import time
from collections import deque
import Adafruit_ADS1x15

adc = Adafruit_ADS1x15.ADS1115()
GAIN = 1
LSB = 4.096 / 32768.0

buf = deque(maxlen=50)  # ~5s at 10 Hz

def read_v():
    return adc.read_adc(0, gain=GAIN) * LSB

def stats(xs):
    if not xs:
        return 0.0, 0.0, 0.0
    m = sum(xs) / len(xs)
    var = sum((x - m) ** 2 for x in xs) / len(xs)
    return m, min(xs), max(xs), var

print("A0 probe. Expect: calm baseline, slow wave when breathing. Ctrl+C to stop.")
while True:
    v = read_v()
    buf.append(v)
    m, mn, mx, var = stats(list(buf))

    # Bar shows current value relative to recent min/max
    span = (mx - mn) if (mx - mn) > 1e-6 else 1e-6
    norm = (v - mn) / span
    width = 60
    pos = int(max(0, min(1, norm)) * width)
    bar = (" " * pos) + "|" + (" " * (width - pos))

    # "Move" score: higher when it tracks breathing
    print(f"{time.strftime('%H:%M:%S')}  V={v:0.3f}  range={mn:0.3f}-{mx:0.3f}  move={var:0.6f}  [{bar}]")
    time.sleep(0.1)