we'll just print it out
    puts "Consumer #{consumer_id} has finished chunk #{pcap_chunk_id}"

  when 'CHANGE'
    # Handle change from orchestrator
    consumer_id, state, urgency = args

    # Get the connection for this consumer
    connection = connections[consumer_id]

    # Send the change to the consumer
    connection.puts "CHANGE #{state} #{urgency}"

  when 'SHUTDOWN'
    # Handle shutdown from orchestrator
    consumer_id, urgency = args

    # Get the connection for this consumer
    connection = connections[consumer_id]

    # Send the shutdown to the consumer
    connection.puts "SHUTDOWN #{urgency}"

  else
    puts "Unknown command: #{command}"
  end
end