import os
import lm_eval.base as base
import lm_eval.tasks as tasks
import lm_eval.models as models
import lm_eval.evaluator as evaluator
import random
import pytest


# TODO: more fine grained unit tests rather than this big honking integration
# test once we break evaluator into smaller, more manageable pieces


@pytest.mark.parametrize("taskname,task_class", tasks.TASK_REGISTRY.items())
def test_evaluator(taskname, task_class):
    task_dict = tasks.get_task_dict([taskname])

    os.system("rm test_cache.db")
    lm = base.CachingLM(models.get_model("dummy")(), "test_cache.db")

    def ll_fn(reqs):
        for ctx, cont in reqs:
            if len(ctx) == 0:
                continue
            # space convention
            assert ctx[-1] != " "
            assert cont[0] == " " or ctx[-1] == "\n"

        res = []

        random.seed(42)
        for _ in reqs:
            res.append((-random.random(), False))

        return res

    def ll_perp_fn(reqs):
        for (string,) in reqs:
            assert isinstance(string, str)

        res = []
        random.seed(42)
        for _ in reqs:
            res.append(-random.random())

        return res

    lm.loglikelihood = ll_fn
    lm.loglikelihood_rolling = ll_perp_fn

    limit = 10
    e1 = evaluator.evaluate(
        lm=lm,
        task_dict=task_dict,
        num_fewshot=0,
        limit=limit,
        bootstrap_iters=10,
    )
    e2 = evaluator.evaluate(
        lm=lm,
        task_dict=task_dict,
        num_fewshot=0,
        limit=limit,
        bootstrap_iters=10,
    )

    # check that caching is working
    assert e1 == e2
