"""Find body byte ranges that look like absolute int8 sample data (smooth waveform)."""
import sys
sys.path.insert(0, ".")
from analysis.load_bundle import load_bundle


def looks_like_smooth_int8(buf):
    """Convert bytes to int8 and check if successive deltas are small (waveform-like)."""
    if len(buf) < 8:
        return 0.0
    vals = [b if b < 128 else b - 256 for b in buf]
    diffs = [abs(vals[i+1] - vals[i]) for i in range(len(vals)-1)]
    avg_diff = sum(diffs) / len(diffs)
    return avg_diff


def main():
    for name in ("event-a", "event-c"):
        b = load_bundle(name)
        body = b.body
        # Scan with sliding window of 64 bytes; find segments where the bytes look like a smooth wave
        win = 64
        scores = []
        for i in range(len(body) - win):
            scores.append((i, looks_like_smooth_int8(body[i:i+win])))
        # Lowest avg_diff means smoothest
        scores.sort(key=lambda x: x[1])
        print(f"\n=== {name} (body={len(body)}) — smoothest 10 windows ===")
        for off, s in scores[:10]:
            print(f"  +{off:>5}  avg_diff={s:.2f}  bytes={body[off:off+24].hex(' ')}")


if __name__ == "__main__":
    main()