import uuid
from datetime import datetime
from decimal import Decimal

from sqlalchemy import Boolean, DateTime, Numeric, String, Text
from sqlalchemy.dialects.postgresql import UUID
from sqlalchemy.orm import Mapped, mapped_column, relationship

from app.db.base import Base


class Asset(Base):
    __tablename__ = "assets"

    id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
    symbol: Mapped[str] = mapped_column(Text, nullable=False, index=True)
    name: Mapped[str] = mapped_column(Text, nullable=False)
    type: Mapped[str] = mapped_column(String(30), nullable=False)  # stock|etf|mutual_fund|bond|crypto|commodity|other
    currency: Mapped[str] = mapped_column(String(10), nullable=False)
    exchange: Mapped[str | None] = mapped_column(Text, nullable=True)
    isin: Mapped[str | None] = mapped_column(String(12), nullable=True)
    data_source: Mapped[str] = mapped_column(String(30), default="yahoo_finance", nullable=False)
    data_source_id: Mapped[str | None] = mapped_column(Text, nullable=True)
    last_price: Mapped[Decimal | None] = mapped_column(Numeric(20, 8), nullable=True)
    last_price_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
    price_change_24h: Mapped[Decimal | None] = mapped_column(Numeric(10, 4), nullable=True)
    is_active: Mapped[bool] = mapped_column(Boolean, default=True, nullable=False)
    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), nullable=False)
    updated_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), nullable=False)

    prices: Mapped[list["AssetPrice"]] = relationship(back_populates="asset", lazy="noload")  # type: ignore[name-defined]
    holdings: Mapped[list["InvestmentHolding"]] = relationship(back_populates="asset", lazy="noload")  # type: ignore[name-defined]