from __future__ import annotations

import uuid
from datetime import datetime
from enum import Enum

from sqlalchemy import DateTime, String, Text
from sqlalchemy.dialects.postgresql import UUID
from sqlalchemy.orm import Mapped, mapped_column

from core.db.base import Base, SoftDeleteMixin, TimestampMixin


class AutomationJobStatus(str, Enum):
    ACTIVE = "active"
    DISABLED = "disabled"


class ScheduleType(str, Enum):
    DAILY = "daily"
    WEEKLY = "weekly"


class AutomationJob(TimestampMixin, SoftDeleteMixin, Base):
    __tablename__: str = "automation_jobs"
    __table_args__ = {"extend_existing": True}

    id: Mapped[uuid.UUID] = mapped_column(
        UUID(as_uuid=True), primary_key=True, default=uuid.uuid4
    )
    owner_id: Mapped[uuid.UUID] = mapped_column(
        UUID(as_uuid=True),
        nullable=False,
    )
    title: Mapped[str] = mapped_column(
        String(255),
        nullable=False,
    )
    prompt: Mapped[str] = mapped_column(
        Text,
        nullable=False,
    )
    schedule_type: Mapped[ScheduleType] = mapped_column(
        String(20),
        nullable=False,
    )
    run_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True),
        nullable=False,
    )
    next_run_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True),
        nullable=False,
    )
    timezone: Mapped[str] = mapped_column(
        String(50),
        nullable=False,
        default="UTC",
    )
    last_run_at: Mapped[datetime | None] = mapped_column(
        DateTime(timezone=True),
        nullable=True,
    )
    status: Mapped[AutomationJobStatus] = mapped_column(
        String(20),
        nullable=False,
        default=AutomationJobStatus.ACTIVE,
    )
    created_by: Mapped[uuid.UUID | None] = mapped_column(
        UUID(as_uuid=True),
        nullable=True,
    )