update

scripts/systems/health_system.gd

@@ -0,0 +1,49 @@
+extends Node
+
+func _ready() -> void:
+  EventBus.damage_requested.connect(_on_damage_requested)
+  EventBus.heal_requested.connect(_on_heal_requested)
+
+func _process(delta: float) -> void:
+  for entity in Stats.entities:
+    if not is_instance_valid(entity):
+      continue
+    var data: Dictionary = Stats.entities[entity]
+    if not data["alive"]:
+      continue
+    var regen: float = data["health_regen"]
+    if regen > 0 and data["health"] < data["max_health"]:
+      data["health"] = min(data["health"] + regen * delta, data["max_health"])
+      EventBus.health_changed.emit(entity, data["health"], data["max_health"])
+
+func _on_damage_requested(attacker: Node, target: Node, amount: float) -> void:
+  if not Stats.is_alive(target):
+    return
+  var remaining: float = amount
+  var shield_system: Node = get_node_or_null("../ShieldSystem")
+  if shield_system:
+    remaining = shield_system.absorb(target, remaining)
+  EventBus.damage_dealt.emit(attacker, target, amount)
+  if remaining > 0:
+    _take_damage(target, remaining)
+
+func _take_damage(entity: Node, amount: float) -> void:
+  var health: float = Stats.get_stat(entity, "health")
+  health -= amount
+  if health <= 0:
+    health = 0
+  Stats.set_stat(entity, "health", health)
+  var max_health: float = Stats.get_stat(entity, "max_health")
+  EventBus.health_changed.emit(entity, health, max_health)
+  if health <= 0:
+    Stats.set_stat(entity, "alive", false)
+    EventBus.entity_died.emit(entity)
+
+func _on_heal_requested(healer: Node, target: Node, amount: float) -> void:
+  if not Stats.is_alive(target):
+    return
+  var health: float = Stats.get_stat(target, "health")
+  var max_health: float = Stats.get_stat(target, "max_health")
+  health = min(health + amount, max_health)
+  Stats.set_stat(target, "health", health)
+  EventBus.health_changed.emit(target, health, max_health)