import asyncio
import logging
from fastapi import APIRouter, Depends, Query, BackgroundTasks
from typing import Optional

from auth.models import TokenPayload
from auth.dependencies import require_permission
from crm.models import CustomerCreate, CustomerUpdate, CustomerInDB, CustomerListResponse
from crm import service, nextcloud
from config import settings

router = APIRouter(prefix="/api/crm/customers", tags=["crm-customers"])
logger = logging.getLogger(__name__)


@router.get("", response_model=CustomerListResponse)
def list_customers(
    search: Optional[str] = Query(None),
    tag: Optional[str] = Query(None),
    _user: TokenPayload = Depends(require_permission("crm", "view")),
):
    customers = service.list_customers(search=search, tag=tag)
    return CustomerListResponse(customers=customers, total=len(customers))


@router.get("/{customer_id}", response_model=CustomerInDB)
def get_customer(
    customer_id: str,
    _user: TokenPayload = Depends(require_permission("crm", "view")),
):
    return service.get_customer(customer_id)


@router.post("", response_model=CustomerInDB, status_code=201)
async def create_customer(
    body: CustomerCreate,
    background_tasks: BackgroundTasks,
    _user: TokenPayload = Depends(require_permission("crm", "edit")),
):
    customer = service.create_customer(body)
    if settings.nextcloud_url:
        background_tasks.add_task(_init_nextcloud_folder, customer)
    return customer


async def _init_nextcloud_folder(customer) -> None:
    try:
        nc_path = service.get_customer_nc_path(customer)
        base = f"customers/{nc_path}"
        for sub in ("media", "documents", "sent", "received"):
            await nextcloud.ensure_folder(f"{base}/{sub}")
        await nextcloud.write_info_file(base, customer.name, customer.id)
    except Exception as e:
        logger.warning("Nextcloud folder init failed for customer %s: %s", customer.id, e)


@router.put("/{customer_id}", response_model=CustomerInDB)
def update_customer(
    customer_id: str,
    body: CustomerUpdate,
    _user: TokenPayload = Depends(require_permission("crm", "edit")),
):
    return service.update_customer(customer_id, body)


@router.delete("/{customer_id}", status_code=204)
def delete_customer(
    customer_id: str,
    _user: TokenPayload = Depends(require_permission("crm", "edit")),
):
    service.delete_customer(customer_id)