from sqlalchemy import select
from sqlalchemy.orm import Session, selectinload
from ..models import Campaign, CtaBanner, Destination, HeroSlide, MapImage, Product, ThemeCard
from ..serializers import destination_dict, model_dict


ROUTE_SECTION_LABELS = [
    ("routes", "经典人文打卡线路", 0, 8),
    ("routes-outdoor", "极限山野户外野咖线路", 8, 16),
    ("routes-mix", "人文+户外综合混搭线路", 16, 24),
]


def site_config(db: Session, active_only: bool, include_public_extras: bool = True) -> dict:
    hero_stmt = select(HeroSlide).order_by(HeroSlide.sortOrder.asc())
    destination_stmt = select(Destination).options(selectinload(Destination.aliases)).order_by(Destination.sortOrder.asc())
    map_stmt = select(MapImage).order_by(MapImage.createdAt.asc())
    theme_stmt = select(ThemeCard).order_by(ThemeCard.sortOrder.asc())
    cta_stmt = select(CtaBanner).order_by(CtaBanner.sortOrder.asc())
    if active_only:
        hero_stmt = hero_stmt.where(HeroSlide.isActive.is_(True))
        destination_stmt = destination_stmt.where(Destination.isActive.is_(True))
        map_stmt = map_stmt.where(MapImage.isActive.is_(True))
        theme_stmt = theme_stmt.where(ThemeCard.isActive.is_(True))
        cta_stmt = cta_stmt.where(CtaBanner.isActive.is_(True))

    hero_slides = db.scalars(hero_stmt).all()
    destinations = db.scalars(destination_stmt).all()
    map_images = db.scalars(map_stmt).all()
    themes = db.scalars(theme_stmt).all()
    cta_banners = db.scalars(cta_stmt).all()
    result = {
        "heroSlides": [model_dict(item) for item in hero_slides],
        "destinations": [destination_dict(item) for item in destinations],
        "map": [model_dict(item) for item in map_images],
        "themes": [model_dict(item) for item in themes],
        "ctaBanners": [model_dict(item) for item in cta_banners],
    }
    if include_public_extras:
        campaigns = db.scalars(select(Campaign).where(Campaign.status == "published").order_by(Campaign.updatedAt.desc())).all()
        products = db.scalars(
            select(Product).where(Product.status == "published").order_by(Product.sortWeight.asc(), Product.createdAt.asc()).limit(48)
        ).all()
        result["campaigns"] = [model_dict(item) for item in campaigns]
        result["routeSections"] = [
            {"id": section_id, "title": title, "productIds": [item.id for item in products[start:end]]}
            for section_id, title, start, end in ROUTE_SECTION_LABELS
        ]
    return result