from __future__ import annotations

from datetime import datetime
from decimal import Decimal
from typing import Any

from sqlalchemy import DateTime, ForeignKey, Index, Integer, Numeric, String, Text, UniqueConstraint, text
from sqlalchemy.types import JSON
from sqlalchemy.orm import Mapped, mapped_column, relationship

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


class Household(BaseModel, TimestampMixin):
    __tablename__ = "households"
    __table_args__ = (
        UniqueConstraint("household_code", name="uk_households_household_code"),
        Index(
            "uk_households_head_name_active",
            "head_name",
            unique=True,
            sqlite_where=text("deleted_at IS NULL"),
        ),
        Index("idx_households_head_name", "head_name"),
        Index("idx_households_phone", "phone"),
        Index(
            "idx_households_side_relation_category",
            "side",
            "relation_category_option_id",
        ),
        Index("idx_households_attendance_status", "attendance_status"),
        Index("idx_households_updated_at", "updated_at"),
        Index("idx_households_deleted_at", "deleted_at"),
    )

    id: Mapped[int] = mapped_column(ID_TYPE, primary_key=True)
    household_code: Mapped[str] = mapped_column(String(32), nullable=False)
    head_name: Mapped[str] = mapped_column(String(64), nullable=False)
    phone: Mapped[str | None] = mapped_column(String(32), nullable=True)
    side: Mapped[str] = mapped_column(String(32), nullable=False, default="groom_side")
    relation_category_option_id: Mapped[int | None] = mapped_column(
        ID_TYPE,
        ForeignKey("option_items.id", ondelete="RESTRICT"),
        nullable=True,
    )
    relation_detail_option_id: Mapped[int | None] = mapped_column(
        ID_TYPE,
        ForeignKey("option_items.id", ondelete="RESTRICT"),
        nullable=True,
    )
    tag_option_ids_json: Mapped[list[int] | None] = mapped_column(JSON, nullable=True)
    invite_status: Mapped[str] = mapped_column(
        String(32),
        nullable=False,
        default="not_invited",
    )
    attendance_status: Mapped[str] = mapped_column(
        String(32),
        nullable=False,
        default="pending",
    )
    expected_attendee_count: Mapped[int] = mapped_column(Integer, nullable=False, default=0)
    actual_attendee_count: Mapped[int] = mapped_column(Integer, nullable=False, default=0)
    child_count: Mapped[int] = mapped_column(Integer, nullable=False, default=0)
    red_packet_child_count: Mapped[int] = mapped_column(Integer, nullable=False, default=0)
    total_gift_amount: Mapped[Decimal] = mapped_column(
        Numeric(12, 2),
        nullable=False,
        default=Decimal("0.00"),
    )
    gift_method_option_id: Mapped[int | None] = mapped_column(
        ID_TYPE,
        ForeignKey("option_items.id", ondelete="RESTRICT"),
        nullable=True,
    )
    gift_scene_option_id: Mapped[int | None] = mapped_column(
        ID_TYPE,
        ForeignKey("option_items.id", ondelete="RESTRICT"),
        nullable=True,
    )
    favor_status: Mapped[str] = mapped_column(
        String(32),
        nullable=False,
        default="not_given",
    )
    candy_status: Mapped[str] = mapped_column(
        String(32),
        nullable=False,
        default="not_given",
    )
    child_red_packet_status: Mapped[str] = mapped_column(
        String(32),
        nullable=False,
        default="not_given",
    )
    note: Mapped[str | None] = mapped_column(Text, nullable=True)
    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)
    version: Mapped[int] = mapped_column(Integer, nullable=False, default=1)

    created_by_account: Mapped[Any] = relationship(
        "Account",
        foreign_keys=[created_by],
        back_populates="created_households",
    )
    updated_by_account: Mapped[Any] = relationship(
        "Account",
        foreign_keys=[updated_by],
        back_populates="updated_households",
    )
    relation_category_option: Mapped[Any] = relationship(
        "OptionItem",
        foreign_keys=[relation_category_option_id],
        back_populates="households_as_relation_category",
    )
    relation_detail_option: Mapped[Any] = relationship(
        "OptionItem",
        foreign_keys=[relation_detail_option_id],
        back_populates="households_as_relation_detail",
    )
    gift_method_option: Mapped[Any] = relationship(
        "OptionItem",
        foreign_keys=[gift_method_option_id],
        back_populates="households_as_gift_method",
    )
    gift_scene_option: Mapped[Any] = relationship(
        "OptionItem",
        foreign_keys=[gift_scene_option_id],
        back_populates="households_as_gift_scene",
    )
    members: Mapped[list[Any]] = relationship(
        "HouseholdMember",
        back_populates="household",
    )
    gift_records: Mapped[list[Any]] = relationship(
        "GiftRecord",
        back_populates="household",
    )