1 files changed, 67 insertions, 0 deletions
diff --git a/lib/colonial_twilight/fln_bot/fln_attack.rb b/lib/colonial_twilight/fln_bot/fln_attack.rb
new file mode 100644
index 0000000..bf461e7
--- /dev/null
+++ b/lib/colonial_twilight/fln_bot/fln_attack.rb
@@ -0,0 +1,67 @@
+# frozen_string_literal: true
+
+module ColonialTwilight
+  module FLNBotAttack
+    def attack
+      # return false if !available_resources.positive? && !extort
+
+      n = 2
+      ambush_cond = ->(s) { n.positive? && @turn.may_special_activity?(:ambush) && may_ambush_1_in?(s) }
+      cond = ->(s) { may_attack_1_in?(s) || ambush_cond.call(s) }
+      until (space = attack_priority(@board.search(&cond)).sample).nil?
+        break if !available_resources.positive? && !extort
+
+        _apply_attack(space, ambush_cond.call(space))
+        n -= 1
+      end
+
+      until (space = attack_priority(@board.search { |s| may_attack_2_in?(s) }).sample).nil?
+        break if !available_resources.positive? && !extort
+
+        _apply_attack(space, ambush_cond.call(space))
+        n -= 1
+      end
+
+      @turn.operation_done?
+    end
+
+    def _apply_attack(space, ambush)
+      apply_action ambush ? _ambush(space) : _attack(space)
+    end
+
+    def _ambush(space)
+      action = @turn.special_activity_in(:ambush, space, 1).activate(1)
+      casualties = _casualties(space, action, 1)
+      _attrition(action, casualties)
+    end
+
+    def _attack(space)
+      action = @turn.operation_in(:attack, space, 1).activate(space.fln_underground)
+      return action if (d = d6) > space.guerrillas
+
+      casualties = _casualties(space, action, 2)
+      _attrition(action, casualties)
+      action.transfer_from(place_from, :fln_underground) if d == 1
+      action
+    end
+
+    def _casualties(space, action, casualties)
+      num = 0
+      FLNAttackRules::CASUALTIES_PRIORITY.each do |sym|
+        next unless (n = space.send(sym)).positive?
+
+        casualties -= (n = (n > casualties ? casualties : n))
+        num += n
+        action.transfer_to(:casualties, sym, n)
+        action.shift(:commitment, -1) if sym == :gov_bases
+        break if casualties.zero?
+      end
+      num
+    end
+
+    def _attrition(action, casualties)
+      action.transfer_to(:available, :fln_active, (casualties + 1) / 2)
+            .transfer_to(:casualties, :fln_active, casualties / 2)
+    end
+  end
+end