.{math: .{Vec2}, buffer, memory} := @use("../../stn/src/lib.hb");
.{Surface} := @use("../../render/src/lib.hb")

$BUFFER := "sunset\0"

client := @use("./client.hb")
server := @use("./server.hb")
message := @use("./message.hb")

receive_message := fn($Expr: type, buffer_id: uint): ?Expr {
	recv := @as(?Expr, null)
	buffer.recv(?Expr, buffer_id, &recv)
	return recv
}

send_message := fn($Expr: type, msg: Expr, buffer_id: uint): void {
	buffer.write(?Expr, buffer_id, &@as(?Expr, msg))
}

await_buffer := fn(name: ^u8): uint {
	id := 0
	loop if id != 0 return id else id = buffer.search(BUFFER)
}

await_message := fn($Expr: type, buffer_id: uint): Expr {
	response := @as(?Expr, null)
	loop {
		buffer.recv(?Expr, buffer_id, &response)
		if response != null {
			i := 0
			return @as(Expr, response)
		}
	}
}

// ! we need a better message format but this will do for now.
// enums would be nice
MessageHeader := packed struct {
	kind: uint,
	data: uint,
}

WindowProps := struct {
	position: Vec2(uint),
	dimensions: Vec2(uint),
	// ! replace with owned string type later
	title: ^u8,
}

WindowData := struct {
	props: WindowProps,
	buffer_id: uint,
}

Window := struct {
	data: WindowData,
	surface: Surface,
}