extends Node2D

const WORLD_TO_LOCAL: float = 0.04

@onready var tracker: Node2D = get_node("../../../ExplorationTracker")
@onready var fleet: Node2D = get_node("../../../Fleet")


func _process(_delta: float) -> void:
	if is_visible_in_tree():
		queue_redraw()


func _draw() -> void:
	var chunk_size_local: float = WorldGen.CHUNK_SIZE * WORLD_TO_LOCAL

	for chunk in tracker.get_explored_chunks():
		var origin_local: Vector2 = WorldGen.chunk_origin(chunk) * WORLD_TO_LOCAL
		var biome: int = WorldGen.biome_at_chunk(chunk)
		var color: Color = WorldGen.biome_color(biome)
		var rect: Rect2 = Rect2(origin_local, Vector2(chunk_size_local, chunk_size_local))
		draw_rect(rect, color, true)
		draw_rect(rect, Color(0.0, 0.0, 0.0, 0.4), false, 1.5)

		if WorldGen.has_planet_at_chunk(chunk):
			# Same deterministic per-chunk data PlanetField spawns the
			# actual Planet from - the marker stays put on the map even
			# for a chunk whose Planet node isn't currently loaded (out of
			# spawn_radius_chunks of the fleet).
			var data: Dictionary = WorldGen.planet_data_at_chunk(chunk)
			var planet_local: Vector2 = origin_local + data.local_pos * WORLD_TO_LOCAL
			draw_circle(planet_local, 5.0, Color(0.7, 0.65, 0.55))
			draw_arc(planet_local, 5.0, 0.0, TAU, 16, Color(1.0, 1.0, 1.0, 0.9), 1.0, true)

	var fleet_local: Vector2 = fleet.get_centroid() * WORLD_TO_LOCAL
	var marker_points: PackedVector2Array = PackedVector2Array([
		fleet_local + Vector2(0, -10),
		fleet_local + Vector2(7, 8),
		fleet_local + Vector2(-7, 8),
	])
	draw_colored_polygon(marker_points, Color(0.3, 0.9, 1.0))
	draw_polyline(PackedVector2Array([marker_points[0], marker_points[1], marker_points[2], marker_points[0]]), Color(1, 1, 1), 1.5, true)