from datetime import date, timedelta
from typing import ClassVar

from pydantic.dataclasses import dataclass
from typing_extensions import Self

from .. import http
from ..utils import camel_to_snake_dict, format_end_date


@dataclass
class Stats:
    calendar_date: date

    _path: ClassVar[str]
    _page_size: ClassVar[int]

    @classmethod
    def list(
        cls,
        end: date | str | None = None,
        period: int = 1,
        *,
        client: http.Client | None = None,
    ) -> list[Self]:
        client = client or http.client
        end = format_end_date(end)
        period_type = "days" if "daily" in cls._path else "weeks"

        if period > cls._page_size:
            page = cls.list(end, cls._page_size, client=client)
            if not page:
                return []
            page = (
                cls.list(
                    end - timedelta(**{period_type: cls._page_size}),
                    period - cls._page_size,
                    client=client,
                )
                + page
            )
            return page

        start = end - timedelta(**{period_type: period - 1})
        path = cls._path.format(start=start, end=end, period=period)
        page_dirs = client.connectapi(path)
        if not isinstance(page_dirs, list) or not page_dirs:
            return []
        page_dirs = [d for d in page_dirs if isinstance(d, dict)]
        if page_dirs and "values" in page_dirs[0]:
            page_dirs = [{**stat, **stat.pop("values")} for stat in page_dirs]
        page_dirs = [camel_to_snake_dict(stat) for stat in page_dirs]
        return [cls(**stat) for stat in page_dirs]