from typing import Iterable

from eth2spec.test.helpers.constants import (
    PHASE0, ALTAIR, BELLATRIX, CAPELLA,
    MINIMAL, MAINNET,
)
from eth2spec.test.helpers.typing import SpecForkName, PresetBaseName
from eth2spec.test.altair.fork import test_altair_fork_basic, test_altair_fork_random
from eth2spec.test.bellatrix.fork import test_bellatrix_fork_basic, test_bellatrix_fork_random
from eth2spec.test.capella.fork import test_capella_fork_basic, test_capella_fork_random
from eth2spec.gen_helpers.gen_base import gen_runner, gen_typing
from eth2spec.gen_helpers.gen_from_tests.gen import generate_from_tests


def create_provider(tests_src, preset_name: PresetBaseName,
                    phase: SpecForkName, fork_name: SpecForkName) -> gen_typing.TestProvider:

    def prepare_fn() -> None:
        return

    def cases_fn() -> Iterable[gen_typing.TestCase]:
        return generate_from_tests(
            runner_name='fork',
            handler_name='fork',
            src=tests_src,
            fork_name=fork_name,
            preset_name=preset_name,
            phase=phase,
        )

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


def _get_fork_tests_providers():
    for preset in [MINIMAL, MAINNET]:
        yield create_provider(test_altair_fork_basic, preset, PHASE0, ALTAIR)
        yield create_provider(test_altair_fork_random, preset, PHASE0, ALTAIR)
        yield create_provider(test_bellatrix_fork_basic, preset, ALTAIR, BELLATRIX)
        yield create_provider(test_bellatrix_fork_random, preset, ALTAIR, BELLATRIX)
        yield create_provider(test_capella_fork_basic, preset, BELLATRIX, CAPELLA)
        yield create_provider(test_capella_fork_random, preset, BELLATRIX, CAPELLA)


if __name__ == "__main__":
    gen_runner.run_generator("forks", list(_get_fork_tests_providers()))