extends Node

var world_seed = 0;
var world_info = {
	"seed": 0,
	"name": "world"
}

func new_world():
	world_info.seed = round(Time.get_unix_time_from_system())
	print("World seed is " + str(world_info.seed))
	print("World name is " + str(world_info.name))

func save_world():
	print("Saving world")
	var save_game = FileAccess.open("user://%s.save" % world_info.name, FileAccess.WRITE)
	
	# Saving world info
	var world_save = world_info.duplicate()
	world_save["node"] = "worldinfo"
	save_game.store_line(JSON.stringify(world_save))
	
	var save_nodes = get_tree().get_nodes_in_group("Persistent")
	
	for node in save_nodes:
		if node.scene_file_path.is_empty():
			print("persistent node '%s' is not an instanced scene, skipped" % node.name)
			continue

		if !node.has_method("save"):
			print("persistent node '%s' is missing a save() function, skipped" % node.name)
			continue

		var node_data = node.call("save")
		if (node_data == {}): continue
		
		var json_string = JSON.stringify(node_data)

		save_game.store_line(json_string)

func load_world(save_name):
	if not FileAccess.file_exists("user://%s.save" % save_name):
		return
		
	var save_nodes = get_tree().get_nodes_in_group("Persistent")
	for i in save_nodes:
		i.queue_free()

	var save_game = FileAccess.open("user://%s.save" % save_name, FileAccess.READ)
	
	var earth = get_tree().root.get_node("world/Earth")
	
	while save_game.get_position() < save_game.get_length():
		var json_string = save_game.get_line()

		var json = JSON.new()

		var parse_result = json.parse(json_string)
		if not parse_result == OK:
			print("JSON Parse Error: ", json.get_error_message(), " in ", json_string, " at line ", json.get_error_line())
			continue
			
		var node_data = json.get_data()
		var new_object
		match node_data["node"]:
			"tile":
				new_object = preload("res://scenes/models/tile.tscn").instantiate()
				earth.add_child(new_object)
				new_object.position = Vector3(node_data["pos_x"], node_data["pos_y"], node_data["pos_z"])
				new_object.add_to_group("Persistent")
				new_object.update_tile()
			"worldinfo":
				world_info = node_data
				world_info["node"] = null
				continue
		for i in node_data.keys():
			if i == "node" or "pos" in i:
				continue
			new_object.set(i, node_data[i])
	await get_tree().physics_frame
	earth.mark_empty_tiles()