import uuid
from datetime import date, datetime
from decimal import Decimal

from sqlalchemy import Date, DateTime, ForeignKey, LargeBinary, Numeric, String
from sqlalchemy.dialects.postgresql import UUID
from sqlalchemy.orm import Mapped, mapped_column, relationship

from app.db.base import Base


class InvestmentTransaction(Base):
    __tablename__ = "investment_transactions"

    id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
    user_id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), ForeignKey("users.id", ondelete="CASCADE"), nullable=False, index=True)
    holding_id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), ForeignKey("investment_holdings.id"), nullable=False, index=True)
    transaction_id: Mapped[uuid.UUID | None] = mapped_column(UUID(as_uuid=True), ForeignKey("transactions.id"), nullable=True)
    type: Mapped[str] = mapped_column(String(20), nullable=False)  # buy|sell|dividend|split|merger|transfer_in|transfer_out|fee
    quantity: Mapped[Decimal] = mapped_column(Numeric(30, 10), nullable=False)
    price: Mapped[Decimal] = mapped_column(Numeric(20, 8), nullable=False)
    fees: Mapped[Decimal] = mapped_column(Numeric(20, 8), default=0, nullable=False)
    total_amount: Mapped[Decimal] = mapped_column(Numeric(20, 8), nullable=False)
    currency: Mapped[str] = mapped_column(String(10), nullable=False)
    date: Mapped[date] = mapped_column(Date, nullable=False, index=True)
    notes_enc: Mapped[bytes | None] = mapped_column("notes", LargeBinary, nullable=True)
    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), nullable=False)

    holding: Mapped["InvestmentHolding"] = relationship(back_populates="investment_transactions", lazy="noload")  # type: ignore[name-defined]