from typing import Optional, List, Dict
import csv
import io
import os
import json
from datetime import datetime
from sqlalchemy.orm import Session
from app.db.database import transaction
from app.models.inventory import Inventory
from app.models.tcgplayer_product import TCGPlayerProduct
from app.services.inventory_service import InventoryService

class FileProcessingService:
    def __init__(self, cache_dir: str = "app/data/cache/tcgplayer"):
        self.cache_dir = cache_dir
        self.inventory_service = InventoryService()
        os.makedirs(cache_dir, exist_ok=True)

    def _get_cache_path(self, filename: str) -> str:
        return os.path.join(self.cache_dir, filename)