"""Offline checks for the prepared Avenyra Hugging Face repository."""
from __future__ import annotations

import hashlib
import json
import re
from pathlib import Path

import sympy as sp


ROOT = Path(__file__).resolve().parents[1]


def require(condition, message):
    if not condition:
        raise ValueError(message)


def records(path):
    return [json.loads(line) for line in path.read_text(encoding='utf-8').splitlines() if line.strip()]


def read_state(serialized, dimension):
    state = json.loads(serialized)
    require(len(state['x']) == dimension, 'Endpoint dimension mismatch')
    require(len(state['A']) == dimension, 'Matrix dimension mismatch')
    require(all(len(row) == dimension for row in state['A']), 'Matrix row mismatch')
    x = sp.Matrix([sp.Rational(v) for v in state['x']]) if dimension else sp.zeros(0, 1)
    A = sp.Matrix([[sp.Rational(v) for v in row] for row in state['A']]) if dimension else sp.zeros(0)
    require(A.T == -A, 'State operator is not skew')
    return x, A


def main():
    manifest = json.loads((ROOT / 'manifest.json').read_text(encoding='utf-8'))
    files = manifest['files']
    for relative, expected in files.items():
        path = (ROOT / relative).resolve()
        require(path.is_relative_to(ROOT), f'Unsafe manifest path: {relative}')
        require(path.is_file(), f'Missing file: {relative}')
        digest = hashlib.sha256(path.read_bytes()).hexdigest()
        require(digest == expected['sha256'], f'Checksum mismatch: {relative}')
        require(path.stat().st_size == expected['size_bytes'], f'Size mismatch: {relative}')
    checksum_text = ''.join(f"{entry['sha256']}  {relative}\n" for relative, entry in files.items())
    require((ROOT / 'SHA256SUMS.txt').read_text(encoding='utf-8') == checksum_text, 'Checksum manifests disagree')

    claims = records(ROOT / 'data/claims.jsonl')
    source_path = ROOT / 'manuscript/Avenyra_Area_Feedback_v1.0.0.tex'
    source = source_path.read_text(encoding='utf-8')
    labels = set(re.findall(r'\\label\{([^}]+)\}', source))
    matches = list(re.finditer(
        r'\\begin\{(theorem|proposition|lemma|corollary|conjecture)\}'
        r'(?:\[([^\]]*)\])?\s*(.*?)\\end\{\1\}', source, re.S))
    require(len(claims) == len(matches) == manifest['claim_records'], 'Claim count mismatch')
    require(len({row['claim_id'] for row in claims}) == len(claims), 'Duplicate claim IDs')
    required_claim_fields = {'claim_id','title','environment','component','status','statement_latex','proof_latex',
                             'references_in_statement_or_proof','source_file','proof_audit_file',
                             'priority_status','verification_limit'}
    for row, match in zip(claims, matches):
        require(set(row) == required_claim_fields, 'Claim schema mismatch')
        require(row['statement_latex'] == match.group(3).strip(), 'Claim statement differs from source')
        require(row['claim_id'] in labels, 'Missing source label')
        require(row['environment'] == match.group(1), 'Environment mismatch')
        require(row['title'] == (match.group(2) or row['claim_id']), 'Claim title mismatch')
        proof_match = re.match(r'\s*(?:\\subsection\{[^}]*\}\s*)?\\begin\{proof\}\s*(.*?)\\end\{proof\}', source[match.end():], re.S)
        actual_proof = proof_match.group(1).strip() if proof_match else ''
        require(row['proof_latex'] == actual_proof, 'Claim proof differs from source')
        expected_status = 'conjecture' if match.group(1) == 'conjecture' else 'manuscript_proved'
        require(row['status'] == expected_status, 'Proof status mismatch')
        require(bool(actual_proof) or expected_status == 'conjecture', 'Statement lacks its claimed proof')
        require(set(row['references_in_statement_or_proof']) <= labels, 'Unresolved extracted reference')
        for field in ['source_file', 'proof_audit_file']:
            require((ROOT / row[field]).is_file(), 'Claim evidence file missing')

    examples = records(ROOT / 'data/worked_examples.jsonl')
    require(len(examples) == manifest['example_records'] == 8, 'Example count mismatch')
    require(len({row['example_id'] for row in examples}) == len(examples), 'Duplicate example IDs')
    required_example_fields = {'example_id','dimension','initial_state_json','controls_json','all_controls_legal',
                               'first_illegal_step','final_legal_prefix_state_json','final_rank','final_rho_squared',
                               'note','source_file'}
    for row in examples:
        require(set(row) == required_example_fields, 'Example schema mismatch')
        d = row['dimension']
        x, A = read_state(row['initial_state_json'], d)
        blocked = 0
        for i, displacement in enumerate(json.loads(row['controls_json']), 1):
            require(len(displacement) == d, 'Control dimension mismatch')
            a = sp.Matrix([sp.Rational(v) for v in displacement]) if d else sp.zeros(0,1)
            if A * a != sp.zeros(d,1):
                blocked = i
                break
            updated_A = A + x*a.T - a*x.T
            x = x + a
            A = updated_A
        expected_x, expected_A = read_state(row['final_legal_prefix_state_json'], d)
        require(x == expected_x and A == expected_A, f"Final state differs: {row['example_id']}")
        require(blocked == row['first_illegal_step'], 'Gate-failure index mismatch')
        require((blocked == 0) == row['all_controls_legal'], 'Gate-status mismatch')
        require(int(A.rank()) == row['final_rank'], 'Rank mismatch')
        null_vectors = A.nullspace()
        if d == 0:
            squared_radius = sp.Integer(0)
        else:
            if null_vectors:
                N = sp.Matrix.hstack(*null_vectors)
                w = N * (N.T*N).inv() * N.T*x
            else:
                w = sp.zeros(d,1)
            u = x-w
            squared_radius = sp.factor((u.T*u)[0])
        require(squared_radius == sp.Rational(row['final_rho_squared']), 'Projection-radius mismatch')

    card = (ROOT / 'README.md').read_text(encoding='utf-8')
    require(card.startswith('---\n'), 'Dataset card lacks YAML metadata')
    metadata = card.split('---',2)[1]
    require('config_name: claims' in metadata and 'config_name: worked_examples' in metadata, 'Dataset configs missing')
    try:
        import yaml
    except ImportError:
        yaml_status = 'not installed; basic metadata checks only'
    else:
        parsed = yaml.safe_load(metadata)
        require(parsed['language'] == ['en'], 'Unexpected language metadata')
        require(len(parsed['configs']) == 2, 'Unexpected dataset config count')
        require(sum(bool(c.get('default',False)) for c in parsed['configs']) == 1, 'Default config mismatch')
        for config in parsed['configs']:
            for data_file in config['data_files']:
                require((ROOT/data_file['path']).is_file(), 'Missing configured dataset file')
        yaml.safe_load((ROOT/'CITATION.cff').read_text(encoding='utf-8'))
        yaml_status = 'parsed successfully'

    for path in ROOT.rglob('*.md'):
        for target in re.findall(r'\]\(([^)]+)\)', path.read_text(encoding='utf-8')):
            if re.match(r'^[a-zA-Z][a-zA-Z0-9+.-]*:', target) or target.startswith('#'):
                continue
            target_path = (path.parent/target.split('#',1)[0]).resolve()
            require(target_path.is_relative_to(ROOT) and target_path.exists(), f'Broken local link: {path.name}: {target}')
    print(json.dumps({'status':'PASS','checksummed_files':len(files),'claims':len(claims),
                      'worked_examples':len(examples),'yaml_metadata':yaml_status,
                      'scope':'Package integrity, exact extraction, local references, and finite exact examples; not universal proof or priority certification.'}, indent=2))


if __name__ == '__main__':
    main()