#!/usr/bin/env python3
"""Validate any design engine adapter against the kernel-owned output contract."""
import argparse
import json
import os
import sys

import jsonschema
import yaml

HERE = os.path.dirname(os.path.abspath(__file__))
ROOT = os.environ.get("CLAUDE_PROJECT_DIR") or os.path.dirname(os.path.dirname(HERE))
SCHEMA = os.path.join(ROOT, ".claude", "schemas", "design-engine-output.artifact.schema.json")


def main(argv=None):
    parser = argparse.ArgumentParser()
    parser.add_argument("path")
    args = parser.parse_args(argv)
    try:
        with open(args.path, encoding="utf-8") as handle:
            document = yaml.safe_load(handle)
        if isinstance(document, dict) and isinstance(document.get("payload"), dict):
            document = document["payload"]
        with open(SCHEMA, encoding="utf-8") as handle:
            schema = json.load(handle)
        errors = sorted(jsonschema.Draft7Validator(schema).iter_errors(document), key=lambda item: list(item.path))
    except Exception as exc:
        print(f"[design-engine] ERROR: {exc}", file=sys.stderr)
        return 2
    if errors:
        for error in errors:
            location = "/".join(str(value) for value in error.path) or "payload"
            print(f"[design-engine] ERROR {location}: {error.message}", file=sys.stderr)
        return 2
    print(f"[design-engine] OK: {document.get('engine')}")
    return 0


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