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from core.database import Base
from core.types.balance import Balance
from datetime import datetime as dt
from sqlalchemy import Integer, Column, DateTime, Numeric, String, ForeignKey, Text
from sqlalchemy.orm import relationship

class Product(Base):
    __tablename__ = 'products'

    id = Column(Integer, primary_key=True)
    title = Column(String(255), nullable=False)
    description = Column(Text)
    group_id = Column(Integer, ForeignKey('groups.id'), nullable=False)
    category_id = Column(Integer, ForeignKey('product_categories.id'), nullable=False)
    price = Column(Numeric(10, 2), nullable=False, default=0.0)

    created_at = Column(DateTime, nullable=False)
    updated_at = Column(DateTime, nullable=False)

    balance = relationship("Balance", backref="product", lazy=True, uselist=False)

    def __init__(self, title, description, group_id, category_id, price):
        self.title = title
        self.description = description
        self.group_id = group_id
        self.category_id = category_id
        self.price = price

    def price_on(self, cycle):
        margin = (cycle.price_margin * self.price) / 100
        return self.price + margin

    def to_json(self):
        return {
            "title": self.title,
            "description": self.description,
            "group_id": self.group_id,
            "category_id": self.category_id,
            "price": self.price,
            "created_at": self.created_at.__str__(),
            "updated_at": self.updated_at.__str__(),
            "balance": (self.balance.to_json() if self.balance else None)
        }