package main

import "core:math"
import gpu "../.."
import app "../../app"

main :: proc() {
	state, ok := app.init_window(800, 600, "GPU - Spinning Cube")
	if !ok {
		return
	}
	defer app.shutdown(&state)

	camera := gpu.default_camera_3d()
	cube := gpu.gen_mesh_cube(1, 1, 1)
	defer gpu.unload_mesh(cube)

	rotation: f32 = 0

	for !app.window_should_close(&state) {
		dt := app.get_frame_time(&state)
		rotation += dt * math.PI * 0.5  // quarter turn per second
		app.update_camera(&state, &camera, .ORBITAL)

		frame := app.begin_frame(&state, gpu.CORNFLOWER_BLUE)
		gpu.set_camera_3d(&frame, camera)

		// Spinning cube (custom transform via draw_mesh)
		transform := gpu.mat4_translate({0, 0.5, 0}) * gpu.mat4_rotate_y(rotation)
		_ = gpu.draw_mesh_instance_frame(&frame, {mesh = cube, transform = transform})

		// Ground plane
		_ = gpu.draw_plane_frame(&frame, {center = {0, 0, 0}, size = {10, 10}})

		// Grid
		_ = gpu.draw_grid_frame(&frame, {slices = 10, spacing = 1})

		// Static shapes
		_ = gpu.draw_sphere_frame(&frame, {center = {-2, 0.5, 0}, radius = 0.5})
		_ = gpu.draw_cube_frame(&frame, {center = {2, 0.25, 0}, size = {0.5, 0.5, 0.5}})

		_ = app.submit_frame(&state, &frame)

		if app.is_key_pressed(&state, .Escape) {
			break
		}
	}
}