extends Node2D
## One greybox arena, one screen (640x360), fixed camera. Draws its own
## floor and wall slabs; tracks kills for instrumentation.

var kills: int = 0


func _ready() -> void:
	$Spawner.grunt_spawned.connect(_on_grunt_spawned)
	$Mech.hull_changed.connect(_on_hull_changed)


func _on_grunt_spawned(grunt: Node) -> void:
	grunt.died.connect(func() -> void: kills += 1)


func _on_hull_changed(hull: float, hull_max: float) -> void:
	$HUD/HullFill.size.x = 118.0 * (hull / hull_max)


func _draw() -> void:
	draw_rect(Rect2(0, 0, 640, 360), Color(0.1, 0.11, 0.13))
	for x in range(0, 641, 32):
		draw_line(Vector2(x, 0), Vector2(x, 360), Color(0.13, 0.145, 0.17))
	for y in range(0, 361, 32):
		draw_line(Vector2(0, y), Vector2(640, y), Color(0.13, 0.145, 0.17))
	var wall := Color(0.3, 0.32, 0.36)
	draw_rect(Rect2(0, 0, 640, 16), wall)
	draw_rect(Rect2(0, 344, 640, 16), wall)
	draw_rect(Rect2(0, 0, 16, 360), wall)
	draw_rect(Rect2(624, 0, 16, 360), wall)