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.events.constants import EventSource, EventStatus


class DomainEvent(Base):
    __tablename__ = "domain_events"

    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
    event_id: Mapped[str] = mapped_column(String(64), unique=True, index=True)
    event_type: Mapped[str] = mapped_column(String(128), index=True)
    source: Mapped[str] = mapped_column(String(64), default=EventSource.API, index=True)
    aggregate_type: Mapped[str] = mapped_column(String(128), index=True)
    aggregate_id: Mapped[str | None] = mapped_column(String(128), nullable=True, index=True)
    actor: Mapped[str] = mapped_column(String(128), default=ActorValue.SYSTEM, index=True)
    payload: Mapped[dict | None] = mapped_column(JSON, nullable=True)
    status: Mapped[str] = mapped_column(String(32), default=EventStatus.PENDING, index=True)
    attempts: Mapped[int] = mapped_column(Integer, default=0)
    idempotency_key: Mapped[str | None] = mapped_column(
        String(255),
        nullable=True,
        unique=True,
        index=True,
    )
    last_error: Mapped[str | None] = mapped_column(Text, nullable=True)
    next_attempt_at: Mapped[datetime | None] = mapped_column(
        DateTime,
        nullable=True,
        index=True,
    )
    locked_until: Mapped[datetime | None] = mapped_column(DateTime, nullable=True, index=True)
    locked_by: Mapped[str | None] = mapped_column(String(128), nullable=True, index=True)
    max_attempts: Mapped[int] = mapped_column(Integer, default=3, server_default="3")
    created_at: Mapped[datetime] = mapped_column(DateTime, default=utc_now, index=True)
    processed_at: Mapped[datetime | None] = mapped_column(DateTime, nullable=True, index=True)