"""Find where decoded-vs-sidecar diverges for each channel."""
from __future__ import annotations
import sys
from pathlib import Path

REPO = Path(__file__).resolve().parents[1]
sys.path.insert(0, str(REPO))

from minimateplus.waveform_codec import decode_waveform_v2
from analysis_idf.recon import TARGET, TXT, load_sidecar_samples


def main():
    buf = TARGET.read_bytes()
    sc = load_sidecar_samples(TXT)
    decoded = decode_waveform_v2(buf[0x0f1f:])
    GEO_LSB = 0.0003

    for ch in ("Tran", "Vert", "Long"):
        sc_counts = [int(round(v / GEO_LSB)) for v in sc[ch]]
        dec = decoded[ch]
        # Find ALL transitions where mismatches start/stop
        first_diff = next((i for i in range(len(dec)) if dec[i] != sc_counts[i]), None)
        if first_diff is None:
            print(f"{ch}: NO MISMATCHES")
            continue
        print(f"{ch}: first diff at idx {first_diff}")
        # Show 5 before, 5 after
        for i in range(max(0, first_diff - 3), min(len(dec), first_diff + 8)):
            mark = "  " if dec[i] == sc_counts[i] else "**"
            print(f"  {mark} idx {i:4d}: sc={sc_counts[i]:6d}  dec={dec[i]:6d}  diff={dec[i]-sc_counts[i]:+d}")
        # Where does cumulative diff exceed 100?
        cum_match_run = 0
        max_match_run = 0
        match_run_start = 0
        diff_count = 0
        for i in range(len(dec)):
            if dec[i] == sc_counts[i]:
                cum_match_run += 1
                max_match_run = max(max_match_run, cum_match_run)
            else:
                cum_match_run = 0
                diff_count += 1
        print(f"  total mismatches: {diff_count}/{len(dec)}, longest run of matches: {max_match_run}")
        print()


if __name__ == "__main__":
    main()