"""
app/models/user.py — users / login_records / user_preferences
Alembic 001：从 banana 搬，删除 credits 字段（架构方案规定）。
"""

from datetime import datetime

from sqlalchemy import (
    BigInteger, Boolean, DateTime, ForeignKey,
    Integer, String, Text, func,
)
from sqlalchemy.orm import Mapped, mapped_column, relationship

from app.core.database import Base


class User(Base):
    __tablename__ = "users"

    id: Mapped[int] = mapped_column(BigInteger, primary_key=True, autoincrement=True)
    username: Mapped[str] = mapped_column(String(64), unique=True, nullable=False)
    email: Mapped[str] = mapped_column(String(255), unique=True, nullable=False)
    hashed_password: Mapped[str] = mapped_column(String(255), nullable=False)
    is_active: Mapped[bool] = mapped_column(Boolean, default=True, nullable=False)
    created_at: Mapped[datetime] = mapped_column(
        DateTime, server_default=func.now(), nullable=False
    )
    updated_at: Mapped[datetime] = mapped_column(
        DateTime, server_default=func.now(), onupdate=func.now(), nullable=False
    )
    # 注：删除 banana 的 credits 字段（架构方案规定）

    login_records: Mapped[list["LoginRecord"]] = relationship(
        back_populates="user", lazy="noload"
    )


class LoginRecord(Base):
    __tablename__ = "login_records"

    id: Mapped[int] = mapped_column(BigInteger, primary_key=True, autoincrement=True)
    user_id: Mapped[int] = mapped_column(
        BigInteger, ForeignKey("users.id", ondelete="CASCADE"), nullable=False
    )
    ip_address: Mapped[str | None] = mapped_column(String(64))
    user_agent: Mapped[str | None] = mapped_column(String(512))
    created_at: Mapped[datetime] = mapped_column(
        DateTime, server_default=func.now(), nullable=False
    )

    user: Mapped["User"] = relationship(back_populates="login_records")


class UserPreference(Base):
    """UI 设置偏好（主题/语言等），不含 API Key。"""
    __tablename__ = "user_preferences"

    id: Mapped[int] = mapped_column(BigInteger, primary_key=True, autoincrement=True)
    user_id: Mapped[int] = mapped_column(
        BigInteger, ForeignKey("users.id", ondelete="CASCADE"),
        unique=True, nullable=False,
    )
    preferences_json: Mapped[str | None] = mapped_column(Text)  # JSON字符串
    updated_at: Mapped[datetime] = mapped_column(
        DateTime, server_default=func.now(), onupdate=func.now(), nullable=False
    )

    user: Mapped["User"] = relationship()