#!/usr/bin/python3
"""Simple demo of oscillating colors."""
import lumiversepython
import random
import time

def get_all_lights(rig):
    """Return a list of all panels."""
    return [rig.select('$panel={}'.format(i)) for i in range(32)]


def restrict(low, x, high):
    """Return a value low <= v <= high, and equal to x if possible."""
    return max(low, min(x, high))


def random_change():
    """Return a random amount that a light should change each frame."""
    return random.random() / 30


def demo(lights, rig):
    """Do some light things."""
    light_status = [
        {
            'is_increasing': True,
            'change': random_change(),
            'light': light,
            'current_value': 0,
        }
            for light in lights
    ]
    while True:
        for light_s in light_status:
            is_increasing = light_s['is_increasing']
            change = light_s['change']
            light = light_s['light']
            current_value = light_s['current_value']
            new_value = restrict(
                0, current_value + change * (int(is_increasing) * 2 - 1), 1), 1
            )
            light.setRGBRaw(0, 0, new_value)
            light_s['current_value'] = new_value
            if new_value == 1:
                light_s['is_increasing'] = not is_increasing
                light_s['change'] = random_change()
        rig.updateOnce()
        time.sleep(1 / 60)


def main():
    """Run show."""
    rig = lumiversepython.Rig('/home/teacher/Lumiverse/PBridge.rig.json')
    rig.init()
    lights = get_all_lights(rig)
    demo(lights, rig)

if __name__ == '__main__':
    main()