from http import HTTPStatus

from django.http import HttpRequest
from ninja import Router

from api.v1.decision.schemas import DecisionIn, DecisionOut, SingleDecisionOut
from apps.decision.services import decide_for_flag

router = Router(tags=["decision"])


@router.post(
    "",
    response={HTTPStatus.OK: DecisionOut},
    summary="Get decisions for feature flags",
    description=(
        "Resolve feature flag values for a given subject. "
        "Returns default values when no active experiment applies, "
        "or experiment variant values when the subject is assigned."
    ),
)
def decide(
    request: HttpRequest,
    payload: DecisionIn,
) -> tuple[HTTPStatus, DecisionOut]:
    decisions = []
    for flag_key in payload.flags:
        result = decide_for_flag(
            flag_key=flag_key,
            subject_id=payload.subject_id,
            subject_attributes=payload.subject_attributes,
        )
        decisions.append(SingleDecisionOut(**result))
    return HTTPStatus.OK, DecisionOut(decisions=decisions)