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#!/usr/bin/env ruby

$levels = []

%w(
  01-hub2 02-hub3
  03-switch3
).each do |file|
  require "./#{file}"
end

$level = $levels.shift

def help
  puts <<~EOF
    Commands:
      f {frame} {iface}: forward a frame to iface
      h: this help
      c: click on
      d: show the level description
      a: show the click frames and actions
      q: quit
  EOF
end

$instructions = []

def forward(frame, iface)
  $instructions << [frame, $clickframes[frame].to(iface)]
end

def clickactions
  puts "Click #{$click}:"

  puts "  Interfaces:"
  puts "    #{$level.interfaces.join(", ")}"

  puts "  Frames:"
  $clickframes.each do |id, frame|
    puts "    #{id}: #{frame.description} from Interface #{frame.iface}"
  end

  i = 1
  puts "  Actions:"
  $instructions.each do |instr|
    puts "    #{i}: Forward frame #{instr[0]} to interface #{instr[1].iface}"
  end
end

$click = 1

def click
  right = 0
  wrong = 0

  targetframes = []
  $clickframes.each do |id, frame|
    targetframes += $level.target(frame)
  end
  targetframes.flatten!

  $instructions.each do |id, frame|
    if targetframes.include?(frame)
      right += 1
      targetframes.delete(frame)
    else
      wrong += 1
    end
  end
  wrong += targetframes.count

  puts "#{right} out of #{right+wrong} correct"

  $instructions = []

  $level.click

  $click += 1
  if $click > $level.clicks
    $click = 1
    $level = $levels.shift
    if $level.nil?
      puts "Demo all done"
      exit 0
    end
    puts
    puts $level.description
    puts
  end

  $clickframes = $level.generate
  clickactions
end

def handle(cmd)
  case cmd[0]
  when ?h
    help
  when ?f
    args = cmd.split[1..]
    if args.count == 2
      forward(*args)
    else
      puts "f {frame} {iface}"
    end
  when ?d
    puts $level.description
  when ?a
    clickactions
  when ?c
    click
  when ?q
    exit 0
  end
end

puts $level.description
puts

$clickframes = $level.generate
clickactions

loop do
  print ">: "
  handle(gets.strip)
end