#!/usr/bin/env python3
"""Validate AppBlueprint JSON against the local JSON Schema (Draft 2020-12)."""

from __future__ import annotations

import argparse
import json
import sys
from pathlib import Path

try:
    import jsonschema
    from jsonschema import Draft202012Validator
except ImportError:
    print("请先安装: pip install jsonschema", file=sys.stderr)
    sys.exit(2)


def main() -> int:
    root = Path(__file__).resolve().parents[1]
    parser = argparse.ArgumentParser(description="Validate AppBlueprint")
    parser.add_argument(
        "blueprint",
        nargs="?",
        default=str(root / "examples" / "inventory-ledger.blueprint.json"),
        help="blueprint json path",
    )
    parser.add_argument(
        "--schema",
        default=str(root / "schema" / "app-blueprint.schema.json"),
        help="json schema path",
    )
    args = parser.parse_args()

    schema = json.loads(Path(args.schema).read_text(encoding="utf-8"))
    data = json.loads(Path(args.blueprint).read_text(encoding="utf-8"))

    validator = Draft202012Validator(schema)
    errors = sorted(validator.iter_errors(data), key=lambda e: list(e.path))
    if errors:
        print(f"FAIL: {len(errors)} error(s)")
        for err in errors:
            path = ".".join(str(p) for p in err.path) or "$"
            print(f"  - {path}: {err.message}")
        return 1

    print("OK: blueprint is valid")
    print(f"  app: {data['meta']['name']} ({data['meta']['slug']})")
    print(f"  entities: {len(data['entities'])}")
    print(f"  pages: {len(data['pages'])}")
    print(f"  apis: {len(data['apis']['resources'])}")
    return 0


if __name__ == "__main__":
    sys.exit(main())