from __future__ import annotations

from datetime import UTC, datetime
from decimal import Decimal
from typing import Any

from sqlalchemy import DateTime, ForeignKey, Index, Numeric, String, Text
from sqlalchemy.orm import Mapped, mapped_column, relationship

from app.models.base import BaseModel, ID_TYPE, TimestampMixin


class GiftRecord(BaseModel, TimestampMixin):
    __tablename__ = "gift_records"
    __table_args__ = (
        Index("idx_gift_records_household_id", "household_id"),
        Index("idx_gift_records_record_time", "record_time"),
        Index("idx_gift_records_household_record_time", "household_id", "record_time"),
        Index("idx_gift_records_record_type", "record_type"),
        Index("idx_gift_records_deleted_at", "deleted_at"),
    )

    id: Mapped[int] = mapped_column(ID_TYPE, primary_key=True)
    household_id: Mapped[int] = mapped_column(
        ID_TYPE,
        ForeignKey("households.id", ondelete="RESTRICT"),
        nullable=False,
    )
    record_type: Mapped[str] = mapped_column(
        String(32),
        nullable=False,
        default="cash_gift",
    )
    amount: Mapped[Decimal | None] = mapped_column(Numeric(12, 2), nullable=True)
    gift_name: Mapped[str | None] = mapped_column(String(128), nullable=True)
    estimated_value: Mapped[Decimal | None] = mapped_column(Numeric(12, 2), nullable=True)
    method_option_id: Mapped[int | None] = mapped_column(
        ID_TYPE,
        ForeignKey("option_items.id", ondelete="RESTRICT"),
        nullable=True,
    )
    scene_option_id: Mapped[int | None] = mapped_column(
        ID_TYPE,
        ForeignKey("option_items.id", ondelete="RESTRICT"),
        nullable=True,
    )
    record_time: Mapped[datetime] = mapped_column(
        DateTime,
        nullable=False,
        default=lambda: datetime.now(UTC).replace(tzinfo=None),
    )
    created_by: Mapped[int | None] = mapped_column(
        ID_TYPE,
        ForeignKey("accounts.id", ondelete="SET NULL"),
        nullable=True,
    )
    updated_by: Mapped[int | None] = mapped_column(
        ID_TYPE,
        ForeignKey("accounts.id", ondelete="SET NULL"),
        nullable=True,
    )
    deleted_at: Mapped[datetime | None] = mapped_column(DateTime, nullable=True)
    note: Mapped[str | None] = mapped_column(Text, nullable=True)

    household: Mapped[Any] = relationship("Household", back_populates="gift_records")
    method_option: Mapped[Any] = relationship(
        "OptionItem",
        foreign_keys=[method_option_id],
        back_populates="gift_records_as_method",
    )
    scene_option: Mapped[Any] = relationship(
        "OptionItem",
        foreign_keys=[scene_option_id],
        back_populates="gift_records_as_scene",
    )
    created_by_account: Mapped[Any] = relationship(
        "Account",
        foreign_keys=[created_by],
        back_populates="created_gift_records",
    )
    updated_by_account: Mapped[Any] = relationship(
        "Account",
        foreign_keys=[updated_by],
        back_populates="updated_gift_records",
    )