from __future__ import annotations

import uuid
from datetime import datetime
from typing import Any

from sqlalchemy import Boolean, DateTime, ForeignKey, String, Text, func
from sqlalchemy.orm import Mapped, mapped_column, relationship
from sqlalchemy.types import JSON

from app.db.base_class import Base


class HermesTaskConfig(Base):
    __tablename__ = "hermes_task_configs"

    id: Mapped[str] = mapped_column(String(36), primary_key=True, default=lambda: str(uuid.uuid4()))
    task_type: Mapped[str] = mapped_column(String(50), index=True)
    cron_expression: Mapped[str] = mapped_column(String(100))
    is_enabled: Mapped[bool] = mapped_column(Boolean, default=True)
    payload_template: Mapped[dict[str, Any]] = mapped_column(JSON, default=dict)
    
    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now())
    updated_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), server_default=func.now(), onupdate=func.now()
    )

    execution_logs = relationship(
        "HermesTaskExecutionLog",
        back_populates="config",
        cascade="all, delete-orphan",
        order_by="desc(HermesTaskExecutionLog.started_at)",
    )


class HermesTaskExecutionLog(Base):
    __tablename__ = "hermes_task_execution_logs"

    id: Mapped[str] = mapped_column(String(36), primary_key=True, default=lambda: str(uuid.uuid4()))
    config_id: Mapped[str] = mapped_column(String(36), ForeignKey("hermes_task_configs.id"), index=True)
    status: Mapped[str] = mapped_column(String(30), index=True)
    result_summary: Mapped[str | None] = mapped_column(String(255), nullable=True)
    error_trace: Mapped[str | None] = mapped_column(Text(), nullable=True)
    
    started_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now())
    completed_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)

    config = relationship("HermesTaskConfig", back_populates="execution_logs")