from datetime import datetime
from typing import Optional

from sqlalchemy import BigInteger, Boolean, DateTime, Index, String, func
from sqlalchemy.orm import Mapped, mapped_column

from app.database.session import Base


class Admin(Base):
    __tablename__ = "admin"
    __table_args__ = (
        Index("idx_admin_username", "username", unique=True),
        Index("idx_admin_is_active", "is_active"),
        {
            "mysql_engine": "InnoDB",
            "mysql_charset": "utf8mb4",
            "mysql_collate": "utf8mb4_unicode_ci",
        },
    )

    id: Mapped[int] = mapped_column(
        BigInteger,
        primary_key=True,
        nullable=False,
        autoincrement=True,
        comment="고유 식별자",
    )

    username: Mapped[str] = mapped_column(
        String(50),
        nullable=False,
        unique=True,
        comment="로그인 ID",
    )

    password: Mapped[str] = mapped_column(
        String(255),
        nullable=False,
        comment="비밀번호",
    )

    name: Mapped[Optional[str]] = mapped_column(
        String(50),
        nullable=True,
        comment="표시 이름",
    )

    is_active: Mapped[bool] = mapped_column(
        Boolean,
        nullable=False,
        default=True,
        comment="활성화 상태 (비활성화 시 로그인 차단)",
    )

    last_login_at: Mapped[Optional[datetime]] = mapped_column(
        DateTime,
        nullable=True,
        comment="마지막 로그인 일시",
    )

    created_at: Mapped[datetime] = mapped_column(
        DateTime,
        nullable=False,
        server_default=func.now(),
        comment="생성 일시",
    )

    updated_at: Mapped[datetime] = mapped_column(
        DateTime,
        nullable=False,
        server_default=func.now(),
        onupdate=func.now(),
        comment="수정 일시",
    )

    def __repr__(self) -> str:
        return f"<Admin(id={self.id}, username='{self.username}', is_active={self.is_active})>"