# Copyright (c) 2023 PaddlePaddle Authors. All Rights Reserved.
# Copyright 2020 The HuggingFace Team. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

import unittest

from paddlenlp.transformers.mamba.tokenizer import MambaTokenizer
from paddlenlp.transformers.tokenizer_utils import PretrainedTokenizer

from ...transformers.test_tokenizer_common import TokenizerTesterMixin


class MambaTokenizationTest(TokenizerTesterMixin, unittest.TestCase):

    tokenizer_class = MambaTokenizer
    test_decode_token = True

    def get_tokenizer(self, **kwargs) -> PretrainedTokenizer:
        tokenizer = MambaTokenizer.from_pretrained("state-spaces/mamba-2.8b-hf", **kwargs)
        return tokenizer

    def get_input_output_texts(self, tokenizer):
        input_text = "lower newer"
        output_text = "lower newer"
        return input_text, output_text

    def test_full_tokenizer(self):
        tokenizer = self.get_tokenizer()
        text = "lower newer"
        bpe_tokens = ["Ġlower", "Ġnewer"]
        tokens = tokenizer.tokenize(text, add_prefix_space=True)
        self.assertListEqual(tokens, bpe_tokens)

        input_tokens = tokens + [tokenizer.unk_token]
        input_bpe_tokens = [2406, 21629, 0]
        self.assertListEqual(tokenizer.convert_tokens_to_ids(input_tokens), input_bpe_tokens)

    def test_pretokenized_inputs(self, *args, **kwargs):
        pass

    def test_tokenizers_common_ids_setters(self, *args, **kwargs):
        pass

    def test_mask_output(self):
        pass

    def test_offsets_mapping(self):
        pass

    def test_offsets_mapping_with_unk(self):
        pass

    def test_special_tokens_mask(self):
        pass

    def test_special_tokens_mask_input_pairs(self):
        pass

    def test_padding_side_in_kwargs(self):
        tokenizer = self.get_tokenizer(padding_side="left")
        self.assertEqual(tokenizer.padding_side, "left")

        tokenizer = self.get_tokenizer(padding_side="right")
        self.assertEqual(tokenizer.padding_side, "right")

    def test_truncation_side_in_kwargs(self):
        tokenizer = self.get_tokenizer(truncation_side="left")
        self.assertEqual(tokenizer.truncation_side, "left")

        tokenizer = self.get_tokenizer(truncation_side="right")
        self.assertEqual(tokenizer.truncation_side, "right")

    def test_add_tokens(self):
        tokenizer = self.get_tokenizer()

        vocab_size = len(tokenizer)
        self.assertEqual(tokenizer.add_tokens(""), 0)
        self.assertEqual(tokenizer.add_tokens("testoken"), 1)
        self.assertEqual(tokenizer.add_tokens(["testoken1", "testtoken2"]), 2)
        self.assertEqual(len(tokenizer), vocab_size + 3)

        self.assertEqual(tokenizer.add_special_tokens({}), 0)
        self.assertRaises(AssertionError, tokenizer.add_special_tokens, {"additional_special_tokens": "<testtoken1>"})
        self.assertEqual(tokenizer.add_special_tokens({"additional_special_tokens": ["<testtoken2>"]}), 1)
        self.assertEqual(
            tokenizer.add_special_tokens({"additional_special_tokens": ["<testtoken3>", "<testtoken4>"]}), 2
        )
        self.assertIn("<testtoken3>", tokenizer.special_tokens_map["additional_special_tokens"])
        self.assertIsInstance(tokenizer.special_tokens_map["additional_special_tokens"], list)
        self.assertGreaterEqual(len(tokenizer.special_tokens_map["additional_special_tokens"]), 2)

        self.assertEqual(len(tokenizer), vocab_size + 6)

    def test_add_tokens_tokenizer(self):
        tokenizer = self.get_tokenizer()

        vocab_size = tokenizer.vocab_size
        all_size = len(tokenizer)

        self.assertNotEqual(vocab_size, 0)

        new_toks = ["aaaaa bbbbbb", "cccccccccdddddddd"]
        added_toks = tokenizer.add_tokens(new_toks)
        vocab_size_2 = tokenizer.vocab_size
        all_size_2 = len(tokenizer)

        self.assertNotEqual(vocab_size_2, 0)
        self.assertEqual(vocab_size, vocab_size_2)
        self.assertEqual(added_toks, len(new_toks))
        self.assertEqual(all_size_2, all_size + len(new_toks))

        tokens = tokenizer.encode(
            "aaaaa bbbbbb low cccccccccdddddddd l", return_token_type_ids=None, add_special_tokens=False
        )["input_ids"]
        self.assertGreaterEqual(len(tokens), 4)
        self.assertGreater(tokens[0], tokenizer.vocab_size - 1)
        self.assertGreater(tokens[-2], tokenizer.vocab_size - 1)

    def test_consecutive_unk_string(self):
        tokenizer = self.get_tokenizer(add_bos_token=False)

        tokens = [tokenizer.unk_token for _ in range(2)]
        string = tokenizer.convert_tokens_to_string(tokens)
        encoding = tokenizer(
            text=string,
            runcation=True,
            return_offsets_mapping=True,
        )
        self.assertEqual(len(encoding["input_ids"]), 2)
        self.assertEqual(len(encoding["offset_mapping"]), 2)

    def test_padding_if_pad_token_set_slow(self):
        tokenizer = self.get_tokenizer()

        # Simple input
        s = "This is a simple input"
        s2 = ["This is a simple input looooooooong", "This is a simple input"]
        p = ("This is a simple input", "This is a pair")

        pad_token_id = tokenizer.pad_token_id

        out_s = tokenizer(s, padding="max_length", max_length=30, return_tensors="np", return_attention_mask=True)
        out_s2 = tokenizer(s2, padding=True, truncate=True, return_tensors="np", return_attention_mask=True)
        out_p = tokenizer(*p, padding="max_length", max_length=60, return_tensors="np", return_attention_mask=True)

        # s
        # test single string max_length padding
        self.assertEqual(out_s["input_ids"].shape[-1], 30)
        self.assertTrue(pad_token_id in out_s["input_ids"])
        self.assertTrue(0 in out_s["attention_mask"])

        # s2
        # test automatic padding
        self.assertEqual(out_s2["input_ids"].shape[-1], 9)
        # long slice doesn't have padding
        self.assertFalse(pad_token_id in out_s2["input_ids"][0])
        self.assertFalse(0 in out_s2["attention_mask"][0])
        # short slice does have padding
        self.assertTrue(pad_token_id in out_s2["input_ids"][1])
        self.assertTrue(0 in out_s2["attention_mask"][1])

        # p
        # test single pair max_length padding
        self.assertEqual(out_p["input_ids"].shape[-1], 60)
        self.assertTrue(pad_token_id in out_p["input_ids"])
        self.assertTrue(0 in out_p["attention_mask"])

    def test_pretrained_model_lists(self):
        pass
