1 files changed, 49 insertions, 0 deletions
diff --git a/scripts/base_defender.gd b/scripts/base_defender.gd
new file mode 100644
index 0000000..66be11d
--- /dev/null
+++ b/scripts/base_defender.gd
@@ -0,0 +1,49 @@
+extends StaticBody2D
+
+@onready var sprite_node = $Sprite2D
+
+var defender_range : float
+var fire_rate : float
+var damage : int
+var target : CharacterBody2D
+
+func _on_fire_timer_timeout() -> void:
+	# extending classes override here
+	pass
+
+func select_target() -> void:
+	var targets : Array = _find_targets()
+
+	# this is all to select the furthest target on the track
+	var curr : PathFollow2D = null
+	for i in targets:
+		if curr == null:
+			curr = i.get_node("../")
+		else:
+			if i.get_parent().get_progress() > curr.get_progress():
+				curr = i.get_node("../")
+
+	_update_state_machine(curr)
+
+func _find_targets() -> Array:
+	var targets : Array = get_node("Tower").get_overlapping_bodies()
+	var tmp : Array = []
+	for i in targets:
+		if "Crawler" in i.name:
+			tmp.append(i)
+	return tmp
+
+func _update_state_machine(curr : PathFollow2D) -> void:
+	if (curr == null):
+		target = null
+		sprite_node.idle_state()
+	else:
+		target = curr.get_child(0)
+		sprite_node.attack_state()
+
+func _on_tower_body_entered(_body: Node2D) -> void:
+	var old_target : CharacterBody2D = target
+	select_target()
+	if old_target == null && old_target != target:
+		$FireTimer.start(fire_rate)
+		_on_fire_timer_timeout()