"""Gestion des comptes par la coordination (créer un référent, un bénévole
connecté…)."""

import uuid

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

from app.api._common import owned_or_404
from app.api.deps import get_edition
from app.api.schemas import AccountCreate, AccountRead, AccountUpdate
from app.auth.deps import require_coordinator
from app.auth.passwords import MIN_LENGTH, hash_password
from app.db import get_session
from app.models import Account, Edition, Role, Volunteer

router = APIRouter(
    prefix="/editions/{edition_id}/accounts", tags=["accounts"]
)


@router.post("", response_model=AccountRead, status_code=status.HTTP_201_CREATED)
def create_account(
    payload: AccountCreate,
    edition: Edition = Depends(get_edition),
    _guard: Account = Depends(require_coordinator),
    session: Session = Depends(get_session),
) -> Account:
    if payload.volunteer_id is not None:
        volunteer = session.get(Volunteer, payload.volunteer_id)
        if volunteer is None or volunteer.edition_id != edition.id:
            raise HTTPException(
                status_code=422, detail={"code": "account.volunteer_wrong_edition"}
            )

    # Deux systèmes de connexion : mot de passe pour la COORDINATION,
    # lien magique pour les autres.
    if payload.role is Role.COORDINATOR:
        if not payload.password or len(payload.password) < MIN_LENGTH:
            raise HTTPException(
                status_code=422,
                detail={"code": "account.password_required", "min": MIN_LENGTH},
            )
        password_hash = hash_password(payload.password)
    else:
        if payload.password is not None:
            raise HTTPException(
                status_code=422,
                detail={"code": "account.password_not_allowed"},
            )
        password_hash = None

    account = Account(
        edition_id=edition.id,
        email=payload.email.strip(),
        role=payload.role,
        volunteer_id=payload.volunteer_id,
        password_hash=password_hash,
    )
    session.add(account)
    try:
        session.commit()
    except IntegrityError as exc:
        session.rollback()
        raise HTTPException(
            status_code=409, detail={"code": "account.duplicate"}
        ) from exc
    session.refresh(account)
    return account


@router.get("", response_model=list[AccountRead])
def list_accounts(
    edition: Edition = Depends(get_edition),
    _guard: Account = Depends(require_coordinator),
    session: Session = Depends(get_session),
) -> list[Account]:
    return list(
        session.exec(
            select(Account)
            .where(Account.edition_id == edition.id)
            .order_by(Account.email)
        )
    )


@router.patch("/{account_id}", response_model=AccountRead)
def update_account(
    account_id: uuid.UUID,
    payload: AccountUpdate,
    edition: Edition = Depends(get_edition),
    _guard: Account = Depends(require_coordinator),
    session: Session = Depends(get_session),
) -> Account:
    """Seul le rôle change de main ici, et seulement entre LEAD et VOLUNTEER
    (lien magique dans les deux cas) : devenir référent d'un poste (voir
    `positions.py`) met à niveau le compte bénévole existant, sans toucher au
    mot de passe d'un compte COORDINATION."""
    account = owned_or_404(session.get(Account, account_id), edition.id)
    if payload.role is not None and payload.role != account.role:
        if Role.COORDINATOR in (account.role, payload.role):
            raise HTTPException(
                status_code=422, detail={"code": "account.role_change_not_allowed"}
            )
        account.role = payload.role
    session.commit()
    session.refresh(account)
    return account


@router.delete("/{account_id}", status_code=status.HTTP_204_NO_CONTENT)
def delete_account(
    account_id: uuid.UUID,
    edition: Edition = Depends(get_edition),
    _guard: Account = Depends(require_coordinator),
    session: Session = Depends(get_session),
) -> Response:
    account = owned_or_404(session.get(Account, account_id), edition.id)
    session.delete(account)
    session.commit()
    return Response(status_code=status.HTTP_204_NO_CONTENT)