"""NeoPixel time-based animation test for the browser simulator."""

from machine import Pin
import neopixel
import time


np = neopixel.NeoPixel(Pin(4), 50)


def wheel(pos: int) -> tuple[int, int, int]:
    """Generate rainbow colors across 0-255 positions."""
    pos = 255 - (pos & 255)
    if pos < 85:
        return (255 - pos * 3, 0, pos * 3)
    if pos < 170:
        pos -= 85
        return (0, pos * 3, 255 - pos * 3)
    pos -= 170
    return (pos * 3, 255 - pos * 3, 0)


print("Starting NeoPixel time test...")
for frame in range(60):
    for i in range(len(np)):
        np[i] = wheel((i * 256 // len(np) + frame * 4) & 255)
    np.write()
    time.sleep(0.08)

np.fill((0, 0, 0))
np.write()
print("NeoPixel time test complete.")