stn := @use("../../../libraries/stn/src/lib.hb");
.{string, memory, buffer, random, log} := stn;
.{Vec2} := stn.math

horizon_api := @use("../../../libraries/horizon_api/src/lib.hb");
.{new_label, render_label_to_surface, set_label_text} := horizon_api.widgets.label;
.{sexpr_parser, render_ui} := horizon_api.ui

render := @use("../../../libraries/render/src/lib.hb");
.{Surface} := render;
.{Font} := render.text

intouch := @use("../../../libraries/intouch/src/lib.hb")

Window := struct {
	// TODO: Replace this with widgets
	implicit_framebuffer: render.Surface,
	width: int,
	height: int,
	x: int,
	y: int,
}

psf := @embed("../../../assets/consolefonts/tamsyn/10x20r.psf")
img := @embed("../../../assets/wallpaper.qoi")

main := fn(): int {
	win_buff := buffer.create("XHorizon\0")

	screen := render.init(true)

	// Clear the screen to black.
	render.clear(screen, render.black)

	wallpaper := render.image.from(@bitcast(&img))
	if wallpaper == null {
		return 1
	}

	window := render.new_surface(screen.width / 3, screen.height / 3)

	mem_buf := memory.request_page(1)
	color := random.any(render.Color)
	side := window.width / 8

	// really we should null check but it is a bit broked
	font := @unwrap(render.text.font_from_psf2(@bitcast(&psf), false))

	mouse_x := @as(i16, 0)
	mouse_y := @as(i16, 0)
	text_label := new_label("Hi\0")

	// widgets := "()\0"
	// ui := sexpr_parser(widgets)

	loop {
		// Clear the screen
		render.clear(screen, render.black)
		render.put_surface(screen, wallpaper, .(0, 0), false)

		// TODO: Read the window buffer here
		{
			// ret := buffer.recv([u8; 4096], win_buff, mem_buf)
			// for some reason this null check causes the compiler to spin forever
			// if ret == null {
			// 	log.info("No messages\0")
			// } else {
			// 	log.info("Handle Messages\0")
			// }
		}

		// get input events from drivers via intouch
		// key_event := intouch.recieve_key_event();
		// log.info("before mouse event check\0");

		if false {
			// Scroll bar :ThumbsUp:
			render.put_rect(screen, .(100, 100), .(100, 10), render.white)
			render.put_filled_rect(screen, .(110, 100), .(20, 10), render.white)

			render.put_rect(screen, .(90, 110), .(10, 100), render.white)
			render.put_filled_rect(screen, .(90, 120), .(10, 20), render.white)
		}

		{
			pos := Vec2(uint).(1, screen.height - 21)
			render_label_to_surface(screen, text_label, font, pos)
			render.put_rect(screen, .(0, screen.height - 21), .(screen.width - 1, 20), render.white)
		}

		{
			mouse_event := intouch.recieve_mouse_event()
			//

			if mouse_event != null {
				// log.warn("Mouse event recieved\0")

				change_x := @as(i16, mouse_event.x_change)
				change_x = change_x << 8
				change_x = change_x >> 8

				mouse_x += change_x
				if mouse_x < 0 {
					mouse_x = 0
				}
				if mouse_x >= screen.width - 20 {
					mouse_x = @intcast(screen.width - 21)
				}

				change_y := @as(i16, mouse_event.y_change)
				change_y = change_y << 8
				change_y = change_y >> 8

				if mouse_y < 0 {
					mouse_y = 0
				}
				if mouse_y >= screen.height - 20 {
					mouse_y = @intcast(screen.height - 21)
				}
				mouse_y -= change_y

				if mouse_event.left {
					set_label_text(text_label, "LEFT CLICK\0")
				}
				if mouse_event.middle {
					set_label_text(text_label, "MIDDLE CLICK\0")
				}
				if mouse_event.right {
					set_label_text(text_label, "RIGHT CLICK\0")
				}
			}

			render.put_rect(screen, .(0, 0), .(screen.width - 1, screen.height - 1), render.white)

			// render mouse
			lum := render.indexptr(screen, mouse_x, mouse_y)
			if lum.r / 3 + lum.g / 3 + lum.b / 3 < 128 {
				render.put_rect(screen, .(mouse_x, mouse_y), .(20, 20), render.white)
			} else {
				render.put_rect(screen, .(mouse_x, mouse_y), .(20, 20), render.black)
			}
			// Send events to focused window
		}

		// TODO: Get windows out of a collection and iter through

		// Sync the screen
		render.sync(screen)
	}

	return 0
}