feat: add proper death from starvation and survival tasks urgency

simulation/SimNPC.gd

@@ -1,7 +1,7 @@
 class_name SimNPC
 extends RefCounted
 
-@export var DEBUG_LOGS := true
+const DEBUG_LOGS := true
 
 const TASK_STATE_IDLE := "idle"
 const TASK_STATE_TRAVELING := "traveling"
@@ -20,6 +20,9 @@ var task_state: String = TASK_STATE_IDLE
 var position: Vector3
 
 var is_starving := false
+var starvation_ticks := 0
+var starvation_death_threshold := 20
+var is_dead := false
 
 var task_duration := 0.0
 var task_progress := 0.0
@@ -42,18 +45,13 @@ func _init(
 	position = Vector3(randf_range(-8.0, 8.0), 0.0, randf_range(-8.0, 8.0))
 
 func simulate_tick(village: SimVillage) -> void:
-	hunger += 5.0 * village.food_modifier
-	energy -= 2.0
+	if is_dead:
+		return
 
-	hunger = clamp(hunger, 0.0, 100.0)
-	energy = clamp(energy, 0.0, 100.0)
+	update_needs(village)
 
-	is_starving = hunger >= 90.0
-
-	if is_starving:
-		energy -= 8.0
-
-	energy = clamp(energy, 0.0, 100.0)
+	if is_dead:
+		return
 
 	if task_state == TASK_STATE_IDLE or task_state == TASK_STATE_COMPLETE:
 		choose_new_task(village)
@@ -68,8 +66,56 @@ func simulate_tick(village: SimVillage) -> void:
 		if task_progress >= task_duration:
 			task_complete = true
 			task_state = TASK_STATE_COMPLETE
+			
+func update_needs(village: SimVillage) -> void:
+	hunger += 3.0 * village.food_modifier
 
+	match task_state:
+		TASK_STATE_IDLE:
+			energy -= 0.5
+		TASK_STATE_TRAVELING:
+			energy -= 2.0
+		TASK_STATE_WORKING:
+			if current_task != "rest":
+				energy -= 3.0
+		TASK_STATE_COMPLETE:
+			energy -= 0.25
+
+	hunger = clamp(hunger, 0.0, 100.0)
+	energy = clamp(energy, 0.0, 100.0)
+
+	is_starving = hunger >= 90.0
+
+	if is_starving:
+		starvation_ticks += 1
+	else:
+		starvation_ticks = 0
+
+	if starvation_ticks >= starvation_death_threshold:
+		die_from_starvation()
+
+func die_from_starvation() -> void:
+	is_dead = true
+	current_task = "dead"
+	task_state = TASK_STATE_IDLE
+	task_progress = 0.0
+	task_duration = 0.0
+	task_complete = true
+
+	if DEBUG_LOGS:
+		print("[SimNPC] ", npc_name, " died from starvation.")
+		
 func choose_new_task(village: SimVillage) -> void:
+	if is_dead:
+		return
+
+	if is_starving:
+		if village.food > 0:
+			set_task("eat", 1.0)
+		else:
+			set_task("gather_food", 4.0)
+		return
+
 	if hunger > 75.0:
 		if village.food > 0:
 			set_task("eat", 2.0)
@@ -77,7 +123,7 @@ func choose_new_task(village: SimVillage) -> void:
 			set_task("gather_food", 5.0)
 		return
 
-	if energy < 30.0:
+	if energy < 25.0:
 		set_task("rest", 4.0)
 		return
 
@@ -94,6 +140,9 @@ func choose_new_task(village: SimVillage) -> void:
 			set_task("study", 6.0)
 		_:
 			set_task("wander", 4.0)
+			
+func should_eat_immediately_after_task() -> bool:
+	return current_task == "gather_food" and is_starving and not is_dead
 
 func choose_best_work_task(village: SimVillage) -> String:
 	var food_score := calculate_task_score(