from dataclasses import dataclass

from anydi import singleton
from fansifter_common.auth.account import Account
from fansifter_common.auth.types import Permission

from dmp.adapters.db import ReportingDB
from dmp.artists.cache import ArtistCache, cached_artist_data
from dmp.artists.dtos import ArtistFansCount
from dmp.artists.services import ArtistAccessService


@dataclass(kw_only=True)
class GetArtistFansCountRequest:
    identity_id: str
    global_participant_id: str
    vendor_id: int | None
    subaccount_id: int | None
    countries: list[str] | None = None

    @property
    def account(self) -> Account | None:
        if self.vendor_id is not None and self.subaccount_id is not None:
            return Account(vendor_id=self.vendor_id, subaccount_id=self.subaccount_id)
        return None


@singleton
class GetArtistFansCountHandler:
    permission = Permission("fan_data_list", "view")

    def __init__(
        self,
        db: ReportingDB,
        artist_access_service: ArtistAccessService,
        artist_cache: ArtistCache,
    ) -> None:
        self.db = db
        self.artist_access_service = artist_access_service
        self.artist_cache = artist_cache

    def handle(self, request: GetArtistFansCountRequest) -> ArtistFansCount:
        artist_access = self.artist_access_service.check_artist_access(
            request.identity_id,
            request.global_participant_id,
            request.account,
            permission=self.permission,
        )

        return self._get_fans_count(
            request.global_participant_id,
            vendor_id=request.vendor_id,
            subaccount_id=request.subaccount_id,
            countries=request.countries,
            is_global=artist_access.is_global,
        )

    @cached_artist_data("fans-count:v2")
    def _get_fans_count(
        self,
        global_participant_id: str,
        vendor_id: int | None,
        subaccount_id: int | None,
        countries: list[str] | None,
        is_global: bool,
    ) -> ArtistFansCount:
        if countries:
            template_name = "artist/get-artist-fans-count-by-country.sql"
        else:
            template_name = "artist/get-artist-fans-count.sql"

        query = self.db.query_from_template(
            template_name,
            context={
                "global_participant_id": global_participant_id,
                "vendor_id": vendor_id,
                "subaccount_id": subaccount_id,
                "countries": countries,
                "is_global": is_global,
            },
        )
        result = self.db.session.execute(query).one_or_none()
        if not result:
            return ArtistFansCount()
        return ArtistFansCount.model_validate(result)