vinindkoeb/app/routers/purchase_rounds.py

from datetime import datetime, timezone
from typing import Annotated, Optional

from fastapi import APIRouter, Depends, HTTPException, Query, status
from sqlalchemy.exc import IntegrityError
from sqlmodel import Session, select

from app.db import SessionDep
from app.dependencies import (
    CurrentUser,
    get_round_in_organization,
    get_route_in_organization,
    oauth2_scheme,
    require_elevated_superuser,
)
from app.models.mail_log import MailLog, MailLogStatus
from app.models.mail_template import MailEventType, MailTemplate
from app.models.participant import Participant
from app.models.purchase_round import (
    PurchaseRound,
    PurchaseRoundCreate,
    PurchaseRoundPublic,
    PurchaseRoundStatus,
    PurchaseRoundUpdate,
)
from app.models.route import Route
from app.models.wine_offering import WineOffering
from app.services.mail_rendering import format_datetime_da, render_template
from app.services.postal import PostalSendError, send_mail

router = APIRouter(prefix="/purchase-rounds", tags=["purchase-rounds"])


def _commit_or_conflict(session: Session) -> None:
    try:
        session.commit()
    except IntegrityError as exc:
        session.rollback()
        if "ck_purchase_round_dates_required_unless_draft" in str(getattr(exc, "orig", exc)):
            raise HTTPException(
                status_code=status.HTTP_409_CONFLICT,
                detail="opens_at, order_deadline_at and pickup_at are required unless status is draft",
            ) from exc
        raise


@router.post("", response_model=PurchaseRoundPublic, status_code=status.HTTP_201_CREATED)
def create_purchase_round(
    payload: PurchaseRoundCreate, session: SessionDep, current_user: CurrentUser
) -> PurchaseRound:
    get_route_in_organization(session, payload.route_id, current_user.organization_id)
    purchase_round = PurchaseRound.model_validate(payload)
    purchase_round.status = PurchaseRoundStatus.DRAFT  # nye runder starter altid som kladde
    session.add(purchase_round)
    _commit_or_conflict(session)
    session.refresh(purchase_round)
    return purchase_round


@router.get("", response_model=list[PurchaseRoundPublic])
def list_purchase_rounds(
    session: SessionDep,
    current_user: CurrentUser,
    route_id: Optional[int] = None,
    status_: Optional[PurchaseRoundStatus] = Query(default=None, alias="status"),
    limit: int = Query(default=100, le=500, gt=0),
    offset: int = Query(default=0, ge=0),
) -> list[PurchaseRound]:
    statement = select(PurchaseRound).join(Route).where(Route.organization_id == current_user.organization_id)
    if route_id is not None:
        statement = statement.where(PurchaseRound.route_id == route_id)
    if status_ is not None:
        statement = statement.where(PurchaseRound.status == status_)
    statement = statement.order_by(PurchaseRound.id.desc()).offset(offset).limit(limit)
    return list(session.exec(statement).all())


@router.get("/{round_id}", response_model=PurchaseRoundPublic)
def get_purchase_round(round_id: int, session: SessionDep, current_user: CurrentUser) -> PurchaseRound:
    return get_round_in_organization(session, round_id, current_user.organization_id)


@router.patch("/{round_id}", response_model=PurchaseRoundPublic)
def update_purchase_round(
    round_id: int, payload: PurchaseRoundUpdate, session: SessionDep, current_user: CurrentUser
) -> PurchaseRound:
    purchase_round = get_round_in_organization(session, round_id, current_user.organization_id)
    for field, value in payload.model_dump(exclude_unset=True).items():
        setattr(purchase_round, field, value)
    session.add(purchase_round)
    _commit_or_conflict(session)
    session.refresh(purchase_round)
    return purchase_round


@router.delete("/{round_id}", status_code=status.HTTP_204_NO_CONTENT)
def delete_purchase_round(
    round_id: int,
    session: SessionDep,
    current_user: CurrentUser,
    token: Annotated[str, Depends(oauth2_scheme)],
) -> None:
    purchase_round = get_round_in_organization(session, round_id, current_user.organization_id)
    if purchase_round.status == PurchaseRoundStatus.OPEN:
        raise HTTPException(status_code=status.HTTP_403_FORBIDDEN, detail="An open purchase round cannot be deleted")
    if purchase_round.status == PurchaseRoundStatus.CLOSED:
        require_elevated_superuser(current_user, token)
    session.delete(purchase_round)
    session.commit()


@router.post("/{source_round_id}/copy", response_model=PurchaseRoundPublic, status_code=status.HTTP_201_CREATED)
def copy_purchase_round(source_round_id: int, session: SessionDep, current_user: CurrentUser) -> PurchaseRound:
    source = get_round_in_organization(session, source_round_id, current_user.organization_id)
    new_round = PurchaseRound(
        name=source.name,
        status=PurchaseRoundStatus.DRAFT,
        opens_at=source.opens_at,
        order_deadline_at=source.order_deadline_at,
        pickup_at=source.pickup_at,
        eur_dkk_rate=source.eur_dkk_rate,
        intro_text=source.intro_text,
        pickup_info_text=source.pickup_info_text,
        route_id=source.route_id,
    )
    session.add(new_round)
    session.flush()  # for at få new_round.id til vinudbuddene nedenfor
    for offering in source.wine_offerings:
        session.add(
            WineOffering(
                name=offering.name,
                price=offering.price,
                is_organic=offering.is_organic,
                category_id=offering.category_id,
                purchase_round_id=new_round.id,
            )
        )
    _commit_or_conflict(session)
    session.refresh(new_round)
    return new_round


@router.post("/{round_id}/announce")
def announce_purchase_round(round_id: int, session: SessionDep, current_user: CurrentUser) -> dict:
    purchase_round = get_round_in_organization(session, round_id, current_user.organization_id)
    if purchase_round.status != PurchaseRoundStatus.OPEN:
        raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail="Round must be open before announcing")

    route = purchase_round.route
    if not route.sender_name or not route.sender_email:
        raise HTTPException(
            status_code=status.HTTP_400_BAD_REQUEST,
            detail="Route has no sender_name/sender_email configured",
        )

    template = session.exec(
        select(MailTemplate).where(
            MailTemplate.route_id == route.id, MailTemplate.event_type == MailEventType.ROUND_ANNOUNCED
        )
    ).first()
    if template is None:
        raise HTTPException(
            status_code=status.HTTP_400_BAD_REQUEST,
            detail="No round_announced template configured for this route",
        )

    participants = session.exec(
        select(Participant).where(Participant.route_id == route.id, Participant.is_active == True)  # noqa: E712
    ).all()

    sent = failed = 0
    for participant in participants:
        variables = {
            "participant_name": participant.name,
            "route_name": route.name,
            "round_name": purchase_round.name,
            "opens_at": format_datetime_da(purchase_round.opens_at) if purchase_round.opens_at else "",
            "order_deadline_at": format_datetime_da(purchase_round.order_deadline_at)
            if purchase_round.order_deadline_at
            else "",
            "pickup_at": format_datetime_da(purchase_round.pickup_at) if purchase_round.pickup_at else "",
            "intro_text": purchase_round.intro_text or "",
            "pickup_info_text": purchase_round.pickup_info_text or "",
        }
        rendered_subject = render_template(template.subject, variables)
        rendered_body = render_template(template.body_html, variables)

        log = MailLog(
            participant_id=participant.id,
            purchase_round_id=purchase_round.id,
            mail_template_id=template.id,
            event_type=MailEventType.ROUND_ANNOUNCED,
            rendered_subject=rendered_subject,
            status=MailLogStatus.FAILED,
        )
        try:
            postal_id, postal_token = send_mail(
                to=participant.email,
                from_name=route.sender_name,
                from_email=route.sender_email,
                subject=rendered_subject,
                html_body=rendered_body,
                tag="round_announced",
            )
            log.status = MailLogStatus.SENT
            log.postal_message_id = postal_id
            log.postal_token = postal_token
            log.sent_at = datetime.now(timezone.utc)
            sent += 1
        except PostalSendError as exc:
            log.error_message = str(exc)
            failed += 1

        session.add(log)
        session.commit()

    return {"sent": sent, "failed": failed, "total_participants": len(participants)}