#!/usr/bin/env python3
# SPDX-License-Identifier: GPL-3.0-or-later
"""Validate Phase-1.0AL against the exact pinned SDK source."""

from __future__ import annotations

import argparse
import hashlib
import json
import subprocess
from pathlib import Path


def digest(path: Path) -> tuple[int, str]:
    data = path.read_bytes()
    return len(data), hashlib.sha256(data).hexdigest()


def main() -> int:
    parser = argparse.ArgumentParser()
    parser.add_argument("--root", type=Path, required=True)
    parser.add_argument("--sdk-root", type=Path, required=True)
    args = parser.parse_args()
    data = json.loads((args.root / "manifests/retroarch/phase-1.0al-mdbg-copy-audit.json").read_text(encoding="utf-8"))
    bindings = data["source_bindings"]
    assert hashlib.sha256((args.root / "manifests/retroarch/phase-1.0ak-hybrid-composition.json").read_bytes()).hexdigest() == bindings["phase10ak_manifest_sha256"]
    sdk_commit = subprocess.run(["git", "rev-parse", "HEAD"], cwd=args.sdk_root,
                                check=True, capture_output=True, text=True).stdout.strip()
    assert sdk_commit == bindings["sdk_commit"]
    for prefix, relative in (("mdbg_c", "crt/mdbg.c"),
                             ("public_header", "include/ps5/mdbg.h")):
        size, sha256 = digest(args.sdk_root / relative)
        assert size == bindings[f"{prefix}_size"]
        assert sha256 == bindings[f"{prefix}_sha256"]
    findings = data["findings"]
    assert findings["target_may_be_partially_mutated_on_error"] is True
    assert findings["return_zero_proves_complete_copy"] is False
    assert findings["monotonic_deadline_present"] is False
    assert not any(data["authorizations"].values())
    assert data["decision"]["direct_sdk_mdbg_copy_reuse_allowed"] is False
    print("Phase-1.0AL mdbg copy audit validation passed")
    return 0


if __name__ == "__main__":
    raise SystemExit(main())