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The evolution continues with a 3 foot tall Indonesian fellow.
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require "rubygems" | ||
require "ruby-debug" | ||
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class HomoFloresiensis | ||
attr_accessor :last_move, :board, :moves_to_make | ||
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def initialize | ||
@board = Board.new | ||
end | ||
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def name | ||
"Homo Floresiensis" | ||
end | ||
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def new_game | ||
[2, 3, 3, 4, 5].inject([]) { |placed, length| placed.push(Placement.create_for_length_and_context(length, placed)) } | ||
end | ||
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def take_turn(state, ships_remaining) | ||
board.push_state(state) | ||
board.next_move | ||
end | ||
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class Placement | ||
attr_reader :length, :context, :direction | ||
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def self.create_for_length_and_context(length, context) | ||
new(length, context).value | ||
end | ||
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def initialize(length, context) | ||
@length = length | ||
@context = context | ||
end | ||
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def direction | ||
@direction ||= [:across, :down].sample | ||
end | ||
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def value | ||
@value ||= (generate_coords + [length, direction]) | ||
end | ||
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private | ||
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def generate_coords | ||
try = [rand(10-length), rand(10)] | ||
try.reverse! if direction == :down | ||
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is_succcessful_attempt(try) ? try : generate_coords | ||
end | ||
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def is_succcessful_attempt(try) | ||
context.all? { |placement| | ||
(expand(*try) & self.class.expand(*placement)).empty? | ||
} | ||
end | ||
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def expand(x, y) | ||
self.class.expand(x, y, length, direction) | ||
end | ||
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def self.expand(x, y, length, direction) | ||
xy = "#{x}#{y}".to_i | ||
multiplier = direction == :down ? 1 : 10 | ||
coords = (0...length).map{ |i| xy + i * multiplier } | ||
end | ||
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end | ||
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class Board | ||
attr_reader :states, :moves_made, :avaliable_moves | ||
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def initialize | ||
@states = [] | ||
@moves_made = [] | ||
@avaliable_moves = [] | ||
end | ||
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def state | ||
states.last | ||
end | ||
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def last_move | ||
moves_made.last | ||
end | ||
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def push_state(state) | ||
@states << state | ||
@avaliable_moves += valid_moves_around_last_move if last_move_was_hit? | ||
end | ||
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def next_move | ||
move = get_move | ||
moves_made << move | ||
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move | ||
end | ||
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private | ||
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def get_move | ||
move = if avaliable_moves.empty? | ||
[rand(10), rand(10)] | ||
else | ||
avaliable_moves.pop | ||
end | ||
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is_succcessful_attempt(move) ? move : get_move | ||
end | ||
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def is_succcessful_attempt(try) | ||
state[try[1]][try[0]] == :unknown | ||
end | ||
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def valid_moves_around_last_move | ||
moves = [] | ||
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moves << [last_move[0], last_move[1]+1] if last_move[1]+1 < 10 | ||
moves << [last_move[0], last_move[1]-1] if last_move[1]-1 >= 0 | ||
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moves << [last_move[0]+1, last_move[1]] if last_move[0]+1 < 10 | ||
moves << [last_move[0]-1, last_move[1]] if last_move[0]-1 >= 0 | ||
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moves | ||
end | ||
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def last_move_was_hit? | ||
!moves_made.empty? && state[last_move[1]][last_move[0]] == :hit | ||
end | ||
end | ||
end | ||
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