import logging
import pickle
from dataclasses import asdict, dataclass, field
from pathlib import Path
from typing import Callable

import numpy as np
import pandas as pd

from common.constants import UNKNOWN
from components.embedding_extraction import EmbeddingExtractor

logger = logging.getLogger(__name__)


@dataclass
class DatasetRow:
    """
    Класс для хранения данных одной строки датасета.
    """

    Index: int
    Text: str
    DocName: str
    Title: str
    DocNumber: str
    LevelParagraph: str = field(default=UNKNOWN)
    Pargaraph: str = field(default=UNKNOWN)
    Duplicate: str = field(default=UNKNOWN)
    PartLevel1: str = field(default=UNKNOWN)
    PartLevel2: str = field(default=UNKNOWN)
    Appendix: str = field(default=UNKNOWN)
    LevelParagraphAppendix: str = field(default=UNKNOWN)
    PargaraphAppendix: str = field(default=UNKNOWN)
    DuplicateAppendix: str = field(default=UNKNOWN)
    PartLevel1Appendix: str = field(default=UNKNOWN)
    Table: str = field(default=UNKNOWN)


class DocumentsDataset:
    """
    Класс для хранения данных датасета.
    Содержит список строк и векторы текстов.

    Изначально не содержит векторов, чтобы запустить процесс векторизации,
    нужно вызвать метод vectorize_with.
    """

    def __init__(self, rows: list[DatasetRow]):
        self.rows = rows
        self.vectors: np.ndarray | None = None

    def vectorize_with(
        self,
        vectorizer: EmbeddingExtractor,
        progress_callback: Callable[[int, int], None] | None = None,
    ) -> None:
        """
        Векторизация текстов в датасете.
        """
        logger.info('Starting dataset vectorization')
        total = len(self.rows)
        rows = [row.Text for row in self.rows]
        vectors = vectorizer.vectorize(rows, progress_callback)

        self.vectors = vectors
        logger.info(f'Completed vectorization of {total} rows')

    def to_pandas(self) -> pd.DataFrame:
        """
        Преобразовать датасет в pandas DataFrame.

        Returns:
            pd.DataFrame: Датафрейм с данными.
        """
        df = pd.DataFrame([asdict(row) for row in self.rows])
        if self.vectors is not None:
            df['Embedding'] = self.vectors.tolist()
        else:
            df['Embedding'] = np.nan
        return df

    def to_pickle(self, path: Path) -> None:
        """
        Сохранение датасета в pickle файл.
        """
        logger.info(f'Saving dataset to {path}')
        with open(path, 'wb') as f:
            pickle.dump(self.to_pandas(), f)
        logger.info('Dataset saved successfully')

    @classmethod
    def from_pickle(cls, path: Path) -> 'DocumentsDataset':
        """
        Загрузка датасета из pickle файла.
        """
        logger.info(f'Loading dataset from {path}')
        try:
            with open(path, 'rb') as f:
                dataset = pickle.load(f)
            logger.info(f'Loaded dataset with {len(dataset.rows)} rows')
            return dataset
        except Exception as e:
            logger.error(f'Failed to load dataset: {e}')
            raise