#!/usr/bin/env python3
"""Structural-path full-corpus harness (render48k, 48000/4096 internal grid).

Mirrors scripts/corpus.py but drives dsp/build/render48k (structural
FUN_180529fe0 chain on the internal grid) instead of framed_test (bridge).
Purpose: honest per-group comparison of the structural chain against the
committed bridge baseline (BITEXACT_PLAN step-1 criterion: structural must
not regress below bridge on single-band groups).

Usage:
  python3 scripts/corpus_structural.py [--out results.json]
  python3 scripts/corpus_structural.py --vs-bridge scripts/baseline_bridge.json
"""
import json, sys

sys.path.insert(0, 'scripts')
import corpus

corpus.RB = '/home/m/re-tools/dsp/build/render48k'

_orig_build_cases = corpus.build_cases


def build_cases_structural():
    cases = []
    for name, inp, args, ref, f in _orig_build_cases():
        # render48k parses only comma-form band args; join split dual args.
        joined = [','.join(args)] if len(args) == 3 else args
        cases.append((name, inp, joined, ref, f))
    return cases


corpus.build_cases = build_cases_structural

if __name__ == '__main__':
    a = sys.argv[1:]
    if a and a[0] == '--vs-bridge':
        base = json.load(open(a[1]))
        res, _ = corpus.run_all()
        bs, cs = corpus.group_stats(base), corpus.group_stats(res)
        print(f'{"group":>12} {"n":>3} {"bridge":>8} {"struct":>8} {"d":>8} {"max":>7}')
        for g in ['t1kq', 't1k', 'al', 'res', 'dual', 'comb', 'TOTAL']:
            if g not in cs:
                continue
            b = bs.get(g, {'mean_abs': float('nan')})['mean_abs']
            s = cs[g]
            print(f'{g:>12} {s["n"]:>3} {b:>8.3f} {s["mean_abs"]:>8.3f} '
                  f'{s["mean_abs"] - b:>+8.3f} {s["max_abs"]:>7.3f}')
        sys.exit(0)
    sys.exit(corpus.main())