# models.py
from sqlalchemy import create_engine, Column, Integer, String, Float, DateTime, ForeignKey, Text
from sqlalchemy.orm import declarative_base, relationship
from datetime import datetime

Base = declarative_base()

class Bundle(Base):
    __tablename__ = 'bundles'
    id = Column(Integer, primary_key=True)
    machine_name = Column(String, unique=True)
    human_name = Column(String)
    current_version_id = Column(Integer, ForeignKey('bundle_versions.id'))
    current_version = relationship("BundleVersion", uselist=False, foreign_keys=[current_version_id], post_update=True)
    versions = relationship("BundleVersion", back_populates="bundle", foreign_keys=lambda: [BundleVersion.bundle_id])
    sales_history = relationship("BundleSalesHistory", back_populates="bundle")
    items = relationship("BundleItem", back_populates="bundle")

class BundleVersion(Base):
    __tablename__ = 'bundle_versions'
    id = Column(Integer, primary_key=True)
    bundle_id = Column(Integer, ForeignKey('bundles.id'))
    version_hash = Column(String)
    version_data = Column(Text)
    timestamp = Column(DateTime, default=datetime.utcnow)
    bundle = relationship("Bundle", back_populates="versions", foreign_keys=[bundle_id])

class BundleSalesHistory(Base):
    __tablename__ = 'bundle_sales_history'
    id = Column(Integer, primary_key=True)
    bundle_id = Column(Integer, ForeignKey('bundles.id'))
    bundles_sold = Column(Float)
    timestamp = Column(DateTime, default=datetime.utcnow)
    bundle = relationship("Bundle", back_populates="sales_history")

class BundleItem(Base):
    __tablename__ = 'bundle_items'
    id = Column(Integer, primary_key=True)
    bundle_id = Column(Integer, ForeignKey('bundles.id'))
    title = Column(String)
    category = Column(String)
    details = Column(Text)
    bundle = relationship("Bundle", back_populates="items")