require 'socket'
require 'yaml/store'

config = YAML::Store.new "config.store"
config.transaction do
  $name = config["name"]
  $password = config["password"]
  $host = config["host"]
  $port = config["port"]
  $lookahead = config["lookahead"].to_i
end

$dirs = Queue.new
$ticks = 0

def connect(host, port)
  $sock = TCPSocket.new(host, port)
  # join($name,$password)
  while line = $sock.gets
    parse(line)
  end
end

def join(name, password)
  send("join", name, password)
end

def parse(message)
  parts = message.split('|')
  case parts[0].strip
  when "error"
    puts "error occured " + parts[1]

  when "game"
    puts "#{Time.now.strftime('%M%S%L')}: #{message}"
    $gameW = parts[1].to_i
    $gameH = parts[2].to_i
    $id = parts[3].to_i
    initmap()
  when "pos"
    $map[parts[2].to_i][parts[3].to_i] = parts[1].to_i
    # puts $map
    if parts[1].to_i === $id
      # store our position
      $myX = parts[2].to_i
      $myY = parts[3].to_i
    end
  when "tick"
    puts "#{Time.now.strftime('%M%S%L')}: #{message}"
    puts "tick took: #{Time.now.strftime('%M%S%L').to_i - $lasttick}"
    $lasttick = Time.now.strftime('%M%S%L').to_i
    decide()
  when "die"
    puts "#{Time.now.strftime('%M%S%L')}: #{message}"
    parts.drop(1).each { |player| cleanup(player) }
  when "message"
    puts "#{Time.now.strftime('%M%S%L')}: #{message}"
  when "win", "lose"
    puts "#{Time.now.strftime('%M%S%L')}: #{message}"
    reset()
  when "motd"
    puts "#{Time.now.strftime('%M%S%L')}: #{message}"
    join($name, $password)
  end

end

def cleanup(player)
  id = player.to_i
  puts "Removing tiles from player ##{id}"
  $dead.append(id)
  # $map.each { |row| row.each { |element| if element == id then element = -1 end}}

end

$tries = 0

def check_front

  # puts "#{$direction} at #{$myX},#{$myY} - try: #{$tries}"
  case $direction
  when "up"
    value = $map[overflow($myX, $gameW)][overflow($myY - 1, $gameH)]
  when "down"
    value = $map[overflow($myX, $gameW)][overflow($myY + 1, $gameH)]
  when "left"
    value = $map[overflow($myX - 1, $gameW)][overflow($myY, $gameH)]
  when "right"
    value = $map[overflow($myX + 1, $gameW)][overflow($myY, $gameH)]
  end
  $tries = $tries + 1
  puts "check_front: #{value}"
  return value
end

def overflow(new, max)
  if new >= max
    return 0
  end
  if new < 0
    return max - 1
  end
  new
end

def turned_position(turn_direction)
  dir = 0
  front = 0
  case turn_direction
  when "left"
    dir = -1
  when "right"
    dir = 1
  when "front"
    front = 1
    dir = 0
  end

  case $direction
  when "up"
    return overflow($myX + dir, $gameW), overflow($myY - front, $gameH)
  when "down"
    return overflow($myX - dir, $gameW), overflow($myY + front, $gameH)
  when "left"
    return overflow($myX - front, $gameW), overflow($myY - dir, $gameH)
  when "right"
    return overflow($myX + front, $gameW), overflow($myY + dir, $gameH)
  end
end

def new_direction
  case $direction
  when "up"
    "right"
  when "down"
    "left"
  when "left"
    "up"
  when "right"
    "down"
  end
end

def turn_direction(dir)
  case $direction
  when "up"
    if dir == "right"
      "right"
    else
      "left"
    end
  when "down"
    if dir == "right"
      "left"
    else
      "right"
    end
  when "left"
    if dir == "right"
      "up"
    else
      "down"
    end
  when "right"
    if dir == "right"
      "down"
    else
      "up"
    end
  end
end

def check_area(direction)
  $fillmap = Array.new($gameH) { Array.new($gameW) { -1 } }

  (0...$gameH).each do |i|
    (0...$gameW).each { |j| $fillmap[i][j] = $map[i][j] }
  end
  x, y = turned_position(direction)
  fill(x, y, 0)
end

def decide()
  $ticks = $ticks + 1

  lastdirection = $direction


  if $dirs.length > 0
    puts "in queue"
    $direction = $dirs.pop
  
    if check_front > -1 && !$dead.include?(check_front)
      #chat("You crossed my Plans!")
      $direction = lastdirection
      $dirs.clear()
    else
      send("move", $direction)
      return
    end
  end


  # check area front
  front = check_area("front")
  # check area left
  left = check_area("left")
  # check area right
  right = check_area("right")

  if($ticks < 30)

    if left > front && left > right
      puts "#{left} > #{front} && #{left} > #{right} -> left"
      $direction = turn_direction("left")
      $dirs << "left"
      puts "qued left"
    else
      if right > front && right > left
        puts "#{right} > #{front} && #{right} > #{left} -> right"
        $direction = turn_direction("right")
        $dirs << "right"
        puts "qued right"
      end
    end
  else

    if check_front > -1 && !$dead.include?(check_front) || check_area("front") < 10
    
       if left > right
         $direction = turn_direction("left")
       else
         if left == right
           case $lastturn
           when "left"
             $direction = turn_direction("right")
             $lastturn = "right"
             $dirs << "right"
           when "right"
             $direction = turn_direction("left")
             $lastturn = "left"
             $dirs << "left"
           end
         else
           $direction = turn_direction("right")
         end
       end
    
       puts "#{left} > #{right}: turned #{$direction}"
     end
   end
   #$direction = new_direction()
   #if $tries > 4
   #  break
   #end

  if check_front > -1 && !$dead.include?(check_front)
    chat("To honor the Fallen")
    $direction = lastdirection
  end

  send("move", $direction)
end

# $tries = 0
# while check_front > -1 && !$dead.include?(check_front)

def chat(message)
  send("chat", message)
end

def reset() end

def send(msg, *param)

  if param.length > 0
    snd = "#{msg}|#{param.join("|")}"
  else
    snd = msg
  end
  $sock.puts(snd)
  puts("#{Time.now.strftime('%M%S%L')}: #{snd}")
end

def initmap()
  $map = Array.new($gameH) { Array.new($gameW) { -1 } }
  $direction = "up"
  $lastturn = "left"
  $dead = Array.new(0)
  $lasttick = 0
  chat("Rock and Stone!")
end

def fill(x, y, depth)
  x = overflow(x, $gameW)
  y = overflow(y, $gameH)

  tile = $fillmap[x][y]

  if depth > $lookahead
    return 0
  end
  if tile > -1 && !$dead.include?(tile)
    return 0
  end

  $fillmap[x][y] = 42 # mark as visited
  sum = 1
  sum += fill(x - 1, y, depth + 1)
  sum += fill(x + 1, y, depth + 1)
  sum += fill(x, y - 1, depth + 1)
  sum += fill(x, y + 1, depth + 1)

  return sum
end

connect($host, $port)