from typing import Iterable

from gen_base import gen_runner, gen_typing
from gen_from_tests.gen import generate_from_tests
from importlib import reload, import_module
from eth2spec.config import config_util
from eth2spec.phase0 import spec as spec_phase0
from eth2spec.test.context import PHASE0
from eth2spec.utils import bls


def create_provider(fork_name: str, handler_name: str,
                    tests_src_mod_name: str, config_name: str) -> gen_typing.TestProvider:
    def prepare_fn(configs_path: str) -> str:
        config_util.prepare_config(configs_path, config_name)
        reload(spec_phase0)
        bls.use_milagro()
        return config_name

    def cases_fn() -> Iterable[gen_typing.TestCase]:
        tests_src = import_module(tests_src_mod_name)
        return generate_from_tests(
            runner_name='fork_choice',
            handler_name=handler_name,
            src=tests_src,
            fork_name=fork_name,
        )

    return gen_typing.TestProvider(prepare=prepare_fn, make_cases=cases_fn)


if __name__ == "__main__":
    phase_0_mods = {key: 'eth2spec.test.phase0.fork_choice.test_' + key for key in [
        'get_head',
    ]}

    # TODO: add other configs and forks
    gen_runner.run_generator(f"fork_choice", [
        create_provider(PHASE0, key, mod_name, 'minimal') for key, mod_name in phase_0_mods.items()
    ])