from sqlalchemy import Column, Integer, String, ForeignKey, Double, asc, Table
from sqlalchemy.orm import relationship, mapped_column, Mapped

import enums.service
from models import BaseModel

services_kit_services = Table(
    'services_kit_services',
    BaseModel.metadata,
    Column('services_kit_id', ForeignKey('services_kits.id')),
    Column('service_id', ForeignKey('services.id')),

)


class Service(BaseModel):
    __tablename__ = 'services'
    id: Mapped[int] = mapped_column(Integer, autoincrement=True, primary_key=True, index=True)
    name = Column(String, nullable=False, comment='Название услуги')

    category_id = Column(Integer, ForeignKey('service_categories.id'), nullable=False, comment='ID категории услуги')
    category = relationship('ServiceCategory', lazy='joined')

    price = Column(
        Double,
        nullable=False,
        comment='Стоимость услуги'
    )
    cost = Column(
        Double,
        nullable=False,
        server_default='0',
        comment='Себестоимость услуги'
    )

    service_type = Column(Integer,
                          server_default=f'{enums.service.ServiceType.DEAL_SERVICE}',
                          nullable=False,
                          comment='Тип услуги')
    price_ranges = relationship('ServicePriceRange',
                                back_populates='service',
                                lazy='selectin',
                                order_by="asc(ServicePriceRange.from_quantity)",
                                cascade="all, delete-orphan")
    category_prices = relationship('ServiceCategoryPrice',
                                   back_populates='service',
                                   lazy='selectin',
                                   cascade="all, delete-orphan")
    rank: Mapped[str] = mapped_column(
        nullable=False,
        server_default='',
        comment='Ранг услуги'
    )


class ServicePriceRange(BaseModel):
    __tablename__ = 'service_price_ranges'
    id = Column(Integer, autoincrement=True, primary_key=True, index=True)
    service_id = Column(Integer, ForeignKey('services.id'), nullable=False, comment='ID услуги')
    service = relationship('Service', back_populates='price_ranges')
    from_quantity = Column(Integer, nullable=False, comment='От количества')
    to_quantity = Column(Integer, nullable=False, comment='До количества')
    price = Column(Double, nullable=False, comment='Цена')


class ServiceCategoryPrice(BaseModel):
    __tablename__ = 'service_category_prices'
    service_id: Mapped[int] = mapped_column(ForeignKey('services.id'), primary_key=True)
    category_id: Mapped[int] = mapped_column(ForeignKey('service_price_category.id'), primary_key=True)

    price: Mapped[float] = mapped_column(Double, nullable=False, comment='Цена')

    service: Mapped["Service"] = relationship('Service', lazy='joined', back_populates='category_prices')
    category: Mapped["ServicePriceCategory"] = relationship('ServicePriceCategory', lazy='joined')


class ServicePriceCategory(BaseModel):
    __tablename__ = 'service_price_category'
    id: Mapped[int] = mapped_column(primary_key=True)
    name: Mapped[str] = mapped_column(nullable=False)


class ServiceCategory(BaseModel):
    __tablename__ = 'service_categories'
    id = Column(Integer, autoincrement=True, primary_key=True, index=True)
    name = Column(String, nullable=False)

    deal_service_rank: Mapped[str] = mapped_column(
        nullable=False,
        server_default='',
        comment='Ранг услуги для сделки'
    )
    product_service_rank: Mapped[str] = mapped_column(
        nullable=False,
        server_default='',
        comment='Ранг услуги для товара'
    )


class ServicesKit(BaseModel):
    __tablename__ = 'services_kits'
    id: Mapped[int] = mapped_column(primary_key=True)
    name: Mapped[str] = mapped_column(nullable=False)
    service_type: Mapped[int] = mapped_column(
        server_default=f'{enums.service.ServiceType.DEAL_SERVICE}',
        nullable=False,
        comment='Тип услуги'
    )
    services: Mapped[list["Service"]] = relationship(
        secondary=services_kit_services,
        lazy='selectin'
    )