"""
Stats helper (Manual)
=====================

Demonstrates how to display performance statistics such as FPS
and draw time on screen, by manually integrating it into
the render loop.
"""

# sphinx_gallery_pygfx_docs = 'screenshot'
# sphinx_gallery_pygfx_test = 'run'

from rendercanvas.auto import RenderCanvas, loop
import pygfx as gfx
import pylinalg as la

canvas = RenderCanvas()
renderer = gfx.renderers.WgpuRenderer(canvas)

# Show something
scene = gfx.Scene()
camera = gfx.PerspectiveCamera()
box = gfx.Mesh(
    gfx.box_geometry(5, 5, 5),
    gfx.MeshPhongMaterial(color=(0.2, 0.4, 0.6, 1.0)),
)
scene.add(box)
camera.show_object(box, scale=2)

# Let there be ...
scene.add(gfx.AmbientLight())
light = gfx.DirectionalLight()
light.local.position = (0, 0, 1)
scene.add()

# Add stats
stats = gfx.Stats(viewport=renderer)


def animate():
    # Rotate the cube
    rot = la.quat_from_euler((0.005, 0.01), order="XY")
    box.local.rotation = la.quat_mul(rot, box.local.rotation)

    # Track the render time. You can enclose any
    # other piece of code for which you want to see time
    # statistics as well.
    with stats:
        renderer.render(scene, camera, flush=False)
    stats.render()
    canvas.request_draw()


if __name__ == "__main__":
    canvas.request_draw(animate)
    loop.run()