extends Node2D

# Entity renderer — manages entity sprites under the Entities node
# Creates/updates/removes Sprite2D children based on entity data

const TILE_SIZE: int = 32

var entity_nodes: Dictionary = {}  # id -> Node2D mapping

func _ready() -> void:
	print("EntityRenderer: Initialized")

# Update entities from snapshot data
func update_entities(entities: Array) -> void:
	var active_ids: Array = []

	# Create or update entities
	for entity_data in entities:
		if not entity_data.has("id"):
			continue

		var entity_id = entity_data.id
		active_ids.append(entity_id)

		# Create entity node if it doesn't exist
		if not entity_nodes.has(entity_id):
			_create_entity_node(entity_id, entity_data)
		else:
			_update_entity_node(entity_id, entity_data)

	# Remove entities that are no longer visible
	var ids_to_remove: Array = []
	for entity_id in entity_nodes.keys():
		if entity_id not in active_ids:
			ids_to_remove.append(entity_id)

	for entity_id in ids_to_remove:
		_remove_entity_node(entity_id)

# Create a new entity node (placeholder visual)
func _create_entity_node(entity_id: int, entity_data: Dictionary) -> void:
	var entity_node = ColorRect.new()
	entity_node.name = "Entity_" + str(entity_id)
	entity_node.size = Vector2(32, 32)
	entity_node.pivot_offset = Vector2(16, 16)

	# Color based on type
	if entity_data.get("type") == "npc":
		entity_node.color = Color(0.3, 0.6, 0.9)  # Blue for NPCs
	else:
		entity_node.color = Color(0.8, 0.8, 0.8)  # Gray for unknown

	add_child(entity_node)
	entity_nodes[entity_id] = entity_node

	_update_entity_node(entity_id, entity_data)

# Update an existing entity node
func _update_entity_node(entity_id: int, entity_data: Dictionary) -> void:
	if not entity_nodes.has(entity_id):
		return

	var entity_node = entity_nodes[entity_id]

	# Update position
	if entity_data.has("position"):
		var pos = entity_data.position
		if pos is Array and pos.size() >= 2:
			entity_node.position = Vector2(pos[0] * TILE_SIZE, pos[1] * TILE_SIZE)
		else:
			push_warning("EntityRenderer: malformed position for entity %s" % entity_id)

# Remove an entity node
func _remove_entity_node(entity_id: int) -> void:
	if not entity_nodes.has(entity_id):
		return

	var entity_node = entity_nodes[entity_id]
	entity_node.queue_free()
	entity_nodes.erase(entity_id)