"""Test deprecated functionality which will be removed in vX.Y.Z"""
import sys

import torch

from tests.base import EvalModelTemplate


def _soft_unimport_module(str_module):
    # once the module is imported  e.g with parsing with pytest it lives in memory
    if str_module in sys.modules:
        del sys.modules[str_module]


class ModelVer0_6(EvalModelTemplate):

    # todo: this shall not be needed while evaluate asks for dataloader explicitly
    def val_dataloader(self):
        return self.dataloader(train=False)

    def validation_step(self, batch, batch_idx, *args, **kwargs):
        return {'val_loss': torch.tensor(0.6)}

    def validation_end(self, outputs):
        return {'val_loss': torch.tensor(0.6)}

    def test_dataloader(self):
        return self.dataloader(train=False)

    def test_end(self, outputs):
        return {'test_loss': torch.tensor(0.6)}


class ModelVer0_7(EvalModelTemplate):

    # todo: this shall not be needed while evaluate asks for dataloader explicitly
    def val_dataloader(self):
        return self.dataloader(train=False)

    def validation_step(self, batch, batch_idx, *args, **kwargs):
        return {'val_loss': torch.tensor(0.7)}

    def validation_end(self, outputs):
        return {'val_loss': torch.tensor(0.7)}

    def test_dataloader(self):
        return self.dataloader(train=False)

    def test_end(self, outputs):
        return {'test_loss': torch.tensor(0.7)}