from celery.result import AsyncResult

from rest_framework import status
from rest_framework.response import Response
from rest_framework.views import APIView

from .celery_tasks import sample_task


class TaskTriggerView(APIView):
    """
    ثبت و اجرای تسک.
    POST با بدنه اختیاری: {"duration": 3} - مدت زمان تسک به ثانیه.
    """

    def post(self, request):
        duration = request.data.get("duration", 1)
        try:
            duration = int(duration)
            duration = max(1, min(duration, 60))
        except (TypeError, ValueError):
            duration = 1
        result = sample_task.delay(duration)
        return Response(
            {"code": 200, "msg": "success", "data": {"task_id": result.id}},
            status=status.HTTP_200_OK,
        )


class TaskStatusView(APIView):
    """
    وضعیت تسک بر اساس task_id.
    GET /api/tasks/<task_id>/status/
    """

    def get(self, request, task_id):
        result = AsyncResult(task_id)
        state = result.state
        data = {"task_id": task_id, "status": state}
        if state == "PENDING":
            data["message"] = "تسک در صف یا یافت نشد."
        elif state == "PROGRESS":
            data["progress"] = result.info
        elif state == "SUCCESS":
            data["result"] = result.result
        elif state == "FAILURE":
            data["error"] = str(result.result)
        return Response(
            {"code": 200, "msg": "success", "data": data},
            status=status.HTTP_200_OK,
        )