#!/usr/bin/env python3
"""Validate a privacy-safe legacy bootstrap quiescence receipt."""

from __future__ import annotations

import argparse
import asyncio
import importlib.util
import json
import sys
from pathlib import Path


SCRIPT_DIR = Path(__file__).resolve().parent
INITIALIZER = SCRIPT_DIR / "initialize-public-runtime-upload-root.py"


async def _current_database_target_sha256() -> str:
    import asyncpg

    from app.config import settings
    from public_runtime_database_identity import connected_database_target_sha256

    connection = await asyncpg.connect(
        settings.database_url, command_timeout=settings.db_command_timeout
    )
    try:
        async with connection.transaction(isolation="repeatable_read", readonly=True):
            return await connected_database_target_sha256(connection)
    finally:
        await connection.close()


def _load_initializer():
    spec = importlib.util.spec_from_file_location(
        "vignette_upload_initializer_contract", INITIALIZER
    )
    if spec is None or spec.loader is None:
        raise RuntimeError("offline_quiescence_validator_unavailable")
    module = importlib.util.module_from_spec(spec)
    sys.modules[spec.name] = module
    spec.loader.exec_module(module)
    return module


def main() -> int:
    parser = argparse.ArgumentParser()
    parser.add_argument("--receipt-path", required=True)
    parser.add_argument("--expected-receipt-sha256", required=True)
    parser.add_argument("--manifest-path", required=True)
    parser.add_argument("--expected-manifest-sha256", required=True)
    parser.add_argument("--stable-source-root", required=True)
    parser.add_argument("--upload-root", required=True)
    parser.add_argument("--expected-legacy-source-commit", required=True)
    parser.add_argument("--expected-legacy-source-tree", required=True)
    args = parser.parse_args()
    module = _load_initializer()
    try:
        manifest_path = module._validated_regular_file(Path(args.manifest_path))
        if module.sha256_file(manifest_path) != args.expected_manifest_sha256:
            raise module.InitializationError("manifest_hash_drift")
        manifest = json.loads(manifest_path.read_text(encoding="utf-8"))
        offline = manifest.get("offline_quiescence") if isinstance(manifest, dict) else None
        if not isinstance(offline, dict) or set(offline) != {
            "receipt_sha256",
            "database_target_sha256",
            "source_root_sha256s",
            "source_root_set_sha256",
            "preserved_object_count",
            "preserved_total_size_bytes",
            "preserved_inventory_sha256",
            "preserved_decode_valid_count",
            "preserved_decode_invalid_count",
            "required_decode_invalid_object_count",
            "required_decode_invalid_reference_count",
            "reference_count",
            "unique_object_count",
            "reference_set_sha256",
        }:
            raise module.InitializationError("manifest_offline_quiescence_missing")
        if offline.get("receipt_sha256") != args.expected_receipt_sha256:
            raise module.InitializationError("manifest_quiescence_receipt_drift")
        proof = module.validate_offline_quiescence_receipt(
            receipt_path=Path(args.receipt_path),
            expected_receipt_sha256=args.expected_receipt_sha256,
            stable_source_root=Path(args.stable_source_root),
            upload_root=Path(args.upload_root),
            expected_source_commit=args.expected_legacy_source_commit,
            expected_source_tree=args.expected_legacy_source_tree,
            expected_source_roots=None,
            expected_source_root_sha256s=offline.get("source_root_sha256s"),
            expected_source_root_set_sha256=offline.get(
                "source_root_set_sha256"
            ),
            expected_database_target_sha256=asyncio.run(
                _current_database_target_sha256()
            ),
            expected_preserved_object_count=offline.get(
                "preserved_object_count"
            ),
            expected_preserved_total_size_bytes=offline.get(
                "preserved_total_size_bytes"
            ),
            expected_preserved_inventory_sha256=offline.get(
                "preserved_inventory_sha256"
            ),
            expected_preserved_decode_valid_count=offline.get(
                "preserved_decode_valid_count"
            ),
            expected_preserved_decode_invalid_count=offline.get(
                "preserved_decode_invalid_count"
            ),
            expected_required_decode_invalid_object_count=offline.get(
                "required_decode_invalid_object_count"
            ),
            expected_required_decode_invalid_reference_count=offline.get(
                "required_decode_invalid_reference_count"
            ),
            expected_reference_count=offline.get("reference_count"),
            expected_unique_object_count=offline.get("unique_object_count"),
            expected_reference_set_sha256=offline.get("reference_set_sha256"),
        )
        if list(proof.source_root_sha256s) != offline.get(
            "source_root_sha256s"
        ) or proof.source_root_set_sha256 != offline.get(
            "source_root_set_sha256"
        ):
            raise module.InitializationError("manifest_legacy_source_root_drift")
    except (OSError, ValueError, module.InitializationError):
        print(
            json.dumps(
                {"status": "failed", "reason": "offline_quiescence_contract_failed"},
                ensure_ascii=True,
                separators=(",", ":"),
            )
        )
        return 1
    except Exception:
        print(
            json.dumps(
                {"status": "failed", "reason": "offline_quiescence_validation_unavailable"},
                ensure_ascii=True,
                separators=(",", ":"),
            )
        )
        return 1
    print(
        json.dumps(
            {
                "status": "passed",
                "receipt_sha256": proof.receipt_sha256,
                "database_target_sha256": proof.database_target_sha256,
                "source_root_set_sha256": proof.source_root_set_sha256,
                "preserved_object_count": proof.preserved_object_count,
                "preserved_total_size_bytes": proof.preserved_total_size_bytes,
                "preserved_inventory_sha256": proof.preserved_inventory_sha256,
                "preserved_decode_valid_count": (
                    proof.preserved_decode_valid_count
                ),
                "preserved_decode_invalid_count": (
                    proof.preserved_decode_invalid_count
                ),
                "required_decode_invalid_object_count": (
                    proof.required_decode_invalid_object_count
                ),
                "required_decode_invalid_reference_count": (
                    proof.required_decode_invalid_reference_count
                ),
                "reference_count": proof.reference_count,
                "unique_object_count": proof.unique_object_count,
                "reference_set_sha256": proof.reference_set_sha256,
                "listener_absent": True,
                "tunnel_absent": True,
            },
            ensure_ascii=True,
            separators=(",", ":"),
        )
    )
    return 0


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