#!/usr/bin/env ruby
#
# From the book...
#   WRITE YOUR OWN ADVENTURE PROGRAMS FOR YOUR MICROCOMPUTER
#     J. TYLER & L. HOWARTH
#        USBORNE GAMEWRITER'S GUIDE
#        ISBN 0 86020 741 2
#
#  PORTED FROM BASIC TO RUBY BY
#    JOSHUA M. CLULOW
#      (josh@sysmgr.org)
#

class HauntedHouse

  def initialize
    @v  = 25 # number of verbs
    @w  = 36 # number of object words
    @g  = 18 # number of 'gettable' objects
    @rr = [ # DIM R$(63)
      "SE", "WE", "WE", "SWE", "WE", "WE", "SWE", "WS",
      "NS", "SE", "WE", "NW", "SE", "W", "NE", "NSW",
      "NS", "NS", "SE", "WE", "NWUD", "SE", "WSUD", "NS",
      "N", "NS", "NSE", "WE", "WE", "NSW", "NS", "NS",
      "S", "NSE", "NSW", "S", "NSUD", "N", "N", "NS",
      "NE", "NW", "NE", "W", "NSE", "WE", "W", "NS",
      "SE", "NSW", "E", "WE", "NW", "S", "SW", "NW",
      "NE", "NWE", "WE", "WE", "WE", "NWE", "NWE", "W"
    ]
    @dd = [ # DIM D$(63)
      "DARK CORNER", "OVERGROWN GARDEN", "BY LARGE WOODPILE",
      "YARD BY RUBBISH", "WEEDPATCH", "FOREST", "THICK FOREST",
      "BLASTED TREE", "CORNER OF HOUSE", "ENTRANCE TO KITCHEN",
      "KITCHEN & GRIMY COOKER", "SCULLERY DOOR",
      "ROOM WITH INCHES OF DUST", "REAR TURRET ROOM",
      "CLEARING BY HOUSE", "PATH", "SIDE OF HOUSE", "BACK OF HALLWAY",
      "DARK ALCOVE", "SMALL DARK ROOM", "BOTTOM OF SPIRAL STAIRCASE",
      "WIDE PASSAGE", "SLIPPERY STEPS", "CLIFFTOP", "NEAR CRUMBLING WALL",
      "GLOOMY PASSAGE", "POOL OF LIGHT", "IMPRESSIVE VAULTED HALLWAY",
      "HALL BY THICK WOODEN DOOR", "TROPHY ROOM",
      "CELLAR WITH BARRED WINDOW", "CLIFF PATH",
      "CUPBOARD WITH HANGING COAT", "FRONT HALL", "SITTING ROOM",
      "SECRET ROOM", "STEEP MARBLE STAIRS", "DINING ROOM",
      "DEEP CELLAR WITH COFFIN", "CLIFF PATH", "CLOSET", "FRONT LOBBY",
      "LIBRARY OF EVIL BOOKS", "STUDY WITH DESK & HOLE IN WALL",
      "COBWEBBY ROOM", "VERY COLD CHAMBER", "SPOOKY ROOM",
      "CLIFF PATH BY MARSH", "RUBBLE STREWN VERANDAH", "FRONT PORCH",
      "FRONT TOWER", "SLOPING CORRIDOR", "UPPER GALLERY", "MARSH BY WALL",
      "MARSH", "SOGGY PATH", "BY TWISTED RAILING", "PATH THROUGH IRON GATE",
      "BY RAILINGS", "BENEATH FRONT TOWER", "DEBRIS FROM CRUMBLING FACADE",
      "FALLEN BRICKWORK", "ROTTING STONE ARCH", "CRUMBLING CLIFFTOP"
    ]
    @oo = [ nil, # DIM O$(W)
      "PAINTING", "RING", "MAGIC SPELLS", "GOBLET", "SCROLL", "COINS",
      "STATUE", "CANDLESTICK", "MATCHES", "VACUUM", "BATTERIES", "SHOVEL",
      "AXE", "ROPE", "BOAT", "AEROSOL", "CANDLE", "KEY", "NORTH", "SOUTH",
      "WEST", "EAST", "UP", "DOWN", "DOOR", "BATS", "GHOSTS", "DRAWER",
      "DESK", "COAT", "RUBBISH", "COFFIN", "BOOKS", "XZANFAR", "WALL",
      "SPELLS"
    ]
    @vv = [ nil, # DIM V$(V)
      "HELP", "CARRYING?", "GO", "N", "S", "W", "E", "U", "D", "GET",
      "TAKE", "OPEN", "EXAMINE", "READ", "SAY", "DIG", "SWING",
      "CLIMB", "LIGHT", "UNLIGHT", "SPRAY", "USE", "UNLOCK",
      "LEAVE", "SCORE"
    ]
    @cc = [ 0 ]
    @w.times { @cc << 0 } # DIM C(W)
    @ll = [ nil,
      46, 38, 35, 50, 13, 18, 28, 42, 10, 25,
      26, 4, 2, 7, 47, 60, 43, 32
    ]
    @ff = [ 0 ]
    @w.times { @ff << 0 } # DIM F(W)
    @ff[18] = 1
    @ff[17] = 1
    @ff[2]  = 1
    @ff[26] = 1
    @ff[28] = 1
    @ff[23] = 1
    @llll = 60 # LL = 60
    @rm = 57 # RM = 57
    @mm = "OK" # M$ = "OK"
    @hh = [ nil, # DIM H$(14)
      "BATS ATTACKING!", "A MAGICAL BARRIER TO THE WEST",
      "YOU CAN'T CARRY A BOAT!", "YOU HAVE THE ",
      "USE THIS WORD WITH CARE - 'XZANFAR'", "*MAGIC OCCURS*",
      "DUG THE BARS OUT", "STUDY WITH SECRET ROOM", "YOU BROKE THE THIN WALL",
      "YOU SEE THICK FOREST AND CLIFF TO THE SOUTH",
      "IT CASTS A FLICKERING LIGHT", "YOU HAVE EVERYTHING",
      "RETURN TO THE GATE FOR FINAL SCORE",
      "WELL DONE - YOU HAVE FINISHED THE GAME"
    ]
  end

  def play
    system("clear")
    puts "HAUNTED HOUSE"
    puts "-------------"
    puts "YOUR LOCATION"
    puts @dd[@rm]
    print "EXITS: "
    @rr[@rm].each_char { |x| print "#{x}, " }
    puts
    # line 180 ...
    (1..@g).each do |i|
      if @ll[i] == @rm and @ff[i] == 0 then
        puts "YOU CAN SEE #{@oo[i]} HERE"
      end
    end
    # ... line 200
    puts "========================="
    puts @mm
    @mm = "WHAT?"
    puts "WHAT WILL YOU DO NOW"
    # INPUT Q$ on line 230 ...
    @vb, @ob = 0, 0 # VB=0:WB=0
    @vstr, @wstr = gets.upcase.chomp.split(" ")
    @vb = @vv.index(@vstr) || 0
    @ob = @oo.index(@wstr) || 0
    # line 360 ...
    @mm = "THAT'S SILLY" if @wstr and @ob == 0
    @vb = @v + 1 if @vb == 0 # IF VB=0 THEN VB=V+1
    @mm = "I NEED TWO WORDS" unless @wstr and @vstr
    @mm = "YOU CAN'T #@vstr"      if @vb > @v and @ob > 0
    @mm = "YOU DON'T MAKE SENSE"  if @vb > @v and @ob == 0
    @mm = "YOU DON'T HAVE #@wstr" if @vb < @v and @ob > 0 and @cc[@ob] == 0
    # line 420 ...
    if @ff[26] == 1 and @rm == 13 and rand(4) != 3 and @vb != 21 then
      @mm = @hh[1]
      return
    end
    # line 430 ...
    if @rm == 44 and rand(3) == 1 and @ff[24] != 1 then
      @ff[27] = 1
    end
    @llll -= 1 if @ff[0] == 1 # IF F(0)=1 THEN LL=LL-1
    @ff[0] = 0 if @llll < 1
    # line 455 ... VERB DISPATCH ...
    self.send("verb#@vb") if @vb <= @v
    # line 470 ...
    @mm = "YOUR CANDLE IS WANING!" if @llll == 10
    @mm = "YOUR CANDLE IS OUT!"    if @llll ==  1
    puts
  end

private
  def gosub1580
    puts "PRESS RETURN TO CONTINUE"
    gets
  end

  def verb1 # line 500 ...
    puts "WORDS I KNOW:"
    puts @vv[1..-1].join(", ")
    @mm = ""
    gosub1580
  end

  def verb2 # line 570 ...
    puts "YOU ARE CARRYING:"
    t = []
    (1..@g).each do |i|
      if @cc[i] == 1 then
        t << @oo[i]
      end
    end
    puts t.join(", ")
    @mm = ""
    gosub1580
  end

  def verb3 # line 640 ...
    @d = 0
    @d = @vb - 3   if @ob == 0
    @d = 1         if @ob == 19
    @d = 2         if @ob == 20
    @d = 3         if @ob == 21
    @d = 4         if @ob == 22
    @d = 5         if @ob == 23
    @d = 6         if @ob == 24
    @d = 1         if @rm == 20 and @d == 5
    @d = 3         if @rm == 20 and @d == 6
    @d = 2         if @rm == 22 and @d == 6
    @d = 3         if @rm == 22 and @d == 5
    @d = 1         if @rm == 36 and @d == 6
    @d = 2         if @rm == 36 and @d == 5
    if @ff[14] == 1 then
      @mm = "CRASH! YOU FELL OUT OF THE TREE!"
      @ff[14] = 0
      return
    end
    if @ff[27] == 1 and @rm == 52 then
      @mm = "GHOSTS WILL NOT LET YOU MOVE"
      return
    end
    if @rm == 45 and @cc[1] == 1 and @ff[34] == 0 then
      @mm = @hh[2]
      return
    end
    if (@rm == 26 and @ff[0] == 0) and (@d == 1 or @d == 4) then
      @mm = "YOU NEED A LIGHT"
      return
    end
    # line 820...
    if @rm == 54 and @cc[15] != 1 then
      @mm = "YOU'RE STUCK!"
      return
    end
    if @cc[15] == 1 and not ([53, 54, 55, 47].include? @rm) then
      @mm = @hh[3]
      return
    end
    if (@rm > 26 and @rm < 30) and @ff[0] == 0 then
      @mm = "TOO DARK TO MOVE"
      return
    end
    # line 850 ...
    @ff[35] = 0
    # .... still 850 ... HANDLE MOVING FROM ROOM TO ROOM
    @rr[@rm].each_char do |u|
      if     u == "N" and @d == 1 and @ff[35] == 0 then
        @rm    -= 8
        @ff[35] = 1
      elsif  u == "S" and @d == 2 and @ff[35] == 0 then
        @rm    += 8
        @ff[35] = 1
      elsif  u == "W" and @d == 3 and @ff[35] == 0 then
        @rm    -= 1
        @ff[35] = 1
      elsif  u == "E" and @d == 4 and @ff[35] == 0 then
        @rm    += 1
        @ff[35] = 1
      end
    end
    @mm = "OK"
    @mm = "CAN'T GO THAT WAY!" if @ff[35] == 0
    @mm = "GO WHERE?"          if @d < 1
    if @rm == 41 and @ff[23] == 1 then
      @rr[49] = "SW"
      @mm     = "THE DOOR SLAMS SHUT!"
      @ff[23] = 0
    end
  end

  def verb10 # line 980 ...
    @mm = "I CAN'T GET #@wstr"   if @ob > @g
    @mm = "IT ISN'T HERE"        if @ll[@ob] != @rm
    @mm = "WHAT #@wstr?"         if @ff[@ob] != 0
    @mm = "YOU ALREADY HAVE IT"  if @cc[@ob] == 1
    if @ob > 0 and @ll[@ob] == @rm and @ff[@ob] == 0 then
      @cc[@ob] = 1
      @ll[@ob] = 65
      @mm = @hh[4] + @wstr
    end
  end

  def verb12 # line 1030 ...
    if @rm == 43 and (@ob = 28 or @ob == 29) then
      @ff[17] = 0
      @mm = "DRAWER OPEN"
    end
    if @rm == 28 and @ob == 25 then
      @mm = "IT'S LOCKED"
    end
    if @rm == 38 and @ob == 32 then
      @mm = "THAT'S CREEPY!"
      @ff[2] = 0
    end
  end

  def verb13 # line 1070 ...
    if @ob == 30 then
      @ff[18] = 0
      @mm = "SOMETHING HERE!"
    end
    if @ob == 31 then
      @mm = "THAT'S DISGUSTING!"
    end
    if @ob == 28 or @ob == 29 then
      @mm = "THERE IS A DRAWER"
    end
    if @ob == 33 or @ob == 5 then
      verb14 # GOSUB 1140
    end
    if @rm == 43 and @ob == 35 then
      @mm = "THERE IS SOMETHING BEYOND..."
    end
    if @ob == 32 then
      verb12 # GOSUB 1030
    end
  end

  def verb14 # line 1140 ...
    if @rm == 42 or @ob == 33 then
      @mm = "THEY ARE DEMONIC WORKS"
    end
    if (@ob == 3 or @ob == 36) and @cc[3] == 1 and @ff[34] == 0 then
      @mm = @hh[5]
    end
    if @cc[5] == 1 and @ob == 5 then
      @mm = "THE SCRIPT IS IN AN ALIEN TONGUE"
    end
  end

  def verb15 # line 1180 ...
    @mm = "OK '#@wstr'"
    if @cc[3] == 1 and @ob == 34 then
      @mm = @hh[6]
      if @rm != 45 then
        @rm = rnd(64)
      end
    end
    if @cc[3] == 1 and @ob == 34 and @rm == 45 then
      @ff[34] = 1
    end
  end

  def verb16 # line 1220 ...
    if @cc[12] == 1 then
      @mm = "YOU MADE A HOLE"
    end
    if @cc[12] == 1 and @rm == 30 then
      @mm = @hh[7]
      @dd[@rm] = "HOLE IN WALL"
      @rr[@rm] = "NSE"
    end
  end

  def verb17 # line 1250 ...
    if @cc[14] != 1 and @rm == 7 then
      @mm = "THIS IS NO TIME TO PLAY GAMES"
    end
    if @ob == 14 and @cc[14] == 1 then
      @mm = "YOU SWUNG IT"
    end
    if @ob == 13 and @cc[13] == 1 then
      @mm = "WHOOSH!"
    end
    if @ob == 13 and @cc[13] == 1 and @rm == 45 then
      @rr[@rm] = "WN"
      @dd[@rm] = @hh[8]
      @mm = @hh[9]
    end
  end

  def verb18 # line 1300 ...
    if @ob == 14 and @cc[14] == 1 then
      @mm = "IT ISN'T ATTACHED TO ANYTHING!"
    end
    if @ob == 14 and @cc[14] != 1 and @rm == 7 and @ff[14] == 0 then
      @mm = @hh[10]
      @ff[14] = 1
      return
    end
    if @ob == 14 and @cc[14] != 1 and @rm == 7 and @ff[14] == 1 then
      @mm = "GOING DOWN"
      @ff[14] = 0
    end
  end

  def verb19 # line 1340 ...
    if @ob == 17 and @cc[17] == 1 and @cc[8] == 0 then
      @mm = "IT WILL BURN YOUR HANDS"
    end
    if @ob == 17 and @cc[17] == 1 and @cc[9] == 0 then
      @mm = "NOTHING TO LIGHT IT WITH"
    end
    if @ob == 17 and @cc[17] == 1 and @cc[9] == 1 and @cc[8] == 1 then
      @mm = @hh[11]
      @ff[0] = 1
    end
  end

  def verb20 # line 1380 ...
    if @ff[0] == 1 then
      @ff[0] = 0
      @mm = "EXTINGUISHED"
    end
  end

  def verb21 # line 1400 ...
    if @ob == 26 and @cc[16] == 1 then
      @mm == "HISSSSS"
    end
    if @ob == 26 and @cc[16] == 1 and @ff[26] == 1 then
      @mm = "PFFT! GOT THEM"
    end
  end

  def verb22 # line 1430 ...
    if @ob == 10 and @cc[10] == 1 and @cc[11] == 1 then
      @mm = "SWITCHED ON"
      @ff[24] = 1
    end
    if @ff[27] == 1 and @ff[24] == 1 then
      @mm = "WHIZZ-VACUUMED THE GHOSTS UP!"
      @ff[27] = 0
    end
  end

  def verb23 # line 1460 ...
    if @rm == 43 and (@ob == 27 or @ob == 28) then
      verb12 # GOSUB 1030
    end
    if @rm != 28 or @ob != 25 or @ff[25] == 1 or @cc[18] == 0 then
      return
    end
    @ff[25] = 1
    @rr[@rm] = "SEW"
    @dd[@rm] = "HUGE OPEN DOOR"
    @mm = "THE KEY TURNS!"
  end

  def verb24 # line 1490 ...
    if @cc[@ob] == 1 then
      @cc[@ob] = 0
      @ll[@ob] = @rm
      @mm = "DONE"
    end
  end

  def verb25 # line 1510 ...
    s = 0
    @mm = ""
    (1..@g).each do |i|
      s += 1 if @cc[i] == 1
    end
    if s == 17 and @cc[15] != 1 and @rm != 57 then
      puts @hh[12]
      puts @hh[13]
    end
    if s == 17 and @rm == 57 then
      puts "DOUBLE SCORE FOR REACHING HERE!"
      s *= 2
    end
    puts "YOUR SCORE=#{s}"
    if s > 18 then
      puts @hh[14]
    end
    puts
    exit 0
  end

  alias :verb4  :verb3
  alias :verb5  :verb3
  alias :verb6  :verb3
  alias :verb7  :verb3
  alias :verb8  :verb3
  alias :verb9  :verb3
  alias :verb11 :verb10

end


hh = HauntedHouse.new
hh.play while true