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# to you under the Apache License, Version 2.0 (the
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#
#   http://www.apache.org/licenses/LICENSE-2.0
#
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import logging
from typing import List, Optional

from sqlalchemy.exc import SQLAlchemyError

from superset.dao.base import BaseDAO
from superset.dashboards.filters import DashboardFilter
from superset.extensions import db
from superset.models.dashboard import Dashboard

logger = logging.getLogger(__name__)


class DashboardDAO(BaseDAO):
    model_cls = Dashboard
    base_filter = DashboardFilter

    @staticmethod
    def validate_slug_uniqueness(slug: str) -> bool:
        if not slug:
            return True
        dashboard_query = db.session.query(Dashboard).filter(Dashboard.slug == slug)
        return not db.session.query(dashboard_query.exists()).scalar()

    @staticmethod
    def validate_update_slug_uniqueness(dashboard_id: int, slug: Optional[str]) -> bool:
        if slug is not None:
            dashboard_query = db.session.query(Dashboard).filter(
                Dashboard.slug == slug, Dashboard.id != dashboard_id
            )
            return not db.session.query(dashboard_query.exists()).scalar()
        return True

    @staticmethod
    def update_charts_owners(model: Dashboard, commit: bool = True) -> Dashboard:
        owners = [owner for owner in model.owners]
        for slc in model.slices:
            slc.owners = list(set(owners) | set(slc.owners))
        if commit:
            db.session.commit()
        return model

    @staticmethod
    def bulk_delete(models: Optional[List[Dashboard]], commit: bool = True) -> None:
        item_ids = [model.id for model in models] if models else []
        # bulk delete, first delete related data
        if models:
            for model in models:
                model.slices = []
                model.owners = []
                db.session.merge(model)
        # bulk delete itself
        try:
            db.session.query(Dashboard).filter(Dashboard.id.in_(item_ids)).delete(
                synchronize_session="fetch"
            )
            if commit:
                db.session.commit()
        except SQLAlchemyError as ex:
            if commit:
                db.session.rollback()
            raise ex
