# Copyright (c) Alibaba, Inc. and its affiliates.
import os
import shutil
import tempfile
import unittest
import zipfile
from functools import partial

from modelscope.hub.snapshot_download import snapshot_download
from modelscope.metainfo import Trainers
from modelscope.msdatasets import MsDataset
from modelscope.trainers import build_trainer
from modelscope.utils.config import Config, ConfigDict
from modelscope.utils.constant import DownloadMode, ModelFile
from modelscope.utils.test_utils import test_level


class TestGeneralImageClassificationTestTrainer(unittest.TestCase):

    def setUp(self):
        print(('Testing %s.%s' % (type(self).__name__, self._testMethodName)))

        try:
            self.train_dataset = MsDataset.load(
                'cats_and_dogs',
                namespace='tany0699',
                subset_name='default',
                split='train')

            self.eval_dataset = MsDataset.load(
                'cats_and_dogs',
                namespace='tany0699',
                subset_name='default',
                split='validation')
        except Exception as e:
            print(f'Download dataset error: {e}')

        self.max_epochs = 1

        self.tmp_dir = tempfile.TemporaryDirectory().name
        if not os.path.exists(self.tmp_dir):
            os.makedirs(self.tmp_dir)

    def tearDown(self):
        shutil.rmtree(self.tmp_dir)
        super().tearDown()

    @unittest.skipUnless(test_level() >= 0, 'skip test in current test level')
    def test_nextvit_dailylife_train(self):
        model_id = 'damo/cv_nextvit-small_image-classification_Dailylife-labels'

        def cfg_modify_fn(cfg):
            cfg.train.dataloader.batch_size_per_gpu = 32
            cfg.train.dataloader.workers_per_gpu = 1
            cfg.train.max_epochs = self.max_epochs
            cfg.model.mm_model.head.num_classes = 2
            cfg.train.optimizer.lr = 1e-4
            cfg.train.lr_config.warmup_iters = 1
            cfg.train.evaluation.metric_options = {'topk': (1, )}
            cfg.evaluation.metric_options = {'topk': (1, )}
            return cfg

        kwargs = dict(
            model=model_id,
            work_dir=self.tmp_dir,
            train_dataset=self.train_dataset,
            eval_dataset=self.eval_dataset,
            cfg_modify_fn=cfg_modify_fn)

        trainer = build_trainer(
            name=Trainers.image_classification, default_args=kwargs)
        trainer.train()

        results_files = os.listdir(self.tmp_dir)
        self.assertIn(f'{trainer.timestamp}.log.json', results_files)
        for i in range(self.max_epochs):
            self.assertIn(f'epoch_{i+1}.pth', results_files)

    @unittest.skipUnless(test_level() >= 0, 'skip test in current test level')
    def test_nextvit_dailylife_eval(self):
        model_id = 'damo/cv_nextvit-small_image-classification_Dailylife-labels'

        kwargs = dict(
            model=model_id,
            work_dir=self.tmp_dir,
            train_dataset=None,
            eval_dataset=self.eval_dataset)

        trainer = build_trainer(
            name=Trainers.image_classification, default_args=kwargs)
        result = trainer.evaluate()
        print(result)


if __name__ == '__main__':
    unittest.main()