"""SQLModel ORM models for Supabase/PostgreSQL."""
from datetime import datetime
from typing import Optional

from sqlmodel import Field, SQLModel


class User(SQLModel, table=True):
    __tablename__ = "users"

    id: Optional[int] = Field(default=None, primary_key=True)
    email: str = Field(index=True, sa_column_kwargs={"unique": True})
    name: str
    password_hash: str
    is_active: bool = Field(default=True)
    created_at: datetime = Field(default_factory=datetime.utcnow, nullable=False)


class UserSession(SQLModel, table=True):
    __tablename__ = "user_sessions"

    id: Optional[int] = Field(default=None, primary_key=True)
    user_id: int = Field(foreign_key="users.id")
    login_at: datetime = Field(default_factory=datetime.utcnow, nullable=False)
    logout_at: Optional[datetime] = Field(default=None)
    last_activity: datetime = Field(default_factory=datetime.utcnow, nullable=False)
    ip_address: Optional[str] = None
    user_agent: Optional[str] = None
    is_active: bool = Field(default=True)


class Conversation(SQLModel, table=True):
    __tablename__ = "conversations"

    id: Optional[int] = Field(default=None, primary_key=True)
    user_id: int = Field(foreign_key="users.id", index=True)
    title: Optional[str] = None
    is_deleted: bool = Field(default=False, index=True)
    created_at: datetime = Field(default_factory=datetime.utcnow, nullable=False, index=True)
    last_message_at: datetime = Field(default_factory=datetime.utcnow, nullable=False, index=True)


class Message(SQLModel, table=True):
    __tablename__ = "messages"

    id: Optional[int] = Field(default=None, primary_key=True)
    conversation_id: int = Field(foreign_key="conversations.id")
    sender_id: int = Field(foreign_key="users.id")
    content: str
    created_at: datetime = Field(default_factory=datetime.utcnow, nullable=False)