"""Bulk export endpoint."""

import os
import logging
from fastapi import APIRouter, HTTPException, Depends, BackgroundTasks
from fastapi.responses import FileResponse

from api.schemas import BulkExportRequest
from services.database import db_service
from services.export_service import export_service
from services.auth_dependency import get_current_user

router = APIRouter(tags=["export"])
api_logger = logging.getLogger("api")


@router.post("/api/export/bulk")
async def export_bulk_ads(
    request: BulkExportRequest,
    background_tasks: BackgroundTasks,
    username: str = Depends(get_current_user),
):
    """
    Export multiple ad creatives as a ZIP package.
    Creates /creatives/ folder and ad_copy_data.xlsx. Max 50 ads.
    """
    if len(request.ad_ids) > 50:
        raise HTTPException(status_code=400, detail="Maximum 50 ads can be exported at once")
    ads = []
    for ad_id in request.ad_ids:
        ad = await db_service.get_ad_creative(ad_id, username=username)
        if not ad:
            raise HTTPException(status_code=404, detail=f"Ad '{ad_id}' not found or access denied")
        ads.append(ad)
    try:
        api_logger.info("Creating export package for %d ads (user: %s)", len(ads), username)
        zip_path = await export_service.create_export_package(ads)
        background_tasks.add_task(export_service.cleanup_zip, zip_path)
        return FileResponse(
            zip_path,
            media_type="application/zip",
            filename=os.path.basename(zip_path),
        )
    except HTTPException:
        raise
    except Exception as e:
        api_logger.error("Bulk export failed: %s", e)
        raise HTTPException(status_code=500, detail=f"Export failed: {str(e)}")