import uuid
from dataclasses import dataclass
from typing import Optional
from typing_extensions import Self

from sqlalchemy.engine import Engine
from sqlmodel import SQLModel, Field, Session, select
from typing_extensions import override

from app.repos.sql import dbRetry
from core.domain.worker.Worker import Worker
from core.domain.worker.WorkerStatus import WorkerStatus
from core.repos.WorkerStatusRepo import WorkerStatusRepo
from core.types.Id import Id


@dataclass
class WorkerStatusSqlRepo(WorkerStatusRepo):
	db: Engine

	class Table(SQLModel, table=True):
		__tablename__ = "worker_status"

		id: str = Field(primary_key=True)
		worker_id: str = Field(foreign_key="worker.id")
		ram_available: float
		cpu_utilization: float
		created_at: int

		def toDomain(self) -> WorkerStatus:
			return WorkerStatus(
				ownerId=Id(value=uuid.UUID(self.worker_id)),
				ramAvailable=self.ram_available,
				cpuUtilization=self.cpu_utilization,
				createdAt=self.created_at,
				id=Id(value=uuid.UUID(self.id))
			)

		@classmethod
		def toRow(cls, obj: WorkerStatus) -> Self:
			return cls(
				worker_id=obj.ownerId.value,
				ram_available=obj.ramAvailable,
				cpu_utilization=obj.cpuUtilization,
				created_at=obj.createdAt,
				id=obj.id.value
			)

	@override
	def getAll(self) -> list[WorkerStatus]:
		with Session(self.db) as conn:
			query = select(self.Table)
		return [row.toDomain() for row in conn.exec(query).all()]

	@override
	def get(self, id: Id[WorkerStatus]) -> Optional[WorkerStatus]:
		with Session(self.db) as conn:
			query = select(self.Table).filter_by(id=id.value)
		row = conn.exec(query).one_or_none()
		return row.toDomain() if row is not None else None

	@dbRetry
	@override
	def post(self, workerId: Id[Worker], ramAvailable: float, cpuUtilization: float) -> WorkerStatus:
		workerStatus = WorkerStatus(ownerId=workerId, ramAvailable=ramAvailable, cpuUtilization=cpuUtilization)
		with Session(self.db) as conn:
			conn.add(self.Table.toRow(workerStatus))
			conn.commit()
		return workerStatus