from sqlalchemy import Column, String, Float, Integer, DateTime, ForeignKey
from sqlalchemy.orm import relationship
from datetime import datetime

from app.core.database import Base


class Asset(Base):
    __tablename__ = "assets"

    id = Column(String, primary_key=True, index=True)  # Slug (e.g., "bitcoin")
    rank = Column(Integer)
    symbol = Column(String, index=True)
    name = Column(String, index=True)
    supply = Column(Float)
    max_supply = Column(Float, nullable=True)
    market_cap_usd = Column(Float)
    volume_usd_24hr = Column(Float)
    price_usd = Column(Float)
    change_percent_24hr = Column(Float, nullable=True)
    vwap_24hr = Column(Float, nullable=True)
    explorer = Column(String, nullable=True)
    
    # Last updated timestamp
    last_updated = Column(DateTime, default=datetime.utcnow)
    
    # Relationships
    price_history = relationship("AssetPriceHistory", back_populates="asset", cascade="all, delete-orphan")
    
    def __repr__(self):
        return f"<Asset {self.symbol}: {self.name}>"


class AssetPriceHistory(Base):
    __tablename__ = "asset_price_history"
    
    id = Column(Integer, primary_key=True, index=True)
    asset_id = Column(String, ForeignKey("assets.id", ondelete="CASCADE"), index=True)
    price_usd = Column(Float)
    timestamp = Column(DateTime, index=True)
    
    # Relationships
    asset = relationship("Asset", back_populates="price_history")
    
    def __repr__(self):
        return f"<AssetPriceHistory {self.asset_id}: {self.price_usd} at {self.timestamp}>"