# Copyright 2021 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

import numpy as np
import pytest

from transformers import (
    MODEL_FOR_CTC_MAPPING,
    MODEL_FOR_SPEECH_SEQ_2_SEQ_MAPPING,
    AutoFeatureExtractor,
    AutoTokenizer,
    Speech2TextForConditionalGeneration,
    Wav2Vec2ForCTC,
)
from transformers.pipelines import AutomaticSpeechRecognitionPipeline, pipeline
from transformers.testing_utils import (
    is_pipeline_test,
    require_datasets,
    require_tf,
    require_torch,
    require_torchaudio,
    slow,
)

from .test_pipelines_common import ANY, PipelineTestCaseMeta


# We can't use this mixin because it assumes TF support.
# from .test_pipelines_common import CustomInputPipelineCommonMixin


@is_pipeline_test
class AutomaticSpeechRecognitionPipelineTests(unittest.TestCase, metaclass=PipelineTestCaseMeta):
    model_mapping = {
        k: v
        for k, v in (list(MODEL_FOR_SPEECH_SEQ_2_SEQ_MAPPING.items()) if MODEL_FOR_SPEECH_SEQ_2_SEQ_MAPPING else [])
        + (MODEL_FOR_CTC_MAPPING.items() if MODEL_FOR_CTC_MAPPING else [])
    }

    def get_test_pipeline(self, model, tokenizer, feature_extractor):
        if tokenizer is None:
            # Side effect of no Fast Tokenizer class for these model, so skipping
            # But the slow tokenizer test should still run as they're quite small
            self.skipTest("No tokenizer available")
            return
            # return None, None

        speech_recognizer = AutomaticSpeechRecognitionPipeline(
            model=model, tokenizer=tokenizer, feature_extractor=feature_extractor
        )

        # test with a raw waveform
        audio = np.zeros((34000,))
        audio2 = np.zeros((14000,))
        return speech_recognizer, [audio, audio2]

    def run_pipeline_test(self, speech_recognizer, examples):
        audio = np.zeros((34000,))
        outputs = speech_recognizer(audio)
        self.assertEqual(outputs, {"text": ANY(str)})

    @require_torch
    @slow
    def test_pt_defaults(self):
        pipeline("automatic-speech-recognition", framework="pt")

    @require_torch
    def test_small_model_pt(self):
        import numpy as np

        speech_recognizer = pipeline(
            task="automatic-speech-recognition",
            model="facebook/s2t-small-mustc-en-fr-st",
            tokenizer="facebook/s2t-small-mustc-en-fr-st",
            framework="pt",
        )
        waveform = np.tile(np.arange(1000, dtype=np.float32), 34)
        output = speech_recognizer(waveform)
        self.assertEqual(output, {"text": "(Applaudissements)"})

    @require_tf
    def test_small_model_tf(self):
        self.skipTest("Tensorflow not supported yet.")

    @require_torch
    def test_torch_small_no_tokenizer_files(self):
        # test that model without tokenizer file cannot be loaded
        with pytest.raises(OSError):
            pipeline(
                task="automatic-speech-recognition",
                model="patrickvonplaten/tiny-wav2vec2-no-tokenizer",
                framework="pt",
            )

    @require_datasets
    @require_torch
    @slow
    def test_torch_large(self):
        import numpy as np

        speech_recognizer = pipeline(
            task="automatic-speech-recognition",
            model="facebook/wav2vec2-base-960h",
            tokenizer="facebook/wav2vec2-base-960h",
            framework="pt",
        )
        waveform = np.tile(np.arange(1000, dtype=np.float32), 34)
        output = speech_recognizer(waveform)
        self.assertEqual(output, {"text": ""})

        from datasets import load_dataset

        ds = load_dataset("hf-internal-testing/librispeech_asr_dummy", "clean", split="validation").sort("id")
        filename = ds[40]["file"]
        output = speech_recognizer(filename)
        self.assertEqual(output, {"text": "A MAN SAID TO THE UNIVERSE SIR I EXIST"})

    @require_datasets
    @require_torch
    @slow
    def test_torch_speech_encoder_decoder(self):
        speech_recognizer = pipeline(
            task="automatic-speech-recognition",
            model="facebook/s2t-wav2vec2-large-en-de",
            feature_extractor="facebook/s2t-wav2vec2-large-en-de",
            framework="pt",
        )

        from datasets import load_dataset

        ds = load_dataset("hf-internal-testing/librispeech_asr_dummy", "clean", split="validation").sort("id")
        filename = ds[40]["file"]
        output = speech_recognizer(filename)
        self.assertEqual(output, {"text": 'Ein Mann sagte zum Universum : " Sir, ich existiert! "'})

    @slow
    @require_torch
    @require_datasets
    def test_simple_wav2vec2(self):
        import numpy as np
        from datasets import load_dataset

        model = Wav2Vec2ForCTC.from_pretrained("facebook/wav2vec2-base-960h")
        tokenizer = AutoTokenizer.from_pretrained("facebook/wav2vec2-base-960h")
        feature_extractor = AutoFeatureExtractor.from_pretrained("facebook/wav2vec2-base-960h")

        asr = AutomaticSpeechRecognitionPipeline(model=model, tokenizer=tokenizer, feature_extractor=feature_extractor)

        waveform = np.tile(np.arange(1000, dtype=np.float32), 34)
        output = asr(waveform)
        self.assertEqual(output, {"text": ""})

        ds = load_dataset("hf-internal-testing/librispeech_asr_dummy", "clean", split="validation").sort("id")
        filename = ds[40]["file"]
        output = asr(filename)
        self.assertEqual(output, {"text": "A MAN SAID TO THE UNIVERSE SIR I EXIST"})

        filename = ds[40]["file"]
        with open(filename, "rb") as f:
            data = f.read()
        output = asr(data)
        self.assertEqual(output, {"text": "A MAN SAID TO THE UNIVERSE SIR I EXIST"})

    @slow
    @require_torch
    @require_torchaudio
    @require_datasets
    def test_simple_s2t(self):
        import numpy as np
        from datasets import load_dataset

        model = Speech2TextForConditionalGeneration.from_pretrained("facebook/s2t-small-mustc-en-it-st")
        tokenizer = AutoTokenizer.from_pretrained("facebook/s2t-small-mustc-en-it-st")
        feature_extractor = AutoFeatureExtractor.from_pretrained("facebook/s2t-small-mustc-en-it-st")

        asr = AutomaticSpeechRecognitionPipeline(model=model, tokenizer=tokenizer, feature_extractor=feature_extractor)

        waveform = np.tile(np.arange(1000, dtype=np.float32), 34)

        output = asr(waveform)
        self.assertEqual(output, {"text": "(Applausi)"})

        ds = load_dataset("hf-internal-testing/librispeech_asr_dummy", "clean", split="validation").sort("id")
        filename = ds[40]["file"]
        output = asr(filename)
        self.assertEqual(output, {"text": "Un uomo disse all'universo: \"Signore, io esisto."})

        filename = ds[40]["file"]
        with open(filename, "rb") as f:
            data = f.read()
        output = asr(data)
        self.assertEqual(output, {"text": "Un uomo disse all'universo: \"Signore, io esisto."})
