extends GraphEdit

const NODE_SCENE := preload("res://graph_node_renderer/deck_node_renderer_graph_node.tscn")

var deck: Deck = Deck.new()
#var button_node = preload("res://classes/deck/nodes/button.gd")
#var print_node = preload("res://classes/deck/nodes/print.gd")
#var get_var_node = preload("res://classes/deck/nodes/get_deck_var.gd")
#var set_var_node = preload("res://classes/deck/nodes/set_deck_var.gd")

func _ready() -> void:
	var add_button := Button.new()
	add_button.text = "Button"
	var add_print := Button.new()
	add_print.text = "Print"
	var get_var := Button.new()
	get_var.text = "Get Var"
	var set_var := Button.new()
	set_var.text = "Set Var"
	get_zoom_hbox().add_child(add_button)
	get_zoom_hbox().add_child(add_print)
	get_zoom_hbox().add_child(get_var)
	get_zoom_hbox().add_child(set_var)

	var save_btn := Button.new()
	save_btn.text = "Save"
	get_zoom_hbox().add_child(save_btn)
	var load_btn := Button.new()
	load_btn.text = "Load"
	get_zoom_hbox().add_child(load_btn)

	save_btn.pressed.connect(
		func():
			var t = deck.to_json()
			var f := FileAccess.open("user://save_test.json", FileAccess.WRITE)
			f.store_string(t)
	)

	load_btn.pressed.connect(
		func():
			var f := FileAccess.open("user://save_test.json", FileAccess.READ)
			for i in get_children():
				i.queue_free()

			deck = Deck.from_json(f.get_as_text())
			scroll_offset = str_to_vector2(deck.get_meta("offset", ""))

			for node_id in deck.nodes:
				var node_renderer: DeckNodeRendererGraphNode = NODE_SCENE.instantiate()
				node_renderer.node = deck.nodes[node_id]
				add_child(node_renderer)
				node_renderer.position_offset = str_to_vector2(deck.nodes[node_id].get_meta("position_offset", ""))

			for node_id in deck.nodes:
				var node: DeckNode = deck.nodes[node_id]
				var from_node_name = get_children().filter(
					func(c: DeckNodeRendererGraphNode):
						return c.node._id == node_id
				)[0].name
#				"outgoing_connections": {
#					"0": [
#						{
#							"c8cc7dce-2a86-461c-a24f-0a4dbd06f379": 1
#						}
#					]
#				},
				for from_port in node.outgoing_connections:
					for connection in node.outgoing_connections[from_port]:
						var to_node_id = connection.keys()[0]
						var to_node_port = connection.values()[0]
						var to_node_name = get_children().filter(
							func(c: DeckNodeRendererGraphNode):
								return c.node._id == to_node_id
						)[0].name
						prints(from_node_name, to_node_name)
						connect_node(from_node_name, from_port, to_node_name, to_node_port)
	)


	add_button.pressed.connect(
		func():
			var node := NodeDB.instance_node("button")
			deck.add_node_inst(node)
			var node_renderer: DeckNodeRendererGraphNode = NODE_SCENE.instantiate()
			node_renderer.node = node
			add_child(node_renderer)
	)

	add_print.pressed.connect(
		func():
			var node := NodeDB.instance_node("print")
			deck.add_node_inst(node)
			var node_renderer: DeckNodeRendererGraphNode = NODE_SCENE.instantiate()
			node_renderer.node = node
			add_child(node_renderer)
	)

	get_var.pressed.connect(
		func():
			var node := NodeDB.instance_node("get_deck_var")
			deck.add_node_inst(node)
			var node_renderer: DeckNodeRendererGraphNode = NODE_SCENE.instantiate()
			node_renderer.node = node
			add_child(node_renderer)
	)

	set_var.pressed.connect(
		func():
			var node := NodeDB.instance_node("set_deck_var")
			deck.add_node_inst(node)
			var node_renderer: DeckNodeRendererGraphNode = NODE_SCENE.instantiate()
			node_renderer.node = node
			add_child(node_renderer)
	)

	connection_request.connect(attempt_connection)
	disconnection_request.connect(attempt_disconnect)


func attempt_connection(from_node_name: StringName, from_port: int, to_node_name: StringName, to_port: int) -> void:
	var from_node: DeckNode = get_node(NodePath(from_node_name)).node
	var to_node: DeckNode = get_node(NodePath(to_node_name)).node

	var from_output := from_node.get_global_port_idx_from_output(from_port)
	var to_input := to_node.get_global_port_idx_from_input(to_port)

	if deck.connect_nodes(from_node, to_node, from_output, to_input):
		connect_node(from_node_name, from_port, to_node_name, to_port)


func attempt_disconnect(from_node_name: StringName, from_port: int, to_node_name: StringName, to_port: int) -> void:
	var from_node: DeckNode = get_node(NodePath(from_node_name)).node
	var to_node: DeckNode = get_node(NodePath(to_node_name)).node

	var from_output := from_node.get_global_port_idx_from_output(from_port)
	var to_input := to_node.get_global_port_idx_from_input(to_port)

	deck.disconnect_nodes(from_node, to_node, from_output, to_input)

	disconnect_node(from_node_name, from_port, to_node_name, to_port)


func _on_scroll_offset_changed(offset: Vector2) -> void:
	deck.set_meta("offset", offset)


func str_to_vector2(s: String) -> Vector2:
	if s.is_empty():
		return Vector2()

	var san := s.trim_prefix("(").trim_suffix(")").split(",")
	var x := float(san[0])
	var y := float(san[1])
	return Vector2(x, y)