From 4e585a2650450812e99f20d6b31c9b17092db2f2 Mon Sep 17 00:00:00 2001
From: Eryn Wells <eryn@erynwells.me>
Date: Sun, 15 May 2022 16:19:03 -0700
Subject: [PATCH] Implement passive healing

---
 erynrl/actions.py    | 23 +++++++++++++++++++++++
 erynrl/components.py | 20 +++++++++++++++++++-
 erynrl/events.py     |  2 +-
 3 files changed, 43 insertions(+), 2 deletions(-)

diff --git a/erynrl/actions.py b/erynrl/actions.py
index d4d5fae..3e324c4 100644
--- a/erynrl/actions.py
+++ b/erynrl/actions.py
@@ -220,6 +220,12 @@ class WaitAction(Action):
 
     def perform(self, engine: 'Engine') -> ActionResult:
         log.ACTIONS.debug('%s is waiting a turn', self.actor)
+
+        if self.actor == engine.hero:
+            should_recover_hit_points = self.actor.fighter.passively_recover_hit_points()
+            if should_recover_hit_points:
+                return ActionResult(self, alternate=HealAction(self.actor, 1))
+
         return self.success()
 
 class DieAction(Action):
@@ -250,3 +256,20 @@ class DropItemAction(Action):
     def perform(self, engine: 'Engine') -> ActionResult:
         engine.entities.add(self.item)
         return self.success()
+
+class HealAction(Action):
+    '''Heal a target actor some number of hit points'''
+
+    def __init__(self, actor: 'Actor', hit_points_to_recover: int):
+        super().__init__(actor)
+        self.hit_points_to_recover = hit_points_to_recover
+
+    def perform(self, engine: 'Engine') -> ActionResult:
+        fighter = self.actor.fighter
+        if not fighter:
+            log.ACTIONS.error('Attempted to heal %s but it has no hit points', self.actor)
+            return self.failure()
+
+        fighter.hit_points += self.hit_points_to_recover
+
+        return self.success()
\ No newline at end of file
diff --git a/erynrl/components.py b/erynrl/components.py
index 86b266f..ce5abde 100644
--- a/erynrl/components.py
+++ b/erynrl/components.py
@@ -1,8 +1,9 @@
 # Eryn Wells <eryn@erynwells.me>
 
+import random
 from typing import Optional
 
-# pylint: disable=too-few-public-methods
+
 class Component:
     '''A base, abstract Component that implement some aspect of an Entity's behavior.'''
 
@@ -29,6 +30,9 @@ class Fighter(Component):
         self.attack_power = attack_power
         self.defense = defense
 
+        self.turns_since_last_heal = 0
+        self.turn_for_next_passive_heal = random.randint(3, 7)
+
     @property
     def hit_points(self) -> int:
         '''Number of hit points remaining. When a Fighter reaches 0 hit points, they die.'''
@@ -42,3 +46,17 @@ class Fighter(Component):
     def is_dead(self) -> bool:
         '''True if the Fighter has died, i.e. reached 0 hit points'''
         return self.__hit_points == 0
+
+    def passively_recover_hit_points(self) -> bool:
+        '''Check the passive healing clock to see if this fighter should recover hit points. If not, increment the
+        counter.'''
+        if self.hit_points == self.maximum_hit_points:
+            self.turns_since_last_heal = 0
+
+        if self.turns_since_last_heal < self.turn_for_next_passive_heal:
+            self.turns_since_last_heal += 1
+            return False
+
+        self.turns_since_last_heal = 0
+        self.turn_for_next_passive_heal = random.randint(3, 7)
+        return True
diff --git a/erynrl/events.py b/erynrl/events.py
index 25ccd4d..bb1ee7f 100644
--- a/erynrl/events.py
+++ b/erynrl/events.py
@@ -100,4 +100,4 @@ class GameOverEventHandler(EventHandler):
             case tcod.event.KeySym.ESCAPE:
                 action = ExitAction(hero)
 
-        return action
\ No newline at end of file
+        return action