"""The wave gate driver — the S49 practice, paid for in two incidents (cookbook §169 law 3).

Usage: tools/gate_lane.py <wavedir> <slate-or-confirmed.json> [results.json]
Accepts either shape (`name` or `fn` per record) and takes an explicit `draft` path when present.

The contract, and why each clause exists:
  - group drafts by (binary, destination split .c)
  - gate_stage --no-propagate --commit, NO outer timeout (the tool owns its own)
  - revert any residue between groups; abort loudly if the tree is dirty at entry
  - propagate PER FUNCTION afterwards, committing each
Usage: gate_lane.py <wavedir> <slate.json> [results.json]"""
import json, os, shutil, subprocess, sys, collections, glob
sys.path.insert(0,'tools'); import corpus
wavedir, slate = sys.argv[1], sys.argv[2]
outp = sys.argv[3] if len(sys.argv)>3 else '.run/gate_lane_results.json'
raw=[c for c in json.load(open(slate)) if isinstance(c,dict) and (c.get('name') or c.get('fn'))]
cards=[dict(c, name=c.get('name') or c.get('fn')) for c in raw]     # accept slate OR confirmed shape
if not cards: sys.exit(f"R32: {slate} yielded 0 usable records — wrong shape?")
def dirty(): return subprocess.run("git status --porcelain -- src/ config/",shell=True,
                                   capture_output=True,text=True).stdout.strip()
def writers(): return subprocess.run("pgrep -af 'dedup_propagate|gate_stage|harvest_verify'",
                                     shell=True,capture_output=True,text=True).stdout
if dirty(): sys.exit("TREE DIRTY at entry — resolve before gating:\n"+dirty()[:400])
groups=collections.defaultdict(list)
for c in cards:
    p=c.get('draft') or f"{wavedir}/{c['name']}/{c['name']}.c"   # explicit path wins (agents use per-binary dirs)
    if not os.path.isfile(p): continue
    src=None
    for f in sorted(glob.glob(f"src/{c['binary']}/*.c")):
        t=open(f).read()
        if "INCLUDE_ASM" in t and c['name'] in t: src=f; break
    groups[(c['binary'],src)].append((c['name'],p))
n_g=sum(len(v) for v in groups.values())
missing=[c['name'] for c in cards if not os.path.isfile(c.get('draft') or f"{wavedir}/{c['name']}/{c['name']}.c")]
if n_g != len(cards):   # R32: a silent skip is a DEFECT, not a no-op
    print(f"R32 COVERAGE: {len(cards)} records -> {n_g} gateable; {len(missing)} missing drafts: {missing[:8]}", flush=True)
    if n_g == 0: sys.exit("R32: nothing gateable — refusing to report 0 as a result")
print(f"gating {n_g} drafts in {len(groups)} groups", flush=True)
banked=[]; res={}
for (b,src),items in sorted(groups.items()):
    if dirty():
        subprocess.run("git checkout -- src/ config/",shell=True); print("  (reverted residue)",flush=True)
    d=f".run/gate_lane/{b}__{os.path.basename(src or 'x')}"
    shutil.rmtree(d,ignore_errors=True); os.makedirs(d,exist_ok=True)
    for n,p in items: shutil.copy(p,f"{d}/{n}.c")
    sub=os.path.dirname(corpus.asm_path(b,items[0][0]) or "")
    cmd=[".venv/bin/python","tools/gate_stage.py","--drafts",d,"--binary",b,"--no-propagate","--commit"]
    if src: cmd+=["--src",src,"--src-file",src]
    if sub: cmd+=["--asm-subdir",sub]
    r=subprocess.run(cmd,capture_output=True,text=True)          # NO outer timeout (§169 law 3)
    js=[l for l in (r.stdout+r.stderr).splitlines() if l.startswith('{')]
    v=json.loads(js[-1]) if js else {}
    got=v.get('verified',[]); banked+=got
    print(f"  {b:14} {os.path.basename(src or ''):34} {len(items)}d -> {len(got)} banked", flush=True)
    res[f"{b}:{src}"]=v
    json.dump(res,open(outp,'w'),indent=1)
if dirty(): subprocess.run("git checkout -- src/ config/",shell=True)
print(f"\nBANKED {len(banked)}: {banked}", flush=True)
json.dump(banked,open(outp.replace('.json','_banked.json'),'w'))
# propagate per function
for fn in banked:
    addr="0x"+fn.split("_")[1].lower()
    r=subprocess.run([".venv/bin/python","tools/dedup_propagate.py","--addr",addr],
                     capture_output=True,text=True)
    if dirty():
        subprocess.run("git add src/ config/",shell=True)
        subprocess.run(f'git commit -q -m "feat(phase-30 S49): propagate {fn} (adapt lane)"',shell=True)
        print(f"  prop {fn}: committed", flush=True)
print("DONE", flush=True)