from fastapi import APIRouter, Depends, HTTPException, status
from sqlalchemy.exc import IntegrityError
from sqlalchemy.ext.asyncio import AsyncSession

from app.database import get_postgres_session
from app.deps.org_manager import require_org_manager
from app.models import Account
from app.schemas import MailGroupCreate, MailGroupEmailCheck, MailGroupListResponse, MailGroupRead
from app.services.mail_groups import (
    check_group_email_available,
    create_mail_group,
    list_mail_groups,
)

router = APIRouter(prefix="/groups", tags=["groups"])


@router.get("", response_model=MailGroupListResponse)
async def get_groups(
    manager: Account = Depends(require_org_manager),
    session: AsyncSession = Depends(get_postgres_session),
) -> MailGroupListResponse:
    items, counts = await list_mail_groups(session, manager.company_domain)
    return MailGroupListResponse(items=items, counts=counts)


@router.get("/check-email", response_model=MailGroupEmailCheck)
async def check_email(
    email: str,
    manager: Account = Depends(require_org_manager),
    session: AsyncSession = Depends(get_postgres_session),
) -> MailGroupEmailCheck:
    if manager.company_domain is None:
        raise HTTPException(
            status_code=status.HTTP_422_UNPROCESSABLE_ENTITY,
            detail="Company domain is required.",
        )
    result = await check_group_email_available(
        session,
        manager.company_domain,
        email,
    )
    return result


@router.post("", response_model=MailGroupRead, status_code=status.HTTP_201_CREATED)
async def add_group(
    payload: MailGroupCreate,
    manager: Account = Depends(require_org_manager),
    session: AsyncSession = Depends(get_postgres_session),
) -> MailGroupRead:
    try:
        group = await create_mail_group(session, manager=manager, payload=payload)
        await session.commit()
        return group
    except ValueError as error:
        raise HTTPException(
            status_code=status.HTTP_422_UNPROCESSABLE_ENTITY,
            detail=str(error),
        ) from error
    except IntegrityError as error:
        await session.rollback()
        raise HTTPException(
            status_code=status.HTTP_409_CONFLICT,
            detail="That group could not be created.",
        ) from error