"""GMAL data ingestion endpoint."""

import logging
import os

from fastapi import APIRouter, HTTPException, UploadFile, File
from sqlalchemy import create_engine
from sqlalchemy.orm import Session

from app.config import settings
from app.schemas.gmal import IngestResult
from app.services.excel_parser import parse_gmal_workbook

router = APIRouter()
logger = logging.getLogger(__name__)


@router.post("/ingest", response_model=IngestResult)
async def ingest_gmal_data(file: UploadFile | None = File(None)):
    """Ingest GMAL data from Excel file.

    If no file is uploaded, uses the default file from the data directory.
    Uses a synchronous DB session since openpyxl is synchronous.
    """
    if file:
        # Save uploaded file temporarily
        filepath = f"/tmp/{file.filename}"
        content = await file.read()
        with open(filepath, "wb") as f:
            f.write(content)
    else:
        # Use default data file
        filepath = os.path.join(settings.data_dir, "U-Studio GMAL Asset Job Routes Apr25 ForFranky.xlsx")
        if not os.path.exists(filepath):
            raise HTTPException(status_code=404, detail="Default GMAL file not found in data directory")

    # Use sync engine for openpyxl parsing
    sync_engine = create_engine(settings.database_url_sync)

    try:
        with Session(sync_engine) as db:
            result = parse_gmal_workbook(filepath, db)
        return IngestResult(**result)
    except Exception as e:
        logger.error(f"Ingestion failed: {e}", exc_info=True)
        raise HTTPException(status_code=500, detail=f"Ingestion failed: {str(e)}")
    finally:
        sync_engine.dispose()
        if file and os.path.exists(filepath):
            os.remove(filepath)