from __future__ import annotations

import argparse
import json
import sys
from pathlib import Path


ROOT = Path(__file__).resolve().parents[1]
DEFAULT_PATH = ROOT / "plugins" / "1c" / "metadata" / "examples" / "bsl-modules.example.json"


def validate(data: object, path: Path) -> list[str]:
    errors: list[str] = []
    if not isinstance(data, dict):
        return [f"{path}: snapshot must be a JSON object"]
    if data.get("schema_version") != 1:
        errors.append(f"{path}: schema_version must be 1")
    if not isinstance(data.get("source"), dict) or not data["source"].get("name"):
        errors.append(f"{path}: source.name is required")
    if not data.get("created_at"):
        errors.append(f"{path}: created_at is required")
    modules = data.get("modules")
    if not isinstance(modules, list):
        errors.append(f"{path}: modules must be a list")
        return errors
    for index, module in enumerate(modules):
        prefix = f"{path}: modules[{index}]"
        if not isinstance(module, dict):
            errors.append(f"{prefix}: module must be an object")
            continue
        for field in ("module_id", "object_name", "module_type", "content"):
            if not module.get(field):
                errors.append(f"{prefix}.{field} is required")
        for routine_kind in ("procedures", "functions"):
            for routine_index, routine in enumerate(module.get(routine_kind) or []):
                if not isinstance(routine, dict) or not routine.get("name"):
                    errors.append(f"{prefix}.{routine_kind}[{routine_index}].name is required")
    return errors


def main() -> int:
    parser = argparse.ArgumentParser(description="Validate a 1C BSL module snapshot.")
    parser.add_argument("path", nargs="?", type=Path, default=DEFAULT_PATH)
    args = parser.parse_args()
    with args.path.open("r", encoding="utf-8") as handle:
        data = json.load(handle)
    errors = validate(data, args.path)
    if errors:
        print("1C BSL module snapshot validation failed:", file=sys.stderr)
        for error in errors:
            print(f"- {error}", file=sys.stderr)
        return 1
    print(f"Validated 1C BSL module snapshot: {args.path}")
    return 0


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