from datetime import datetime

from sqlalchemy import JSON, DateTime, Integer, String, Text
from sqlalchemy.orm import Mapped, mapped_column

from app.core.constants import ActorValue
from app.core.database import Base
from app.core.utils.time import utc_now
from app.modules.ai_memory.constants import AIMemoryScope, AIMemorySource, AIMemoryStatus


class AIMemoryEntry(Base):
    __tablename__ = "ai_memory_entries"

    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
    code: Mapped[str] = mapped_column(String(64), unique=True, index=True)
    scope: Mapped[str] = mapped_column(String(64), default=AIMemoryScope.GLOBAL, index=True)
    subject: Mapped[str] = mapped_column(String(128), index=True)
    content: Mapped[str] = mapped_column(Text)
    summary: Mapped[str | None] = mapped_column(Text, nullable=True)
    tags: Mapped[list | None] = mapped_column(JSON, nullable=True)
    source: Mapped[str] = mapped_column(String(64), default=AIMemorySource.AUTO, index=True)
    importance: Mapped[int] = mapped_column(Integer, default=1, index=True)
    status: Mapped[str] = mapped_column(String(32), default=AIMemoryStatus.ACTIVE, index=True)
    actor: Mapped[str] = mapped_column(String(128), default=ActorValue.SYSTEM, index=True)
    last_used_at: Mapped[datetime | None] = mapped_column(DateTime, nullable=True, index=True)
    expires_at: Mapped[datetime | None] = mapped_column(DateTime, nullable=True, index=True)
    created_at: Mapped[datetime] = mapped_column(DateTime, default=utc_now, index=True)
    updated_at: Mapped[datetime] = mapped_column(
        DateTime,
        default=utc_now,
        onupdate=utc_now,
    )