from fastapi import APIRouter, HTTPException
from fastapi.responses import FileResponse

from backend.app.schemas import FinanceSyncResponse, FinanceSyncResult
from backend.app.services.email_service import create_monthly_zip, sync_finance_emails


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


@router.post("/sync", response_model=FinanceSyncResponse)
async def sync_finance():
    try:
        items_raw = await sync_finance_emails()
    except RuntimeError as exc:
        raise HTTPException(status_code=500, detail=str(exc)) from exc

    items = [FinanceSyncResult(**item) for item in items_raw]
    return FinanceSyncResponse(items=items)


@router.get("/download/{month}")
async def download_finance_month(month: str):
    """
    Download a zipped archive for a given month (YYYY-MM).
    """
    try:
        zip_path = await create_monthly_zip(month)
    except FileNotFoundError as exc:
        raise HTTPException(status_code=404, detail=str(exc)) from exc

    return FileResponse(
        path=zip_path,
        media_type="application/zip",
        filename=f"finance_{month}.zip",
    )