import csv
import datasets
from datasets import BuilderConfig, GeneratorBasedBuilder, DatasetInfo, SplitGenerator, Split

_PROSODIC_PROMPTS_URLS = {
    "validation": "prosodic/validation.csv",
    "train": "prosodic/train.csv",
}

_AUTOMATIC_PROMPTS_URLS = {
    "validation": "automatic/validation.csv",
    "train": "automatic/train.csv",
}

_ARCHIVES = {
    "prosodic": "prosodic/audios.tar.gz",
    "automatic": "automatic/audios.tar.gz",
}

_PATH_TO_CLIPS = {
    "validation_prosodic": "prosodic/audios/validation",
    "train_prosodic": "prosodic/audios/train",
    "validation_automatic": "automatic/audios/validation",
    "train_automatic": "automatic/audios/train",
}

class EntoaConfig(BuilderConfig):
    def __init__(self, prompts_type="prosodic", **kwargs):
        super().__init__(**kwargs)
        self.prompts_type = prompts_type

class EntoaDataset(GeneratorBasedBuilder):
    BUILDER_CONFIGS = [
        EntoaConfig(name="prosodic", description="Prosodic audio prompts", prompts_type="prosodic"),
        EntoaConfig(name="automatic", description="Automatic audio prompts", prompts_type="automatic"),
    ]

    def _info(self):
        if self.config.name == "prosodic":
            features = datasets.Features(
                {
                    "path": datasets.Value("string"),
                    "name": datasets.Value("string"),
                    "speaker": datasets.Value("string"),
                    "start_time": datasets.Value("string"),
                    "end_time": datasets.Value("string"),
                    "normalized_text": datasets.Value("string"),
                    "text": datasets.Value("string"),
                    "duration": datasets.Value("string"),
                    "type": datasets.Value("string"),
                    "year": datasets.Value("string"),
                    "gender": datasets.Value("string"),
                    "age_range": datasets.Value("string"),
                    "total_duration": datasets.Value("string"),
                    "quality": datasets.Value("string"),
                    "theme": datasets.Value("string"),
                    "audio": datasets.Audio(sampling_rate=16_000),
                }
            )
        else:  # automatic
            features = datasets.Features(
                {
                    "audio_name": datasets.Value("string"),
                    "file_path": datasets.Value("string"),
                    "text": datasets.Value("string"),
                    "start_time": datasets.Value("string"),
                    "end_time": datasets.Value("string"),
                    "duration": datasets.Value("string"),
                    "quality": datasets.Value("string"),
                    "speech_genre": datasets.Value("string"),
                    "speech_style": datasets.Value("string"),
                    "variety": datasets.Value("string"),
                    "accent": datasets.Value("string"),
                    "sex": datasets.Value("string"),
                    "age_range": datasets.Value("string"),
                    "num_speakers": datasets.Value("string"),
                    "speaker_id": datasets.Value("string"),
                    "audio": datasets.Audio(sampling_rate=16_000),
                }
            )
        return DatasetInfo(features=features)

    def _split_generators(self, dl_manager):
        prompts_urls = _PROSODIC_PROMPTS_URLS if self.config.name == "prosodic" else _AUTOMATIC_PROMPTS_URLS
        archive = dl_manager.download(_ARCHIVES[self.config.name])
        prompts_path = dl_manager.download(prompts_urls)

        return [
            SplitGenerator(
                name=Split.VALIDATION,
                gen_kwargs={
                    "prompts_path": prompts_path["validation"],
                    "path_to_clips": _PATH_TO_CLIPS[f"validation_{self.config.name}"],
                    "audio_files": dl_manager.iter_archive(archive),
                },
            ),
            SplitGenerator(
                name=Split.TRAIN,
                gen_kwargs={
                    "prompts_path": prompts_path["train"],
                    "path_to_clips": _PATH_TO_CLIPS[f"train_{self.config.name}"],
                    "audio_files": dl_manager.iter_archive(archive),
                },
            ),
        ]

    def _generate_examples(self, prompts_path, path_to_clips, audio_files):
        examples = {}
        with open(prompts_path, "r") as f:
            csv_reader = csv.DictReader(f)
            for row in csv_reader:
                if self.config.name == "prosodic":
                    examples[row['path']] = {
                        "path": row['path'],
                        "name": row['name'],
                        "speaker": row['speaker'],
                        "start_time": row['start_time'],
                        "end_time": row['end_time'],
                        "normalized_text": row['normalized_text'],
                        "text": row['text'],
                        "duration": row['duration'],
                        "type": row['type'],
                        "year": row['year'],
                        "gender": row['gender'],
                        "age_range": row['age_range'],
                        "total_duration": row['total_duration'],
                        "quality": row['quality'],
                        "theme": row['theme'],
                    }
                else:  # automatic
                    examples[row['file_path']] = {
                        "audio_name": row['audio_name'],
                        "file_path": row['file_path'],
                        "text": row['text'],
                        "start_time": row['start_time'],
                        "end_time": row['end_time'],
                        "duration": row['duration'],
                        "quality": row['quality'],
                        "speech_genre": row['speech_genre'],
                        "speech_style": row['speech_style'],
                        "variety": row['variety'],
                        "accent": row['accent'],
                        "sex": row['sex'],
                        "age_range": row['age_range'],
                        "num_speakers": row['num_speakers'],
                        "speaker_id": row['speaker_id'],
                    }

        id_ = 0
        inside_clips_dir = False
        for path, f in audio_files:
            if path.startswith(path_to_clips):
                inside_clips_dir = True
                if path in examples:
                    audio = {"path": path, "bytes": f.read()}
                    yield id_, {**examples[path], "audio": audio}
                    id_ += 1
            elif inside_clips_dir:
                break