#!/usr/bin/env python3
"""Verify this prepared release locally without network access or credentials."""
from __future__ import annotations

import ast
import hashlib
import json
import re
from pathlib import Path, PurePosixPath

ROOT = Path(__file__).resolve().parent


def main() -> None:
    expected = {}
    for line in (ROOT / "SHA256SUMS.txt").read_text(encoding="utf-8").splitlines():
        match = re.fullmatch(r"([0-9a-f]{64})  (.+)", line)
        if not match:
            raise ValueError("Malformed checksum line")
        digest, relative = match.groups()
        path = PurePosixPath(relative)
        if path.is_absolute() or ".." in path.parts or relative in expected:
            raise ValueError("Unsafe or duplicate manifest entry")
        data = (ROOT / relative).read_bytes()
        if hashlib.sha256(data).hexdigest() != digest:
            raise ValueError("Checksum mismatch: " + relative)
        expected[relative] = digest
    counts = {}
    for report in sorted((ROOT / "results" / "recorded").glob("*.json")):
        result = json.loads(report.read_text(encoding="utf-8"))
        if not result["all_checks_passed"] or len(result["checks"]) != result["check_count"]:
            raise ValueError("Inconsistent recorded report: " + report.name)
        counts[report.name] = result["check_count"]
    records = [json.loads(line) for line in (ROOT / "data" / "verification_cases.jsonl")
               .read_text(encoding="utf-8").splitlines()]
    fields = {"case_id", "suite", "kind", "case_name", "passed", "tolerance", "source_report", "details_json"}
    if len(records) != 157 or sum(counts.values()) != 157:
        raise ValueError("Unexpected verification count")
    if len({row["case_id"] for row in records}) != len(records):
        raise ValueError("Duplicate case identifier")
    for row in records:
        if set(row) != fields or not row["passed"]:
            raise ValueError("Unexpected verification row schema/status")
        json.loads(row["details_json"])
    for script in (ROOT / "code").glob("*.py"):
        ast.parse(script.read_text(encoding="utf-8"), filename=str(script))
    provenance = json.loads((ROOT / "release" / "SOURCE_SHA256.json").read_text())
    for relative, digest in provenance.items():
        if hashlib.sha256((ROOT / relative).read_bytes()).hexdigest() != digest:
            raise ValueError("Original research bytes changed: " + relative)
    print(json.dumps({"status": "PASS", "checked_files": len(expected),
                      "recorded_cases": len(records), "suite_counts": counts,
                      "original_research_files_preserved": len(provenance),
                      "network_access_used": False}, indent=2))


if __name__ == "__main__":
    main()