#!/usr/bin/env python3
#
#  Copyright (c) 2020, The OpenThread Authors.
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import importlib.util
import inspect
import json
import logging
import os
import sys

THREAD_CERT_DIR = './tests/scripts/thread-cert'
sys.path.append(THREAD_CERT_DIR)

import thread_cert
from pktverify.packet_verifier import PacketVerifier

logging.basicConfig(level=logging.INFO,
                    format='File "%(pathname)s", line %(lineno)d, in %(funcName)s\n'
                    '%(asctime)s - %(levelname)s - %(message)s')


def main():
    json_file = sys.argv[1]
    with open(json_file, 'rt') as fp:
        test_info = json.load(fp)

    script = test_info['script']

    script = os.path.relpath(script, THREAD_CERT_DIR)

    module_name = os.path.splitext(script)[0].replace('/', '.')
    logging.info("Loading %s as module %s ...", script, module_name)

    spec = importlib.util.spec_from_file_location(module_name, os.path.join(THREAD_CERT_DIR, script))
    mod = importlib.util.module_from_spec(spec)
    spec.loader.exec_module(mod)

    test_class = None

    for name, member in inspect.getmembers(mod):
        if isinstance(member, type) and issubclass(member, thread_cert.TestCase):
            assert test_class is None, (test_class, member)
            test_class = member

    assert test_class is not None, "can not find a test class in %s" % script

    test_instance = test_class()

    pv = PacketVerifier(json_file)
    pv.add_common_vars()
    test_instance.verify(pv)

    print("Packet verification passed: %s" % json_file, file=sys.stderr)


if __name__ == '__main__':
    main()