#!/usr/bin/env python3
"""Validate a corpus truth file's internal consistency.

Run: python3 corpus/validate-truth.py corpus/<dir>/rfp.truth.json
These files are hand-authored ground truth, so nothing else checks them.
"""
import json, sys

path = sys.argv[1] if len(sys.argv) > 1 else 'friendship-pcs/rfp.truth.json'
t = json.load(open(path))
errs, warns = [], []

crit = {c['id']: c for c in t['criteria']}
reqs = {r['id']: r for r in t['requirements']}
kms  = {k['id']: k for k in t['knownMisses']}
nest = t['criteriaNotes']['nestingIsInconsistent']

for r in t['requirements']:
    for cid in r.get('criterionIds', []):
        if cid not in crit: errs.append(f"{r['id']} -> unknown criterion {cid}")
    if 'knownMissId' in r and r['knownMissId'] not in kms:
        errs.append(f"{r['id']} -> unknown knownMiss {r['knownMissId']}")

for k in t['knownMisses']:
    if k['requirementId'] not in reqs:
        errs.append(f"{k['id']} -> unknown requirement {k['requirementId']}")

for c in t['criteria']:
    if c['parentId'] and c['parentId'] not in crit:
        errs.append(f"{c['id']} -> unknown parent {c['parentId']}")

for pid in nest['weightedParents']:
    kids = [c for c in t['criteria'] if c['parentId'] == pid]
    s = sum(c['maxPoints'] for c in kids)
    if s != crit[pid]['maxPoints']:
        errs.append(f"{pid}: children sum {s} != parent {crit[pid]['maxPoints']}")
    else:
        print(f"  ok   {pid:14} weighted children sum {s} == parent")

for pid in nest['guidanceOnlyParents']:
    kids = [c for c in t['criteria'] if c['parentId'] == pid]
    if kids: errs.append(f"{pid} declared guidance-only but has {len(kids)} child criteria")
    else: print(f"  ok   {pid:14} guidance-only, no child criteria")

top = sum(c['maxPoints'] for c in t['criteria'] if c['parentId'] is None)
tot = t['criteriaNotes']['totalPoints']
print(f"  {'ok  ' if top == tot else 'ERR '} top-level points sum {top} vs declared {tot}")
if top != tot: errs.append(f"top-level sum {top} != {tot}")

pts = sorted(a['points'] for a in t['ratingScale']['anchors'])
if pts != list(range(t['ratingScale']['min'], t['ratingScale']['max'] + 1)):
    errs.append(f"rating scale not contiguous: {pts}")
else:
    print(f"  ok   rating scale {pts[0]}-{pts[-1]}, {len(pts)} anchors")

# The scoring-level rule, mirrored from src/scoring/routing.ts: a score commits
# at any criterion with NO WEIGHTED CHILDREN. Printed so the corpus and the code
# cannot silently disagree about which criteria a committee actually scores.
scoreable = [c for c in t['criteria']
             if not any(k['parentId'] == c['id'] and (k.get('maxPoints') or 0) > 0
                        for k in t['criteria'])]
sc_total = sum(c['maxPoints'] for c in scoreable)
print(f"  ok   scoreable criteria {len(scoreable)} of {len(t['criteria'])}, "
      f"points sum {sc_total}")
if sc_total != tot:
    errs.append(f"scoreable points sum {sc_total} != declared total {tot}")
print("       " + ", ".join(f"{c['id']}({c['maxPoints']})" for c in scoreable))

mapped = {c for r in t['requirements'] for c in r.get('criterionIds', [])}
for cid, c in crit.items():
    kids = [x for x in t['criteria'] if x['parentId'] == cid]
    if cid not in mapped and not kids:
        warns.append(f"criterion {cid} ({c['label'][:38]}) has no requirement mapped — unscoreable")

sec = {s['mapsToCriterion'] for s in t['bindingMechanism']['requiredSections']} - {None}
for cid in sec:
    if cid not in crit: errs.append(f"bindingMechanism section -> unknown criterion {cid}")

gates = [r for r in t['requirements'] if r['kind'] == 'mandatory_gate']
kinds = {}
for r in t['requirements']: kinds[r['kind']] = kinds.get(r['kind'], 0) + 1
print(f"\n  requirements {len(t['requirements'])}  criteria {len(t['criteria'])}  knownMisses {len(t['knownMisses'])}")
print(f"  by kind: " + ", ".join(f"{k}={v}" for k, v in sorted(kinds.items())))
for w in warns: print(f"  WARN {w}")
for e in errs: print(f"  ERR  {e}")
print("\nVALID" if not errs else "\nINVALID")
sys.exit(1 if errs else 0)