.{math, log, string, random, buffer, memory} := @use("../../stn/src/lib.hb");
.{Color, Surface, new_surface, put_surface, sync} := @use("../../render/src/lib.hb");
.{Channel, Window, WindowProps, WindowData, MessageHeader, BUFFER_SERVER, BUFFER_CLIENT, message, permissions, recv_header, recv_message, send_message, send_header, await_message} := @use("./lib.hb")

WindowServer := struct {
	window_count: uint,
	channel: Channel,
	// ! replace this with an actual collection when we get an allocator
	windows: [?WindowData; 10],
}

// ! in the future this should be safely handled
server := @as(WindowServer, idk)

start := fn(): void {
	server = .(0, .{client: buffer.create(BUFFER_CLIENT), server: buffer.create(BUFFER_SERVER)}, .(null, null, null, null, null, null, null, null, null, null))
	log.info("server: started server\0")
}

incoming := fn(): bool {
	msg := recv_header(server.channel.server)
	if msg == null {
		return true
	}
	if msg.kind == message.syn {
		log.info("server: recv syn\0")
		channel := Channel.(buffer.create_nameless(), buffer.create_nameless())
		send_message(Channel, message.ack, channel, channel.client)
		props := await_message(WindowProps, channel.server)
		if props.header.kind != message.props {
			return true
		}
		log.info("server: recv props\0")
		// ! do inspection of requested props here
		send_message(WindowData, message.ack, .(props.body, channel, permissions.default), channel.client)
	}
	return true
}

render_clients := fn(screen: Surface): void {
	i := 0
	loop if i == 10 break else {
		window := server.windows[i]
		if window == null {
			continue
		}
		header := recv_header(window.channel.server)
		if header == null | @unwrap(header).kind != message.frame_ready {
			continue
		}
		send_header(message.ack, window.channel.client)
		ptr := await_message(^Color, window.channel.server)
		if ptr.header.kind != message.ack {
			continue
		}
		put_surface(screen, .(ptr.body, window.props.dimensions.x, window.props.dimensions.y, window.props.dimensions.x * window.props.dimensions.y), window.props.position, false)
		i += 1
	}
	sync(screen)
}